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本文用硝酸稀土与水杨酸二甘醇二酯 (简写为 SE0 2或 L)在乙酸乙酯溶液中反应 ,合成了一系列新的固体配合物。以 L a、Gd、L u的配合物为代表 ,用元素分析确定其组成为 L n(NO3) 3C1 8H1 8O7· n H2 O(n=2或 3) ,用IR、UV光谱考察了配合物中稀土与配体间的配位情况 ,证明配体中的酚羟基氧、酯羰基氧和醚氧均参与了配位 ,其中以末端基的酚羟基氧和羰基氧的配位为主 ,与重稀土的配位强度明显高于轻、中稀土。配合物在空气、水及有机溶剂中稳定性好 ,加热时要到 30 0℃左右才发生放热分解反应 ,且重稀土的稳定性明显高于轻、中稀土
In this paper, a series of new solid complexes were synthesized by the reaction of rare earth nitrate with diglycol salicylate (SE0 2 or L for short) in ethyl acetate solution. The complex of L a, Gd and L u was taken as the representative, and its composition was determined as L n (NO3) 3C1 8H1 8O7 · n H 2 O (n = 2 or 3) by elemental analysis. The complex The coordination between rare earth and ligand showed that the phenolic hydroxy oxygen, the ester carbonyl oxygen and the ether oxygen in the ligand all participated in the coordination. The coordination between the phenolic hydroxyl oxygen and the carbonyl oxygen in the terminal group was mainly The coordination intensities of heavy rare earths are obviously higher than those of light and medium rare earths. The complex has good stability in air, water and organic solvents. When heated to about 30 0 C, the exothermic decomposition reaction takes place. The stability of heavy rare earth is obviously higher than that of light and medium rare earth