摘要
Two novel three-dimensional (3D) extended vanadogermanate-based frameworks, [Co(pdn) 2] 3[Co 2(pdn) 4][V 16Ge 4O 44(OH) 2(H 2O)] ·5H 2O (1), [Co 2(en) 3][Co(en) 2] 2[Co(en) 2(H 2O)][V 16Ge 4O 44(OH) 2(H 2O)] ·10.5H 2O (2), (pdn = 1,2-propanediamine, en = ethylenediamine) have been synthesized under hydrothermal conditions via changing the organic amine. X-ray crystal structure analyses reveal that both frameworks are built of [V 16Ge 4O 44(OH) 2(H 2O)] 10- anions and different Co-amine cations. They represent the first example of incorporating elemental Co into the extended vanadogermanate frameworks. Compound 1 shows a 3D framework with NaCl topology based on {V 16Ge 4} clusters as nodes, while compound 2 exhibits a 3D (4,6)-connected network with a Schläfli symbol of (4 6·6 7·8 2) 2(4 2·6 4), which is found for the first time in polyoxovanadate chemistry. The diverse types of metal-organoamine subunits play critical roles in the formation on the final structures. Furthermore, variable temperature susceptibility measurements on compounds 1 and 2 demonstrate the presence of anticipated rare ferrimagnetic behavior.
源语言 | 英语 |
---|---|
页(从-至) | 6122-6129 |
页数 | 8 |
期刊 | Dalton Transactions |
卷 | 41 |
期 | 20 |
DOI | |
出版状态 | 已出版 - 28 5月 2012 |