Abstract
The synthesis and first hyperpolarizabilities (β) of various donor-acceptor substituted thiophene containing compounds with extended conjugation are reported. Results indicate that replacing phenyl rings with less aromatic thiophene moieties enhances the second-order hyperpolarizability. Incorporating the acceptor group, N,N’ diethylthiobarbituric acid, that can gain aromaticity upon charge-separation has also led to an increase in the nonlinearity. Some of the molecules have been incorporated into poIy(methyl methacrylate) and the electro-optic coefficients of these host-guest polymers were measured.
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Acknowledgments
The work in this paper was performed, in part, by the Center for Space Microelectronics Technology, Jet Propulsion Laboratory, California Institute of Technology and was sponsored by the Ballistic Missile Defense 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 (AFOSR) through agreements with the National Aeronautics and Space Administration (NASA). Support from the Beckman Institute, the National Science Foundation (Grant CHE-9106689) and AFOSR (Grant F49620-1-0314 and AASERT Grant F49626-J-0278) is also gratefully acknowledged. SG thanks the National Research Council (NRC) and the NASA for an NRC Resident Research Associateship at the Jet Propulsion Laboratory.
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Gilmour, S., Jen, A.KY., Marder, S.R. et al. Second-Order Nonlinear Optical Properties Of Thiophene Containing Chromophores with Extended Conjugation. MRS Online Proceedings Library 328, 485–490 (1993). https://doi.org/10.1557/PROC-328-485
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DOI: https://doi.org/10.1557/PROC-328-485