In this work, we report the design of novel fluorophores that bear three benzothiadiazole and benzoselenadiazole groups, respectively, for sensitive detection of trimethyl arsine vapor. In particular, the fluorophore with the benzoselenadiazole groups can form stronger chalcogen bonding with trimethyl arsine than the fluorophore with the benzothiadiazole groups, which in turn triggers much faster and more sensitive fluorescence responses. On the basis of this novel mechanism, fluorescence detection of trimethyl arsine vapor with rapid response (∼3 s), high sensitivity (the theoretical LOD is 0.44 ppb), and high selectivity is achieved on bundled nanofibers from the fluorophore with the benzoselenadiazole groups. Here, the new fluorescence sensor may find wide applications in health and environmental monitoring, arsenic distribution recognition in soil, and arsenic mines exploration.

中文翻译：

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开发具有增强的非正统硫属元素键合的荧光团，用于三甲基胂蒸气的高灵敏度检测

在这项工作中，我们报告了分别带有三个苯并噻二唑和苯并硒二唑基团的新型荧光团的设计，用于灵敏检测三甲基胂蒸气。特别是，具有苯并硒二唑基团的荧光团可以与三甲基胂形成比具有苯并噻二唑基团的荧光团更强的硫属元素键合，进而触发更快、更灵敏的荧光响应。基于这种新机制，三甲基胂蒸气的荧光检测具有快速响应（~3 s）、高灵敏度（理论 LOD 为 0.44 ppb）和高选择性，在来自具有苯并硒二唑基团的荧光团的纳米纤维上实现。在这里，新的荧光传感器可能会在健康和环境监测中找到广泛的应用，