Structural Tracking of a Bimolecular Reaction in Solution by Time- Resolved X-Ray Scattering

摘要

Every photochemical reaction starts with an electronically excited state and ends with a ground-state molecule. This is also true in bimolecular photoreactions, in which the excited molecule collides with a ground-state reactant. The collision complex may follow a potential energy surface directly to the primary ground-state product. The reaction may also proceed on an excited-state surface and reach a stable minimum configuration. This excited complex-an exciplex-is anticipated to precede the primary product of many types of bimolecular photoreactions, most prominently in photoin-duced electron-transfer reactions.