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研究了十五种稀土萃取有机相的FT-IR和减差光谱,得到了以下新结果: 1.找到了稀土萃合物的羧基对称伸缩振动吸收峰v_s,同时测定了稀土萃合物的羧基反对称伸缩振动吸收峰v_(as)。 2.计算稀土萃合物的Δv(v_(as)-v_s)值,讨论了萃取有机相中稀土离子的配位结构。 3.观察到萃取有机相中仲辛醇与稀土离子的配位效应,得到仲辛醇的配位能力顺序为:R_E~(3+)>Na~+>环烷酸中H~+。
The FT-IR and subtraction spectra of fifteen REEs were studied. The following new results were obtained: 1. The carboxyl group symmetry stretching vibration peak v_s of rare earth complexes was found, and the carboxyl groups Anti-symmetrical stretching vibration absorption peak v_ (as). Calculate the Δv (v_ (as) -v_s) value of the rare earth extract, and discuss the coordination structure of the rare earth ions in the extracted organic phase. The coordination of secondary octanol with rare earth ions in the organic phase of extraction was observed. The order of coordination ability of secondary octanol was: R_E ~ (3 +)> Na ~ +> H ~ + in naphthenic acid.