Revisiting indeno[2,1-<i>c</i>]fluorene synthesis while exploring the fully conjugated <i>s</i>-indaceno[2,1-<i>c</i>:6,5-<i>c</i>′]difluorene

Abstract

Described herein is an alternative synthetic approach for conjugated indeno[2,1-c]fluorene, including the experimental and theoretical investigations of a tetraradicaloid s-indaceno[2,1-c:6,5-c']difluorene that belongs to the rarely explored indacenodifluorene family containing 4n + 2 monocyclic conjugated π-electrons. Expedient synthesis, broad absorption reaching 1150 nm, and small HOMO-LUMO energy gap make [2,1-c:6,5-c']s-IDF a promising candidate for optoelectronic applications.

Topics & Concepts