Spectroscopic, magnetic and crystal structure investigation of a new pseudo-Dawson nano-sized polyoxometalate cluster with mixed addenda

Patrut A, Margineanu D, Lowy DA, Kögerler P, Schmidtmann M, Bögge H (2007)
JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS 9(12): 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.
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Patrut A, Margineanu D, Lowy DA, Kögerler P, Schmidtmann M, Bögge H. Spectroscopic, magnetic and crystal structure investigation of a new pseudo-Dawson nano-sized polyoxometalate cluster with mixed addenda. JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS. 2007;9(12):3921-3926.
Patrut, A., Margineanu, D., Lowy, D. A., Kögerler, P., Schmidtmann, M., & Bögge, 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), 3921-3926.
Patrut, A., Margineanu, D., Lowy, D. A., Kögerler, P., Schmidtmann, M., and Bögge, 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, 3921-3926.
Patrut, A., et al., 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), p 3921-3926.
A. Patrut, et al., “Spectroscopic, magnetic and crystal structure investigation of a new pseudo-Dawson nano-sized polyoxometalate cluster with mixed addenda”, JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS, vol. 9, 2007, pp. 3921-3926.
Patrut, A., Margineanu, D., Lowy, D.A., Kögerler, P., Schmidtmann, M., Bögge, H.: 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, 3921-3926 (2007).
Patrut, Adrian, Margineanu, D., Lowy, D. A., Kögerler, Paul, Schmidtmann, Marc, and Bögge, Hartmut. “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 (2007): 3921-3926.
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