5,10,15,20-四（4-羧基苯基）卟啉（TCPP）检测水体痕量Hg2+的研究

Study on the fluorescence detection of Hg2+ in water by 5,10,15,20-tetra-（4-carboxyphenyl） porphyrin（TCPP）

由于羧基卟啉在水中良好的溶解性及对Hg^2+的高亲和性,利用5,10,15,20-四(4-羧基苯基)卟啉与Hg^2+反应前后的荧光特性变化,实现水体Hg^2+的痕量检测。结果显示,该探针与Hg^2+具有良好的配位性,且检测前后体系出现的颜色变化具有可视性。在中性条件下,四羧基卟啉荧光被Hg^2+猝灭,荧光强度与汞离子浓度之间存在良好的指数函数关系,相关系数为0.998。因此,5,10,15,20-四(4-羧基苯基)卟啉可作为一种高效、可靠的探针用于水体中Hg^2+的痕量检测。

Based on the great solubility and high affinity of carboxyloporphyrin for mercury ion in water,the fluorescence properties of 5,10,15,20-tetra-(4-carboxyphenyl)porphyrin and Hg^2+were used to realize the water body trace detection of Hg^2+.The results indicated that the porphyrin was favorable to coordinate with mercury ion,and the color changes of the system exhibited obviously visible before and after the detection of mercury ion.Under neutral conditions,the fluorescence emission spectrum of 5,10,15,20-tetra-(4-carboxyphenyl)porphyrin was quenched by mercury ion.There is a excellent exponential function between fluorescence intensity of porphyrin and mercury ion concentration with a correlation coefficient of 0.998.Therefore,5,10,15,20-tetra-(4-carboxyphenyl)porphyrin can be used as a highly efficient and reliable probe for the trace detection of Hg^2+in water.