- Fluxional Pd(II) NHC complexes - Synthesis, structure elucidation and catalytic studies
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Four catalytically relevant Pd(II) complexes involving N-heterocyclic carbenes (NHCs) and bidentate N- and P-donor ligands were synthesized and characterized. The structures and conformations of the complexes were elucidated on the basis of combination of
- Dangalov, Miroslav,Stoyanova, Malinka,Petrov, Petar,Putala, Martin,Vassilev, Nikolay G.
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Read Online
- Naphthalimide Aryl Sulfide Derivative Norrish Type i Photoinitiators with Excellent Stability to Sunlight under Near-UV LED
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A series of Norrish type I photoinitiators (NASs), which are naphthalimide aryl sulfide derivatives, are prepared. The potential mechanism involved in the photolysis of NASs under UV LED at 405 nm is investigated by steady-state photolysis, nuclear magnet
- Yu, Jia,Gao, Yanjing,Jiang, Shengling,Sun, Fang
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Read Online
- Palladium-Catalyzed Cyclization: Regioselectivity and Structure of Arene-Fused C60 Derivatives
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The palladium-catalyzed cyclization on the fullerene C60 cage has been achieved using several aryl halides and C60. This reaction was found to be accelerated by the addition of pivalic acid, which can be rationally explained by the c
- Hashikawa, Yoshifumi,Murata, Michihisa,Wakamiya, Atsushi,Murata, Yasujiro
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- Electro-mediated PhotoRedox Catalysis for Selective C(sp3)–O Cleavages of Phosphinated Alcohols to Carbanions
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We report a novel example of electro-mediated photoredox catalysis (e-PRC) in the reductive cleavage of C(sp3)?O bonds of phosphinated alcohols to alkyl carbanions. As well as deoxygenations, olefinations are reported which are E-selective and can be made Z-selective in a tandem reduction/photosensitization process where both steps are photoelectrochemically promoted. Spectroscopy, computation, and catalyst structural variations reveal that our new naphthalene monoimide-type catalyst allows for an intimate dispersive precomplexation of its radical anion form with the phosphinate substrate, facilitating a reactivity-determining C(sp3)?O cleavage. Surprisingly and in contrast to previously reported photoexcited radical anion chemistries, our conditions tolerate aryl chlorides/bromides and do not give rise to Birch-type reductions.
- Barham, Joshua P.,K?nig, Burkhard,Karl, Tobias A.,Reiter, Sebastian,Tian, Xianhai,Yakubov, Shahboz,de Vivie-Riedle, Regina
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supporting information
p. 20817 - 20825
(2021/08/18)
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- Anomalous Halogen-Halogen Interaction Assists Radial Chromophoric Assembly
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The design of highly efficient supramolecular architectures that mimic competent natural systems requires a comprehensive knowledge of noncovalent interactions. Halogen bonding is an excellent noncovalent interaction that forms halogen-halogen (X2) as well as trihalogen interacting synthons. Herein, we report the first observation of a symmetric radial assembly of chromophores (R3c space group) composed of a stable hexabromine interacting synthon (Br6) that further push the limits of our understanding on the nature, role, and potential of noncovalent halogen bonding. Contrary to the destabilization proposed for Type-I X2 interactions, Br6-synthon-possessing Type-I X2 interactions exhibit a stabilizing nature owing to the exchange-correlation component. The radial assembly of chromophores is further strengthened by intermolecular through-space charge transfer interaction. Br6-synthon-driven 3-fold symmetric radial assembly render a lattice structure that reminisces the chromophoric arrangement in the light harvesting system 2 of purple bacteria.
- Niyas,Ramakrishnan, Remya,Vijay, Vishnu,Sebastian, Ebin,Hariharan, Mahesh
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supporting information
p. 4536 - 4540
(2019/02/26)
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- Naphthalimide aromatic sulfide photoinitiator for UV-LED photocuring and preparation method and application thereof
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The invention discloses a naphthalimide aromatic sulfide photoinitiator for UV-LED photocuring and relates to the field of light-sensing polymers. The photoinitiator herein is provided based on the problem that an existing photoinitiator has poor initiati
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Paragraph 0069; 0073
(2019/03/24)
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- Suitable for UV - LED light curing of the naphthalimide aryl benzyl [...] photoinitiator and preparation method and application
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The invention discloses a suitable for UV - LED light curing of the naphthalimide aryl benzyl [...] photoinitiators, relates to a photosensitive polymer field, based on the existing light initiator in UV - LED under irradiation of light source caused by t
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Paragraph 0012; 0032; 0036
(2019/03/25)
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- Synthesis of Perylene Imide Diones as Platforms for the Development of Pyrazine Based Organic Semiconductors
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There is a great interest in peryleneimide (PI)-containing compounds given their unique combination of good electron accepting ability, high abosorption in the visible region, and outstanding chemical, thermal, and photochemical stabilities. Thus, herein we report the synthesis of perylene imide derivatives endowed with a 1,2-diketone functionality (PIDs) as efficient intermediates to easily access peryleneimide (PI)-containing organic semiconductors with enhanced absorption cross-section for the design of tunable semiconductor organic materials. Three processable organic molecular semiconductors containing thiophene and terthiophene moieties, PITa, PITb, and PITT, have been prepared from the novel PIDs. The tendency of these semiconductors for molecular aggregation have been investigated by NMR spectroscopy and supported by quantum chemical calculations. 2D NMR experiments and theoretical calculations point to an antiparallel π-stacking interaction as the most stable conformation in the aggregates. Investigation of the optical and electrochemical properties of the materials is also reported and analyzed in combination with DFT calculations. Although the derivatives presented here show modest electron mobilities of ~10-4 cm2V-1s-1, these preliminary studies of their performance in organic field effect transistors (OFETs) indicate the potential of these new building blocks as n-type semiconductors.
- De Echegaray, Paula,Manche?o, María J.,Arrechea-Marcos, Iratxe,Juárez, Rafael,López-Espejo, Guzmán,López Navarrete, J. Teodomiro,Ramos, María Mar,Seoane, Carlos,Ortiz, Rocío Ponce,Segura, José L.
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p. 11256 - 11267
(2016/11/28)
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- The synthesis and aggregation-induced near-infrared emission of terrylenediimide-tetraphenylethene dyads
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We design and synthesize terrylenediimide-tetraphenylethene dyads, which exhibit featured aggregation-induced near-infrared fluorescence with a maximum emission wavelength of up to 800 nm.
- Xie, Nuo-Hua,Li, Chong,Liu, Jun-Xia,Gong, Wen-Liang,Tang, Ben Zhong,Li, Guigen,Zhu, Ming-Qiang
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supporting information
p. 5808 - 5811
(2016/05/19)
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- Substituent effect on quantum efficiency in 4-aryloxy-N-(2′,6′- diisopropylphenyl)-1,8-naphthalimides: Experimental and computational investigations
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A series of potential optical brightening agents - 4-aryloxy-N-(2′, 6′-diisopropylphenyl)-1,8-naphthalimides - are synthesized and their photo-physical properties are experimentally determined. Interestingly, it is found that their quantum efficiencies or
- Choppawa, Tianchai,Sukwattanasinitt, Mongkol,Sahasithiwat, Somboon,Ruangpornvisuti, Vithaya,Rashatasakhon, Paitoon
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p. 175 - 180
(2014/06/23)
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- New soluble near-infrared dyes based on terrylene diimides with four aromatic heterocycles
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Terrylene diimides with four aromatic heterocycles (AHTDIs) were synthesized under Stille Cross-coupling conditions and fully characterized by NMR and mass spectrometry. The aggregation of the terrylene diimide (TDI) was suppressed by four heterocycles substituents on the bay region, and these AHTDIs exhibited good solubility in common organic solvents. The effects of the substituted groups on the optical and electrochemical properties were also investigated. The introduction of four aromatic heterocycles on the bay of TDI resulted in significant red-shifts of the absorption peak (100 nm), corresponding to a decrease in the band gap from 1.82 to 1.50 eV. Furthermore, with four rich electron aromatic heterocycles, the AHTDIs showed 280 mV negative-shifts of first oxidation potentials and a new oxidation wave, corresponding to an increase in the HOMO levels from?-5.60 to?-5.28 eV. Two soluble NIR dyes based on terrylene diimides were synthesized by the introduction of aromatic heterocycles substituents on the bay region. The effects of the substituted groups on the optical and electrochemical properties were further investigated. Copyright
- Wei, Huimin,Jiang, Nan,Zhao, Nan,Zhang, Ying,Gao, Baoxiang
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supporting information
p. 356 - 360
(2014/05/20)
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- Direct monitoring of self-assembly of copolymeric micelles by a luminescent molecular rotor
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The detailed analysis of the time resolved luminescence of a specifically designed fluorescent molecular rotor enables the direct monitoring of the self-assembly of a poly(N,N-dimethylacrylamide)-block-polystyrene (PDMA-b-PS) copolymer into core-corona nanoparticles. Comparison with bulk PS indicates hard confinement of the micelle core, due to the solvation of the hydrophilic PDMA corona. The Royal Society of Chemistry 2013.
- Vaccaro, Gianfranco,Bianchi, Alberto,Mauri, Michele,Bonetti, Simone,Meinardi, Francesco,Sanguineti, Alessandro,Simonutti, Roberto,Beverina, Luca
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supporting information
p. 8474 - 8476
(2013/09/23)
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- Energy transfer at the single-molecule level: Synthesis of a donor-acceptor dyad from perylene and terrylene diimides
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In 2004, we reported single-pair fluorescence resonance energy transfer (spFRET), based on a perylene diimide (PDI) and terrylene diimide (TDI) dyad (1) that was bridged by a rigid substituted para-terphenyl spacer. Since then, several further single-mole
- Kim, Ha Na,Puhl, Larissa,Nolde, Fabian,Li, Chen,Chen, Long,Basche, Thomas,Muellen, Klaus
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p. 9160 - 9166
(2013/07/26)
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- Toward the development of the direct and selective detection of nitrates by a bioinspired Mo-Cu system
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The development of a new platform for the direct and selective detection of nitrates is described. Two thioether-based chemosensors and the corresponding sulfoxides and sulfones were prepared, and their photophysical properties were evaluated. Upon select
- Marom, Hanit,Popowski, Yanay,Antonov, Svetlana,Gozin, Michael
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supporting information; experimental part
p. 5532 - 5535
(2012/01/03)
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- FLUORESCENT BRIGHTENERS, METHODS OF PREPARATION THEREOF, FLUORESCENT BRIGHTENER COMPOSITIONS, AND METHODS OF PREPARATION AND USES THEREOF
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A compound of Formula (I) wherein R1, R2, and R3 are independently at each occurrence hydrogen, a halogen, a cyano functionality, a C1-C20 aliphatic functionality, a C3-C10 cyclo
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Page/Page column 9
(2011/04/18)
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- The synthesis of azaperylene-9,10-dicarboximides
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The syntheses of two azaperylene 9,10-dicarboximides are presented. 1-Aza- and 1,6-diazaperylene 9,10-dicarboximides containing a 2,6-diisopropylphenyl substituent at the N-imide position were synthesized in two steps starting from naphthalene and isoquin
- Andrew, Trisha L.,Vanveller, Brett,Swager, Timothy M.
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supporting information; experimental part
p. 3045 - 3048
(2011/02/25)
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- USE OF 4-CYANO-NAPHTHALENE-1, 8-DICARBOXIMIDE DERIVATIVES AND RELATED COMPOUNDS TO PROTECT ORGANIC MATERIAL FROM THE DAMAGING EFFECTS OF LIGHT
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A description is given of the use of naphthalene-1,8-dicarboxylic monoimides of the formula (I), in which R1 is hydrogen, alkyl, alkenyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl or heteroaryl and R2 is a radical containing a
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Page/Page column 66-67
(2008/06/13)
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