- Synthesis of sitting-atop type adducts of diphenyl and dimethyltin(IV) dihalides with meso-tetraarylporphyrins
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Some molecular adducts of dimethyltin(IV) dichloride, diphenyltin(IV) dichloride and diphenyltin(IV) dibromide with para-substituted meso-tetraphenylporphyrin have been prepared. This adducts with general formula [(Me2SnCl2)2/s
- Zabardasti, Abedien,Asadi, Mozaffar,Kakanejadifard, Ali
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- Functionalization of silica surface by tetrahydroxyporphyrin via Si-olinkages
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To construct an interface between a π-conjugated organic molecule and an inorganic/metal surface, 5,10,15,20-tetrakis[4-(5-hydroxypentyloxy)phenyl] porphyrin was chemisorbed on silica gel by refluxing in pyridine. Thermogravimetric analysis confirmed that
- Minamijima, Nagisa,Furuta, Nao,Wakunami, Shintaro,Mizutani, Tadashi
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- Convenient synthetic route of versatile 21-monothiatetraphenylporphyrins of the A4 and AB3 type
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A novel convenient synthetic route for poly-functional 21- monothiatetraphenylporphyrins of the type A4 und AB3 having base labile substituents in meso position was developed. Using this method a series of symmetric and asymmetric 21-thiaporphyrins containing different functional groups at the meso position is reported. The new products were characterized by NMR, UV-Vis and mass spectroscopy.
- Stute, Silvio,Gloe, Kerstin,Gloe, Karsten
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- Optimized synthesis of tetrakis(4-methoxyphenyl)porphin-Co(II)
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Detailed kinetic investigation of Rothemund synthesis of porphyrins was conducted in different solvents. A one-pot synthesis of tetrakis(4- methoxyphenyl)porphin-Co(II) from pyrrole, anisic aldehyde, and cobalt acetate was developed that gave 35% isolated yield. Chlorobenzene was found to be the best solvent for the reaction. The synthesis can be done with either propionic or chloroacetic acid as catalyst with about the same yield. Cobalt prevents the synthesis of the porphyrin, so it has to be added in the reaction mixture only after the synthesis of the free porphyrin is finished. Optimum time is 2-2.5h at a temperature of 130C. Lower temperatures reduce the yield. Potentially, these dependencies can be applied to synthesis of other analogous porphyrins. Copyright Taylor & Francis Group, LLC.
- Gridnev, Alexei A.,Nikiforov, Gregorii A.
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- Hydroxyalkyloxy substituted tetraphenylporphyrins: Mechanism and superoxide scavenging activity
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The novel electrochemical approach based on coulometric response of electro-generated superoxide (O2?-) was used to determine scavenging properties of 2H-5,10,15,20-tetrakis (4-hydroxyphenyl)porphyrin (H2T(4-OHPh)P); 2H-5,
- Kuzmin, Sergey M.,Chulovskaya, Svetlana A.,Parfenyuk, Vladimir I.
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- Expression of Fas antigen and apoptosis caused by 5,10,15,20-tetra(4-methoxyphenyl)porphyrin (TMP) on carcinoma cells: implication for photodynamic therapy
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The photodynamic effects of 5,10,15,20-tetra(4-methoxyphenyl)porphyrin (TMP) on a Hep-2 cell line were investigated. TMP toxicity in the dark and in relation to illumination with visible light was examined. Hep-2 cells were treated with different TMP conc
- Yslas,Alvarez,Marty,Mori,Durantini,Rivarola
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- Substituent and solvent effects on the hyperporphyrin spectra of diprotonated tetraphenylporphyrins
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UV-visible spectra was studied for a series of p-substituted tetraphenylporphyrins (TPP) titrated with strong acid in various solvents. The longest wavelength absorption at 811 nm, however, was the greatest shift for any diprotonated substituted TPP. The magnitude of the shift was enhanced by a solvent effect. Diprotonated TAPP could be observed 10 fluoresce weakly in dichloromethane (DCM) solvent but not in dimethyl sulfoxide. DCM, which light exposure in the presence of a poryphyrin generated sufficient acid to significantly affect the spectrum. The effect was noted quantitatively by placing a dilute (4μM) TTP solution in a diode array spectrophotometer; an effective acid titration could be observed simply by exposing the sample to the monitoring beam over a period of 2 min.
- Weinkauf, James R.,Cooper, Sharon W.,Schweiger, Aaron,Wamser, Carl C.
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- Mono-oxido-bridged heterobimetallic and heterotrimetallic compounds containing titanium(IV) and chromium(III)
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A series of oxido-bridged heterobi- and heterotrimetallic complexes, [(tmtaa)Ti=O→Cr(Por)Cl] and [(tmtaa)Ti=O→Cr(Por)←O=Ti(tmtaa)]+ (tmtaa = 7,16-dihydro-6,8,15,17-tetramethyldibenzo[b,i][1,4,8,11]tetraazacyclotetradecine; Por = 5,10,15,20-tetr
- Huang, Tao,Wu, Xinyuan,Weare, Walter W.,Sommer, Roger D.
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- Photodynamic studies of metallo 5,10,15,20-tetrakis(4-methoxyphenyl) porphyrin: Photochemical characterization and biological consequences in a human carcinoma cell line
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The photodynamic activities of the free-base 5,10,15,20-tetrakis(4-methoxyphenyl)porphyrin (TMP) and their metal complexes with zinc(II) (ZnTMP), copper(II) (CuTMP) and cadmium(II) (CdTMP) have been compared in two systems: reverse micelle of n-heptane/so
- Milanesio,Alvarez,Yslas,Borsarelli,Silber,Rivarola,Durantini
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- Zinc(II) and copper(II) complexes of β-substituted hydroxylporphyrins as tumor photosensitizers
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Novel photosensitizers β-(hydroquinon-2-yl)-5,10,15,20-tetra(4-hydroxylphenyl)porphyrinato zinc(II) (Zn(II)P) and β-(hydroquinon-2-yl)-5,10,15,20-tetra(4-hydroxylphenyl)porphyrinato copper(II) (Cu(II)P) were synthesized and characterized. Their ability of
- Huang, Qimao,Pan, Zhiquan,Wang, Ping,Chen, Zhangping,Zhang, Xiaolian,Xu, Hansheng
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- The coulometric approach to the superoxide scavenging activity determination: The case of porphyrin derivatives influence on oxygen electroreduction
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The electrochemical and antioxidant properties of 5,10,15,20-tetrakis(3′-hydroxyphenyl)porphyrin (H2T(m-OHPh)P) and 5,10,15,20-tetrakis(4′-hydroxyphenyl)porphyrin (H2T(p-OHPh)P) were tested by the cyclic voltammetry (CV) method. It i
- Kuzmin, Sergey M.,Chulovskaya, Svetlana A.,Parfenyuk, Vladimir I.
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- Photodynamic effects of porphyrin and chlorin photosensitizers in human colon adenocarcinoma cells
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A series of tetraaryl porphyrins and chlorins were synthesized and tested for photodynamic activity in human colon adenocarcinoma cells. Photodynamic therapy (PDT) is a cancer treatment involving systemic administration of a tumor-localizing photosensitiz
- Banfi, Stefano,Caruso, Enrico,Caprioli, Stefania,Mazzagatti, Lugi,Canti, Gianfranco,Ravizza, Raffaella,Gariboldi, Marzia,Monti, Elena
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- Part 2. Meso-Tetraphenylporphyrin dimer derivatives as potential photosensitizers in photodynamic therapy
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Studies on the synthesis, singlet oxygen and fluorescence yields and pharmacokinetic properties of three different dimeric porphyrins with an amide linkage (D2-D4) are described and compared with the results recently reported for a dimeric porphyrin (D1).
- Faustino, Maria A. F.,Neves, Maria G. P. M. S.,Cavaleiro, Jose A. S.,Neumann, Marcus,Brauer, Hans-D.,Jori, Giulio
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- DNA Interactions with Porphyrins Bearing Ammonium Side Chains
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Eleven new porphyrins bearing either tertiary amine or ammonium groups with different spacers in the meso position have been synthesized.Five of them were water-soluble enough for DNA binding studies.UV/vis measurements of some derivatives as a function of pH quantifies the porphyrin core protonation postulated recently by Marzilli et al. with an uptake of two protons and pK values of 6.0 or 6.4, respectively.The porphyrins as well as their Cu(II) or Zn(II) derivatives decrease the viscosity of ds(CT) DNA slightly and increase the melting point of DNA by only up to 1.7 deg C at DNA base pair/ligand ratios of 40.DNA causes either a red shift (/= -7 nm) of the Soret bands.These results as well as the observed small hypochromicities show that all new porphyrins interact with DNA without intercalation.However, their affinity in comparison with other macrocycles bearing four positive charges is, based on ethidium bromide assays with C50 values of 7E-8 to 2E-7 M relatively high and points to groove binding contributions by other than electrostatic forces.
- Schneider, Hans-Joerg,Wang, Manxue
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- A comparative study on the catalytic performance of heme and non-heme catalysts: Metal porphyrins versus metal Schiff bases
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Catalytic activity and oxidative stability of a series of iron and manganese porphyrins with 2-chlorophenyl, phenyl and 4-methoxyphenyl at the meso positions and metallosalens (Mn- and Fe-salens) including N,N′-bis(salicylidene)ethylenediamine, N,N′-bis(5- chlorosalicylidene)ethylenediamine and N,N′-bis(2,4-dihydroxysalicylidene)ethylenediamine for the oxidation of olefins with tetra-n-butylammonium periodate (TBAP) and tetra-n-butyl-ammonium Oxone (TBAO) have been investigated and compared. Although the metalloporphyrins showed an increased catalytic activity relative to the Schiff base complexes, the former provided no significant catalytic advantage over the latter. Also, a comparable or slightly higher oxidative stability was observed for the Schiff base complexes under the reaction conditions. Furthermore, in spite of large difference between the oxidizing ability of TBAO and TBAP, similar patterns were observed for the order of catalytic activity and oxidative stability of the used heme and non-heme catalysts. The introduction of a methyl group at the ɑ position of styrene led to an increase in its reactivity, indicating the dominance of electronic effects over the steric ones in these catalytic systems.
- Talaeizadeh, Atefeh,Tofighi, Mahdi,Zakavi, Saeed
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- Synthesis and spectroscopic properties of axial phenoxide and para amino phenoxide incorporated indium (III) porphyrins
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Tetrakis-4-methoxyphenyl indium(III) porphyrins containing phenolic and para amino phenolic moieties in the apical sites have been successfully prepared and characterized spectroscopically. The phases and structure evolutions of prepared porphyrins were d
- Dechan, Padma,Bajju, Gauri Devi
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- A hypervalent Bismuth(III) derivative of Tetrakis-4-methoxyphenyl porphyrin: Synthesis, spectroscopic characterisation and morphological investigations
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In this study, we aimed to synthesize as well as spectroscopically characterize a sitting-atop (SAT) macro molecule of Tetrakis-4-methoxyphenylporphyrinato Bi(III). The bismuth porphyrin was prepared by the reaction of free base macrocycle, 5, 10, 15, 20-
- Dechan, Padma,Bajju, Gauri Devi
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- Construction of multiporphyrin arrays via selective cross-metathesis
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Selective cross-metathesis of type I and type II mesofunctionalized porphyrin olefins afforded alkenyl-coupled dimeric and trimeric porphyrin systems in good yield with excellent E/Z selectivity. The synthetic utility of the method is demonstrated through
- Langford, Steven J.,Latter, Melissa J.,Woodward, Clint P.
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- Efficient oxidation of cycloalkanes with simultaneously increased conversion and selectivity using O2 catalyzed by metalloporphyrins and boosted by Zn(AcO)2: A practical strategy to inhibit the formation of aliphatic diacids
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The direct sources of aliphatic acids in cycloalkanes oxidation were investigated, and a strategy to suppress the formation of aliphatic acids was adopted through enhancing the catalytic transformation of oxidation intermediates cycloalkyl hydroperoxides to cycloalkanols by Zn(II) and delaying the emergence of cycloalkanones. Benefitted from the delayed formation of cycloalkanones and suppressed non-selective thermal decomposition of cycloalkyl hydroperoxides, the conversion of cycloalkanes and selectivity towards cycloalkanols and cycloalkanones were increased simultaneously with satisfying tolerance to both of metalloporphyrins and substrates. For cyclohexane, the selectivity towards KA-oil was increased from 80.1% to 96.9% meanwhile the conversion was increased from 3.83 % to 6.53 %, a very competitive conversion level with higher selectivity compared with current industrial process. This protocol is not only a valuable strategy to overcome the problems of low conversion and low selectivity lying in front of current cyclohexane oxidation in industry, but also an important reference to other alkanes oxidation.
- Shen, Hai-Min,Wang, Xiong,Ning, Lei,Guo, A-Bing,Deng, Jin-Hui,She, Yuan-Bin
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- Molecular glass chemical amplification photoresist based on metalloporphyrin and preparation method and application thereof
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The invention belongs to the technical field of photoresists, and particularly relates to a molecular glass chemical amplification photoresist baed on metalloporphyrin as well as a preparation method and application thereof. A matrix component in the phot
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Paragraph 0067; 0074-0076
(2021/06/23)
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- Porphyrin n-pincer pd(Ii)-complexes in water: A base-free and nature-inspired protocol for the oxidative self-coupling of potassium aryltrifluoroborates in open-air
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Metalloporphyrins (and porphyrins) are well known as pigments of life in nature, since representatives of this group include chlorophylls (Mg-porphyrins) and heme (Fe-porphyrins). Hence, the construction of chemistry based on these substances can be based on the imitation of biological systems. Inspired by nature, in this article we present the preparation of five different porphyrin, meso-tetraphenylporphyrin (TPP), meso-tetra(p-anisyl)porphyrin (TpAP), tetra-sodium meso-tetra(p-sulfonatophenyl)porphyrin (TSTpSPP), meso-tetra(m-hydroxyphenyl)porphyrin (TmHPP), and meso-tetra(m-carboxyphenyl)porphyrin (TmCPP) as well as their N-pincer Pd(II)-complexes such as Pd(II)-meso-tetraphenylporphyrin (PdTPP), Pd(II)-meso-tetra(p-anisyl)porphyrin (PdTpAP), Pd(II)-tetrasodium meso-tetra(p-sulfonatophenyl)porphyrin (PdTSTpSPP), Pd(II)-meso-tetra(m-hydroxyphenyl)porphyrin (PdTmHPP), and Pd(II)-meso-tetra(m-carboxyphenyl)porphyrin (PdTmCPP). These porphyrin N-pincer Pd(II)-complexes were studied and found to be effective in the base-free self-coupling reactions of potassium aryltrifluoroborates (PATFBs) in water at ambient conditions. The catalysts and the products (symmetrical biaryls) were characterized using their spectral data. The high yields of the biaryls, the bio-mimicking conditions, good substrate feasibility, evading the use of base, easy preparation and handling of catalysts, and the application of aqueous media, all make this protocol very attractive from a sustainability and cost-effective standpoint.
- Hanafiah, Marlia M.,Lakkaboyana, Sivarama Krishna,Lakshmidevi, Jangam,Marella, Ravi Kumar,Naidu, Bandameeda Ramesh,Prasad, Sana Siva,Venkateswarlu, Katta
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- Spectroscopic characterization, X-ray molecular structures and cyclic voltammetry study of two (piperazine) cobalt(II) meso-arylporphyin complexes. Application as a catalyst for the degradation of 4-nitrophenol
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Two new cobaltous-porphyrin complexes, namely (μ-piperazine)-bis[(meso-tetra(para-methoxyphenyl)porphyrinato)]cobalt(II) and (piperazine)[meso-tetra(para-chlorophenyl)porphyrin]cobalt(II) dichloromethane disolvate, with the formulas [{CoII(TMPP)}2(μ2-pipz)] (complex 1) and [CoII(TClPP)(pipz)]·2CH2Cl2 (complex 2), were used efficiently as catalysts in the degradation of 4-nitrophenol (4-NP) in an aqueous hydrogen peroxide solution. These cobalt(II)-pipz porphyrin complexes were characterized by a variety of spectroscopic methods including infrared, UV–visible, fluorescence, proton nuclear magnetic resonance, electron paramagnetic resonance (EPR) as well as mass spectrometry. A cyclic voltammetry investigation was also carried out on these two Co(II) metalloporphyrins. The EPR results indicate that both complexes 1 and 2 are paramagnetic low-spin (S = 1/2) cobalt(II) porphyrin complexes. Furthermore, the X-ray diffraction crystal structures of 1 and 2 were determined, and the intermolecular interactions were investigated by Hirshfeld surface analysis.
- Al-Ghamdi, Youssef O.,Brahmi, Jihed,Guergueb, Mouhieddinne,Guerineau, Vincent,Loiseau, Frédérique,Molton, Florian,Nasri, Habib,Nasri, Soumaya,Roisnel, Thierry
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- Selective Solvent-Free and Additive-Free Oxidation of Primary Benzylic C–H Bonds with O2 Catalyzed by the Combination of Metalloporphyrin with N-Hydroxyphthalimide
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Abstract: A protocol for solvent-free and additive-free oxidation of primary benzylic C–H bonds with O2 was presented through adjusting the combination of metalloporphyrins and NHPI as binary catalysts to overcome the deficiencies encountered in current oxidation systems. The effects of reaction temperature, porphyrin structure, central metal, catalyst loading and O2 pressure were investigated systematically. For the optimized combination of T(2-OCH3)PPCo and NHPI, all the primary benzylic C–H bonds could be functionalized efficiently and selectively at 120 °C and 1.0?MPa O2 with aromatic acids as the primary products. The selectivity towards aromatic acids could reach up to 70–95% in the conversion of more than 30% for most of the substrates possessing primary benzylic C–H bonds in the metalloporphyrin loading of 0.012% (mol/mol). And the superior performance of T(2-OCH3)PPCo among the metalloporphyrins investigated was mainly attributed to its high efficiency in charge transfer and fewer positive charges around central metal Co (II) which favored the adduction of O2 to cobalt (II) forming the high-valence metal-oxo complex followed by the production of phthalimide N-oxyl radical (PINO) and the initiation of the catalytic oxidation cycle. This work would provide not only an efficient protocol in utilization of hydrocarbons containing primary benzylic C–H bonds, but also a significant reference in the construction of more efficient C–H bonds oxidation systems. Graphic Abstract: The solvent-free and additive-free oxidation of primary benzylic C–H bonds with O2 was presented through adjusting the combination of metalloporphyrins and NHPI as binary catalysts, and the highest selectivity towards aromatic acid reached up to 95.1% with the conversion of 88.5% in the optimized combination of T(2-OCH3)PPCo and NHPI.[Figure not available: see fulltext.].
- Shen, Hai-Min,Qi, Bei,Hu, Meng-Yun,Liu, Lei,Ye, Hong-Liang,She, Yuan-Bin
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p. 3096 - 3111
(2020/04/29)
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- A new synthesis of porphyrins: Via a putative trans-manganese(iv)-dihydroxide intermediate
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A new method for the synthesis of meso-substituted porphyrins was developed. In this two-step methodology, the first step involves the condensation of pyrroles/dipyrromethanes with aldehydes in a water-methanol mixture under acidic conditions. The second step involves manganese induced cyclization followed by oxidation via PhIO/O2. This methodology has been useful for the synthesis of a wide range of trans-A2B2 porphyrins and also symmetric porphyrins in moderate to good yields. A detailed investigation of the manganese induced cyclization reaction has allowed us to characterize a Mn-porphyrinogen complex. A series of analytical and spectroscopic techniques and DFT calculations have led us to the conclusion that the putative intermediate species are trans-manganese(iv)-dihydroxide complexes. EPR and magnetic susceptibility measurements helped us to assign the oxidation state of the manganese complexes in their native state. The assumption of trans-manganese(iv)-dihydroxide as the true intermediate for this porphyrin synthesis has been authenticated via in situ UV-Vis experiments. This new methodology is certainly different from other previously reported methodologies in many aspects and most importantly these reactions can be easily performed on a gram scale for the synthesis of porphyrins.
- Biswal, Himansu S.,Jena, Subhrakant,Kar, Sanjib,Mondal, Sruti,Patra, Bratati,Sahu, Kasturi
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p. 1424 - 1432
(2020/02/15)
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- Synthesis of meso-substituted corroles and porphyrins using iodine as a catalyst
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Abstract: Different types of corroles and porphyrins are synthesized from substituted aldehydes and pyrrole. The current synthetic method involves iodine as catalyst and proceeds at room temperature itself. By varying the amounts of reactants (i.e., pyrrole and aldehydes), the corrole and porphyrins were obtained in good to excellent yields. These products were characterized by 1H-NMR, UV-visible, and HRMS techniques. The reaction approach utilizes the readily available pyrrole and substituted aldehydes as starting materials and makes this reaction highly attractive in diversity-oriented synthesis. Graphic abstract: Different types of porphyrins and corroles are synthesized from substituted aldehydes and pyrrole using iodine as a catalyst and the reaction proceeds at room temperature itself. By varying the amount of reactants (i.e. pyrrole and aldehydes), the porphyrins and corroles are obtained in good to excellent yields.[Figure not available: see fulltext.]
- Chauhan, Shive M S,Dandia, Anshu
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- Crystallographic elucidations of indium(III) porphyrin conformations, morphology and aggregation behaviour: Comparative optical study of free base porphyrins and their indium(III) derivatives at varying pH
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The supramolecular structural architectures of 5, 10, 15, 20-Tetrakis-(4-methoxyphenylporphyrinato) indium (III) chloride (I) and 5, 10, 15, 20-Tetrakis-(4-methylphenylporphyrinato) indium (III) chloride (II) have been determined from their three dimensio
- Dechan, Padma,Bajju, Gauri Devi,Sood, Puneet,Dar, Umar Ali
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- Synthesis, spectral and redox properties of closely spaced pyrrole-β-position-linked porphyrin-fullerene dyads
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Two free base meso-tetraphenylporphyrin-fullerene dyads, H2PMe-C60, H2POMe-C60, and their zinc complexes, ZnPMe-C60 and ZnPOMe-C60, which the para positions of the meso-tetrasubstituted phenyl groups of the porphyrin core were substituted by methyl(-Me) and methoxyl(-OMe) groups respectively, were synthesized. The porphyrin unit in the synthesized dyads is directly linked to the fullerene entity through the pyrrole-β- position rather than through the traditionally meso-substituted phenyl group, which may be more favorable for electron communication between the donor and the acceptor. They are fully characterized by mass spectrometry, nuclear magnetic resonance, infrared spectroscopy and ultraviolet visible spectroscopy. Experimental results obtained from steady-state fluorescence spectroscopy and cyclic voltammetry show that the coordination of the zinc ions lead to an increase in the singlet excited state energy of the metallated porphyrin unit by about 0.15 eV, and to a reduce in the HOMO level and in the HOMO-LUMO energy gap. The molecular reorganization energy decreases after the electron-donating groups of -Me or -OMe attaching to the para position of the meso-phenyl group of the porphyrin moiety. The results of the energy calculations show that photoinduced electron transfer is thermodynamically favorable for the synthesized porphyrin-C60 dyads. There exists a competition between the photoinduced electron transfer and energy transfer processes from the first singlet excited state of porphyrin core to fullerene moiety. The photoinduced electron transfer rate constant of the dyads were calculated according to Marcus theory. The results indicate that the coordination of metal zinc ions lead to great increase in the electron transfer rate constant. Further, the photoinduced electron transfer rate constant increases in the order ZnP-C60, ZnPMe-C60, ZnPOMe-C60.
- Wu, Zhen-Yi,Yang, Sheng-Yan
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p. 244 - 254
(2019/04/17)
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- Porphyrin synthesis using mechanochemistry: Sustainability assessment
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Looking for sustainable synthetic methodologies, mechanochemistry as a new tool for one-step and two-step approaches for the synthesis of meso-substituted porphyrins was explored. The best results were obtained in a two-step procedure, under liquid-assisted grinding in the oxidation step using 2-methyltetrahydrofuran, an environmentally acceptable solvent, and MnO2 as a heterogeneous oxidant. The sustainability was assessed using two sustainability metrics, E-factor and EcoScale, which allow comparison between procedures and methods.
- Gomes, Carla,Peixoto, Mariana,Pineiro, Marta
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p. 889 - 897
(2019/08/12)
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- A four-phenyl porphine preparation method
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The invention discloses a preparation method of meso-tetraphenylchlorin. The preparation method comprises the steps that 1, a mixed solution of pyrrole and aromatic aldehyde is prepared for standby; 2, a solvent is added into a polymerization reactor, nitrogen displacement is conducted till the concentration of tail oxygen is lower than 1%, the solvent is heated to backflow, the mixed solution obtained in the first step starts to be dropwise added, a reaction is started, after the mixed solution is dropwise added completely, the reaction is continuously conducted for 0.05 h to 0.5 h, and then the reaction is stopped; 3, oxygen-containing gas with the oxygen volume fraction ranging from 5% to 100% is fed into the polymerization reactor for oxidation, cooling is conducted after the oxidation is completed, filtration is conducted to obtain a filter cake and filtrate, and a product is obtained after the filter cake is washed and dried. The preparation method of the meso-tetraphenylchlorin has the advantages that the yield is high, safety and environmental protection are achieved, separation and purification are easy, and the product quality is stable.
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Paragraph 0060; 0123-0128
(2018/03/26)
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- A four-phenyl porphine production method (by machine translation)
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The invention discloses a production method for tetraphenyl porphin. The production method includes the steps that 1, pyrrole and aromatic aldehyde are prepared into a mixed solution for standby application; 2, solvent is added into a polymerization reactor, the pressure of the polymerization reactor is maintained at 1-5 atm, the mixed solution obtained in the step 1 starts to be dripped to start a polymerization reaction, after the reaction is finished, reaction products are cooled to normal temperature, and filter liquor and a filter cake are obtained through filtration; 3, the filter cake obtained in the step 2 and propionic acid are added into an oxidation reactor, oxygen-containing gas is introduced to carry out an oxidation reaction, cooling is carried out after oxidation is finished, a solid and filter liquor are obtained through filtration, and the solid is washed and dried to obtain the tetraphenyl porphin. The production method has the advantages of being high in yield, safe and environmentally friendly, separation and purification are easy, and the production quality is stable.
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Paragraph 0059-0062; 0103-0110; 0118-0124
(2020/02/07)
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- Temperature-responsive Catalyst for the Coupling Reaction of Carbon Dioxide and Propylene Oxide
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The selective synthesis of polypropylene carbonate (PPC) and cyclic propylene carbonate (CPC) from coupling reaction of CO2 and propylene oxide (PO) is a long term pursuing target. Here we report that a temperature controllable porphyrin alumin
- Zhuo, Chunwei,Qin, Yusheng,Wang, Xianhong,Wang, Fosong
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p. 299 - 305
(2018/02/21)
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- Design of two-photon absorbing fluorophores for FRET antenna-core oxygen probes
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Four two-photon absorbing fluorophores A1-A4 are reported and their spectroscopic properties are analyzed for use, in combination with palladium-porphyrinato complexes C1 and C2, as two-photon absorbing antennas and energy donors for FRET-based antenna-co
- Zheng, Zheng,Ayhan, Mehmet Menaf,Liao, Yuan-Yuan,Calin, Nathalie,Bucher, Christophe,Andraud, Chantal,Bretonnière, Yann
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p. 7914 - 7930
(2018/05/24)
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- A One-Step Route to CO2-Based Block Copolymers by Simultaneous ROCOP of CO2/Epoxides and RAFT Polymerization of Vinyl Monomers
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The one-step synthesis of well-defined CO2-based diblock copolymers was achieved by simultaneous ring-opening copolymerization (ROCOP) of CO2/epoxides and RAFT polymerization of vinyl monomers using a trithiocarbonate compound bearin
- Wang, Yong,Zhao, Yajun,Ye, Yunsheng,Peng, Haiyan,Zhou, Xingping,Xie, Xiaolin,Wang, Xianhong,Wang, Fosong
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supporting information
p. 3593 - 3597
(2018/03/05)
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- Iron-based metalloporphyrins as efficient catalysts for aerobic oxidation of biomass derived furfural into maleic acid
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A series of porphyrin type catalysts with the metal active sites of Fe were prepared and investigated in aerobic oxidation of biomass-based furfural to maleic acid (MAD) in aqueous phase. The catalytic performance of meso-tetrakis(4-bromophenyl)porphyrin iron (III) chloride (FeT(p-Br)PPCl) immobilized on different supports was evaluated. It was interesting to find that the catalytic activity varied with the supports and followed the trend: FeT(p-Br)PPCl/SBA–15 > FeT(p-Br)PPCl/meso-ZSM–5 > FeT(p-Br)PPCl/MCM-41. The effect of reaction conditions were discussed in detail over FeT(p-Br)PPCl/SBA-15 catalyst, and 56.1% yield and 73.8% selectivity of MAD were obtained from renewable furfural under the optimal conditions. Moreover, the FeT(p-Br)PPCl/SBA-15 catalyst could be reused five times without a significant decrease of activity in recycling examinations.
- Xie, Yongdi,Huang, Yi,Wu, Chunyan,Yuan, Wenwen,Xia, Yongmei,Liu, Xiang,Wang, Haijun
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- Electrochemical hydrogen evolution by cobalt (II) porphyrins: Effects of ligand modification on catalytic activity, efficiency and overpotential
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Electrochemical H2 evolution of a series of cobalt(II) porphyrins with electron-withdrawing (EW) and electron-donating (ED) substituents at the para positions of the meso-phenyl rings has been investigated in DMSO using acetic acid as a proton source. Our study showed that the nature of substituents significantly influences catalytic activity, efficiency, and the potential at which catalysis occurs. Faradaic efficiencies (FE) ranging from 44 to 99%, turnover numbers (TONs) from 1.5 to 104 (~11 h electrolysis), turnover frequencies (TOFs) from 0.23 to 9.1 h?1, and onset overpotentials from 25 to 445 mV were obtained by tuning the porphyrinic substituents. Cobalt porphyrins with -SO3H, -COOH, or -NH2 groups as the substituents showed high activity and efficiency with more positive onset potentials as compared to the parent [Co(TPP)]. Supports also from the low hydrogen generation activities for complexes with -COOMe, -OMe and -OH groups as the substituents suggest that the acidity of the meso-phenyl substituent plays a key role in enhancing the hydrogen evolution activities during the catalytic processes.
- Beyene, Belete B.,Mane, Sandeep B.,Hung, Chen-Hsiung
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p. H481 - H487
(2018/07/06)
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- Synthesis and Estimation of Radical Scavenging Activity of Tetra(meso-aryl)porphyrins Containing 2,6-Dimethoxyphenol Unit
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Tetra(meso-aryl)porphyrins containing 2,6-dimethoxyphenol unit distant from the macrocycle and adjacent to it have been prepared. Radical scavenging activity of the obtained compounds has been estimated in the model reaction of ethylbenzene oxidation initiated by azobisisobutyronitrile. It has been shown that the phenol hydroxy group ability to inhibit ethylbenzene oxidation depends on the environment of phenol group.
- Rocheva,Mazaletskaya,Sheludchenko,Belykh
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p. 1635 - 1640
(2018/11/10)
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- Selective synthesis of 5-aryl-10-(nitromethyl) substituted 15-azatripyrrane, 15-oxatripyrrane and 15-thiatripyrrane: Access to nitromethyl functionalized A3B-porphyrins
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A chemical strategy toward the selective synthesis of unsymmetrical tripyrranes was developed for the formation of meso-aryl and -nitromethyl substituted A3B porphyrins. The iodine catalyzed addition of meso-substituted dipyrromethanes to nitrovinylarenes to generate unsymmetrical 5-aryl-10-(nitromethyl) substituted 15-azatripyrranes, 15-oxatripyrranes and 15-thiatripyrrane under mild conditions has been investigated. The multicomponent reactions of 15-azatripyrranes provided the construction of meso-aryl and -nitromethyl substituted A3B-porphyrins. To the best of our knowledge, the first examples of 5-aryl-10-(nitromethyl) substituted 15-azatripyrranes, 15-oxatripyrranes and 15-thiatripyrrane, and 5-(nitromethyl)-10,15,20-tris(aryl)porphyrins are introduced in this study.
- Seyitdanlioglu, Pinar,Altundal, Gulberil,Cinar, Seda,Unaleroglu, Canan
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p. 14163 - 14169
(2018/08/28)
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- Theoretical and experimental analysis of porphyrin derivatives with suitable anchoring groups for DSSC applications
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In this contribution, different porphyrin derivatives were experimentally synthesized and theoretically analyzed using several electronic structure methods to study the geometrical and electronic properties of A4, trans-A2B2/su
- Sánchez-Bojorge, Nora A.,Flores-Armendáriz, Simón,Fuentes-Montero, María E.,Ramos-Sánchez, Victor H.,Zaragoza-Galán, Gerardo,Rodríguez-Valdez, Luz M.
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- Photodynamic effect of meso-(aryl)porphyrins and meso-(1-methyl-4-pyridinium)porphyrins on HaCaT keratinocytes
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Sixteen porphyrins, including neutral, anionic and cationic meso-(aryl)porphyrins and meso-(1-methyl-4-pyridinium)porphyrins were herein evaluated in terms of their photosensitizing properties against HaCaT keratinocytes. After an initial screening, the cationic porphyrins were studied in more details, by both determining their log POWand performing PDT assays in lower porphyrin concentrations. Porphyrins presenting two or more adjacent positively charged groups, directly linked to the macrocycle meso positions, appeared to be the most effective photosensitizers. The present study also included the dicationic 5,10-diphenyl-15,20-di(1-methylpyridinium-4-yl)porphyrin (14b), which has previously shown promising results on a psoriasis-like in vivo model. Overall results indicated that the beneficial effect related to porphyrins on psoriasis can be related to the decreasing of keratinocyte viability. Furthermore, some of the cationic porphyrins studied appeared as candidates to be utilized as photosensitizers for psoriasis treatment.
- Slomp, Amanda M.,Barreira, Sandra M.W.,Carrenho, Luise Z.B.,Vandresen, Camila C.,Zattoni, Ingrid F.,Ló, Stephanie M.S.,Dallagnol, Juliana C.C.,Ducatti, Diogo R.B.,Orsato, Alexandre,Duarte, M. Eugênia R.,Noseda, Miguel D.,Otuki, Michel F.,Gon?alves, Alan G.
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supporting information
p. 156 - 161
(2016/12/27)
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- A method for preparing cyclic carbonic ester
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The invention provides a preparation method of cyclic carbonate. The preparation method comprises the following steps: under actions of a main catalyst and a co-catalyst, carrying out a cyclization reaction of carbon dioxide and an epoxide, and thus obtaining the cyclic carbonate. The main catalyst is a metalloporphyrin complex, and the metalloporphyrin complex has a structure represented by the formula I; the co-catalyst is one or more of a quaternary ammonium salt, a quaternary phosphonium salt and an organic base. Compared with the prior art, the metalloporphyrin complex can be used as the catalyst for catalyzing the cyclization reaction of carbon dioxide and the epoxide, and the metalloporphyrin complex as the main catalyst shows extremely high catalytic activity. In addition, in the cyclization reaction process, the metalloporphyrin complex as the main catalyst has relatively high selectivity on the reaction product, inhibits the polycarbonate generation, and improves the content of cyclic carbonate in the product; and the metalloporphyrin complex is recyclable and reused and keeps the high catalytic activity.
- -
-
Paragraph 0122
(2017/08/25)
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- Facile synthesis of β-functionalized “push-pull” Zn(II) porphyrins for DSSC applications
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Three new β-substituted “push-pull” Zn(II) porphyrin dyes with various electron donors at meso-positions and cyanoacetic acid as acceptor at β-position have been designed and synthesized. These porphyrins have been characterized by UV-Vis, Fluorescence,
- Prakash, Kamal,Manchanda, Shweta,Sudhakar, Vediappan,Sharma, Nidhi,Sankar, Muniappan,Krishnamoorthy, Kothandam
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- Asymmetrically substituted tetra(meso-aryl)porphyrins bearing peripheral 2,6-diisobornylphenol and 2,6-di-tert-butylphenol moieties
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Asymmetrically substituted tetra(meso-aryl)porphyrins bearing peripheral diisobornyl- phenol and di-tert-butylphenol moieties were synthesized by a mixed aldehyde condensation.
- Belykh,Rocheva,Buravlev,Chukicheva, I. Yu.,Kutchin
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p. 2131 - 2135
(2018/03/22)
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- Metalloporphyrin-Based Hypercrosslinked Polymers Catalyze Hetero-Diels–Alder Reactions of Unactivated Aldehydes with Simple Dienes: A Fascinating Strategy for the Construction of Heterogeneous Catalysts
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We describe a novel and intriguing strategy for the construction of efficient heterogeneous catalysts by hypercrosslinking catalyst molecules in a one-pot Friedel–Crafts alkylation reaction. The new hypercrosslinked polymers (HCPs) as porous solid catalysts exhibit the combined advantages of homogeneous and heterogeneous catalysis, owing to their high surface area, good stability, and tailoring of catalytic centers on the frameworks. Indeed, a new class of metalloporphyrin-based HCPs were successfully synthesized using modified iron(III) porphyrin complexes as building blocks, and the resulting networks were found to be excellent recyclable heterogeneous catalysts for the hetero-Diels–Alder reaction of unactivated aldehydes with 1,3-dienes. Moreover, this new strategy showed wide adaptability, and many kinds of homogeneous-like solid-based catalysts with high catalytic performance and excellent recyclability were also constructed.
- Dou, Zhiyu,Xu, Li,Zhi, Yongfeng,Zhang, Yuwei,Xia, Hong,Mu, Ying,Liu, Xiaoming
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supporting information
p. 9919 - 9922
(2016/07/19)
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- Synthesis and characterization of some new thallium(III) macrocyclic complexes and their biological studies
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New symmetrically para-substituted tetraphenylporphyrin Tl(III) salicylate complexes, having the general formula SA/5-SSATl(III)t(4-Y)PP (Y=-H, -CH3, -OCH3); SA=salicylates and 5-SSA=5-sulfosalicylates, were synthesized and character
- Bajju, Gauri D.,Katoch, Sapna,Devi, Gita,Kundan, Sujata,Ashu,Bhagat, Madhullika
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- Synthesis, photophysical properties and biological evaluation of β-alkylaminoporphyrin for photodynamic therapy
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A series of β-alkylaminoporphyrins conjugated with different amines at β position (D1–D3) or with electron-donating and electron-withdrawing substituents at phenyl position (D4–D6) were synthesized. Their photophysical and photochemical properties, intracellular localization, photocytotoxicities in vitro and vivo were also investigated. All target compounds exhibited no cytotoxicities in the dark and excellent photocytotoxicities against HeLa cells. Among them, D6 showed the highest phototoxicity and the lowest dark toxicity, which was more phototoxic than Hematoporphyrin monomethyl ether (HMME). In addition, D6 exhibited best photodynamic antitumor efficacy on BALB/c nude mice bearing HeLa tumor. Therefore, D6 is a powerful and promising antitumor photosensitizer for photodynamic therapy.
- Liao, Ping-Yong,Wang, Xin-Rong,Gao, Ying-Hua,Zhang, Xiang-Hua,Zhang, Li-Jun,Song, Chun-Hong,Zhang, Dan-Ping,Yan, Yi-Jia,Chen, Zhi-Long
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p. 6040 - 6047
(2016/11/09)
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- Tetraphenylporphyrin derivatives possessing piperidine group as potential agents for photodynamic therapy
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Photodynamic therapy (PDT) is a noninvasive therapeutic and promising procedure in cancer treatment and has attracted considerable attention in recent years. In the present paper, 2-piperidinetetraphenylporphyrin derivatives (P1–P3) conjugated with differ
- Liao, Ping-Yong,Gao, Ying-Hua,Wang, Xin-Rong,Bao, Lei-Lei,Bian, Jun,Hu, Tai-Shan,Zheng, Mei-Zhen,Yan, Yi-Jia,Chen, Zhi-Long
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p. 213 - 219
(2016/11/18)
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- Cyclopropanation reactions catalysed by dendrimers possessing one metalloporphyrin active site at the core: Linear and sigmoidal kinetic behaviour for different dendrimer generations
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Experimental and computational studies on dendrimers possessing a Fe(porphyrin) catalytic core and polyether dendritic arms show that these macromolecules promote efficiently the (2+1) cycloaddition between a model alkene and diazomethane. The reaction is
- Vin?, Petr,De Cózar, Abel,Rivilla, Iván,Nováková, Kate?ina,Zangi, Ronen,Cva?ka, Josef,Arrastia, Iosune,Arrieta, Ana,Dra?ar, Pavel,Miranda, José I.,Cossío, Fernando P.
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p. 1120 - 1131
(2016/07/06)
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- ORGANIC DYE COMPLEX AND MANUFACTURING METHOD THEREFOR
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PROBLEM TO BE SOLVED: To provide an organic dye complex having a wider area of absorption wavelengths, especially a wider area of absorption wavelengths in a near-infrared region. SOLUTION: There is provided a composite of a specific phthalocyanine derivative and a porphyrin derivative having a structure of the formula (2). In the formula (2), A, B, C and D represent each independently a hydrogen atom, a halogen atom or a monovalent organic group, at least two of the A to D are substituted or unsubstituted aryl or substituted or unsubstituted heteroaryl, M2 represents at least one atom or atom group that may bind with porphyrin. COPYRIGHT: (C)2015,JPO&INPIT
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Paragraph 0198-0200
(2018/10/03)
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- Electrochemical determination of antioxidant properties of a series of tetraphenylporphyrin derivatives and their zinc complexes
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Zinc complexes of a series of substituted tetraphenylporphyrins containing OH-groups in the phenyl rings were synthesized. Their antioxidant capacity was estimated in reaction of the porphyrins with 2,2′-diphenyl-1-picrylhydrazyl (DPPH) by cyclic voltamme
- Tesakova, Mariya V.,Semeikin, Aleksandr S.,Parfenyuk, Vladimir I.
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p. 1032 - 1038
(2015/10/29)
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- High-Boron-Content Porphyrin-Cored Aryl Ether Dendrimers: Controlled Synthesis, Characterization, and Photophysical Properties
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The synthesis and characterization of a set of poly(aryl ether) dendrimers with tetraphenylporphyrin as the core and 4, 8, 16, or 32 closo-carborane clusters are described. A regioselective hydrosilylation reaction on the allyl-terminated functions with c
- Cabrera-González, Justo,Xochitiotzi-Flores, Elba,Vi?as, Clara,Teixidor, Francesc,García-Ortega, Héctor,Farfán, Norberto,Santillan, Rosa,Parella, Teodor,Nú?ez, Rosario
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supporting information
p. 5021 - 5031
(2015/05/27)
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- Exploiting novel process windows for the synthesis of meso-substituted porphyrins under continuous flow conditions
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Porphyrin synthesis by classical methods frequently involves the use of high temperatures, toxic and dangerous reagents yielding the product in very low amounts and with poor scalability. Herein, we have studied the synthesis of meso-substituted porphyrin
- Momo, Patrícia B.,Bellete, Barbara S.,Brocksom, Timothy J.,De Souza, Rodrigo O. M. A.,De Oliveira, Kleber T.
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p. 84350 - 84355
(2015/10/28)
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- Synthesis and characterization of tetraarylporphyrins in the presence of nano-TiCl4·SiO2
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[MediaObject not available: see fulltext.] Synthesis of tetraarylporphyrins by the coupling of an aromatic aldehyde and pyrrole using nano-TiCl4·SiO2 as mild, inexpensive, and highly efficient catalyst is studied in the present article.
- Zamani, Leila,Mirjalili, Bi Bi Fatemeh
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p. 578 - 581
(2016/02/16)
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- A simple method for efficient synthesis of tetrapyridyl-porphyrin using Adler method in acidic ionic liquids
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We investigated the preparation of tetraphenylporphyrin (TPP) using the several acidic ionic liquids, [HC4im][X] (X- = CF 3SO3-, ClO4-, Cl -, CF3CO2-, and BF4 -), as acid catalytic media. For such ionic liquids, the anion (X-) of [HC4im][X] is related to the acidity of the ionic liquid, and affects porphyrin formation. This synthetic method using acidic ionic liquids can also be applied to other meso-substituted phenyl porphyrins and 5,10,15,20-tetra(4-pyridyl)-21H,23H-porphine (TPyP), which has 4-pyridyl moieties at four meso positions. In [HC4im][CF3CO 2], TPyP could be obtained in 11% yield, and the [HC 4im][CF3CO2] could be reused at least 3 times without any loss of its catalytic activity. The TPyP synthesis methodology using acidic ionic liquids can remove the ionic liquids from TPyP by easy filtration in contrast to the traditional Alder method, which needs vacuum distillation or liquid-liquid extraction for removing propionic acid. Our proposed porphyrin preparation method using the acidic ionic liquids potentially have wide applications to various useful porphyrin analogues. This journal is the Partner Organisations 2014.
- Kitaoka, Satoshi,Nobuoka, Kaoru,Ihara, Keita,Ishikawa, Yuichi
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p. 26777 - 26782
(2014/07/21)
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- Oxidation of hydrocarbons with tetra-n-butylammonium peroxy monosulfate catalyzed by β-tetrabromo-meso-tetrakis(4-methoxyphenyl)-and β-tetrabromo-meso-tetraphenylporphyrinatomanganese(III)
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β-Tetrabromo-meso-tetrakis(4-methoxyphenyl)porphyrin, H2 T(4-OCH3 P)PBr4, was synthesized and characterized by UV-Vis and 1H NMR spectroscopy. Oxidation of alkanes and olefins with tetra-n-butylammonium peroxymonosulfate (n-Bu4NHSO5) was studied in the presence of MnT(4-OCH3 P)PBr4 (OAc) and MnTPPPBr4 (OAc) (TPP = meso-tetraphenylporphyrin). While significance differences were observed between the catalytic activities of the title complexes in the oxidation of alkanes, the 2 manganese porphyrins showed comparable activities in oxidation of most of the olefins used. However, the latter showed greater catalytic performance in the oxidation of the hydrocarbons. Moreover, the oxidative degradation of the former (60%) was greater than that of the latter (45%) in the oxidation of cyclooctene. TUeBITAK.
- Rayati, Saeed,Zakavi, Saeed,Valinejad, Hossein
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p. 611 - 616
(2014/07/07)
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- Synthesis of substituted meso-tetraphenylporphyrins in mixed solvent systems
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An efficient synthetic method of substituted meso-tetraphenylporphyrins with better isolated yields was proposed by using propionic acid, valeric acid and m-nitrotoluene as mixed-solvent systems. The porphyrin yields in mixed solvent systems were obviousl
- Sun, Zhicheng,She, Yuanbin,Cao, Meijuan,Zhou, Qing,Lu, Xingmei,Zhang, Suojiang
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p. 389 - 400
(2013/07/26)
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- Unexpected one-pot synthesis of A3-type unsymmetrical porphyrin
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The first direct synthesis of A3-type unsymmetrical porphyrin is achieved via conventional pyrrole-aldehyde condensation in a one-pot procedure in an appreciable yield. Generalization of this approach to a variety of other aldehydes revealed th
- Mahmood, Mian Hr,Liu, Hai-Yang,Wang, Hua-Hua,Jiang, Yi-Yu,Chang
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p. 5853 - 5856
(2013/10/21)
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- Cobaltoporphyrin-catalyzed CO2/epoxide copolymerization: Selectivity control by molecular design
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A series of cobalt(III) chloride porphyrin complexes of the general formula 5,10,15,20-tetra(p-alkoxy)phenylporphyrin cobalt chloride (4b-e) and the related 5,10,15,20-tetra(p-nitro)phenylporphyrin cobalt chloride (4f) are presented and their reactivity toward propylene oxide (PO)/CO2 coupling/copolymerization is explored. While the nitro-substituted complex (4f), in conjunction with an onium salt, shows moderate activity toward cyclization, the 4b-e/onium systems show superior copolymerization activity in comparison to tetraphenylporphyrin Co(III) chloride (4a) with high selectivity and conversion to poly(propylene carbonate) (PPC). A comprehensive copolymerization behavior study of the alkoxy-substituted porphyrin complexes 4b-e in terms of reaction temperature and CO2 pressure is presented. Complexes bearing longer alkoxy-substituents demonstrate the highest polymerization activity and molecular weights, however all substituted catalyst systems display a reduced tolerance to increased temperature with respect to PPC formation. Studies of the resulting polymer microstructures show excellent head-to-tail epoxide incorporation and near perfectly alternating poly(carbonate) character at lower polymerization temperatures.
- Anderson, Carly E.,Vagin, Sergei I.,Xia, Wei,Jin, Hanpeng,Rieger, Bernhard
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p. 6840 - 6849,10
(2020/08/24)
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- Synthesis and characterization of new molecular complexation between free base meso-tetraarylporphyrins and nitrosonium ion as π-acceptor
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NOBF4 reacts with para-substituted meso-tetraarylporphyrins, H2t(4-Xp)p, at room temperature for formation of green molecular complexes, [H2t(4-Xp)p(NO)]BF4. Mole ratio for the porphyrins and nitrosonium ion in the molecular complexes was 1:1, [H 2T(4-X)PP(NO)]BF4. FT-IR, UV-Vis, (1H and 13C) NMR spectral data, elemental analysis and molar conductivity indicated that NO+ (as electron acceptor) is bound to the lone electron pairs of the two pyrrolenine nitrogens in a side of the porphyrin plane. In these molecular complexes, two pyrrolic nitrogen atoms of the porphyrin core coordinate to the acceptor and two protons of the pyrrolic nitrogen atoms have been remained on the porphyrin macrocycles. Molecular complexation of meso-tetraarylporphyrins with NO+ produces a large downfield shift for the NH signal.
- Molaei, Halimeh,Dehghani, Hossein
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experimental part
p. 133 - 136
(2012/05/20)
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- Novel complexes of Mn(III) with macrocylic porphine ligand and ethylenediamine
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The present work describes the synthesis and characterization of a few Mn(III) porphyrins with ethylenediamine. A new series of high-spin Mn(III) porphyrins having general formula [Mn(TMPP)X] and [Mn(TMPP)X(en)], where TMPP=tetra-p-methoxyphenylporphinato
- Yadava, Sudha,Bharati, Shashi Lata
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experimental part
p. 3950 - 3959
(2012/03/27)
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- Synthesis of meso-tetraarylporphyrins using SeO2 as oxidant
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The oxidative step of the two-step, one-flask synthesis of meso-tetraarylporphyrins is herein conducted with heterogeneous oxidant SeO 2 instead of the usual quinones DDQ or p-chloranil. Evaluation of BF3O(Et)2 or I2 amount for the condensation of the first step combined with the excess of SeO2 defined porphyrin synthesis conditions employing benzaldehydes and pyrrole (or 5-phenyldipyrromethane) as starting materials. The simplicity of the workup, allied with reaction mild conditions, makes this method a good option for the synthesis of this kind of compound.
- Ló, Stephanie M.S.,Ducatti, Diogo R.B.,Duarte, M. Eugênia R.,Barreira, Sandra M.W.,Noseda, Miguel D.,Gonalves, Alan G.
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experimental part
p. 1441 - 1443
(2011/06/10)
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- Synthesis, characterization and spectral properties of substituted tetraphenylporphyrin iron chloride complexes
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A series of substituted tetraphenylporphyrin iron chloride complexes [RTPPFe(III)Cl, R=o/p-NO2, o/p-Cl, H, o/p-CH3, o/p-OCH3] were synthesized by a novel universal mixed-solvent method and the spectral properties of free b
- Sun, Zhi-Cheng,She, Yuan-Bin,Zhou, Yang,Song, Xu-Feng,Li, Kai
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scheme or table
p. 2960 - 2970
(2011/06/21)
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