Developing ¹¹B solid state MAS NMR methods to characterise medium range structure in borates

Authors: Barrow, Nathan S.; Ashbrook, Sharon E.; Brown, Steven P.; Holland, Diane

Source: Physics and Chemistry of Glasses - European Journal of Glass Science and Technology Part B, Volume 50, Number 3, June 2009 , pp. 201-204(4)

Publisher: Society of Glass Technology

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Abstract:

¹¹B magic angle spinning solid state NMR spectra of polycrystalline lithium diborate are presented. Second order quadrupolar broadened resonances corresponding to three- (B3) and four-coordinated (B4) boron nuclei overlap for a magnetic field of 7·05 T, but are resolved for 14·1 T. Cross peaks linking the B3 and B4 resonances are observed in two-dimensional homonuclear spin diffusion spectra. There is a need to develop analytical methods for the characterisation of medium range structure in borate glasses. In this respect, such solid state NMR methods have potential for identifying the presence of specific superstructural units.

Document Type: Research article

Publication date: 2009-06-01