10 October 1997 Investigation of the solvent effect on the hyperpolarizability-structure relationship of optically nonlinear organic molecules
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Abstract
The characterization of organic materials for their nonlinear optical properties involves the use of samples in the liquid phase. The most convenient way to prepare samples for such investigations at room temperature is to dissolve the materials in a suitable solvent. However, the influence of the solvent on the measurements may depend on the physical and chemical properties of both the solvent and the solute. If the solvent effect is not properly taken into account in relating measured macroscopic quantities to the microscopic properties of solute molecules, the comparison of the experimental results of hyperpolarizabilities with the theoretical predictions may be invalid. In this study, a set of molecules with different sizes of conjugated ir-electron structure designed in a systematic order was used to investigate the structure-property relationship and its dependence on the environment using solvents of varying polarity. The materials used include vanillin Schiff's base derivatives. Experimental techniques such as electric field induced second harmonic generation, hyper-Rayleigh scattering and solvatochromic method were employed in this study.
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Mohan Sanghadasa, Thomas A. Barr, Kamala N. Bhat, Benjamin G. Penn, Ronald D. Clark, "Investigation of the solvent effect on the hyperpolarizability-structure relationship of optically nonlinear organic molecules", Proc. SPIE 3146, Nonlinear Optical Liquids and Power Limiters, (10 October 1997); doi: 10.1117/12.284167; https://doi.org/10.1117/12.284167
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