稀土Pr(Ⅲ)配合物的合成和荧光性能研究

Synthesis and Study on the Fluorescence Property of the Pr(Ⅲ)Complex

在水热条件下合成了一个新的Pr(Ⅲ)配合物{[Pr_2(1,4-pda)_3(H_2O)_2]·H_2O}_n(1,4-pda=对苯二乙酸),利用x射线测得晶体结构,同时用红外光谱、元素分析、荧光分析等手段对晶体配合物进行了表征。结果表明,该配合物属于单斜晶系,空间群为P21/c,a=21.947(3),b=10.1300(11),c=14.1241(16),β=91.528(2)°,V=3139.0(6)~3,Z=8。晶体结构分析表明:Pr离子有Pr1和Pr2两种不同的配位环境,Pr1和Pr2通过对苯二乙酸的桥连形成二维网状结构,再由对苯二乙酸的支撑将二维网状构成三维立体结构。同时对配合物的固态荧光性能和热稳定性进行了研究。

There w as a new Pr^（3＋） com plex {[Pr_2（1,4-pda）_3（H_2O）_2]·H_2O}_n,（pda=1,4-phenylenediacetic acid）w as synthesized under hydrotherm al condition,and it w as characterized by the m eans ofelem entalanalysis,single crystal X-ray diffraction,IR spectroscopy and fluorescence spectroscopy.The results show ed thatthe com plex w as m onoclinic w ith a space group of P21/c,a=21.947（3）,b=10.1300（11）,c=14.1241（16）,β= 91.528（2）°,V = 3139.0（6）~3 and Z= 8.The crystalstructure ofcom plex revealed that Pr^（3＋） ion had tw o differentcoordination environm ents.The 1,4-pda ligands bridged Pr1 and Pr2 to form a tw o-dim ensional（2D）net structure.Then the tw o-dim ensional（2D）netstructuresunited togetherto bulid a three-dim ensional（3D）structure.In additional,the fluorescence property and therm alstability ofthe com plex had also been studied.