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Evaluation of |β| of stilbazolium p-toluenesulfonates by the hyper Rayleigh scattering method

1994; SPIE; Volume: 2143; Linguagem: Inglês

10.1117/12.173833

1996-756X

Xuan-Ming Duan, Shuji Okada, Hachiro Nakanishi, Akira Watanabe, Minoru Matsuda, Koen Clays, André Persoons, Hiro Matsuda,

Liquid Crystal Research Advancements

The hyper Rayleigh scattering (HRS) method was applied to determine the absolute value of second-order hyperpolarizabilities ((beta) ) of stilbazolium p-toluenesulfonates and related ionic species in methanol. In general, the (beta) values of stilbazolium derivatives become large with increasing wavelength of absorption maximum and are 1.1 X 10 -28 - 3.9 X 10 -28 esu, i.e., 3 - 10 times larger than (beta) of p-nitroaniline. By way of exception, halogenated stilbazoliums showed rather larger (beta) compared with the unsubstituted stilbazolium having almost the same absorption cutoff and maximum. The calculated d value of hydroxystilbazolium p-toluenesulfonate obtained using the present (beta) and the known crystal structure agreed well with the experimental d value by the Maker fringe method.