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Ordering of Single Conjugated Polymers in a Nematic Liquid Crystal Host

机译:向列型液晶主体中单个共轭聚合物的排序

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摘要

We describe molecule-by-molecule observations,using single molecule fluorescence spectroscopy,of the ordering of the components in a nematic phase formed by a binary mixture of short and long rods.A stiff conjugated polymer,MEH-PPV(poly[2-methoxy-5-((2-ethylhexyl)oxy)-l,4-phenylenevinylene]),present at very low concentrations in a binary nematic-nematic phase with the mesogen 5CB(4-n-pentyl-4'-cyanobiphenyl)is investigated.We observe near-perfect orientational order of the stiff,rodlike conjugated polymers translating through a planar nematic phase.This represents striking experimental evidence for the predicted enhanced alignment of long rods in the nematic phase of a binary mixture of rods.
机译:我们使用单分子荧光光谱技术逐个分子地描述了由短棒和长棒的二元混合物形成的向列相中各组分的顺序。刚性共轭聚合物,MEH-PPV(聚[2-甲氧基研究了-5((2-乙基己基)氧基)-1,4-亚苯基亚乙烯基],以非常低的浓度与液晶元5CB(4-n-戊基-4'-氰基联苯)以二元向列向列相存在我们观察到刚性,棒状共轭聚合物通过平面向列相平移的接近完美的取向顺序,这代表了惊人的实验证据,证明了长棒在二元混合物的向列相中预计的增强排列。

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