A New Nb28 Cluster Based on Tungstophosphate, [{Nb4O6(OH)4}{Nb6P2W12O61}4]36鈥?/sup>
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- 作者：Dongdi Zhang ; Zhijie Liang ; Songqiang Xie ; Pengtao Ma ; Chao Zhang ; Jingping Wang ; Jingyang Niu
- 刊名：Inorganic Chemistry
- 出版年：2014
- 出版时间：September 15, 2014
- 年：2014
- 卷：53
- 期：18
- 页码：9917-9922
- 全文大小：428K
- ISSN：1520-510X
文摘
A structurally intriguing polyanion, [{Nb4O6(OH)4}{Nb6P2W12O61}4]36鈥?/sup> (2), was directly formed by controlling the reaction parameters and characterized by single-crystal X-ray diffraction, IR spectroscopy, and elemental analyses. Polyanion 2 is the first niobium-substituted Wells鈥揇awson-based tetramer and contains the largest Nb28 cluster encapsulated by four hexalacunary Wells鈥揇awson frameworks. The activities of compounds Na12[H24-2]路24H2O (2a), K12[H2P2W12O48]路24H2O, and K7[HNb6O19]路13H2O against three human tumor cell lines were investigated in vitro. The preliminary results revealed that 2a could efficiently inhibit the growth of the human breast cancer MCF-7 cells. Interestingly, the activity of 2a is significantly better than those of the simple reagents.