Arching a bay area of triphenyleno[1,12-bcd]thiophene with group 14 functionalities: Synthesis of the first triphenylene derivatives having thiophene and metallafluorene moieties

Arching a bay area of triphenyleno[1,12-bcd]thiophene with group 14 functionalities gave the first triphenylene derivatives whose two pairs of bay carbons are connected by two different heteroatom functionalities. Triphenyleno[1,12-bcd:4,5-b′c′d′]dithiophene, which had been only accessible through the very severe reaction conditions, was synthesized under the mild reaction conditions. Photophysical properties of newly-obtained heterolotriphenylene derivatives are discussed with theoretical calculations.