Chadwick, A.V. and Poplett, I.J.F. and Maitland, D.T.S. and Smith, M.E. (1998) Oxygen speciation in nanophase MgO from solid-state O-17 NMR. Chemistry of Materials, 10 (3). pp. 864-70. ISSN 0897-4756.
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Nanocrystalline MgO has been sol-gel manufactured to give a range of crystallite sizes from 1.8 to 35 nm as determined by powder X-ray diffraction. A multinuclear magnetic resonance approach using C-13, O-17, and Mg-25 provides information on the atonic scale structure. It is found that despite extensive hydrolysis that -CH3 fragments persist until extensive calcination has been performed. In O-17 magic angle spinning NMR spectra three signals are detected that are assigned to MgO-like, a surface species, and a unit also like MgO but with carbon as the third nearest neighbor, demonstrating the high sensitivity of the O-17 chemical shift to local structure and its ability to detect medium-range order.
|Subjects:||Q Science > QD Chemistry
Q Science > QC Physics
|Divisions:||Faculties > Science Technology and Medical Studies > School of Physical Sciences|
|Depositing User:||I. Ghose|
|Date Deposited:||04 Apr 2009 08:33|
|Last Modified:||04 Apr 2009 08:33|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/17633 (The current URI for this page, for reference purposes)|
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