Synthesis of poly vinyl ethers with pendant non-linear optical azo dyes

Campbell, David J., Dix, Leslie and Rostron, Paul (1993) Synthesis of poly vinyl ethers with pendant non-linear optical azo dyes. European Polymer Journal, 29 (2-3). pp. 249-253. ISSN 0014 3057

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Abstract

Two vinyl ether polymers with pendant 4′-amino-4-nitroazobenzene dyes were synthesized with different lengths of spacer from the main chain. The synthesis involved polymerization of 2-chloroethylvinyl ether with HI/I 2 to give a polymer of M n 13200 and M w/M n 1.23. The azo-dye molecules were attached to this polymer backbone by a Williamson ether synthesis route using a propyl or hexyl alcohol derivative of the azo dye. High loading of the dyes (> 75%) was achieved as measured by visible spectrophotometry, elemental analysis and 1H-NMR. The polymers exhibit high solubility in a range of solvents and thermal stability up to 200° in air. Liquid crystal (nematic) behaviour is observed for these polymers on cooling from the isotropic melt phase.

Item Type:	Article
Subjects:	F100 Chemistry F200 Materials Science
Department:	Faculties > Health and Life Sciences > Applied Sciences
Depositing User:	Becky Skoyles
Date Deposited:	18 Feb 2015 10:15
Last Modified:	12 Oct 2019 17:29
URI:	http://nrl.northumbria.ac.uk/id/eprint/18656

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