摘要
利用低温固相法合成了3种1-萘甲酸稀土配合物,经元素分析、稀土络合滴定及热重分析确定了配合物的组成为RE(L)3.nH2O[n=0~1;RE=La,Nd,Eu;L=C10H7COO-],红外光谱、核磁共振氢谱表明,1-萘甲酸稀土配合物中配体通过羧基以不对称桥式双齿的方式与稀土离子(Ⅲ)配位成键。二甲亚砜溶液中测定的摩尔电导率表明,所有配合物均为非电解质。铕(Ⅲ)配合物的荧光光谱和配体的磷光光谱表明,配体对铕(Ⅲ)的荧光具有一定的敏化作用。
Three solid complexes of rare earth with 1--naphthoic 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·nH2O(n=0--l;RE=La,Nd,Eu;L=C10H7COO-). IR spectra and HNMR studies indicated that the ligand(L) is bonded with RE(Ⅲ) ions by two oxygen atoms in carboxyl group which coordinate as an asymmetrical bridging bidentate group. The molar conductivity in DMSO solvent indicates that all complexes are non-electrolyte. Fluorescence spectra of Eu^3+ complexe and phosphores-cence spectra of ligand show that the ligand has sensitized Eu^3+ ion in fluorescence intensity.
出处
《稀土》
EI
CAS
CSCD
北大核心
2007年第5期10-14,共5页
Chinese Rare Earths
基金
国家自然科学基金项目资助(20461002)
内蒙古大学"513"二层次人才基金资助
关键词
稀土
萘甲酸
低温固相合成
发光
rare earth
1--naphthoic acid
solid state reaction at low temperature
luminescence