A Facile Strategy to Achieve Large Triplet Gap Based on Excited-State Aromaticity-tunable Five-memebered Ring

Abstract

We have proposed a facile strategy\nto achieve large triple gap by manipulating the aromaticity and the transition\nproperties of the low-lying excited states, then theoretically designed and\nexperimentally verified a series of donor-bridge-acceptor based on partially\nconjugated five-membered rings with high aromaticity in T1 state to meet the\nharsh energy conditions required for hot\nexciton materials and for singlet fission materials.