Theory of solvent effects on electronic absorption spectra of rodlike or disklike solute molecules: Frequency shifts

A theory, which has been advanced by the author and his co-workers, for frequency shifts of electronic absorption spectra of a nonpolar rodlike molecule in dilute nonpolar and polar solutions is extended so that it is applicable to a polar rodlike solute molecule and a nonpolar or polar disklike solute molecule. The theory takes into account higher-order multipole moments (in addition to a dipole) of the solute molecule, and its solution-phase polarizabilities are properly taken into account. Furthermore, it explains how the dispersive interaction is altered by the presence of permanent dipoles of the solvent. (C) 1997 American Institute of Physics.