咪唑二羧酸构筑的铕配合物的合成、晶体结构及发光性能

2-(邻溴)苯基-4,5-咪唑二羧酸(o-BrPhH₃IDC)与六水合硝酸铕(Eu(NO₃)₃·6H₂O)在对苯二甲酸存在下,在乙睛和水的混合溶剂中,通过溶剂热反应,合成了一个三维超分子配合物(H₃O)Eu(o-BrPhH₂IDC)₄](1)。 采用单晶X射线衍射对配合物1的晶体结构进行了测试,结果表明,配合物1为立方晶系,I-43d空间群;中心铕离子处于一个八配位的体系中。 对配合物1的固态荧光研究发现:在395 nm的激发波长下,标题配合物显示出特征的铕发射光谱。 这说明所采用的有机配体具有良好的天线效应,对铕离子有很好的敏化效应。

Synthesis,Crystal Structure and Luminescent Properties of a Europium Complex from Imidazole Dicarboxylate

By solvothermal reaction of Eu(NO₃)₃ 6H₂O with 2-(2-bromophenyl)-1H-imidazole-4,5-dicarboxylic acid (o-BrPhH₃IDC) in the presence of terephthalic acid, a three-dimensional supramolecular complex (H₃O)Eu(o-BrPhH₂IDC)₄](1) was prepared. The crystal structure of complex 1 was determined by single crystal X-ray diffraction. The results show that complex 1 crystallizes in the cubic system, I-43d space group, and the central europium ion is in a eight-coordinate system. The solid-state fluorescence of complex 1 reveals that complex 1 exhibits a characteristic europium emission spectra at the excitation wavelength of 395 nm which implies that the organic ligand has a good antenna effect and a good sensitization effect on europium ion.