α、β、γ、δ-四(4-二甲氨基苯基)卟啉与钯(Ⅱ)显色反应的分光光度法研究

SPECTROPHOTOMETRIC STUDY ON THE REACTION BETWEEN PALLADIUM AND α、β、γ、δ-TETRA-(4-DIMETHYLAMINOPHENYL) PORPHINE

近年来国内外对卟啉衍生物在分析中的应用进行了广泛的研究,特别是非水溶性卟啉衍生物由于它们具有易合成,易提纯,结构类型多等特点而愈来愈得到重视。本文对非水溶性α、β、γ、δ-四(4-二甲氨基苯基)卟啉〔简称T(4-DMAP)P〕作显色剂测钯(Ⅱ)的反应进行了较系统的研究,找到了显色反应的最佳条件。测得表观摩尔吸光系数达5.7×10~6,是目前测痕量钯(Ⅱ)最灵敏的分光光度法。

The complex reaction of α, β, γ, δ-tetra- (4-dimethylaminophenyl) porphine [T(4-DMA)P] with palladium(Ⅱ) in the presence of anionic surfactant, sodium dodecyl benzene sulfonate and the additional ligand has been studied. The water-insoluble porphine was found to be a highly sensitive reagent for direct spectrophotometric determination of ultramicro palladium (Ⅱ). The molar absotptivity is 5.7×10~6 L·mol^(-1)·cm^(1-) al 436nm. Beer's law was obeyed for 0-1.1μg/25 ml. It seems to be the most sensitive method for the determination of ultramicro Pd(Ⅱ).