Phosphole modified pentathienoacene: Synthesis, electronic properties and self-assembly
作者:Jun-Hua Wan、Wei-Fen Fang、Yi-Bao Li、Xu-Qiong Xiao、Li-Hong Zhang、Zheng Xu、Jia-Jian Peng、Guo-Qiao Lai
DOI:10.1039/c1ob06584j
日期:——
A series of new ladder π-conjugated materials, phosphole modified pentathienoacene (PO-PTA), are synthesized and characterized. Single-crystal X-ray results demonstrate that methyl-disubstituted PO-PTA forms a face-to-face dimer structure driven by π–π interactions. The investigations of optical properties showed that the oxidized phosphole moiety in this ladder system can effectively narrow the band gap. PO-PTA is a promising building block in π-conjugated polymers and oligomers for optoelectronic applications. The derivative of PO-PTA, obtained by introducing four long alkyl chains, can self-assemble into one-dimensional (1D) fibers based on intermolecular π–π interactions, dipole–dipole interactions and van der Waals interactions. Interestingly, the uniform and well-ordered monolayers were also obtained for PO-PTA derivative on a HOPG (highly oriented pyrolytic graphite) surface.
一系列新的π共轭梯形材料——磷杂戊二烯(PO-PTA)被合成并进行了表征。单晶X射线结果表明,甲基双取代的PO-PTA在π-π相互作用的作用下形成面对面的二聚体结构。光学性质的研究表明,该梯形体系中的氧化磷杂部分可以有效缩小带隙。PO-PTA是π共轭聚合物和寡聚物中用于光电子应用的有前途的构建模块。通过引入四个长烷基链获得的PO-PTA衍生物,可以基于分子间π-π相互作用、偶极-偶极相互作用和范德华相互作用自组装成一维(1D)纤维。有趣的是,在HOPG(高取向热解石墨)表面上,PO-PTA衍生物也可以形成均匀有序的单分子层。