Electropolymers of 4-(thieno[3,2-b]thiophen-3-yl)benzonitrile extended with thiophene, 3-hexylthiophene and EDOT moieties; their electrochromic applications
作者:Ilknur Demirtas、Erdal Ertas、Sebahat Topal、Turan Ozturk
DOI:10.1016/j.polymer.2021.124286
日期:2021.11
onitrile based monomers having thiophene, 3-hexylthiophene and EDOT at the peripherals were synthesized. Their electropolymerization produced the corresponding electroactive polymers, P1, P2, and P3, which exhibited electrochromic properties with color developments from red to blue, orange-yellow to pale-blue, and purple to pale-grey, respectively. Functional design of the monomers with electron deficient
合成了三种新的π-共轭4-(噻吩并[3,2 - b ]噻吩-3-基)苄腈基单体,其外围具有噻吩、3-己基噻吩和EDOT。它们的电聚合产生了相应的电活性聚合物P1、P2和P3,它们表现出电致变色特性,颜色分别从红色到蓝色、橙黄色到淡蓝色和紫色到淡灰色。噻吩并[3,2- b]位带缺电子苯甲腈单体的功能设计]噻吩(TT)和外围的富电子噻吩基影响 HOMO 和 LUMO 能级,从而降低共轭聚合物的带隙。考虑到文献中基于电聚合的 TT 聚合物的带隙,通过电聚合获得的聚合物P3 的带隙为 1.73 eV。对于P1/ PProDOP、P2 /PProDOP 和P3 /PProDOP,新聚合物的电致变色器件 (ECD) 显示出不同的光学对比度 (ΔT%),分别为 507 nm 处 20%、443 nm 处 25% 和 579 nm 处 34%。分别。此外,它们的漂白切换时间为 1.2-1.7 秒,着色为 0