2,5-Di(2-pyridyl)phospholes: model compounds for the engineering of π-conjugated donor–acceptor co-oligomers with a chemically tunable HOMO–LUMO gap

Abstract

2,5-Di(2-pyridyl)phospholes possess an extended π-conjugated system with a charge transfer structure; high yielding chemical modifications involving the phosphorus atom allow fine tuning of the HOMO–LUMO gap.