CONFIGURATION-INTERACTION AND THE THEORY OF ELECTRONIC FACTORS IN ENERGY-TRANSFER AND MOLECULAR EXCITON INTERACTIONS

The theory established in J. Chem. Phys. 101, 10521 (1994), for electr onic factors which promote interchromophore electronic energy transfer , exciton interactions and which provide the stabilization of excimers , is extended; first so as to include the possible contribution of dou bly excited configurations. It is ascertained that there is a resultan t effect upon the (interchromophore orbital overlap-dependent) through -configuration interaction, and a significant correction to the simple expression obtained previously for the Coulombic interaction. These C I effects are admitted to the general theory of the previous work and the cases of nonidentical, identical, and orthogonal donor and accepto r are discussed. Second, a description of superexchange effects is adm itted to the theory. Two possible formalisms are developed and discuss ed. (C) 1996 American Institute of Physics.