文献类型：期刊文献

英文题名：Reducing polyazomethine to poly(N-phenylbenzylamine) with near infrared electrochromic, fluorescence and photovoltaic properties

作者：Cai, Jiwei[1]; Zhao, Ping[2]; Niu, Haijun[1]; Lian, Yongfu[1]; Wang, Cheng[1]; Bai, Xuduo[1]; Wang, Wen[3]

机构：[1] Department of Macromolecular Science and Engineering, Ministry of Education, Heilongjiang University, Harbin 150086, China; [2] Key Laboratory for Advanced Materials, Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237, China; [3] School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150080, China

年份：2013

卷号：4

期号：4

起止页码：1183

外文期刊名：Polymer Chemistry

收录：EI(收录号：20130515949692)

语种：英文

外文关键词：Fluorescence - Nuclear magnetic resonance spectroscopy - Electrochromism - Molecular orbitals - Infrared devices - Thermogravimetric analysis - Cyclic voltammetry - Organic polymers

摘要：A novel series of solution-processable near-infrared (NIR) electrochromic aromatic poly(N-phenylbenzylamines) (RPAMs) have been synthesized by the reduction of polyazomethines (PAMs). The RPAMs were characterized by FT-IR and 1H NMR spectroscopy. Thermogravimetric analysis (TGA) showed that all the RPAMs were stable, with 5% weight losses recorded above 353°C in nitrogen atmosphere. All the polymers are readily soluble in common organic solvents such as CHCl3, THF, DMF and DMAc. The RPAMs exhibit a strong blue-green fluorescence with a maximum at 415-514 nm, and the fluorescence quantum yield of RPAM-a in THF is about 18%. The PL intensity and color of the RPAMs changed depending on the value of pH. The highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) energy levels of these polymers were determined in the range of -4.51 - 5.03 and -1.58 - 2.33 eV (vs. the vacuum level) by cyclic voltammetry method consistent with the results of quantum chemical calculation. The polymer films revealed excellent stability of the electrochromic characteristics, with a color change from neutral pale yellowish to a purple doped form at applied potentials ranging from 0.0 to 1.5 V. The RPAMs showed a typical photovoltaic response and the SEM images implied the RPAM would be inclined to self assemble into ball particles. ? 2013 The Royal Society of Chemistry.