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本文研究了4,7-二苯邻菲绕啉(Dpp)与水杨酸盐(Sal-)和苦味酸盐(Pic-)配合体系萃取稀土元素.实验结果表明:选择Sal-作Dpp的伴随阴离子时,以CHCl_3为稀释剂,萃合物组成为:Ln(Dpp)_2(Sal)_3(Ln=Pr,Nd),Yb(Dpp)_2(Sal)_2Cl.用CH_2Cl_2为稀释剂萃合物的组成为:Pr(Dpp)_2(Sal)_2Cl;Ln(Dpp)(Sal)_2Cl(Ln=Nd,Sm);Ln(Dpp)(Sal)_3(Ln=Er,Yb,Lu).选择Pic作伴随离子时在合物组成为:Ln(Dpp)_2(Pic)_3(Ln=Pr,Sm);Ln(Dpp)_2(Pic)_2Cl(Ln=Tb,Er),Yb(Dpp)(Pic)_2Cl.同时发现,当阴离子为Sal~-(6(?))时lgD-Z曲线呈平坦的“四分组效应”,而用Pic-(7(?))作伴随离子时lgD-Z曲线呈下降趋势的“四分组效应”.
In this paper, rare earth elements were extracted from a mixture of 4,7-diphenyl-phenanthroline (Dpp) with salicylic acid and picric acid (Pic-) .The experimental results show that the selection of Sal- In the case of anion, CHCl_3 was used as the diluent, and the complex was composed of Ln (Dpp) _2 (Sal) _3 (Ln = Pr, Nd) and Yb (Dpp) _2 Ln (Dpp) (Sal) _2Cl (Ln = Nd, Sm); Ln (Dpp) (Sal) _3 (Ln = Er, Yb, Lu) Ln (Dpp) _2 (Pic) _3 (Ln = Pr, Sm); Ln (Dpp) _2 (Pic) _2Cl (Ln = Tb, Er) and Yb (Dpp) ) _2Cl. It was also found that the lgD-Z curve showed a flat “quadruplex” effect when the anion was Sal ~ - (6 (?)) And the lgD-Z curve with Pic- (7 A “quadrant effect” showing a downward trend.