钐、镝-2-噻吩甲酸-2,2′-联吡啶三元配合物的合成及Dy^(3+)的荧光性质研究

Synthesis,characterization and fluorescence of Sm^(3+) and Dy^(3+) complexes with 2-thiophencarboxylic acid-2,2′-bipyridine

合成了钐、镝与2-噻吩甲酸-2,2′-联吡啶的三元配合物。通过元素分析、稀土配合滴定及TG-DTG分析,确定了配合物组成为:REL3L′.C2H5OH(RE=Sm,Dy;L=2-噻吩甲酸,L′=2,2′-联吡啶);摩尔电导数据表明,此配合物为非电解质;测定了配体及配合物的红外光谱,表明配体2-噻吩甲酸中的羧基氧与稀土离子配位,2,2′-联吡啶上两个氮原子与稀土离子配位。还研究了Dy3+配合物的荧光激发和发射光谱。

Two ternary complexes of Sm^3＋ and Dy^3＋ with 2,2＇- bipyfidine 2-thiophene carboxylic acid （L）-have been synthesized. By using the elemental analysis,the rare earth coordination titration,the molar conductivity and TG-DTG studies, the composition of the complexes was suggested as REL3′· C2H5OH（RE = Sm, Dy, L = 2-thiophene carboxylic acid, L′ = 2,2′-bipyfidine）. The molar conductivities in DMF solvent indicated that the complexes were non-electrolyte. The coordination compounds were characterized by IR spectrometry. The IR spectra studies indicated that 2-thiophene carboxylic acid was bonded with RE （ Ⅲ ） through oxygen atoms in carboxyl group, while 2,2＇-bipyridine ligand was bonded to RE （ Ⅲ ） through no nitrogen atoms. And Dy^3 ＋ ternary complexes were studied by the fluorescence excitation and emission spectrometry.