稀土金属有机配位聚合物的绿色合成及发光性能

Green Synthesis and Luminescent Propeties of Lanthanide Metal-organic Coordination Polymers

为了在合成过程中降低能量消耗和避免有机溶剂的使用,探索了稀土金属有机配位聚合物的绿色合成。将配体对苯二甲酸H2BDC通过氨水转化为水溶性的羧酸铵盐,在水溶液中快速获得了配位聚合物Ln2(BDC)3-(H2O)4(Ln=Eu,Tb,Dy)。通过XRD、IR、SEM、TGA、PL等手段对以上产物进行了表征。SEM结果显示产物均具有微米花球状结构,紫外激发下聚合物表现出比较强的稀土离子的特征发射。本合成线路具有操作简便、反应迅速、高产率、节约能源及环境友好等特点。

Green synthesis of lanthanide metal-organic coordination polymers was explored for the purpose of energy saving and avoiding the use of organic solvents. By converting carboxylic acids H2 BDC （BI）C= 1,4-benzenedi- carboxylate） into carboxylate ammonium salts, a series of lanthanide coordination polymers Lnz （BDC）3 （HzO）4 （Ln= Eu, Tb, Dy） were synthesized in water in a very short time. The products were characterized by powder XRD, IR, SEM, TGA and PL. SEM images reveal that the compounds all exhibit hierarchical architectures in the size range of 5-- 10 μm. The polymers show the strong characteristic emission o{ Ln3＋ under u[traviolet excitation. The remarkable features of this synthesis method are operational simplicity, short reaction time, high yields, energy saving and envi- ronmental benign conditions.