Patrut, A., Margineanu, D., Lowy, D. A., Kogerlew, P., Schmidtmann, M. and Bogge, H. (2007) Spectroscopic, magnetic and crystal structure investigation of a new pseudo-Dawson nano-sized polyoxometalate cluster with mixed addenda. Journal of Optoelectronics and Advanced Materials, 9(12), pp. 3921-3926.
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Abstract
A new nano-sized polyoxometalate cluster was synthesized as a neutral salt. The cluster, which corresponds to the formula Na-2(NH4)(6)[(H3SbVW17O60)-V-III-W-IV]center dot 14H(2)O, contains a heteroatom Sb-III with an unshared electron pair and mixed addenda, i.e., W and V-IV. Structural investigation of the new substance was performed by FT-IR, Raman, UV-Vis-NIR spectroscopy, magnetic susceptibility measurements and by X-ray diffraction. Single-crystal X-ray diffraction analysis showed that the [(H3SbVW17O60)-V-III-W-IV](8-) polyoxometalate molecule is made up of two halves, each being of trilacunary Keggin-type, namely B alpha-[SbM9O33] and B alpha-[H3M9O33], linked by corners and edges. The Sb-III heteroatom is statistically distributed between the two halves. The Sb-III heteroatom is tricoordinated, forming an unusual trigonal SbO3 pyramid in the [SbM9O33] unit. The paramagnetic V-IV metal centre is disordered over all 18 addenda positions. It is proposed that this structure, called initially non-Dawson, should be renamed as pseudo-Dawson.
| Item Type: | Articles |
|---|---|
| Keywords: | CLUSTER CRYSTAL Crystal structure CRYSTAL-STRUCTURE DIFFRACTION ELECTRON FORMULA FTIR FTIR spectroscopy METAL metal cluster MOLECULE paramagnetism POLYOXOMETALATE RAMAN SALT SPECTROSCOPY Structure UNIT X-RAY X-ray diffraction X-ray structure X-RAY-DIFFRACTION |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Schmidtmann, Mr Marc |
| Authors: | Patrut, A., Margineanu, D., Lowy, D. A., Kogerlew, P., Schmidtmann, M., and Bogge, H. |
| College/School: | College of Science and Engineering > School of Chemistry |
| Journal Name: | Journal of Optoelectronics and Advanced Materials |
| ISSN: | 1454-4164 |
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