Liquid crystalline light-emitting thermally stable readily processable substituted polyacetylenes

Ben Zhong Tang; Jacky W.Y. Lam; Jingdong Luo; Yuping Dong; Kevin K.L. Cheuk; Zhiliang Xie; HoiSing Kwok

doi:10.1117/12.449942

11 December 2001 Liquid crystalline light-emitting thermally stable readily processable substituted polyacetylenes

Ben Zhong Tang, Jacky W.Y. Lam, Jingdong Luo, Yuping Dong, Kevin K.L. Cheuk, Zhiliang Xie, HoiSing Kwok

Proceedings Volume 4463, Liquid Crystals V; (2001) https://doi.org/10.1117/12.449942
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

Mesomorphic and luminescent poly(propiolates) with different skeleton structures (-{(R)CequalsC[CO₂(CH₂)₆OCO-Biph- OC₇H₁₅]}_n-; R equals H (1), CH₃ (2), C₆H₅ (3), Biph equals biphenylyl} are synthesized. The backbone absorption in 2 and 3 are weak but upon photoexcitation, the polymers emit strong violet light of 369 nm, whose intensities are higher than that from poly(l-phenyl-l-octyne), a well-known highly-fluorescent polyacetylene. The main chain of 3 absorbs strongly at 380 nm, and the polymer is completely nonluminescent. All the polymers are thermally stable and form enantiotropic monolayer SmA phase, with 1 adopting well-ordered packing arrangements.

Citation Download Citation

Ben Zhong Tang, Jacky W.Y. Lam, Jingdong Luo, Yuping Dong, Kevin K.L. Cheuk, Zhiliang Xie, and HoiSing Kwok "Liquid crystalline light-emitting thermally stable readily processable substituted polyacetylenes", Proc. SPIE 4463, Liquid Crystals V, (11 December 2001); https://doi.org/10.1117/12.449942

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