M. Del Zoppo et al., Intramolecular charge delocalization and nonlinear optical properties fromvibrational spectra, SYNTH METAL, 102(1-3), 1999, pp. 1582-1583
The vibrational method for the evaluation of molecular hyperpolarizabilitie
s of polyconjugated molecules is used in order to account for the modulatio
n of second order hyperpolarizability (gamma) induced by the effect of char
ge delocalization.