Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 13, Issue 23, Pages 11233-11238Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1cp20280d
Keywords
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Funding
- European project: Functional Liquid-Crystalline Elastomers [FULCE-HPRN-CT-2002-00169]
- Ministerio de Ciencia e Innovacion [CTQ-2009-13797]
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Azoderivatives show faster thermal cis-to-trans isomerisation kinetics when they are under the influence of the nematic mean field than dissolved in isotropic solution. The local order parameter induced in the azo-dye by the host mesogen determines the rate of its thermal cis-to-trans isomerisation process. In this way, AZO6-LC mixtures with the same order parameter exhibit identical isomerisation rates independently of the mesogen chemical nature. The temperature dependence of the local order parameter of the chromophore is related with the thermal activation parameters of the isomerisation process and they are characteristic for each AZO6-LC nematic mixture.
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