Journal of the Chemical Society. Faraday Transactions vol:93 issue:17 pages:3039-3044
The hyperpolarizability beta of an ionic species, 1-anilinonaphthalene-8-sulfonic acid ammonium salt (ANS), was determined in various solvents by the Hyper-Rayleigh scattering (HRS) technique. Increase in the solvent polarity led to a decrease in the hyperpolarizability; i.e. beta = 37.4 +/- 2.5 x 10(-30) esu in p-dioxane and beta = 10.3 +/- 1.3 x 10(-30) esu in water. The solvent effect was explained by considering the dissociation ratio of the sulfonic acid ammonium group in solution, which influences the intramolecular donor-acceptor interaction between phenylamino and sulfonic acid ammonium groups.