Charge-Transport-Induced Dissociation in Donor-Bridge-Acceptor Complexes
Written by Daria Brisker-Klaiman
Possible mechanisms for charge-transport-induced dissociation in donor-bridge-acceptor complexes are studied. Two mechanisms for dissociation at the molecular bridge are captured within a simple model of an anharmonic bridge vibration coupled non-linearly to an electronic degree of freedom. A direct mechanism is associated with vibronic excitations to the nuclear continuum and an alternative dissociation mechanism involves intermediate quasi-bound vibrational states (Feshbach resonances). The two different mechanisms of charge-transport-induced dissociation are analyzed and their interplay as a function of the systems parameters is examined. A parameter regime is suggested where the phenomenon should be experimentally accessible.