中文摘要：

采用水热方法合成两种混合多羧酸稀土配位聚合物[Ln（ox）0.5（bta）0.5（H2O）]n（Ln=Sm（1），Gd（2））（ox=草酸，bta=1，2，4，5．均苯四甲酸），并通过元素分析、红外光谱、X射线单晶衍射及X射线粉末衍射（PXRD）对配合物进行了表征．结构分析表明，配合物1和2属同构．混合连接体1,2，4，5一均苯四甲酸和草酸连接相应的稀土金属离子，形成复杂的三维网络结构．此外，还对配合物1做了热稳定性和荧光性质的研究．

英文摘要：

Two novel lanthanide polycarboxylate coordination polymers [Ln（ox）0.5（bta）0.5（H2O）2]n, （Ln = Sm （1） and Gd （2）） （ox = oxalic acid; bta = 1,2,4,5-Benzenetetracarboxylic acid） were synthesized under hydrothermal conditions. The polymers were characterized by elemental analysis, IR spectroscopy, single crystal X-ray diffraction and powder X-ray diffraction. The structural analyses reveal that 1 and 2 are isomorphous. The corresponding lanthanide metal ions are connected by mixed-linker 1,2,4,5-benzenetetracarboxylic acid and oxalic acid, consequently, to form intricate three dimensional networks. Additional, the thermal stability and photoluminescence of I were investigated in detail.