Liquid crystalline polyacetylenes with tunable luminescent properties

Ben Zhong Tang; Jacky W.Y. Lam; Xiangxing Kong; Fouad Salhi; Kevin K.L. Cheuk; HoiSing Kwok; Yuanming Huang; Weikun Ge

doi:10.1117/12.405325

24 October 2000 Liquid crystalline polyacetylenes with tunable luminescent properties

Ben Zhong Tang, Jacky W.Y. Lam, Xiangxing Kong, Fouad Salhi, Kevin K.L. Cheuk, HoiSing Kwok, Yuanming Huang, Weikun Ge

Proceedings Volume 4107, Liquid Crystals IV; (2000) https://doi.org/10.1117/12.405325
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

Development of advanced polymeric materials with both liquid crystallinity and light emissivity is of scientific interest and technological importance. In this study, we studied light emission from tetrahydrofuran solutions of a liquid crystalline polyacetylene, poly(11-{[(4'-heptoxy-4- biphenylyl)carbonyl]oxy}-1-undecyne), in the electrical field. The field exerts little effect on the photoluminescence of the polymer solution with a low concentration (0.10 mM). The photoluminescence of a concentrated solution (11.3 mM) is, however, noticeably quenched under an electrical field with a field strength of > 300 kV/m. When the field strength is increased to >= 367 kV/m, the bimodal emission spectrum of the solution changes to a monomodal one. Thus, both the emission intensity and spectral profile of the luminescence of the concentrated solution can be tuned by the electrical field, which is probably caused by the aggregate dissociation and mesogen realignment induced by the external stimulus.

Citation Download Citation

Ben Zhong Tang, Jacky W.Y. Lam, Xiangxing Kong, Fouad Salhi, Kevin K.L. Cheuk, HoiSing Kwok, Yuanming Huang, and Weikun Ge "Liquid crystalline polyacetylenes with tunable luminescent properties", Proc. SPIE 4107, Liquid Crystals IV, (24 October 2000); https://doi.org/10.1117/12.405325

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