Donor-acceptor-donor type conjugated polymers for electrochromic applications: benzimidazole as the acceptor unit

被引:64
作者
Akpinar, Hava [1 ]
Balan, Abidin [1 ]
Baran, Derya [1 ]
Unver, Elif Kose [1 ]
Toppare, Levent [1 ]
机构
[1] Middle E Tech Univ, Dept Chem, Dept Biotechnol, Dept Polymer Sci & Technol, TR-06531 Ankara, Turkey
关键词
Benzimidazole; Donor-acceptor approach; Electrochromism; BAND-GAP; ELECTROCHEMICAL PROPERTIES; NEUTRAL STATE; CONDUCTIVITY;
D O I
10.1016/j.polymer.2010.10.045
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Donor-acceptor-donor (DAD) type benzimidazole (Blm) and 3,4 ethylenedioxythiophene (EDOT) bearing monomers were synthesized and electrochemically polymerized. Pendant group at 2-C position of the imidazole ring was functionalized with phenyl (P1), EDOT (P2) and ferrocene (P3) in order to observe substituent effect on electrochemical and electrochromic properties of corresponding polymers. Spectroelectrochemical results showed that different pendant groups resulted in polymers with slightly different optical band gaps (1.75, 1.69 and 1.77 eV respectively) and different number of achievable colored states. Optoelectronic performance and comparison of results with other well known pi-accepting benzazole bearing DAD type polymers were reported in detail. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码:6123 / 6131
页数:9
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