Diindeno-fusion of an anthracene as a design strategy for stable organic biradicals

Abstract
Biradical polycyclic hydrocarbons are promising materials for organic spintronic and photovoltaic applications. The efficient and scalable synthesis of a diindenoanthracene derivative that exhibits moderate biradical character, yet is remarkably stable towards oxygen and heat, is now reported. A thermally accessible magnetic triplet state was studied through variable temperature techniques.