Opening two benzene rings on trichalcogenasumanenes toward high performance organic optical-limiting materials†
Abstract
Two flanking benzene rings on trichalcogenasumanenes (1a/1b) were opened upon oxidation, and the successive ring reconstruction afforded donor–acceptor type polycycles containing diimide units (3a/3b). 3a and 3b show excellent optical-limiting properties superior to C60.