当前位置：
X-MOL 学术
›
Angew. Chem. Int. Ed.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Redox‐Triggered Orientational Responses of Liquid Crystals to Chlorine Gas
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2018-07-09 , DOI: 10.1002/anie.201803194 Tibor Szilvási 1 , Nanqi Bao 1 , Karthik Nayani 1 , Huaizhe Yu 1 , Prabin Rai 2 , Robert J. Twieg 2 , Manos Mavrikakis 1 , Nicholas L. Abbott 1
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2018-07-09 , DOI: 10.1002/anie.201803194 Tibor Szilvási 1 , Nanqi Bao 1 , Karthik Nayani 1 , Huaizhe Yu 1 , Prabin Rai 2 , Robert J. Twieg 2 , Manos Mavrikakis 1 , Nicholas L. Abbott 1
Affiliation
|
Surface‐supported liquid crystals (LCs) that exhibit orientational and thus optical responses upon exposure to ppb concentrations of Cl2 gas are reported. Computations identified Mn cations as candidate surface binding sites that undergo redox‐triggered changes in the strength of binding to nitrogen‐based LCs upon exposure to Cl2 gas. Guided by these predictions, μm‐thick films of nitrile‐ or pyridine‐containing LCs were prepared on surfaces decorated with Mn2+ binding sites as perchlorate salts. Following exposure to Cl2, formation of Mn4+ (in the form of MnO2 microparticles) was confirmed and an accompanying change in the orientation and optical appearance of the supported LC films was measured. In unoptimized systems, the LC orientational transitions provided the sensitivity and response times needed for monitoring human exposure to Cl2 gas. The response was also selective to Cl2 over other oxidizing agents such as air or NO2 and other chemical targets such as organophosphonates.
中文翻译：
液晶对氯气的氧化还原触发取向响应
据报道，表面支撑的液晶（LC）在暴露于ppb浓度的Cl 2气体时会表现出取向性和光学响应。计算结果表明，Mn阳离子是候选的表面结合位点，当暴露于Cl 2气体时，这些结合位点会发生氧化还原触发的与氮基LC的结合强度变化。在这些预测的指导下，在装饰有Mn 2+结合位点作为高氯酸盐的表面上制备了微米厚的含腈或吡啶的LC薄膜。暴露于Cl 2之后，形成Mn 4+（以MnO 2的形式确认），并测量了所支撑的LC膜的取向和光学外观的伴随变化。在未优化的系统中，LC取向转变可提供监测人类暴露于Cl 2气体所需的灵敏度和响应时间。与其他氧化剂（例如空气或NO 2）和其他化学目标（例如有机膦酸酯）相比，该反应对Cl 2也是选择性的。
更新日期：2018-07-09
中文翻译：
液晶对氯气的氧化还原触发取向响应
据报道，表面支撑的液晶（LC）在暴露于ppb浓度的Cl 2气体时会表现出取向性和光学响应。计算结果表明，Mn阳离子是候选的表面结合位点，当暴露于Cl 2气体时，这些结合位点会发生氧化还原触发的与氮基LC的结合强度变化。在这些预测的指导下，在装饰有Mn 2+结合位点作为高氯酸盐的表面上制备了微米厚的含腈或吡啶的LC薄膜。暴露于Cl 2之后，形成Mn 4+（以MnO 2的形式确认），并测量了所支撑的LC膜的取向和光学外观的伴随变化。在未优化的系统中，LC取向转变可提供监测人类暴露于Cl 2气体所需的灵敏度和响应时间。与其他氧化剂（例如空气或NO 2）和其他化学目标（例如有机膦酸酯）相比，该反应对Cl 2也是选择性的。
京公网安备 11010802027423号