Novel red-light-emitting 9,10-bis(phenylethynyl)anthracenes

Abstract

Novel 9,10-bis(phenylethynyl)anthracenes (BPEA's) 5 were prepared in high yields and purity. They were synthesized by a Pd-catalyzed Sonogashira coupling reaction. These compounds are typical intramolecular charge transfer compounds, which consist of the electron-rich anthracene moiety and an electron acceptor part. Their emissions are all in the red region with λmax ranging between 616-638 nm and they exhibit high fluorescent quantum efficiencies.