ABSTRACT
Abstract The dispersion interactions are dominant in nonpolar solutions; they determine spectral shifts of the electronic absorption bands. The contribution of the dispersion forces can be separated from the total spectral shift recorded in a given solvent in the case of solute molecules with great differences between their polarizabilities in the electronic states participating to the electronic transitions. In this chapter, we discuss the procedure used for obtaining information about the dispersive interactions in some solutions in order to estimate the molecular polarizability in the electronic excited states. This kind of information is useful in quantum mechanical chemistry of the excited molecular states.
