Solvatochromism and Nonlinear Optical Properties of Donor-acceptor π-Conjugated Molecules

Abstract

We review the theoretical approaches based on the perturbation theory, namely few-states approximations. These approaches are extensively used in the description of the solvent effects on nonlinear response of molecular systems. The connection between the nonlinear optical response and solvatochromic behavior of the donor-acceptor π-conjugated molecules is considered. The general relations between molecular (hyper)polarizabilities and two-photon absorption for the positively and negatively solvatochromic compounds are presented.