State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, People's Republic of China.
J Fluoresc. 2012 May;22(3):945-51. doi: 10.1007/s10895-011-1033-x. Epub 2012 Jan 7.
Detection of Hg(2+) in complex natural environmental conditions is extremely challenging, and no entirely successful methods currently exist. Here we report an easy-to-prepare fluorescent sensor B3 with 2-aminophenol as Hg(2+) receptor, which exhibits selective fluorescence enhancement toward Hg(2+) over other metal ions. Especially, the fluorescence enhancement was unaffected by anions and cations existing in environment and organism. Moreover, B3 can detect Hg(2+) in sulphide-rich environments without cysteine, S(2-) or EDTA altering the fluorescence intensity. Consequently, B3 is capable of distinguishing between safe and toxic levels of Hg(2+) in more complicated natural water systems with detection limit ≤2 ppb.
在复杂的自然环境条件下检测 Hg(2+)极具挑战性，目前尚无完全成功的方法。在这里，我们报告了一种易于制备的荧光传感器 B3，它以 2-氨基酚作为 Hg(2+)受体，对 Hg(2+)表现出选择性的荧光增强，而对其他金属离子则没有。特别是，荧光增强不受环境和生物体内存在的阴离子和阳离子的影响。此外，B3 可以在富含硫的环境中检测 Hg(2+)，而无需半胱氨酸、S(2-)或 EDTA 改变荧光强度。因此，B3 能够在更复杂的天然水系统中区分安全和有毒水平的 Hg(2+)，检测限≤2 ppb。
