Tetra-EDOT substituted 3D electrochromic polymers with lower band gaps  

作　　者：Jingjing Shi Imran Murtaza Shan Shao Xiaosi Zhu Yang Zhao Mengmeng Zhu Osamu Goto Hong Meng 

机构地区：[1]School of Advanced Materials,Peking University Shenzhen Graduate School [2]Key Laboratory of Flexible Electronics & Institute of Advanced Materials,Jiangsu National Synergetic Innovation Center for Advanced Materials,Nanjing Tech University [3]Department of Physics,International Islamic University

出　　处：《Science China Chemistry》2017年第1期90-98,共9页中国科学（化学英文版）

基　　金：the Shenzhen Key Laboratory of Organic Optoelectromagnetic Functional Materials of Shenzhen Science and Technology Plan(ZDSYS20140509094114164);the Shenzhen Peacock Program(KQTD2014062714543296);Shenzhen Science and Technology Research Grant(JCYJ20140509093817690);the Nanshan Innovation Agency Grant(KC2015ZDYF0016A);the Guangdong Key Research Project(2014B090914003,2015B090914002);the Guangdong Talents Project,the National Basic Research Program of China(2015CB856505);the National Natural Science Foundation of China(51373075);the Guangdong Academician Workstation(2013B090400016);the Natural Science Foundation of Guangdong Province(2014A030313800)

摘　　要：A couple of novel electrochromic materials poly(2,3,4,5-tetrakis(2,3-hydrothieno[3,4-b]dixin-5-yl)-1-methyl-1H-pyrrole)(P(t-EDOT-mPy))and poly(5,5',5",5'"-(thiophene-2,3,4,5-tetrayl)tetrakis(2,3-dihydrothieno[3,4-b][1,4]dioxine))(P(t-EDOTTh))are electrodeposited via multi-position polymerization of their tetra-EDOT substituted monomers t-EDOT-mPy and t-EDOT-Th,respectively.Compared with the linear 2D structured poly(thiophene)(E_g=2.2 eV)and poly(2,5-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)thiophene)(E_g=1.7eV),P(t-EDOT-Th)(E_g=1.62eV)has the lowest band gap.Hence,we speculate that the band gaps of the two polymers,having 3D structures,are decreased in contrast to non-substituted polymers or bi-EDOT substituted polymers,thiophene and 1-methyl-1H-pyrrole.The results indicated that P(t-EDOT-Th)thin films are more stable and show higher transmittance amid two polymers,which may find their utilization in organic optoelectronics.A couple of novel electrochromic materials poly（2,3,4,5-tetrakis（2,3-hydrothieno[3,4-b]dixin-5-yl）-1-methyl-1H-pyrrole）（P（t-EDOT-mPy））and poly（5,5＇,5＂,5＇＂-（thiophene-2,3,4,5-tetrayl）tetrakis（2,3-dihydrothieno[3,4-b][1,4]dioxine））（P（t-EDOTTh））are electrodeposited via multi-position polymerization of their tetra-EDOT substituted monomers t-EDOT-mPy and t-EDOT-Th,respectively.Compared with the linear 2D structured poly（thiophene）（Eg=2.2 eV）and poly（2,5-bis（2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl）thiophene）（Eg=1.7eV）,P（t-EDOT-Th）（Eg=1.62eV）has the lowest band gap.Hence,we speculate that the band gaps of the two polymers,having 3D structures,are decreased in contrast to non-substituted polymers or bi-EDOT substituted polymers,thiophene and 1-methyl-1H-pyrrole.The results indicated that P（t-EDOT-Th）thin films are more stable and show higher transmittance amid two polymers,which may find their utilization in organic optoelectronics.

关 键 词：conjugated 3D polymers electrochromic POLYTHIOPHENE POLYPYRROLE EDOT low band gap ELECTROCHEMISTRY 

分 类 号：O631[理学—高分子化学]