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以Keggin结构多金属氧酸盐(Si W12)为建筑块,在水热条件下,设计合成了多酸基金属-有机配合物[Cu(phen)2]4(Si W12O40)(phen=1,10-邻菲咯啉)(化合物1),利用X-射线单晶衍射、红外光谱、元素分析等对其组成及结构进行了表征,并研究了对乙酸乙酯合成反应的催化性能.单晶解析数据表明,化合物1为P212121空间群,单元结构中包含1个α-Keggin型的阴离子(Si W12O40)4-和4个阳离子[Cu(phen)2]+,价键计算结果表明,4个2价铜离子均被还原为1价.化合物1对乙酸乙酯合成反应具有一定的催化作用,在相同反应条件下,其催化性能优于浓硫酸.
In this paper, Keggin-based polyoxometalates (Si W12) were used as building blocks to synthesize polyoxometalate complexes [Cu (phen) 2] 4 (Si W12O40) 10-phenanthroline) (compound 1) was synthesized and its composition and structure were characterized by X-ray single crystal diffraction, infrared spectrum and elemental analysis. The catalytic performance of the synthesis of ethyl acetate The analytical data show that compound 1 is P212121 space group and contains 1 α-Keggin-type anion (Si W12O40) 4- and 4 cations [Cu (phen) 2] + in the unit structure. 2-valent copper ions are reduced to monovalent 1. Compound 1 has a certain catalytic effect on the synthesis of ethyl acetate, under the same reaction conditions, its catalytic performance is better than the concentrated sulfuric acid.