中文摘要：

以均苯三甲酸为配体，水热条件下合成了均苯三甲酸铕及铕镧系列发光配合物LaxEu1-x（BTC）·nH2O（x=0，0．1，0．3，0．5，0．7，0．9），通过元素分析及化学滴定法测定了配合物的组成。用红外光谱对其进行了表征，确定了该系列配合物的组成为LaxEu1-x（BTC）·nH2O。研究了系列配合物的荧光性质，荧光光谱表明：该类配合物均能发出强的铕离子的特征荧光，并且镧元素的掺入能增强铕配合物的发光强度，但发射峰的位置基本上没有变化；其中^5D0→^7F1和^5D0→^7F2的跃迁发射较强，且均劈裂为两个峰（587，593nm）和（611，618nm），这是由于铕离子所处的配位环境引起的。

英文摘要：

It is well known that aromatic acids serve as excellent ligands to effect sensitization of lanthanide fluorescence. 1,3,5- H3BTC has three carboxylate groups and displays widely varying coordination manner, functioning as a monodentate, bidentate, bridging or chelating ligand in complexes with metal ions. On the other hand, the rare earth carboxylate complexes are the active area of research due to their fluorescence and application in high-teach industry, the application foreground is very fast. In recent years, there are many studies carrying on the carboxylate complexes in order to look for the good fluorescent materials, one of the major activities in these studies is the enhancement of fluorescence by using of certain rare earth ions, such as La^3＋, Y^3＋ and Gd^3＋. The published dates on these were mainly focused on benzoic acid and benzene dicarboxylate acid complexes, the complexes of trimesic acid with europium and lanthanum were comparatively scare. Only europium-trimesic acid fluorescence complexes were studied. A series of mixed rare earth complexes LaxEu1-x（BTC） · nH2O （ H3BTC = 1, 3, 5-H3BTC, x = 0, 0.1,0.3, 0.5, 0.7, 0.9） have been synthesized by the reaction of trivalent rare earth chlorides with trimesic acid. The contents of rare earth, C and H were measured by using EDTA titration method and a Vario EL elemental analyzer, the constitution of these complexes was confirmed respectively as follows： LaxEu1-x （BTC） · nH2O （x= 0,0.1,0.3,0.5,0.7,0.9, n=0,0. 5,1.0）. The IR spectra of free ligand and complexes were recorded by FTZR-8900 infrared spectroscopy with KBr pellet in the range of 350 - 3 500 cm^-1. There is obviously difference between the ligand and complexes. The results show that the similar structures of the complexes and the different coordination functions of the carboxylate groups. Fluorescence spectra were carrying out by using a Hitachi F-4500 fluorescence spectrophotometer. The results indicate that the complex can emit intense characteristic fluorescence