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10 October 1997 Photophysics and nonlinear optical behavior of a,w dithienyl polyenes
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The absorption and emission spectroscopy and nonlinear optical absorption of a series of a,o-dithienyl polyenes were studied in chloroform and n-octane solutions. Dithienyl polyenes containing butyl substituents were also studied. Steady state fluorescence, time resolved emission, fluorescence lifetime and quantum yield measurements were made. The fluorescence quantum yields were significantly lower than those of the corresponding a,w-diphenyl polyenes. Among the dithienyl polyenes, 3,3'-substituted polyenes exhibited stronger fluorescence than those of the 2,2'-substituted. Nonlinear optical absorption experiments showed evidence of two photon absorption. In some polyenes, two photon absorption was followed by excited state absorption.
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Lalgudi V. Natarajan, Richard L. Sutherland, Paul A. Fleitz, Laura A. Sowards, and Charles W. Spangler "Photophysics and nonlinear optical behavior of a,w dithienyl polyenes", Proc. SPIE 3146, Nonlinear Optical Liquids and Power Limiters, (10 October 1997);

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