Molecular First Hyperpolarizabilities of a New Class of Asymmetric Squaraine Dyes

Abstract

The molecular first hyperpolarizabilities (β) of a series of asymmetric squaraine dyes have been measured by electric-field-induced second harmonic generation; the dyes have negative β-values whose magnitudes are comparable to 4-N,N-dimethylamino-4′-nitrostilbene (DANS).

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© 1994 Royal Society of Chemistry. Received, 1st September 1993; Com. 3/05245A. This work was performed, in part, by the Center for Space Microelectronics Technology, Jet Propulsion Laboratory (JPL), California Institute of Technology and was sponsored by the Ballistic Missiles Defence Organization, Innovative Science and Technology Office and The Advanced Research Projects Agency through grant # 91-NC-146 administered by the Air Force Office of Scientific Research through agreements with NASA. Support at the Beckman Institute from the National Science Foundation (Grant No. CHE 9106689) is gratefully acknowledged. We thank Professor Anthanv Garito for helpful discussions.

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