含RE^（3＋），Cu^（2＋）杂金属配合物合成与表征

Synethesis and Characterization of HeterometallicLathanoid(Ⅲ)-Copper(Ⅱ)Complexes

以吡啶乙酸内盐，简称ｐｙｂ）为配体，在ｐＨ２．５和３．５下分别合成了２类配合物。经过元素分析和红外光谱等分析，确定了配合物的组成分别为ＲＥＣｕ（Ｐｙｂ）_５（ＣｌＯ_４）_５·ｎＨ_２Ｏ（ＲＥ＝Ｌａ，Ｃｅ，Ｎｄ，Ｓｍ，Ｇｄ，Ｄｙ，Ｅｒ，Ｙ）和ＲＥ_６Ｃｕ_（１２）（ＯＨ）_（２４）（Ｐｙｂ）_（１２）（ＣｌＯ_４）_（１８）·ｎＨ_２Ｏ（ＲＥ＝Ｌａ，Ｃｅ，Ｎｄ，Ｓｍ，ｎ＝３２；ＲＥ＝Ｇｄ，Ｄｙ，ＥｒＹ，ｎ＝２８），观察了Ｎｄ^（３＋）的水溶液中，分别加入Ｐｙｂ，Ｐｙｂ和Ｃｕ^（２＋）或Ｍｎ^（２＋），Ｎｉ^（２＋），Ｐｒｂ［三甲基按丙酸内盐，（ＣＨ_３）_３Ｎ~＋，简称Ｐｒｂ］，Ｐｒｂ和Ｃｕ^（２＋）后，ｆ－ｆ超灵敏跃迁吸收光谱的变化。结果表明，在ｐＨ２．５和３．５下，Ｃｕ^（２＋）均使Ｎｄ^（３＋）·ｐｙｂ体系超灵敏跃迁的振子强度增大，且增大值相同，Ｃｕ^（２＋）对Ｎｄ^（３＋）－Ｐｒｂ体系、Ｍｎ^（２＋）（或Ｎｉ^（２＋））对Ｎｄ^（３＋）－Ｐｙｂ体系超灵敏跃迁吸收光谱均无影响，讨论了超灵敏跃迁振子强度变化与杂金属配合物形成的关系。

Two seriess of RE￣(3+)- Cu￣(2+)complexes containing pyridinioacetate(C_5H_5N￣+CH_2, ab-breviated as Pyb ) ligands have been synthesized;the empirical formula are RECu(Pyb )_5(ClO_4)_5 · nH_2O(RE=La, Ce, Nd, Sm,Gd, Dy,Er,Y)and RE_6Cu_(12)(OH)_(24)(Pyb)_(12)(ClO_4)_(18)· nH_2O(RE=La,Ce,Nd,Sm , n=32;RE=Gd, Dy,Er,Y,n=28)respectively.The complexes have been characterized by elemental analysises and IR spectra,The absorptionbands of the f-f hypersensitive transition for Nd￣(3+) in aqueous solution in the presence of Pyb,Pyb and Cu￣(2+) , Mn￣(2+), Ni￣(2+),Prb(trimethylammoniopropionate), Prb and Cu￣(2+)were invesigated.The results show that Cu￣(2+) can enhance the oscillator strength of Nd￣(3+)-Pyb aqueous solution, andthe increased value is the same when pH value is ～ 2. 5 and～3.5. No influence of Mn￣(2+) orNi￣(2+) on Nd￣(3+)-Pyb and Cu￣(2+)on Nd￣(3+)-Prb svstems have been observed. The correlation betweenthe change of oscillator strength and the formation of heterometallic complexes have been dis-cussed.