作者:Masahiko Iyoda、Mika Imamura、Hideyuki Shimizu、Jun Yamakawa、Hiroyuki Otani、Tohru Nishinaga
DOI:10.3987/com-16-s(s)29
日期:——
pi-Expanded macrocyclic oligothiophene 12-mer E,E-12T10A, 18-mer E,E,E-18T15A, and 24-mer E,E,E,E-24T20A composed of thienylene, ethynylene, and vinylene moieties were synthesized in good total yield by the McMurry coupling reaction of dialdehyde 1. E,E-12T10A was converted to cyclo[12](3,4-dibutyl-2,5-thienylene-ethynylene) 12T12A in 20% yield by bromination-dehydrobromination procedure. Furthermore, the synthesis of 12T12A was carried out by using double elimination procedure starting from the sulfone dianion 2(2-) and dialdehyde 1. The crystal structure of E,E-12T10A was determined by X-ray analysis. In the solid state, macrocyclic oligothiophenes formed nanostructured polymorphs such as single crystals, petal-shaped structure, and chained lumps depending on the ring size.