Structure and Optical Properties in the Solid State of Tetracene Octaesters

Abstract

Tetracene octaesters, which were prepared by two-fold [2+2+2] cocyclization, were isolated as red, orange, and orange-yellow solids for the methyl, ethyl, and propyl ester derivatives, respectively. X-ray crystallographic analysis revealed that there was a large difference in molecular arrangement as well as that the methyl derivative had the shortest intermolecular distance between two tetracene rings, which brought about a red shift compared with other derivatives.