A novel 4-phenyl amino thiourea derivative designed for real-time ratiometric-colorimetric detection of toxic Pb2+
A novel 4-phenyl amino thiourea derivative designed for real-time ratiometric-colorimetric detection of toxic Pb2+
复制标题
一种新型 4-苯基氨基硫脲衍生物，设计用于实时比率比色法检测有毒 Pb2
DOI：
10.1080/10934529.2018.1425022
复制
发表时间：
2018-01-01
影响因子：
2.1
通讯作者：
Xu, Yao H.
中科院分区：
文献类型：
--
作者：
Guang, Yi S.;Ren, Xia;Xu, Yao H.
本研究的目的是开发一种用于环境样品中Pb 2+检测的比率和比色有机传感器。以水合肼和异硫氰酸苯酯为原料，设计并合成了一种新的探针4-苯基氨基硫脲（PAT）。在对其结构进行表征和确认后，对其紫外-可见光谱性质进行了详细的研究。在二甲基甲酰胺（DMF）/水（v/v = 9：1，pH = 7.0）中，PAT对Pb ~（2+）的响应时间为18.0s。其它常见金属离子如Fe ~（3+）、Cd ~（2+）、Zn ~（2+）、Mg ~（2+）、Cr ~（3+）、Ca ~（2+）、Ba ~（2+）、Sn ~（2+）、Na ~（2+）、Mn ~（2+）、Hg ~（2+）、Pb ~（2+）等对测定的干扰较小。在最佳条件下（DMF/H_2O = 9：1，c（PAT）= 1.0 × 10 ~（-3）molL ~（-1），pH = 7.0），该传感器用于环境水样中Pb ~（2+）的测定，回收率在83.0%~ 106.0%之间，精密度为7.2%。结果表明，目标染料与Pb ~（2+）形成稳定的1：1六元环配合物，配位常数为4.96 × 10 ~（4）。
The objective of this study was to develop a ratiometric and colorimetric organic sensor for Pb2+ 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 real-time, ratiometric and colorimetric response to Pb2+ in dimethyl formamide (DMF)/H2O (v/v = 9:1, pH = 7.0) within 18.0s. There was little interference in the presence of some other common metal ions, such as Fe3+, Cd2+, Zn2+, Mg2+, Cr3+, Ca2+, Ba2+, Sn2+, Na+, Mn2+, Hg2+, and Pb2+. Under the optimized conditions (DMF/H2O with v/v of 9:1, c(PAT) = 1.0x 10(-3) molL(-1), pH = 7.0), the present sensor PAT was successfully applied for Pb2+ 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 Pb2+ with a coordination constant of 4.96x 10(4).