A dual signaling reaction-based probe derived from a hybrid coumarin-benzopyrylium dye was developed for Hg²⁺ signaling. The probe exhibited selective colorimetric Hg²⁺ signaling via the Hg²⁺-induced thiosemicarbazide-oxadiazole transformation. Interference from Cu²⁺ ions was successfully circumvented using a citrate buffer as a masking agent. The detection limit for Hg²⁺ ions was found to be 1.88 × 10^–7 M. Practical application to Hg²⁺ detection in simulated wastewater was realized using a typical smartphone as a stand-alone data capture and data processing device.

中文翻译：

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通过香豆素-苯并吡啶染料的硫代氨基脲到恶二唑的比色法测定Hg ²⁺

开发了一种基于双信号反应的探针，该探针衍生自杂香豆素-苯并吡啶染料，用于Hg ²⁺信号传导。该探针通过Hg ²⁺诱导的硫代氨基脲-恶二唑转化表现出选择性的比色Hg ²⁺信号传导。使用柠檬酸盐缓冲液作为掩蔽剂成功地避免了来自Cu ²⁺离子的干扰。发现Hg ²⁺离子的检出限为1.88×10 ^–7M。使用典型的智能手机作为独立的数据捕获和数据处理设备，可以在模拟废水中检测Hg ^2+的实际应用。