一种用于高灵敏度和选择性检测Hg(2+)和Cu(2+)的简单席夫碱荧光探针。
A simple Schiff base fluorescence probe for highly sensitive and selective detection of Hg(2+)and Cu(2.).
作者信息
Zhang Caihong, Gao Baozhen, Zhang Qingyan, Zhang Guomei, Shuang Shaomin, Dong Chuan
机构信息
School of Chemistry and Chemical Engineering, Center of Environmental Science Research, Shanxi University, Taiyuan 030006, PR China.
School of Chemistry and Chemical Engineering, Center of Environmental Science Research, Shanxi University, Taiyuan 030006, PR China.
出版信息
Talanta. 2016 Jul 1;154:278-83. doi: 10.1016/j.talanta.2016.03.067. Epub 2016 Mar 23.
A new Schiff base fluorescent probe, 2-(4-(diphenylamine)benzylidene) thiosemicarbazide (DPBT), was synthesized and its sensing behavior to metal ions were studied by UV-vis and fluorescence spectra. The results show that DPBT can detect Hg(2+)sensitively and selectively in weakly acidic and neutral conditions, they form a complex with 2:1. The linear range was 0.095-1.14µM and the detection limit was 0.15nM. In weakly alkaline conditions, DPBT can interaction with Hg(2+)and Cu(2+)at the same time. We use "masking" reagent, NaBH4, to reduce Hg(2+)to Hg°, the detection of Cu(2+)were achieved. They formed 1:1 complex with the binding constant of 4×10(4)M(-1), a good linear relationship in 0.45-3.6µM and the detection limit of 0.17µM. The proposed method was used to determine Hg(2+)and Cu(2+)in tap water and waste water samples.
合成了一种新型席夫碱荧光探针2-(4-(二苯胺)亚苄基)硫代氨基脲(DPBT)，并通过紫外可见光谱和荧光光谱研究了其对金属离子的传感行为。结果表明，DPBT在弱酸性和中性条件下能灵敏、选择性地检测Hg(2+)，它们以2:1的比例形成配合物。线性范围为0.095 - 1.14µM，检测限为0.15nM。在弱碱性条件下，DPBT能同时与Hg(2+)和Cu(2+)相互作用。我们使用“掩蔽”试剂硼氢化钠将Hg(2+)还原为Hg°，实现了对Cu(2+)的检测。它们形成1:1配合物，结合常数为4×10(4)M(-1)，在0.45 - 3.6µM范围内具有良好的线性关系，检测限为0.17µM。该方法用于测定自来水和废水样品中的Hg(2+)和Cu(2+)。
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