Synthesis of substituted thiophene-benzobisthiazole oligomers for molecular weight: third-order NLO property correlations

Marilyn R. Unroe; Bruce A. Reinhardt

doi:10.1117/12.58119

1 April 1992 Synthesis of substituted thiophene-benzobisthiazole oligomers for molecular weight: third-order NLO property correlations

Marilyn R. Unroe, Bruce A. Reinhardt

Author Affiliations +

Proceedings Volume 1626, Nonlinear Optics III; (1992) https://doi.org/10.1117/12.58119
Event: OE/LASE '92, 1992, Los Angeles, CA, United States

Abstract

In an effort to better understand the relationship between molecular weight and third-order nonlinear optical activity for condensation polymers, a series of oligomeric thiophene containing benzobisthiazoles were synthesized via a trimethylsilylpolyphosphate catalysed condensation of a bis-o-aminothiophenol monomer and a didecyloxythiophene dicarboxylic acid. The physical and chemical characterization of these oligomers, including molecular weight determinations, are summarized. The enhancement of the bulk susceptibility and second molecular hyperpolarizability are demonstrated to increase with increasing oligomer length. Based on the data from femtosecond degenerate four-wave mixing experiments the second hyperpolarizability of the oligomers is enhanced by two-photon resonance.

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Marilyn R. Unroe and Bruce A. Reinhardt "Synthesis of substituted thiophene-benzobisthiazole oligomers for molecular weight: third-order NLO property correlations", Proc. SPIE 1626, Nonlinear Optics III, (1 April 1992); https://doi.org/10.1117/12.58119

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