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(Chemical Science) A calamitic mesogenic near-infrared absorbing croconaine dye/liquid crystalline elastomer composite  
(Chemical Science) A calamitic mesogenic near-infrared absorbing croconaine dye/liquid crystalline elastomer composite
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关键词: liquid  crystal  elastomer  
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所属学科: 功能高分子
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简介:
In this work, we report the first example of a calamitic mesogenic near-infrared (NIR) absorbing organic dye, made by functionalizing a thiophene–croconaine chromophore rigid core with two symmetric long flexible alkyl chains. The liquid crystal (LC) NIR dye YHD796 exhibits a sharp and intense NIR absorption band with a maximum absorption peak at 796 nm. Taking advantage of the improved solubility of YHD796 dispersed in mesogenic molecules, a homogeneously-aligned mono-domain liquid crystalline elastomer (LCE)/YHD796 composite film is successfully prepared by applying the classical LC-cell-alignment method and in situ photo-polymerization of photocurable LC monomer mixtures. This LCE/YHD796 composite film performs a fully reversible contraction/expansion response towards NIR light stimulus due to the photothermal heating effect induced by the YHD796 dye well-dispersed in the LCE matrix.
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上传时间: 2016-07-09 23:01:27
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