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在水热条件下合成了一种具有Keggin结构的有机-无机复合的单铈取代夹心型磷钨酸盐[H2dap]2.5H5-[Ce(α-PW11O39)2].11.5H2O(1);利用元素分析、红外光谱和单晶X射线衍射表征了其结构.结果表明,化合物1属于三斜晶系,P-1空间群,晶胞参数为:a=1.254 9(7)nm,b=1.915 9(11)nm,c=2.129 0(12)nm,α=68.426(10)°,β=88.320(10)°,γ=89.853(10)°,V=4.758(5)nm3,Z=2,Dc=4.116g/cm3,GOOF=1.022,R1=0.111 2,wR2=0.218 9.化合物1分子由1个晶体学独立单铈取代夹心型[Ce(α-PW11-O39)2]10-磷钨酸多阴离子,2.5个双质子化的[H2dap]2+阳离子,5个质子及11.5个结晶水分子组成.
An organic-inorganic composite single-cerium substituted sandwich type phosphotungstate [H2dap] 2.5H5- [Ce (α-PW11O39) 2] 11.5H2O (1) with Keggin structure was synthesized under hydrothermal conditions. Elemental analysis, IR and single crystal X-ray diffraction. The results show that compound 1 belongs to the triclinic system with P-1 space group and the unit cell parameters are: a = 1.254 9 (7) nm, b = 1.915 Α = 68.426 (10) °, β = 88.320 (10) °, γ = 89.853 (10) °, V = 4.758 (5) nm3 and Z = 2 , Dc = 4.116 g / cm3, GOOF = 1.022, R1 = 0.111 2, wR2 = 0.218 9. The compound 1 molecule consists of a single crystal of monoclinic substitution of center [Ce (α-PW11-039) 2] Tungstic acid polyanion, 2.5 double protonated [H2dap] 2+ cations, 5 protons and 11.5 crystal water molecules.