jo6b00238_si_001.pdf (972.05 kB)
Low Band Gap Coplanar Conjugated Molecules Featuring Dynamic Intramolecular Lewis Acid–Base Coordination
journal contribution
posted on 2016-04-20, 00:00 authored by Congzhi Zhu, Zi-Hao Guo, Anthony
U. Mu, Yi Liu, Steven E. Wheeler, Lei FangLadder-type
conjugated molecules with a low band gap and low LUMO
level were synthesized through an N-directed borylation reaction of
pyrazine-derived donor–acceptor–donor precursors. The
intramolecular boron–nitrogen coordination bonds played a key
role in rendering the rigid and coplanar conformation of these molecules
and their corresponding electronic structures. Experimental investigation
and theoretical simulation revealed the dynamic nature of such coordination,
which allowed for active manipulation of the optical properties of
these molecules by using competing Lewis basic solvents.