- Synthesis and characterization of new copolyacrylates containing porphyrin units as pendant groups and their use as sensors
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Novel copolyacrylates containing various molar ratios of 5,10,15-tri[p-(9-methoxy-triethylenoxy)phenyl]-20-(p-acryloxyphenyl)porphyrin units in the chains have been synthesized, and their chemical structure was determined by NMR and MALDI-TOF mass spectrometry. Sensing response of the synthesized copolymers has been tested for trifluoroacetic and hydrochloric acids and nitrogen dioxide analytes. The reported sensing data indicate that porphyrin units are interacting with analytes in a reversible fashion.
- Dattilo,Mineo,Scamporrino,Spina,Vitalini
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- Preparation and characterization of technetium-99m complexes with new diphosphines containing polyether groups
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We report the synthesis and characterization of three new diphosphine ligands with polyether groups of general formula R(OCH2CH 2)nPPhCH2CH2PPh(CH 2CH2O)nR: 1 (R = Me, n = 3), 2 (R = Bu, n = 3) and 3 (R = Bu, n = 4). trans-[99mTcO2L2] + complexes were prepared by reaction between the diphosphine ligands and the 99mTc-gluconate precursor. The homologous rhenium complexes, trans-[ReO2L2]Cl (L = 1,2,3), were synthesized by ligand substitution reaction with [ReO2py4]Cl and oxorhenium (V) gluconate, and characterized by IR, ESMS and 1H, 13C{ 1H}, 31P{1H} NMR spectroscopy. All these data are consistent with the formation of diphosphine complexes chelated to the trans-ReO2 unit. The HPLC analyses of rhenium and 99mTc complexes display very similar profiles and retention times, consistent with the formation of the homologous complexes. Preliminary biodistribution studies with rats show significant differences between the behaviour of the three 99mTc complexes. Copyright
- Valls, Esteve,Martin, David,Piera, Carlos,Suades, Joan
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- A polyoxy group branched diazo dye as an alternative material for the fabrication of an electrochemical epinephrine sensor
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In the present study, a novel diazo dye with a polyoxy group (2{2[2(2-methoxyethoxy)ethoxy]ethoxy}-5-[(E)-(4-nitrophenyl)diazenyl]benzaldehyde (AZOTEG)) was used as a modifier to fabricate modified electrochemical platforms for epinephrine detection. For this purpose, a carbon paste electrode (CPE), which was the working electrode, was modified with AZOTEG molecules. An increase in epinephrine oxidation peak current with a negative shift in peak potentials demonstrated the electrocatalytic effect of the AZOTEG/CPE compared to the plain CPE. After the observation of this effect, experimental parameters like AZOTEG amount and pH were optimized. Then, the electrochemical mechanism was investigated by obtaining cyclic voltammograms versus scan rates. Under the optimized conditions, the analytical characteristics were examined and as a result, a wide linear range (0.1-75 μM) with a limit of detection and a limit of quantification of 0.013 μM and 0.042 μM (n = 3) were obtained. After the examination of the interference effect of uric acid, the developed sensor was successfully used for epinephrine detection in adrenaline injection samples.
- Avci, Okan,Perk, Benay,?ren Varol, Tu?ba,Tepeli Büyüksünet?i, Yudum,Hakli, ?zgül,Anik, ülkü
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- Ruthenium complex immobilized on supported ionic-liquid-phase (SILP) for alkoxycarbonylation of olefins with CO2
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In this study, the heterogeneously catalyzed alkoxycarbonylation of olefins with CO2based on a supported ionic-liquid-phase (SILP) strategy is reported for the first time. An [Ru]@SILP catalyst was accessed by immobilization of ruthenium complex on a SILP, wherein imidazolium chloride was chemically integrated at the surface or in the channels of the silica gel support. An active Ru site was generated through reacting Ru3(CO)12with the decorated imidazolium chloride in a proper microenvironment. Different IL films, by varying the functionality of the side chain at the imidazolium cation, were found to strongly affect the porosity, active Ru sites, and CO2adsorption capacity of [Ru]@SILP, thereby considerably influencing its catalytic performance. The optimized [Ru]@SILP-A-2 displayed enhanced catalytic performance and prominent substrate selectivity compared to an independent homogeneous system under identical conditions. These findings provide the basis for a novel design concept for achieving both efficient and stable catalysts in the coupling of CO2with olefins.
- Xia, Shi-Ping,Ding, Guang-Rong,Zhang, Rui,Han, Li-Jun,Xu, Bao-Hua,Zhang, Suo-Jiang
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supporting information
p. 3073 - 3080
(2021/05/05)
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- SULFONIUM SALT, RESIST COMPOSITION AND PATTERNING PROCESS
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The present invention refers to a formula (1a) or (1b) provides sulfonium salt represented by. Said in formula, R may contain hetero atoms in the carbon atoms 7 ~ 30 linear, branched or annular of 1 of hydrocarbon group having an, n ' an integer of the 1 ~ 4. [...] of the present invention, conventional [...] the having high hydrophilicity different and have a phenolic hydroxyl or ethylene [...] , specific anion of the present invention in combination with the when used in resist material sulfonium salt immersion possibility and and reduced in elution to, yet pattern dependence (dark color illumination color difference) is laminated in the transistor circuit, chemical amplification type resist material photoacid generator. as number. (by machine translation)
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Paragraph 0132; 0133
(2016/12/22)
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- Homogeneous liquid-liquid extraction of metal ions with non-fluorinated bis(2-ethylhexyl)phosphate ionic liquids having a lower critical solution temperature in combination with water
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Ionic liquids with an ether-functionalised cation and the bis(2-ethylhexyl)phosphate anion show thermomorphic behaviour in water, with a lower critical solution temperature. These ionic liquids are useful for homogeneous liquid-liquid extraction of first-row (3d) transition metals.
- Depuydt, Daphne,Liu, Liwang,Glorieux, Christ,Dehaen, Wim,Binnemans, Koen
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supporting information
p. 14183 - 14186
(2015/09/15)
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- Highly efficient synthesis of cyclic carbonates from epoxides catalyzed by salen aluminum complexes with built-in "cO2 capture" capability under mild conditions
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A series of monometallic salen aluminum complexes were prepared by covalent linkage of the imidazolium-based ionic liquid moieties containing various polyether chains with the salen ligand at the two sides of the 5,5′-position. The salen aluminum complexes proved to be efficient and recyclable homogeneous catalysts towards the organic solvent-free synthesis of cyclic carbonates from epoxides and CO2 in the absence of a co-catalyst. The catalysts presented excellent "CO2 capture" capability due to the molecules containing polyether chains and the metal aluminum center, in which >90% yield of cyclic carbonate could be obtained under mild conditions. The catalysts can be easily recovered and six times reused without significant loss of activity and selectivity. Moreover, based on experimental and previous work, the "CO2 capture and activation" cycloaddition reaction mechanisms by monometallic or bimetallic salen aluminum complexes were both proposed.
- Luo, Rongchang,Zhou, Xiantai,Chen, Shaoyun,Li, Yang,Zhou, Lei,Ji, Hongbing
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p. 1496 - 1506
(2014/03/21)
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- Strong two-photon absorption enhancement in a unique bis-porphyrin bearing a diketopyrrolopyrrole unit
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A π-extended bis-porphyrin bridged via a diketopyrrolopyrrole unit was prepared in 5 steps. This fully conjugated π-system displays strongly distorted linear absorption, while its two-photon absorption cross-section reaches 2500-3000 GM at 940 nm. LC-like behaviour, easy orientation and low viscosity are, according to XRD, POM and DSC measurements, due to formation of plastic rather than a liquid crystal.
- Nowak-Krol, Agnieszka,Grzybowski, Marek,Romiszewski, Jerzy,Drobizhev, Mikhail,Wicks, Geoffrey,Chotkowski, Maciej,Rebane, Aleksander,Gorecka, Ewa,Gryko, Daniel T.
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supporting information
p. 8368 - 8370
(2013/09/23)
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- Highly efficient SO2 capture by dual functionalized ionic liquids through a combination of chemical and physical absorption
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Two kinds of dual functionalized ionic liquids with ether-functionalized cations and tetrazolate anions were designed, prepared, and used for SO 2 capture, which exhibit an extremely high SO2 capacity and excellent reversibility through a combination of chemical and physical absorption. The Royal Society of Chemistry 2012.
- Cui, Guokai,Wang, Congmin,Zheng, Junjie,Guo, Yan,Luo, Xiaoyan,Li, Haoran
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supporting information; experimental part
p. 2633 - 2635
(2012/04/17)
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- Highly soluble polyoxyethylene-perylene diimide: Optical, electrochemical and photovoltaic studies
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The synthesis and optical properties of a new dye molecule [PERKAT] were reported. The molecular structure of PERKAT was characterized by FT-IR and 1H NMR. Optical properties of PERKAT were investigated by UV-Vis absorption, fluorescence spectroscopy. The effect of the solvent polarity on the spectral characteristics has been investigated in five common organic solvents of different polarity. PERKAT is highly soluble in common organic solvents such as chloroform, dichloromethane due to the polyoxyethylene chains. The fluorescence quantum yields of PERKAT in all solvents is very low (10 -2 -10-3). Cyclic Voltammetry (CV) analysis was performed to determine the HOMO and LUMO energy levels of the PERKAT. PERKAT was used as electron acceptor material in organic solar cell.
- Birel, O. Hakli,Zafer, Ceylan,Dincalp, Haluk,Aydin, Banu,Can, Mustafa
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experimental part
p. 562 - 569
(2012/01/02)
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- 1H, 13C NMR, FT-IR, ESI MS and PM5 studies of a new 3,6,9-trioxadecylamide of monensin A and its complexes with Li+, Na+ and K+ cations
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A new 3,6,9-trioxadecylamide of monensin A (M-AM4) has been synthesised and its ability to form complexes with Li+, Na+ and K + cations has been studied by ESI mass spectrometry, 1H and 13C NMR, FT-IR spectroscopy and PM5 semiempirical method. The ESI MS data indicate that M-AM4 forms complexes with Li+, Na+ and K+ of exclusively 1:1 stoichiometry which are stable up to cv = 70 V. The formation of the M-AM4-Na+ is strongly favoured. Above cv = 70 the fragmentation process is observed. The spectroscopic studies show that the structures of the M-AM4 and its complexes with the cations of 1:1 stoichiometry are stabilized by intramolecular hydrogen bonds in which the OH groups are always involved. The CO amide group is engaged in the complexation process of each cation. The M-AM4-K+ complex can also assume a structure in which the CO amide group does not participate in the complexation but the complexes of such structure do not dominate.
- ?owicki, Daniel,Huczyński, Adam,Brzezinski, Bogumil,Bartl, Franz
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experimental part
p. 121 - 131
(2011/04/23)
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- Spectroscopic studies and PM5 semiempirical calculations of new hydrazone of gossypol with 3,6,9-trioxadecylhydrazine
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A new hydrazone of gossypol with 3,6,9-trioxadecylhydrazine (GHTO) has been synthesised and its structure has been studied by 1H NMR, 13C NMR, FT-IR spectroscopy and PM5 semiempirical methods. The results have shown that the newly synthesised hydrazone exists in solution in the N-imine-N-imine tautomeric form, stabilized by several intramolecular hydrogen bonds among which the O7H ?N16 intramolecular hydrogen bond is the strongest. The structure of GHTO is visualized by the PM5 semiempirical calculations.
- Bejcar, Grzegorz,Przybylski, Piotr,Walkowiak, Monika,Brzezinski, Bogumil
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- Solution-phase parallel synthesis with oligoethylene glycol sorting tags. Preparation of all four stereoisomers of the hydroxybutenolide fragment of murisolin and related acetogenins
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The principles of the oligoethylene glycol (OEG) mixture synthesis are illustrated with the synthesis of all four possible stereoisomers of a hydroxybutenolide fragment common to murisolin and many other acetogenins. Modified dimethoxybenzyl groups with varying numbers of OEG units (-CH 2CH2O-) are used to protect alcohols and serve as codes for configurations at two stereocenters. The encoded isomers are carried through several steps in a sequence of mixing prior to the reaction and then demixing during the separation to give individual pure products. A new tagging scheme is introduced in which a stereocenter bearing a hydroxy group is given two different tags. These initially redundant tags then serve to encode the configuration of another (untagged) stereocenter by appropriate pairwise reactions of the tagged precursors. The experimental features (reaction, analysis, separation, and characterization) of OEG mixture synthesis are detailed and are compared to and contrasted with those of fluorous mixture synthesis.
- Gudipati, Venugopal,Curran, Dennis P.,Wilcox, Craig S.
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p. 3599 - 3607
(2007/10/03)
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- Quantification of grafted poly(ethylene glycol)-silanes on silicon by time-of-flight secondary ion mass spectrometry
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Silicon grafted monodisperse poly(ethylene glycol) (PEG) silanes with various PEG chain lengths and mixtures of these were systematically analyzed with static time-of-flight secondary ion mass spectrometry (TOF-SIMS). The mass spectra show differences in the various relative signal intensities, an observation that was used to elucidate important aspects of the grafting process. The relationship between PEG-silane fragment ion abundances and Si+ ion abundances were used to (i) qualitatively describe layer thicknesses of grafted mixtures of PEG-silanes on silicon, (ii) construct a calibration curve from which PEG chain length (or molecular mass) can be determined and (iii) quantitatively determine surface mixture compositions of grafted monodisperse PEG-silanes of different chain lengths (3, 7 and 11 PEG units). The results suggest that discrimination does take place in the adsorption process. The PEG-silane with the shorter PEG chain is discriminated for mixtures containing PEG3-silane, whereas the PEG-silane with the longer PEG chain is discriminated in PEG7/PEG11-silane mixtures. The origin of this difference in adsorption behavior is not well understood. Aspects of the grafting process and the TOF-SIMS analyses are discussed. Copyrigh
- Norrman,Papra,Kamounah,Gadegaard,Larsen
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p. 699 - 708
(2007/10/03)
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- Chelate complexes and processes for their preparation
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Naphthalocyanine-chelate complexes of formula I STR1 are described which contain as central atom M aluminum, gallium, indium, fin, ruthenium or preferably germanium and in which the remaining symbols are as defined in claim 1. The complexes can be used inter alia in the photodynamic chemotherapy of tumors.
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- Synthese et activite biologique de prodrogues de l'acide oxolinique
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Synthesis and biological activities of oxolinic acid pro-drugs.Antiseptic phenols, anti-inflammatory acids and polyethyleneglycol moieties have been attached by labile bonds to oxolinic acid giving pro-drugs with anti-bacterial activities.Some of them are more soluble in water, exhibit a more sustained action in the time and give higher plasma and tissue concentrations compared with the free drug.
- Loubinoux, B,Colin, JL,Thomas, V
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p. 461 - 467
(2007/10/02)
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- Amphiphilic 4-alkoxypolyethoxybenzoates, their preparation and their use
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Nonionic substances which form disk-shaped micelles in aqueous solution and are of the formula STR1 where R is H or STR2 R1 is C1 -C4 alkyl, R2 is H or CH3, x is from 3 to 12 and y is from 3 to 15, and polymers of compounds of the formula I where R is STR3 processes for the preparation of the compounds of the formula I and of the polymers, and the use of the compounds described as additives to detergents and cleaning agents, for other surfactant applications and as liquid crystals for optical, electronic and optoelectronic applications.
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- Neutral Ligands with Surfactant-Type Structure - Synthesis, Complexation, and Ion Transfer
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New lipophilic neutral ligands which combine crown ether and podand characteristics with structural features of surfactants (cf. formulas 1-12, 16-26) were synthesized.Their complexation behaviour was studied, their solid-to-liquid and liquid-to-liquid phase transfer properties as well as their efficiency in ion transport across a liquid model membrane.Crystalline stoichiometric complexes of the cycles 2a-4a and of 3e with NaSCN, Ba(SCN)2, and BaI2 can be isolated.Among the noncyclic representatives a crystalline complex is obtained only from 11 with BaI2.The ligand 8d behaves in aqueous solution as a typical surfactant showing micelle formation and cloud point.
- Weber, Edwin
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p. 770 - 801
(2007/10/02)
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