Abstract A highly selective thiourea-naphthol based fluorescent chemosensor SC ((E)-2-((8-hydroxy-2,3,6,7-tetrahydro-1H,5H-pyrido[3,2,1-ij] quinolin-9-yl) methylene)-N-(naphthalen-1-yl) hydrazine-1-carbothioamide) for sensing In3+ was developed. Sensor SC could detect In3+ by a fluorescent turn-on method in aqueous solution. The detection limit of SC for In3+ is calculated to be 9.62 μM. In addition, sensor SC successfully functioned as a visible fluorescent test kit for detecting In3+, and quantification of In3+ was also successful in real water samples with satisfactory recovery. Sensing mechanism of SC towards In3+ was identified by fluorescent and UV–vis titrations, FT-IR, NMR titration, ESI-MS and theoretical calculations.

中文翻译：

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一种用于检测In3+的硫脲-萘酚基荧光传感器及其应用

摘要 一种高选择性硫脲-萘酚荧光化学传感器 SC ((E)-2-((8-hydroxy-2,3,6,7-tetrahydro-1H,5H-pyrido[3,2,1-ij] quinolin-开发了用于感应 In3+ 的 9-yl) 亚甲基)-N-(naphthalen-1-yl) hydrazine-1-carbothioamide)。传感器 SC 可以通过荧光开启方法检测水溶液中的 In3+。In3+ 的 SC 检测限计算为 9.62 μM。此外，传感器 SC 成功用作检测 In3+ 的可见荧光测试套件，并且 In3+ 的定量在实际水样中也成功并具有令人满意的回收率。通过荧光和紫外-可见滴定、FT-IR、NMR 滴定、ESI-MS 和理论计算确定了 SC 对 In3+ 的传感机制。