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1 December 1991 Synthesis and nonlinear optical activity of cumulenes
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We report our continuing investigations of the cumulenes, a novel class of compounds proposed for use as the active second- and third-order nonlinear optical component materials for electro-optic and all-optical devices. Unlike conjugated organic nonlinear optical molecules based on alternating multiple and single bonds, these molecules contain a contiguous, or `cumulated' system of double bonds, leading to a highly rigid one-dimensional backbone of polarizable (pi) -electrons. A series of symmetrically- and asymmetrically-substituted tetraphenyl cumulenes has been synthesized and characterized. Direct-current electric field- induced second harmonic generation experiments show significant second-order nonlinear susceptibilities in a series of polar cumulenes. These experiments have been performed at 1.9 micrometers to avoid dispersion effects. Thermogravimetric analysis indicates survival of a butatriene to 300 degree(s)C.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Susan P. Ermer, Steven M. Lovejoy, Doris S. Leung, Ronnie C. Spitzer, Glenn A. Hansen, and Richard J. Stone "Synthesis and nonlinear optical activity of cumulenes", Proc. SPIE 1560, Nonlinear Optical Properties of Organic Materials IV, (1 December 1991);

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