Alcohol-Responsive, Hydrogen-Bonded, Cholesteric Liquid-Crystal Networks
Alcohol-Responsive, Hydrogen-Bonded, Cholesteric Liquid-Crystal Networks
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DOI：
10.1002/adfm.201200362
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发表时间：
2012-07-10
影响因子：
19
通讯作者：
Kuo, Hui-Lung
中科院分区：
文献类型：
--
作者：
Chang, Chin-Kai;Bastiaansen, Cees M. W.;Kuo, Hui-Lung
采用氢桥连液晶（CLC）聚合物网络作为光学传感器材料来区分乙醇和甲醇。通过打破氢桥和之前去除的非反应性液晶剂产生的结合孔隙率，促进了醇类的快速吸收。醇之间的区别是基于乙醇和甲醇与氢桥连CLC聚合物网络的分子亲和力的多样性。CLC网络是基于分子螺旋的一维带隙材料，在光谱的可见部分具有取决于分子螺旋的节距的离散反射带。CLC网络的反射带位置的变化准确地区分了酒精类型，并提供了它们混合时的比例信息。
Hydrogen-bridged, cholesteric liquid-crystal (CLC) polymer networks are adopted as an optical sensor material to distinguish between ethanol and methanol. Fast uptake of the alcohols is facilitated by an incorporated porosity created by breaking the hydrogen bridges and by a previously removed non-reactive liquid-crystal agent. The discrimination between the alcohols is based on the diversity in molecular affinity of ethanol and methanol with the hydrogen-bridged CLC polymer networks. The CLC networks are molecular-helix-based, one-dimensional bandgap materials with a discrete reflection band in the visible part of the spectrum that depends on the pitch of the molecular helix. The changes in positions of the reflection bands of the CLC network accurately discriminate between the alcohol types and provide information on their ratio in case they are blended.