Abstract Two new capping Nb-Keggin clusters, [{Cu(2,2′-bipy)}6(TNb12O40)]3− (T = P and As), have been hydrothermally synthesized and characterized by IR spectroscopy, single crystal X-ray diffraction, powder X-ray diffraction, elemental analysis and thermal gravimetric analysis. The polyoxoanion [{Cu(2,2′-bipy)}6(TNb12O40)]3− consists of a classical α-Keggin-type {TNb12O40} structure capped by six {Cu(2,2′-bipy)} fragments, which represents the first example of copper-capped Keggin-type {TNb12O40} polyoxoanion. Besides, the organo-amines play key roles in the construction of structural diversity under the studied system.

中文翻译：

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两种六铜封端的 Keggin 型聚氧铌酸盐的合成与表征

摘要 水热合成了两种新的 Nb-Keggin 封端团簇 [{Cu(2,2'-bipy)}6(TNb12O40)]3− (T = P 和 As)，并通过红外光谱、单晶 X-射线衍射、粉末 X 射线衍射、元素分析和热重分析。多氧阴离子 [{Cu(2,2'-bipy)}6(TNb12O40)]3− 由经典的 α-Keggin 型 {TNb12O40} 结构组成，顶部有六个 {Cu(2,2'-bipy)} 片段，它代表了铜封端的 Keggin 型 {TNb12O40} 多氧阴离子的第一个例子。此外，有机胺在研究系统下结构多样性的构建中起着关键作用。