3,4-噻吩二羧酸（3,4-H2tdc）, 1,10-邻菲罗啉（phen）和稀土硝酸盐经水热法合成三种配合物Ln2(Htdc)2(tdc)2(phen)2(H2O)4(Ln=Eu 1, Gd 2, Tb 3), 并用X-射线单晶衍射分析方法测定了配合物1-3晶体结构, 配合物1-3为双核分子。 每个金属离子周围有2个3,4-tdc, 1个3,4-Htdc, 1个phen和2个配位水分子, 配位数为9。 配合物1和3在紫外灯下显强红光和绿光, 其荧光发射光谱, 在619和545 nm出现最大发射峰, 分别对应于Eu(Ⅲ)离子的5D0→7F2和Tb(Ⅲ)离子的5D4→7F5跃迁。 配合物2在425 nm观察到来自基于配体的π*→π最大发射峰。 不同溶剂分子对配合物1荧光有不同程度的影响, 基于荧光猝灭机理, 配合物1具有选择性检测硝基苯污染物的能力。

3,4-thiophenedicarboxylic acid (3,4-H2tdc) as the first ligand, 1,10-phenanthroline (phen) as the auxiliary ligand, three complexes Ln2(Htdc)2(tdc)2(phen)2(H2O)4(Ln=Eu 1, Gd 2, Tb 3) were synthesized with hydrothermal method. Single-crystal X-ray diffraction analysis reveals that complexes 1-3 were isostructural crystallize and both of complexes are binuclear molecules. In the complexes 1-3, the coordination number is nine. Each metal is bound to two 3, 4-tdc ligand, one 3,4-Htdc ligand, one phen and two water molecule. Complexes 1 and 3 display the red and green light under UV lamp, corresponding the characteristic peaks from 619 nm (5D0→7F2) and 545 nm (5D4→7F5). Complex 2 expresses a broad band at 425 nm is attributed to π*→π transition. Furthermore, under the excitation wavelength of 329 nm, the effects of different solvents on complex 1 was discussed and complex 1 could be a potential luminescent probe for detecting nitrobenzene through fluorescence quenching mechanism.