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等曾研究二(2-乙基已基)二硫代磷酸(D2EHDTPA)对多种金属离子的萃取。国内也有人研究它对一些金属离子的萃取。但该萃取剂在硝酸体系中萃取汞(Ⅱ)的研究未见报道。D2EHDTPA与D2EHPA[二(2-乙基己基)磷酸]比较,由于它们形成萃合物时键合原子不同(S-M和O-M),对相同金属离子的萃取能力相差甚大。本文在萃取实验基础上,以量子化学计算结果和有关光谱数据为理论解释了这种现象。
Had studied two (2-ethylhexyl) phosphorodithioic acid (D2EHDTPA) on the extraction of a variety of metal ions. Some people in China also study it for some metal ion extraction. However, the extractant in the nitric acid extraction of mercury (Ⅱ) has not been reported. D2EHDTPA differs from D2EHPA [di (2-ethylhexyl) phosphate] in that the ability to extract the same metal ions varies greatly due to the different bonding atoms (S-M and O-M) in their formation of the extract. In this paper, based on the extraction experiments, quantum chemical calculations and related spectral data as a theoretical explanation of this phenomenon.