Novel Ladder π-Conjugated Materials-Sila-Pentathienoacenes: Synthesis, Structure, and Electronic Properties
作者:Jun-Hua Wan、Wei-Fen Fang、Zhi-Fang Li、Xu-Qiong Xiao、Zheng Xu、Yuan Deng、Li-Hong Zhang、Jian-Xiong Jiang、Hua-Yu Qiu、Lian-Bin Wu、Guo-Qiao Lai
DOI:10.1002/asia.201000287
日期:——
optical and electrochemical properties shows that the silylene bridge incorporated into the pentathienoacene framework exerts a clear effect on the electronic properties by the σ*–π* conjugation. Although only a slight enhancement is observed for the HOMO levels, with respect to that of pentathienoacene, the LUMO levels are significantly lowered. The observed electronic properties are consistent with the
一系列新颖的梯形π共轭材料-硅戊二乙炔(Si-PTA)进行合成和表征。化合物的晶体结构表明,取代在噻吩环上的烷基链的长度对分子堆积有重要影响。对于具有较短烷基链的化合物,观察到相邻分子之间的界面距离为约3.66Å的致密堆积结构。但是,由于在两个平面之间插入了长烷基链,因此另一种化合物获得了较大的界面距离(7.99Å)。对光学和电化学性质的研究表明,并入五碳杂ac并骨架的亚甲硅烷基桥通过σ* –π *共轭对电子性能产生明显影响。尽管相对于五碳并六苯,HOMO的水平仅观察到了轻微的提高,LUMO水平显着降低。观察到的电子性质与理论计算一致。