Shvetsov Sergey A, Emelyanenko Alexander V, Boiko Natalia I, Zolot'ko Alexander S, Zhang Yan-Song, Liu Jui-Hsiang, Khokhlov Alexei R
M.V. Lomonosov Moscow State University, Moscow, 119991, Russia.
P.N. Lebedev Physical Institute, Moscow, 119991, Russia.
Beilstein J Nanotechnol. 2018 Mar 13;9:870-879. doi: 10.3762/bjnano.9.81. eCollection 2018.
Two sequential transformations of the orientational structure in nematic liquid crystal droplets containing a dendrimer additive (nanosized macromolecules with light-absorbing azobenzene terminal moieties) under light irradiation in the UV-blue spectral range were investigated. The origin of these transitions is in the change of the boundary conditions due to photoisomerization of the dendrimer adsorbed onto the liquid crystal-glycerol interface. It was shown that the photoisomerization processes of dendrimer molecules in a liquid crystal are accompanied by a spatial rearrangement of their azobenzene moieties, which is the key point in the explanation of the observed effects.
研究了在紫外-蓝光光谱范围内光照下，含有树枝状大分子添加剂（具有吸光偶氮苯末端基团的纳米级大分子）的向列型液晶液滴中取向结构的两个连续转变。这些转变的起源在于吸附在液晶-甘油界面上的树枝状大分子的光异构化导致边界条件的变化。结果表明，液晶中树枝状大分子分子的光异构化过程伴随着其偶氮苯基团的空间重排，这是解释所观察到的效应的关键点。
