Low Band Gap Cyanovinylene Polymers Based on Ethylenedioxythiophene
Low Band Gap Cyanovinylene Polymers Based on Ethylenedioxythiophene
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DOI：
10.1021/ma971290f
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发表时间：
1998-05
期刊：
影响因子：
5.5
通讯作者：
G. Sotzing;Christopher A. Thomas;J. Reynolds;P. Steel
中科院分区：
文献类型：
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作者：
G. Sotzing;Christopher A. Thomas;J. Reynolds;P. Steel
低带隙 (Eg) 共轭聚合物 1 因其导电形式的高可见光透射率（对于静电荷耗散应用很重要）以及 p 型和 n 型掺杂的能力（允许它们在全聚合物电池、超级电容器和双聚合物电致变色器件 2 中用作阴极和阳极材料）而引起了人们的关注。在该聚合物家族中，聚（3, 4-乙撑二氧噻吩）(PEDOT) 因其光学特性 (Eg) 1.6 eV)、导电状态的高稳定性以及由于其易于氧化而易于进行多个氧化还原开关而脱颖而出。 3 最后一个特性可归因于主链的高有效 HOMO 能级。此前，我们和其他人报道了反式 1, 2-双 (3, 4-乙烯二氧噻吩基)) 亚乙烯基 (BEDOT-V) 的合成和简便电化学聚合。 4 聚 (BEDOT-V) 被发现表现出约 100% 的低半波氧化还原电位 (E1/2, p)。 0.0 V，使其成为稳定的 p 掺杂导体，并且相对于 1.4 eV 的 PEDOT 降低了 Eg。不幸的是，PEDOT 和聚 (BEDOT-V) 的 n 掺杂工艺特别不稳定。已经表明，将氰基结合到富电子聚（双（杂环）亚乙烯基）体系的亚乙烯基单元上可提供具有低 Eg 的聚合物
Low band gap (Eg) conjugated polymers1 have attracted attention due to their high visible light transmissivity in the conducting form (important for static charge dissipation applications) and their ability to be both p-and n-type doped (allowing their use in allpolymer-based batteries, supercapacitors, and dualpolymer electrochromic devices2 as both the cathodic and anodic materials). Within this family of polymers, poly (3, 4-ethylenedioxythiophene)(PEDOT) stands out for its optical properties (Eg) 1.6 eV), high stability in the conducting state, and propensity to multiple redox switches due to its ease of oxidation. 3 This last property can be attributed to the high effective HOMO energy level for the backbone.Previously, we and others have reported the synthesis and facile electrochemical polymerization of trans-1, 2-bis (3, 4-ethylenedioxythienyl)) vinylene (BEDOT-V). 4 Poly (BEDOT-V) was found to exhibit a low half-wave redox potential (E1/2, p) of ca. 0.0 V, making it a stable p-dopable conductor, and a reduced Eg relative to PEDOT of 1.4 eV. Unfortunately, the n-doping process for both PEDOT and poly (BEDOT-V) is particularly unstable. It has been shown that the incorporation of a cyano group onto the vinylene unit of electron rich poly (bis (heterocycle) vinylene) systems affords polymers with low Eg