In this present work, an exceptionally specific and selective chemosensor (Z)-5-((pyren-1-ylmethylene)amino)-1,3,4thiadiazole-2-thiol (PCAT), has been designed and synthesized via simplest synthetic route. The synthesized probe is successfully portrayed by utilizing 1H, 13C NMR, ESI-MS techniques. The PCAT probe indicates colour changes which can be seen through naked-eye from colourless to pink and fluorescence turn-on response specifically towards Pb2+ ions with the possible contending metal ions. The binding stoichiometric proportion has been found as 1:1 from the Job’s plot investigation. The detection limit for PCAT-Pb2+ ions is found to be 7.15×10-8 M. Besides, the real sample analysis is also done with the collected ecological water samples and has resulted in an excellent recovery percentage.

中文翻译：

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Pb2+ 离子的简单荧光开启识别涉及芘-噻二唑化学传感器探针

在目前的工作中，通过最简单的合成路线设计并合成了一种特别特异性和选择性的化学传感器 (Z)-5-((pyren-1-ylmethylene)amino)-1,3,4thiadiazole-2-thiol (PCAT) . 利用 1H、13C NMR、ESI-MS 技术成功地描绘了合成的探针。PCAT 探针指示颜色变化，可以通过肉眼看到从无色到粉红色和荧光开启响应，特别是针对 Pb2+ 离子和可能的竞争金属离子。从乔布斯的情节调查中发现结合化学计量比为 1:1。PCAT-Pb2+ 离子的检测限为 7.15×10-8 M。此外，还对采集的生态水样进行了实际样品分析，得到了极好的回收率。