S-33 solid state NMR of sulphur speciation in silicate glasses
UNSPECIFIED. (2004) S-33 solid state NMR of sulphur speciation in silicate glasses. SOLID STATE NUCLEAR MAGNETIC RESONANCE, 26 (3-4). pp. 203-208. ISSN 0926-2040Full text not available from this repository.
Official URL: http://dx.doi.org/10.1016/j.ssnmr.2004.03.007
S-33 solid-state NMR is reported from some model crystalline sulphides, sulphates, sulphites and thiosulphates. This is the first report of S-33 NMR signals of the latter two species from a solid. Good quality spectra, which have distinct, well separated shift ranges can be identified for all these groupings, except for sulphites and, hydrogen sulphites whose resonances are very broad. Nonetheless the presence of sulphites and hydrogen sulphites can be confirmed from their characteristic sharp, intense time domain echoes. S-33 MAS NMR is also applied to a range of dry and hydrous silicate glasses with similar to1 wt% 99 at% S-33-enriched sulphur. It is clear that in all these glasses sulphate is present, and in mixed cation systems there is some evidence of preferential association of sulphate with a specific cation. In a dry potassium silicate glass sample two resolved S-33 resonances are observed, a sulphate, and the second from thiosulphate. Hence solid state S-33 NMR is shown to be a feasible probe that can be applied to this problem that can readily distinguish different sulphur species. (C) 2004 Elsevier Inc. All rights reserved.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry
Q Science > QC Physics
|Journal or Publication Title:||SOLID STATE NUCLEAR MAGNETIC RESONANCE|
|Publisher:||ACADEMIC PRESS INC ELSEVIER SCIENCE|
|Number of Pages:||6|
|Page Range:||pp. 203-208|
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