A novel 1,3-diazepine based fluorescent probe for Hg has been successfully synthesized and characterized. Comprising a furan and pyridine, the probe L1 is a blue-emitting 1,3-diazepine derivative, which transforms into an imine form with high fluorescent yellow-emitting under alkaline conditions. Fluorescence quench of the probe in ethanol was observed with the addition of Hg aqueous in the presence and absence of other metal ions, with a visible color change from colorless to yellow, and this fluorescence quench can be observed in a wide pH range of 3–11. An important feature for this probe is its high selectivity towards mercury ions for the aqueous-phase detection of Hg over the other competitive metal ions, making the “naked-eye” detection of mercury ions possible.

中文翻译：

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一种新型 1,3-二氮杂卓荧光探针，用于高选择性检测 Hg2+


一种新型的基于 1,3-二氮杂卓的 Hg 荧光探针已成功合成并表征。探针L1由呋喃和吡啶组成，是一种发蓝光的1,3-二氮杂卓衍生物，在碱性条件下转变成亚胺形式，发出高黄色荧光。在存在和不存在其他金属离子的情况下，通过添加 Hg 水溶液，观察到探针在乙醇中的荧光猝灭，颜色从无色变为黄色，并且这种荧光猝灭可以在 3–3 的宽 pH 范围内观察到。 11.该探针的一个重要特点是，与其他竞争性金属离子相比，它对汞离子的水相检测汞离子具有高选择性，使得“肉眼”检测汞离子成为可能。