文献类型：期刊文献

英文题名：Electrochromic and electrofluorochromic bifunctional materials for dual-mode devices based on ladder-like polysilsesquioxanes containing triarylamine

作者：Zhang, Wei[1];Niu, Haiying[2];Yang, Caiyu[1];Wang, Yan[1];Lu, Qingyi[1];Zhang, Xu[1];Niu, Haijun[1];Zhao, Ping[3,4];Wang, Wen[5]

机构：[1]Heilongjiang Univ, Sch Chem Chem Engn & Mat, Dept Macromol Sci & Engn, Key Lab Funct Inorgan Mat Chem,Minist Educ, Harbin 150086, Peoples R China;[2]Daxinganlingshiyan Middle Sch, Daxinganlin Dist 16500, Peoples R China;[3]East China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 20037, Peoples R China;[4]East China Univ Sci & Technol, Inst Fine Chem, Shanghai 20037, Peoples R China;[5]Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150080, Peoples R China

年份：2020

卷号：175

外文期刊名：DYES AND PIGMENTS

收录：;EI(收录号：20195207932107);WOS:【SCI-EXPANDED(收录号:WOS:000514214600042)】；

基金：This work was supported by the National Natural Science Foundation of China (51773053); Heilongjiang Province Foundation for Returners from Oversea (LC2018024); Heilongjiang University Graduate Innovation Research Project (YJSCX2019-078HLJU); Innovation and entrepreneurship program for college students (201910212039).

语种：英文

外文关键词：Triarylamine; Ladder-like polysilsesquioxanes; Electrochromic; Electrofluorochromic

摘要：The display devices of the future will tend to be multifunctional, and the dual-mode device for emission and coloration satisfies the requirements of practical applications. We synthesized materials with electrochromic (EC) and electrofluorochromic (EFC) properties through the combination of triarylamine (TAA) and ladder-like polysilsesquioxanes (LPSQs). The ladder-like structure was confirmed by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and Si-29-NMR techniques. These polymers exhibit up to 37.3% fluorescence (PL) quantum efficiency (Phi(PL)) and show strong solid-state fluorescence because TAA groups are effectively isolated in ladder-like backbone in LPSQs. The TAA-LPSQs films exhibit reversible change from colorless of bleached state to blue or green of oxidized state. Among them, the optical contrast of the MPA-LPSQ film synthesized from 1-(4-(bis(4-methoxyphenyl)amino)phenyl)-3-(3-(triethoxysilyl)propyl)urea is as high as 83.0% at 787 nm, which shows excellent cycle stability over 1000 s. Unique structure and good electrochemical activity of TAA-LPSQs make them promising materials for dual-mode device. The EC/EFC device (ECD/EFCD) was assembled using MPA-LPSQ as an active layer which showed good performance. In addition, TAA-LPSQs exhibit excellent sensitivity to 2,4,6-trinitrotoluene (TNT) and 2,4,6-trinitrophenol (TNP) detection, so these materials can also be applied as highly sensitive chemosensor for explosives.