Synthesis of Diarylthiobarbituric acid Chromophores with Enhanced Second-order Optical Nonlinearities and Thermal Stability
In summary, the compounds reported here demonstrate that it is possible to design chromophores that simultaneously exhibit large nonlinearity and good thermal stability. Furthermore, with the synthesis of bis(4-hydroxyphenyl)thiobarbituric acid, we believe that it should be possible to covalently incorporate these and other rather nonlinear chromophores into poled polymers at high concentrations. Experiments to test this hypothesis are in progress.
© 1994 American Chemical Society. Received June 8, 1994. The research described in this paper was performed in part by the Jet Propulsion Laboratory, California Institute of Technology, as part of its Center for Space Microelectronics Technology and was supported by the Advanced Research Projects Agency (administered by the Air Force Office of Scientific Research) and the Ballistic Missile Defense Initiative Organization, Innovative Science and Technology Office, through a contract with the National Aeronautics and Space Administration (NASA). Support from the National Science Foundation (Grants CHE-9106689 and DMR-9107806) as well as AFOSR (Grant F-496-209310311 and Contract F49620910270) is gratefully acknowledged. S.G. thanks the National Research Council and NASA for a Resident Research Associateship at JPL. We thank Kevin Drost for preparation of diphenylthiobarbituric acid and Paul Cahill and Bob Twieg for helpful discussions.
Supplemental Material - cm00046a007_si_001.pdf