稀土氨基酸混配型配合物的合成与表征

Synthesis and Characterization of Mixed Ligand Complexes of Rare Earths with Amino Acids

合成了１４种稀土元素与甘氨酸（Ｇｌｙ），Ｌ－丙氨酸（Ａｌａ）的混配型三元固态配合物ＲＥ（Ｇｌｙ）２．５（Ａｌａ）１．５（ＣｌＯ４）３．Ｈ２Ｏ（ＲＥ＝Ｌａ～Ｌｕ，Ｐｍ除外），并对配合物进行了红外，核磁，荧光，Ｘ射线粉末衍射和热分析，铕（Ⅲ），铽（Ⅲ）三元配合物的荧光强度（Ｅｕ：＾５Ｄ０→＾７Ｆ２；Ｔｂ：＾５Ｄ４→Ｆ５，＾Ｆ６）比相应铕（Ⅲ）或铽（Ⅲ）水合高氯酸盐增大１０倍。

The ternary complexes RE(Gly)_(2.5)(Ala)_(1.5)(ClO_4)_3·H_2O(RE=La～Lu except Pm;Gly=glycine;Ala=L-alanine) have been synthesized in aqueous solution and characterized by elemental analysis,amino acid analysis,IR,￣1H NMR,￣(13)C NMR, X-ray diffraction,thermal analysis and fluorescence spectrometry.The fluorescence intensities of the complexes of Eu(Ⅲ) and Tb(Ⅲ) (Eu:￣5D_0→￣7F_2;Tb:￣5D_0→￣7F_5,￣7F_6) have increased by 10-fold as compared with those of the corresponding perchlorate hydrates of Eu(Ⅲ) and Tb(Ⅲ).