Hanna, J.V. and Smith, Mark E. and Whitfield, Harold J. (1996) Multiple quantum magic angle spinning NMR detection of impurity phases in Na2HfO3. Journal of the American Chemical Society, 118 (24). pp. 5772-5777. ISSN 0002-7863. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)
One-dimensional Na-23 magic angle spinning (1D-MAS) NMR spectra obtained at 9.4 and 14.1 T from Na2HfO3 reveal three distinct sodium sites with widely differing NMR interaction parameters which can be accurately and unambiguously extracted. On exposure to atmospheric H2O and CO2 minor (similar to 5%) impurities can be detected by 1D-MAS. Complete resolution of the different sites is possible by use of the recently introduced two-dimensional multiple quantum technique which is used for the first time here to detect minority phases. The reaction mechanism is further elucidated by obtaining an alternative perspective from O-17 MAS Nh IR which reveals an amorphous HfO2-related phase is also formed during the decomposition process.
|Subjects:||Q Science > QD Chemistry|
|Divisions:||Faculties > Science Technology and Medical Studies > School of Physical Sciences|
|Depositing User:||R.F. Xu|
|Date Deposited:||02 Jun 2009 11:24|
|Last Modified:||18 Jul 2014 15:52|
|Resource URI:||https://kar.kent.ac.uk/id/eprint/19232 (The current URI for this page, for reference purposes)|