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在水热环境下,将Na10[α-SiW9O34]爛18H2O和CuCl2爛2H2O在2,2′-联咪唑和4,4′-联吡啶存在下反应合成一种饱和Keggin硅钨酸盐杂化物[Cu(biim)2]4[α-SiW12O40]2爛4H2O(1),并通过红外光谱,X射线光电子能谱和X射线单晶衍射进行了结构表征.化合物1分子包含2个中性的Keggin[Cu(biim)2]2[α-SiW12O40]单元和4个结晶水分子.值得注意的是在[α-SiW12O40]4-单元中,与硅原子相连的每个氧原子无序排列在两个位置,这导致了硅原子呈现立方体的几何构型.中性Keggin型[Cu(biim)2]2[α-SiW12O40]单元具有中心对称性,两个[Cu(biim)2]2+配离子对称连接在[α-SiW12O40]4-的两端.邻近的[Cu(biim)2]2[α-SiW12O40]单元之间通过氢键作用形成三维的超分子结构.
In a hydrothermal environment, Na10 [α-SiW9O34] rot 18H2O and CuCl2 rot 2H2O were reacted in the presence of 2,2’-biimidazole and 4,4’-dipyridyl to synthesize a saturated Keggin silicotungstate hybrid [ The structure of Cu (biim) 2] 4 [α-SiW12O40] 2H2O 4H2O (1) was characterized by FTIR, X-ray photoelectron spectroscopy and X-ray single crystal diffraction. [Cu (biim) 2] 2 [α-SiW12O40] and 4 crystal water molecules.It is noteworthy that in the [α-SiW12O40] 4-unit, each oxygen atom attached to the silicon atom is arranged in disorder at two Which leads to the cubic geometry of the silicon atom.The central Keggin [Cu (biim) 2] 2 [α-SiW12O40] units have central symmetry and two [Cu (biim) 2] 2+ Ionically symmetrically linked at both ends of [α-SiW12O40] 4-, three-dimensional supramolecular structures were formed by hydrogen bonding between adjacent [Cu (biim) 2] 2 [α-SiW12O40] units.