Zero-phonon lines and electron-phonon coupling of charge transfer triplet states: Naphthalene-TCPA

Two different kinds of triplet trap systems in naphthalene-TCPA single crystals show very different electron-phonon coupling parameters. It is argued that this phenomenon is due to the different magnitude of charge transfer in the excited state; this assumption is supported by a model calculation based on a Coulombic excited state interaction. © 1979.