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Synthesis and Characterization of Polythiophenes Bearing Diphenyl Groups in the Conjugated Chain

Journal of Wuhan University of Technology(Materials Science) 2015年第3期30卷 568-573页

作者：周勇刘福德 WU Haiyan QU Boyang DUAN Lijie Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion School of Chemistry & Chemical Engineering Tianjin University of Technology

4,4＇-dibromo-2-nitro-biphenyl and 4,4＇-dibromo-2,3＇-dinitro-biphenyl have been synthesized via nitration reaction with 4,4＇-dibromobiphenyl as the raw material. Three novel thiophene derivatives, 4, 4＇-di（4-hexyl-thiophen-2-yl）biphenyl, 4,4＇-di（4-hexyl-thiophen-2-yl）-2- nitro-biphenyl and 4,4＇-di（4- hexyl-thiophen-2-yl）-2,3＇-dinitrobiphenyl were synthesized through stille coupling reaction, followed by polymerization in the presence of FeC13, respectively. UV-vis absorption spectra, fluorescence spectra, photoluminescence spectra and electrochemical properties of the polymers were investigated. And the band-gap （Eg）, HOMO orbital energy （EHCMO）, and LUMO orbital energy （EUJMO） of the polymers were calculated. Among the polymers, polymer PBTN and PBTD show lower band-gap （2.67 and 2.63 eV）, lower HOMO energy level （-5.38 and -5.4 eV） and broader wavelength （432 and 438 nm） than that of polymer PBTB （2.69 eV, -5.36 eV and 424 nm） with incorporation of one nitro group or two nitro groups in the main chain, respectively.

关键词： polythiophene biphenyl nitro group stille coupling reaction

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Photocatalytic stille Cross-coupling on Gold/g-C3N4 Nano-heterojunction

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Chemical Research in Chinese Universities 2020年第6期36卷 1013-1016页

作者： YU Qiuying LIN Xiu LI Xinhao CHEN Jiesheng School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversiryShanghai 200240P.R.China

Heterogeneous catalysts have been developed for C-C coupling reactions,but stand low activity and always proceed under harsh *** stille cross-coupling reaction as a green catalytic method for C-C bond formation is of great interest for a wide range of scientists but still lacks stable and highly efficient ***,we have designed an Au nanoparticle-graphitic carbon nitride heterojunction as an outstanding photocatalyst for artificial photosynthesis in stille cross-coupling *** interface effect between metal and *** makes electron rectify and prevents the recombination of electron-hole ***,the efficiency of Au nanoparticle catalysts could be adjusted by gold *** the turnover frequency(TOF)value reached the highest level of 788 h l over the optimal heterojunction *** importantly,the C-C bond formation reaction has been proved to be carried out well under visible light irradiation,indicating the low-cost organic synthesis pro *** analysis confirmed the stability and general application of our heterogeneous Au nano-heterojunctior catalyst.

关键词： Photocatalysis stille coupling reaction Green chemistry Interface effect

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Facile synthesis and characterization of a novel thiophene-fused polycyclic aromatics based on pyrene

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Chinese Chemical Letters 2011年第7期22卷 819-822页

作者： Daiki Hoshino Tsuyoshi Morita Yasushiro Nishioka College of Science and Technology Nihon UniversityNarashinodaiFunabashiChiba 2748501Japan

A novel large thiophene-fused polycyclic aromatics 1 based on pyrene 5 has been synthesized, and its structure was confirmed by ^1H NMR, ^13C NMR, MS, UV-vis and elemental analysis. The key steps of the synthesis involved the stille cross-coupling reaction and followed by selective β-β oxidative cyclization of pendant thienyl rings by FeCl3 under mild conditions.

关键词： Pyrene Thiophene stille coupling reaction Oxidative cyclization

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