镧、钇苯甲酸-邻菲啰啉配合物的合成及影响其产率的因素

Synthesis and Influence Factor for the Yield of Ternary Lanthanum and Yttrium Complexes with Benzoic Acid and 1,10-phenanthroline as Ligands

在乙醇溶液中以苯甲酸(BA)和1,10-邻菲啰啉(phen)为配体,合成了镧和钇的三元配合物.通过ED-TA配位滴定和元素分析,确定配合物的组成分别为La(BA)3phen和Y(BA)3phen.红外光谱分析表明,配合物中苯甲酸根的羧基氧原子和邻菲啰啉的氮原子均参与了配位.热分析表明,2种配合物均有较好的热稳定性.系统地研究了pH值、不同配比(水和乙醇)的溶剂对2种配合物产率的影响.结果表明,pH值对配合物的产率影响较大,而溶剂对配合物的产率影响较小.

The La（ Ⅲ ） and Y（ Ⅲ） ternary complexes were synthesized with benzoic acid （BA） and 1, 10- phenanthroline （phen） as ligands in ethanol solution. The composition of these complexes, La （BA）3phen and Y（BA）3phen,were determined by EDTA tirtration and elemental analysis. The ternary complexes were charac- terized by means of IR, TG-DTG. The La（ Ⅲ ） and Y（Ⅲ） ions were coordinated by the oxygen atoms of carboxylate and the nitrogen atoms of phen. Both complexes showed fine thermal stability. The influence of pH values and ratio of solvent on the yield of these complexes were systematically studied,and the results showed that the pH values of the reaction solution was the vital factor for the yield of these complexes,while the influence of solvent was less.