Donor–Acceptor Conjugated Polymers Based on <i>p</i>- and <i>o</i>-Benzodifuranone and Thiophene Derivatives: Electrochemical Preparation and Optical and Electronic Properties
作者:Kai Zhang、Bernd Tieke、John C. Forgie、Filipe Vilela、Peter J. Skabara
DOI:10.1021/ma202387t
日期:2012.1.24
,2-b:6,5-b′]difuran-2,7-dione using Stille coupling. The polymers exhibit broad absorption bands, and strong donor–acceptor characteristics with very small band gaps (in a range from 0.40 to 1.20 eV). Electrochemically grown polymer thin films exhibit reversible behavior under oxidative and reductive conditions. Under reduction, the polymer films show color changes from dark to almost transparent.
电化学制备了由双-EDOT或双-EDTT单元和对-或邻-二苯基苯并二呋喃酮组成的一系列π共轭聚合物。使用紫外/可见吸收光谱和循环伏安法研究了单体和聚合物。单体由3,4-亚乙基二氧噻吩-2-基或3,4-亚乙基二硫噻吩-2-基三甲基锡烷和3,7-双(4-溴苯基)苯并[1,2- b:4,5- b'合成] difuran-2,6-dione或3,6-双(4-溴苯基)苯并[1,2- b:6,5- b'使用Stille偶联制备] difuran-2,7-dione。聚合物表现出宽的吸收带和强大的供体-受体特性,带隙很小(在0.40至1.20 eV的范围内)。电化学生长的聚合物薄膜在氧化和还原条件下表现出可逆的行为。在还原下,聚合物膜显示出从暗到几乎透明的颜色变化。