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Solvent dependence of the second order hyperpolarizability in p-nitroaniline

✍ Scribed by M. Stähelin; D.M. Burland; J.E. Rice

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
362 KB
Volume
191
Category
Article
ISSN
0009-2614

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✦ Synopsis

Values of the second order hyperpolarizability fl have been determined for p-nitroaniline (PNA) in solvents of varying polarity using the electric field induced second harmonic generation experimental technique. An observed solvent dependence offlo, the second order hyperpolarizability extrapolated to zero-frequency, is correlated with the solvent-induced shift of the PNA charge transfer absorption maximum ).max. The correlation is similar to the correlation between 2m~ and flo observed in donor/acceptor p-substituted benzenes with different substituents. Both dependences can be understood within the framework of a simple four level Hiickel model.

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