Structures and properties of Saturn-like complexes composed of oligothiophene macrocycle with methano60fullerene and 70fullerene

摘要

pi-Expanded oligothienylene macrocycle with a large inner cavity incorporates fullerenes such as methano60 fullerene (C61H2) and 70 fullerene (C-70) inside to form Saturn-like complexes. Although the oligothiophene macrocycle weakly interacts with fullerenes in solution, it forms stable Saturn-like fullerene complexes in the solid state. X-ray analysis of the Saturn-like complexes exhibited short contacts between the sulfur atoms of the oligothiophene macrocycle and fullerene carbons, which hinder the rotation of fullerenes. As a result, the non-covalent interaction between the oligothiophene macrocycle and fullerenes was employed in crystal structure determination of fullerenes. UV-vis-NIR spectra of the Saturn-like complexes showed weak donor-acceptor interaction between the oligothiophene macrocycle and fullerenes.