摘要
由Er2O3、H4SiMo12O40和nmp合成了分子组成为[Er(nmp)4(H2O)3]H[SiMo12O40]2nmp0.5H2O(nmp=N-甲基吡咯烷酮)的配合物,并通过单晶X-射线衍射测定了晶体结构。结果表明,该化合物属单斜晶系,P21/c空间群,晶胞参数a=17.4601(7),b=18.1906(5),c=22.9096(8)?b=105.2980(10),Z=4,V=7018.5(4)3,Dc=2.504g/cm3,R=0.0460,wR=0.1114,F(000)=5064.配合物中Er3+以七配位的单加冠三棱柱构型配阳离子形式存在,与之配位的是4个N-甲基吡咯烷酮和3个H2O分子,该配阳离子与[SiMo12O40]4-阴离子通过静电作用相结合。
A new complex [Er(nmp)4(H2O)3]H[SiMo12O40]2nmp0.5H2O (NMP = N-methyl-2-pyrrolidone) has been synthesized and characterized by IR, UV, ESR and single-crystal structural analysis. It belongs to monoclinic, space group P21/c with a = 17.4601(7), b = 18.1906(5), c = 22.9096(8) ? b = 105.2980(10), Z = 4, V = 7018.5(4) 3, Dc = 2.504 g/cm3, R = 0.0460 and wR = 0.1114. The water and organic ligands (nmp) coordinate directly to Er(III) to form a capped trigonal prism cation which combines the SiMo12O404- anion through static electric force. The results of IR and X-ray analysis show that there exists strong interaction between the polyoxometalate and organic donors.
基金
河南省杰出青年基金
河南省教育厅自然科学基金(20011500024)资助项目
