Synthesis and properties of a Pr(III) complex with 2-acetyl- benzimidazoledehyde-glycine Schiff-base ligand

The 2-acetyl-benzimidazoledehyde-gly- cine Schiff-base ligand and the corresponding Pr(III) complex Pr2L3(NO3)3·2CH3OH (L=C11H10N3O2) were synthesized in methanol and characterized by a series of methods, including chemical analysis, elemental analysis, TOF-MS, 1H NMR, UV-, IR-, Raman spectra, thermal analysis, and the three-dimension fluores- cence excitation and emission spectra. The Pr(III) complex exhibits extraordinary water-solubility and the Pr(III) hydroxide appears at pH≥13. The complex also possesses specific fluorescent properties. Thus, at the excitation wavelengths 200.0-280.0 and 260-350 nm the fluorescence bands were observed at 290.0 and 400.0 nm, respectively.

稀土氨基酸混配型配合物的合成与表征

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。