Conducting tetraaniline derivatives with fast switching time, enhanced contrast and coloration efficiency

被引：24

作者：

Cao, Linyu ^{[1
]}

Gong, Chen ^{[1
]}

Yang, Jiping ^{[1
]}

机构：

[1] Beihang Univ, Sch Mat Sci & Engn, Key Lab Aerosp Adv Mat & Performance, Minist Educ, Beijing 100191, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2016年 / 192卷

基金：

中国国家自然科学基金;

关键词：

tetraaniline derivative; electrochromism; substituent; star-shaped architecture; POLY(3,4-ALKYLENEDIOXYTHIOPHENE) DERIVATIVES; NANOSTRUCTURED POLYANILINE; FILMS; PERFORMANCE; COPOLYMERS; BLOCK; OLIGOANILINES; STABILITY; DEVICES;

D O I：

10.1016/j.electacta.2016.02.016

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Pristine tetraaniline and three carboxyl-substituted tetraaniline derivatives, that is, tetraaniline ((Ani) 4), carboxyl-capped tetraaniline ((Ani)(4)-COOH), amino/carboxyl-capped tetraaniline (NH2-(Ani)(4)-COOH) and carboxyl-capped star-shaped tetraaniline (Tri-(Ani)(4)-COOH) were synthesized, and the influence of substituent and molecular architecture on their electrochromic properties was investigated. Pristine (Ani)(4) shows lowest electrochromic properties while the carboxyl-capped star-shaped Tri-(Ani)(4)-COOH possesses the best electrochromic properties with fast bleaching and coloring times of 2.04 s and 1.90 s, respectively, promising optical contrast of 74.2%, and improved coloration efficiency of 133.31 cm(2)C(-1) at 750 nm. This enhanced electrochromic performance can be attributed to the introduction of carboxyl substituent and star-shaped molecular architecture, which are able to improve the interchain charge movement, electron movement between films and substrate and enhanced ion diffusion resulting from loosely packed molecular structure of films, and confirmed by cyclic voltammetry and atomic force microscope results, implying the introduction of special substituent and molecular architecture is an effective strategy to improve the electrochromic properties of aniline oligomers. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：422 / 430

页数：9

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