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研究了五个具有不同结构的烷基膦酸二(2-乙基己基)酯,即氯甲基膦酸二(2-乙基己基)酯CH_2ClP(O)(OC_8H_(17-i)_2(1)、β-氯乙基膦酸二(2-乙基己基)酯 ClCH_2CH_2P(O)(OC_8H_(17-i)_2(2)、α-氯乙基膦酸二(2-乙基己基)酯 CH_3CHCIP(O)(OC_8H_(17-i))_2(3)、与相应未取代的甲基膦酸二(2-乙基己基)酯CH_3P(O)(OC_8H_(17-i))_2(4)、乙基膦酸二(2-乙基己基)酯C_2H_5P(O)(OC_8H_(17-i))_2(5),在硝酸体系中对镧系元素的萃取分离性能及其规律,制备了它们的配合物,并用红外光谱和~(31)P核磁共振谱探讨萃取剂及其配合物的结构。
Five di (2-ethylhexyl) alkylphosphonates with different structures, ie, bis (2-ethylhexyl) chloromethylphosphonate CH 2 ClP (O) (OC_8H_ (17-i) (2), bis (2-ethylhexyl) α-chloroethylphosphonate, bis (2-ethylhexyl) (O) (OC_8H_ (17-i)) _2 (3) with the corresponding unsubstituted unsubstituted bis (2-ethylhexyl) methylphosphonate CH_3P (O) 4), the extraction and separation of lanthanides in nitric acid system and its regularity, the preparation of (2-ethylhexyl) ethyl C_2H_5P (O) (OC_8H_ (17-i)) _2 (5) Their complexes were characterized by FTIR and ~ (31) P nuclear magnetic resonance spectroscopy to study the structures of the extractants and their complexes.