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A novel real-time and ratiometric colorimetric detection method for trace Pb2+ based on 4-phenyl amino thiourea

yanzhengquan 添加于 2018/1/17 19:51:37  499次阅读 | 0次推荐 | 0个评论

The objective of this study was to develop a ratiometric and colorimetric organic sensor for Pb2C detection in environmental samples. A new probe 4-phenyl amino thiourea (PAT) was designed and synthesized using hydrazine hydrate and phenyl isothiocyanate as raw materials. After its structure was characterized and confirmed, its UV–vis spectral property was investigated in detail. PAT possesses a specifically realtime, ratiometric and colorimetric response to Pb2C in dimethyl formamide (DMF)/H2O (v/v D 9:1, pH D 7.0) within 18.0 s. There was little interference in the presence of some other common metal ions, such as Fe3C, Cd2C, Zn2C, Mg2C, Cr3C, Ca2C, Ba2C, Sn2C, NaC, Mn2C, Hg2C, and Pb2C. Under the optimized conditions (DMF/H2O with v/v of 9:1, cPAT D 1.0 £ 10¡3 mol¢L¡1, pH D 7.0), the present sensor PAT was successfully applied for Pb2C determination in environmental water samples with satisfied recoveries (83.0%–106.0%) and analytical precision (7.2%). The recognition mechanism was confirmed to form a stable 1:1 six-member ring complex between the target dye and Pb2C with a coordination constant of 4.96 £ 104.

作 者:Shanyi Guang*, Xia Ren, Shuang Zhao, Zhengquan Yan*, Gang Zhao, Hongyao Xu*
期刊名称: Journal of Environmental Science and Health Part A-Toxic/Hazardous Substances & Environmental Engineering
期卷页: 2018 第53卷 第6期 555–560页
学科领域:化学科学 » 分析化学 » 光谱分析
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原文链接:http://www.tandfonline.com/doi/abs/10.1080/10934529.2018.1425022?journalCode=lesa20
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