A. Painelli et F. Terenziani, Solvent and vibrational effects on linear and non-linear spectral properties of push-pull chromophores, SYNTH METAL, 109(1-3), 2000, pp. 229-233
The two-state model for push-pull chromophores is extended to self-consiste
ntly account for the coupling of electrons to molecular vibrations and for
the interaction with the solvent. The exact solution of this model proves t
hat sum over states (SOS) expansions of NLO responses and standard approach
es to spectral properties fail for highly non-linear systems like push-pull
chromophores. Alternative approaches are discussed. (C) 2000 Elsevier Scie
nce S.A. All rights reserved.