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通过水热合成方法,合成了一种新型的硅钨酸盐担载的有机无机复合物[Zn(2,2-′bipy)3]1.5[SiW12O40Zn(2,2-′bipy)2(OH)].0.25H2O,并对其进行了元素分析、红外光谱、热分析及X-射线单晶衍射等表征.结构分析表明,标题化合物结构单元中含有1个[SiW12O40Zn(2,2-′bipy)2(OH)]3-杂多阴离子,1.5个[Zn(2,2-′bipy)3]2+阳离子和0.25个结晶水分子.在[SiW12O40Zn(2,2-′bipy)2(OH)]3-杂多阴离子中,Keggin阴离子[SiW12O40]4-通过一个端氧原子与[Zn(2,2-′bipy)2(OH)]+共价相连.TG-DTA热分析曲线表明多阴离子的骨架在618℃分解.
A novel silicotungstate loaded organic-inorganic composite [Zn (2,2-’bipy) 3] 1.5 [SiW12O40Zn (2,2-’bipy) 2 (OH) ] .0.25H2O, and its elemental analysis, IR, thermal analysis and X-ray single crystal diffraction characterization.The structural analysis showed that the title compound structural unit contains a [SiW12O40Zn (2,2-’bipy) 2 (OH)] 3-heteropolyanion, 1.5 [Zn (2,2-’bipy) 3] 2+ cations and 0.25 crystal water molecules were synthesized in the presence of [SiW12O40Zn ] 3-heteropolyanion, the Keggin anion [SiW12O40] 4 is covalently linked to [Zn (2,2-’bipy) 2 (OH)] + via one terminal oxygen atom.The TG-DTA thermogram shows that polyanion The skeleton breaks down at 618 ° C.