Abstract
The sodium nitrite NaNO2 incorporated into MCM-41 molecular sieves with pore sizes of 20, 26, and 37 Å has been investigated by 23Na magic-angle spinning NMR spectroscopy. It has been demonstrated that the structure of the crystalline phase of the nitrite in a confined geometry is similar to the structure of bulk nitrite NaNO2. The direct proof of the diffuse melting of sodium nitrite in the pores has been obtained. The NMR signal of the molten sodium nitrite phase has been observed at temperatures close to the completion of the melting.
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Original Russian Text © A.G. Gorchakov, P.S. Sedykh, E.V. Charnaya, S.V. Baryshnikov, Cheng Tien, D. Michel, 2009, published in Fizika Tverdogo Tela, 2009, Vol. 51, No. 10, pp. 2028–2032.
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Gorchakov, A.G., Sedykh, P.S., Charnaya, E.V. et al. MAS NMR studies of nanoporous matrices filled with sodium nitrite. Phys. Solid State 51, 2152–2156 (2009). https://doi.org/10.1134/S1063783409100266
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DOI: https://doi.org/10.1134/S1063783409100266