A series of novel donorâacceptor systems, consisting of head-to-tail coupled oligo(3-hexylthiophene)s covalently linked to perylenemonoimide, is described. These hybrid molecules, which differ by the length of the oligothiophene units from a monothiophene up to an octathiophene, were created via effective palladium-catalyzed Negishi and Suzuki cross-coupling reactions in good to excellent yields. The optical and electrochemical properties of these compounds were determined and based on this series structureâproperty relationships have been established which give vital information for the fabrication of photovoltaic devices. Because the synthesized perylenylâoligothiophenes distinguish themselves by a high absorption between 300 and 550 nm and an almost complete fluorescence quenching of the perylene acceptor, they meet the requirements for organic solar cells.
一系列新型供体-受体系统,由头对头耦合的
3-己基噻吩寡聚物与
芘单
酰亚胺共价连接而成,被详细描述。这些混合分子因
噻吩单元长度不同,从一
噻吩至八
噻吩,通过高效
钯催化的Negishi和Suzuki交叉偶联反应在良好至极佳的产率下成功合成。这些化合物的光学和电
化学特性已被测定,并基于这一系列结构-性质关系得以建立,为光伏器件的制造提供了关键信息。由于合成的
芘基-
噻吩寡聚物在300至550纳米之间具有高吸收能力,且
芘受体的荧光几乎完全猝灭,它们满足了有机太阳能电池的要求。