Langmuir–Blodgett (LB) thin films were prepared using an N,N′-bis(L-alanine tert-butylester)-3,4:9,10-perylene diimide derivative to determine the optimum thin film forming conditions and their sensing properties towards volatile organic vapors. Our results showed that highly uniform LB films could be transferred onto gold substrates and were highly sensitive to dichloromethane and chloroform vapors with a high response and short recovery time. Structure–function relationships suggest that hydrogen bonding between the perylene diimide and the vapor molecules plays a significant role in determining the performance of perylene diimide sensing devices. Diffusion processes were investigated using Fick's second law. The diffusion of dichloromethane and chloroform vapors into the LB film structure yielded larger responses than other vapors. The interactions were reversible, and purging caused the vapor molecules to escape from the LB films.

中文翻译：

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N，N'-双（L-丙氨酸叔丁酯）-3,4：9,10-per二酰亚胺分子，用于挥发性有机蒸气检测

朗缪尔-布洛杰特（LB）使用制备的薄膜Ñ，Ñ双（大号丙氨酸叔-丁基酯）-3,4：9,10-per二酰亚胺衍生物，以确定最佳的薄膜形成条件及其对挥发性有机蒸气的传感特性。我们的结果表明，高度均匀的LB膜可以转移到金基底上，并且对二氯甲烷和氯仿蒸气高度敏感，响应速度快，恢复时间短。结构与功能的关系表明，the二酰亚胺和蒸气分子之间的氢键在确定per二酰亚胺传感装置的性能中起着重要作用。使用菲克第二定律研究扩散过程。二氯甲烷和氯仿蒸气向LB膜结构的扩散比其他蒸气产生更大的响应。相互作用是可逆的，