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Proceedings Paper

Liquid crystalline polyacetylenes with tunable luminescent properties
Author(s): Ben Zhong Tang; Jacky W.Y. Lam; Xiangxing Kong; Fouad Salhi; Kevin K.L. Cheuk; HoiSing Kwok; Yuanming Huang; Weikun Ge
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Paper 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.

Paper Details

Date Published: 24 October 2000
PDF: 7 pages
Proc. SPIE 4107, Liquid Crystals IV, (24 October 2000); doi: 10.1117/12.405325
Show Author Affiliations
Ben Zhong Tang, Hong Kong Univ. of Science and Technology (Hong Kong)
Jacky W.Y. Lam, Hong Kong Univ. of Science and Technology (Hong Kong)
Xiangxing Kong, Hong Kong Univ. of Science and Technology (Hong Kong)
Fouad Salhi, Hong Kong Univ. of Science and Technology (Hong Kong)
Kevin K.L. Cheuk, Hong Kong Univ. of Science and Technology (Hong Kong)
HoiSing Kwok, Hong Kong Univ. of Science and Technology (Hong Kong)
Yuanming Huang, Hong Kong Univ. of Science and Technology (Hong Kong)
Weikun Ge, Hong Kong Univ. of Science and Technology (Hong Kong)


Published in SPIE Proceedings Vol. 4107:
Liquid Crystals IV
Iam-Choon Khoo, Editor(s)

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