Giant polyniobate clusters based on Nb7O22 (9-) units derived from a Nb6O19 precursor
文献类型：期刊论文
| 作者 | J. Y. Niu ; P. T. Ma ; H. Y. Niu ; J. Li ; J. W. Zhao ; Y. Song ; J. P. Wang |
| 刊名 | Chemistry-a European Journal
 |
| 出版日期 | 2007 |
| 卷号 | 13期号:31页码:8739-8748 |
| 关键词 | cluster compounds magnetic properties niobium polyoxometalates self-assembly crystal-structure structural-characterization molecular growth building-blocks metal-oxide heteropolyniobates chemistry framework complex anions |
| ISSN号 | 0947-6539 |
| 中文摘要 | Rational hexaniobate Lindqvist-type precursor [HNb6O19](7-) with so utilizing different strategies produces a series of giant polyniobate clusters, namely, (H(2)en)(1.25)[Cu(en)(2)(H2O)(2)(-) Cl-4[Nb24O72H21.5]center dot]7H(2)O (1; en: ethyl-enediamine), [Cu(en)(2)](3)[Cu(en)(2)(H2O)](9)(-) [{H2Nb6O19) subset of {[({KNb24O72H10.25} {Cu-(en)(2)})(2){Cu,(en)(3)(H2O)(3)} {Na1.5Cu1.5(H2O)(8)}{Cu(en)(2)}(4)](6))]center dot 144H(2)O (2), K12Na4[H23NaO8Cu24(Nb7O22)(8)]center dot 106 H2O (3), and K16Na12[H9Cu25.5O8(Nb7O22)(8)] 73.5H(2)O (4). Their structures were determined and further characterized by single-crystal X-ray diffraction analysis, IR and Raman spectroscopy, thermogravitnetric analysis (TGA), and ele mental analysis. Structural analyses reveal that compound 2 comprises a giant capsule anion based on a wheel-shaped cluster encapsulating a Lindqvist diprotonated cluster [H2Nb6O19](6-) unit, and forms a honeycomb-like structure with the inclusion of Lindqvist-type anions [H2Nb6O19](6-) in the holes, whereas 3 and 4 represent an un precedented giant cube-shaped framework. All the compounds are built from [Nb7O22](9-) fundamental building blocks. Solution Raman spectroscopy studies of 2 and 3 reveal that the solidstate structures of these polyniobate cluster anions disassemble and exist in the form of the [Nb6O19](8-) unit in solution. Magnetic susceptibility measurement of 3 shows antiferromagnetic coupling interactions between Cu-II ions with the spin-canting phenomenon. |
| 语种 | 英语 |
| 公开日期 | 2013-04-01 |
| 源URL | [http://ir.fjirsm.ac.cn/handle/350002/6540]  |
| 专题 | 福建物质结构研究所_中科院福建物质结构研究所_期刊论文 |
| 推荐引用方式 GB/T 7714 | J. Y. Niu,P. T. Ma,H. Y. Niu,et al. Giant polyniobate clusters based on Nb7O22 (9-) units derived from a Nb6O19 precursor[J]. Chemistry-a European Journal,2007,13(31):8739-8748. |
| APA | J. Y. Niu.,P. T. Ma.,H. Y. Niu.,J. Li.,J. W. Zhao.,...&J. P. Wang.(2007).Giant polyniobate clusters based on Nb7O22 (9-) units derived from a Nb6O19 precursor.Chemistry-a European Journal,13(31),8739-8748. |
| MLA | J. Y. Niu,et al."Giant polyniobate clusters based on Nb7O22 (9-) units derived from a Nb6O19 precursor".Chemistry-a European Journal 13.31(2007):8739-8748. |
入库方式： OAI收割
来源：福建物质结构研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。