Institut de Nanociència i Nanotecnologia, Departament de Química Orgànica, Facultat de Química, Universitat de Barcelona, Barcelona, Spain.
Phys Chem Chem Phys. 2011 Jun 21;13(23):11233-8. doi: 10.1039/c1cp20280d. Epub 2011 May 13.
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.
偶氮衍生物在向列平均场的影响下比在各向同性溶液中显示出更快的热顺式-反式异构化动力学。介晶主体诱导偶氮染料的局部有序参数决定了其热顺式-反式异构化过程的速率。通过这种方式，具有相同有序参数的 AZO6-LC 混合物表现出相同的异构化速率，而与介晶化学性质无关。发色团局部有序参数的温度依赖性与异构化过程的热激活参数有关，并且每个 AZO6-LC 向列混合物都具有特征性。
