Highly solvatochromic emission of electron donor–acceptor compounds containing propanedioato boron electron acceptors
Abstract
Light-induced electron transfer occurs in bifunctional compounds consisting of 1,3-diphenylpropanedioato boron oxalate or fluoride electron acceptors and simple aromatic electron-donor groups, linked by a methylene bridge; fluorescence from the highly polar charge-transfer excited state is remarkably efficient and shows an exceptionally large solvatochromicity.