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利用常规水溶液方法合成了一种有机-无机杂化的包含银的Keggin型锗钼酸盐[NH_4]_2[Ag(H_2O)(H_2PDCA)]_2[α-GeMo_(12)O_(40)]·12H_2O(1),并通过元素分析、红外光谱和单晶X射线衍射等对其进行了表征.X射线晶体学研究表明化合物1的分子结构由1个典型的Keggin结构[α-GeMo12O40]~(4-)聚阴离子、2个[Ag(H_2O)(H_2PDCA)]~+配离子、2个NH+4离子和12个结晶水分子构成.值得注意的是在[α-GeMo_(12)O_(40)]~(4-)单元中,锗原子呈现出立方体几何配位构型,这归结于与锗原子相连的每个氧原子都无序地排列在两个位置.有趣的是,每个[α-GeMo_(12)O_(40)]~(4-)多阴离子通过4个[Ag(H_2O)(H_2PDCA)]~+桥配离子与4个[α-GeMo_(12)O_(40)]~(4-)多阴离子相连构筑了二维层状结构.此外,我们还在室温下研究了化合物1的电化学性质.
An organic-inorganic hybrid Keggin-type germanium molybdate [NH 4] 2 [Ag (H 2 O) (H 2 PDCA)] 2 [α-GeMo 12 O 40] was synthesized by the conventional aqueous method 12H2O (1) were synthesized and characterized by elemental analysis, IR and single crystal X-ray diffraction.The X-ray crystallographic studies showed that the molecular structure of compound 1 was composed of a typical Keggin structure [α-GeMo12O40] 4-polyanion, 2 [Ag (H 2 O) (H 2 PDCA)] + ion, 2 NH + 4 ion and 12 crystal water molecules.It is noteworthy that in [α-GeMo_ (12) O_ 40)] ~ (4-) units, the germanium atoms exhibit a cubic geometric configuration due to the unordered arrangement of each of the oxygen atoms connected to the germanium atoms at two positions. Interestingly, each [α-GeMo_ (12) O_ (40)] ~ (4) polyanions are bound to four [α-GeMo_ (12) O_ (40) ] ~ ~ (4-) polyanion to form a two-dimensional layered structure.In addition, we also studied the electrochemical properties of compound 1 at room temperature.