Synthesis,liquid crystalline properties and fluorescence of polycatenar 1,3,4‐oxadiazole derivatives |
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| Authors: | Haitao Wang Fenglong Zhang Binglian Bai Peng Zhang Jianhua Shi Dingyi Yu |
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| Institution: | 1. Key Laboratory of Automobile Materials (MOE) &2. College of Materials Science and Engineering , Jilin University , Changchun, 130012, People's Republic of China;3. State Key Laboratory for Supramolecular Structure and Materials &4. College of Chemistry , Jilin University , Changchun, 130012, People's Republic of China |
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| Abstract: | A series of hexacatenar liquid crystals containing the 1,3,4‐oxadiazole group as rigid core, i.e. 1,4‐bis(3,4,5‐trialkoxyphenyl)‐1,3,4‐oxadiazolyl]‐ benzene (P‐P‐oxd‐n), were designed and synthesised. Based on a detailed study of their thermotropic phase behaviour and mesophase structures, it was revealed that columnar phases are generated in these materials. Furthermore, combination of experimental and calculated results enabled a proposal for the molecular packing in the mesophase. The photoluminescent properties of these materials were examined using P‐P‐oxd‐8 as an example. A strong blue light emission (λmax = 456 nm) was observed in P‐P‐oxd‐8 and a higher quantum yield was obtained in dilute chloroform solution. |
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| Keywords: | polycatenar liquid crystals columnar mesophase fluorescence 1 3 4‐oxadiazole derivatives |
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