【摘要】 研究了Ｎｄ^３＋和Ｅｒ^３＋分别与邻菲罗啉、二苯甲酰甲烷、水杨酸钠组成的配合物在乙醇（或二甲基甲酰胺）－水溶液中的ｆ－ｆ超灵敏跃迁吸收光谱，用微机计算了这些跃迁的振子强度和配合物中每个配体分子引起的振子强度增大值，探讨了振子强度的变化与配位作用的关系，并根据光谱数据计算了电子云重排效应系数β、共价参数δ和键参数ｂ^１，２，讨论了Ｌｎ－Ｌ键的性质，合成了相应的固态Ｎｄ^３＋配合物并测定了其吸收光谱．更多还原

【Abstract】 The absorption spectra of the f-f hypersensitive transition for LnCl₃,LnCL₃-Phen,LnCl₃-HDBM,LnCL₃-NaSal, LnCl₃-HDBM-Phen and LnCl₃-NaSal-Phen inethanol（or DMF）-aqueous solutions were investigated, where Ln￣（3+）=Nd￣（3+） or Er￣（3+）,Phen=1,10-phenanthroline,HDBM=1,3-diphenyl-1, 3-propanedion, and Sal￣-=salicylate ion,The oscillator strengths of the complexes were calculated on a computeraccording to the equation:（Depariment of Chemistry,Zhongshan University,Guangzhou 510275）The incresments of P,ΔP,due to addition of each ligand molecule were figured outtoo. The relation between the change of the oscillator strengths and the coordination ofthe central Ln￣（3+） ions with the ligands was discussed.The nephelauxetic effectcoefficients（β）,covalent parameters（δ）and bond parameters（b￣（1/2））were calculatedfrom the spectral data. The results indicate that the bonds between the Ln￣（3+） and theligands are mainly ionic,and the Er￣（3+）-L bonds may possess less covalent constituentthan the Nd￣（3+）-L ones due to lanthanide contraction. The absorption spectra of the solidNd￣（3+）-complexes were also determined for comparison with those in solutions.更多还原