Synthesis and Structure of Bull’s Horn-Shaped Oligothienoacene with Seven Fused Thiophene Rings

A novel bull’s horn-shaped
oligothienoacene with seven fused
thiophene rings (1) based on dithieno­[2,3-b:2′,3′-d]­thiophene (2) was efficiently synthesized. X-ray diffraction data indicate that 1 possesses an extraordinary compressed sandwich-herringbone
arrangement and shows strong intermolecular S···C and
S···S interactions. In addition, the UV/vis properties,
theoretical calculations, and cyclic voltammetry behaviors of 1 are also described.

以二噻吩并[2,3-b:2′,3′-d]噻吩（dithieno[2,3-b:2′,3′-d]thiophene）(2)为基础，高效合成了一种含七个稠合噻吩环的新型牛角形寡聚噻吩并并苯（1）。X射线衍射（X-ray diffraction）数据表明，化合物1具有极为特殊的压缩型夹心人字形堆积结构，并展现出强烈的分子间S···C与S···S相互作用。此外，本文还对化合物1的紫外-可见（UV/vis）光谱性质、理论计算结果以及循环伏安（cyclic voltammetry）行为进行了阐述。