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多联吡啶及其衍生物是一类具有独特性质的配体,可以与Cu(Ⅰ)和Ag(Ⅰ)等形成络合物.随着对多联吡啶化合物的深入研究,很多联吡啶化合物被合成并应用于化学研究中.本文对三联吡啶的衍生物6,6’-二甲基-4’-苯基-2,2’:6’,2”-三联吡啶(TPY)和铜(Ⅱ)的络合反应进行了研究,结果发现在pH 40～5.8的HAc-NaAc体系中Cu(Ⅱ)和TPY形成了绿色络合物,最大吸收波长为339.5nm;摩尔吸光系数ε_(339.5)=2.108×10~4L·mol~(-1)·cm~(-1),灵敏度较高.铜(Ⅱ)在0.12～2.8mg/L服从比尔定律;相关系数r=0.9997.据此建立了一种三联吡啶测定铜的新方法,将该法用于人发和铅矿样品中铜含量的测定,均获得满意的结果.
Polybipyridyl and its derivatives are a class of unique ligands that can form complexes with Cu (I) and Ag (I), etc. With the further investigation of polypyridyl compounds, many bipyridine compounds have been Synthesis and application in chemical research.In this paper, the derivatives of terpyridine 6,6’-dimethyl-4’-phenyl-2,2’6’2’2’-terpyridine (TPY) and copper ) Was studied. It was found that Cu (Ⅱ) and TPY formed a green complex in the HAc-NaAc system at pH 40-5.8 with a maximum absorption wavelength of 339.5 nm. The molar absorptivity ε 339.5 = 2.108 × 10-4L · mol -1 cm -1, and the sensitivity was high.The Beer’s law was obeyed at 0.12 ~ 2.8mg / L for copper (Ⅱ), the correlation coefficient was 0.9997, A new method for the determination of copper with terpyridine was developed. The method was applied to the determination of copper in human hair and lead samples, and satisfactory results were obtained.