低温固相反应合成苯羟乙酸稀土配合物及其性质研究

Synthesis and Characterization of Phenyl-Hydroxylacetic Acid Rare Earth Complexes at Low Temperature Solid State Reaction and Studies on Luminescence Property of Eu^(3+),Tb^(3+) Complexes

利用低温固相反应合成了4种苯羟乙酸稀土配合物:RE(L)3.4H2O[RE=La,Nd,Eu,Tb;L=C6H5CH(OH)COO-],并通过元素分析、稀土络合滴定、摩尔电导及热重分析确定了配合物的组成。红外光谱、核磁共振氢谱表明,苯羟乙酸稀土配合物中配体通过羧基以羧基氧负离子和醇羟基同时参与稀土离子(Ⅲ)配位,两分子水也参与稀土的配位。铕(Ⅲ)、铽(Ⅲ)配合物的荧光光谱和配体的磷光光谱表明,配体对铕(Ⅲ)、铽(Ⅲ)的荧光具有一定的敏化作用。

Four solid complexes of rare earth with phenyl- hydroxylacetic acid （L） have been synthesized by method of solid state reaction at low temperature. Elemental analysis, rare earth coordination titration and TGA studies suggest that the composition of the complexes is RE（L）3·4H2O[RE= La,Nd,Eu,Tb; L= C6H5CH（OH）COO- ]. IR spectra and 1HNMR studies indicated that the ligand（L） is bonded with RE（Ⅲ）by one oxygen atom in the carboxyl group and the oxygen atom in the hydroxyl group.The molar conductivity in DMSO solvent indicates that all complexes are non - electrolyte. Fluorescence spectra of Eu3 ＋ and Tb3＋ complexes and phosphorescence spectra of ligand show that the ligand Ires sensitized Eu3 ＋ and Tb3 ＋ in fluorescence intensity.