(33)S MAS NMR of a disordered sulfur-doped silicate: signal enhancement via RAPT, QCPMG and adiabatic pulses
O'Dell, L. A., Klimm, K., Freitas, J. C. C., Kohn, S. C. and Smith, Mark E.. (2009) (33)S MAS NMR of a disordered sulfur-doped silicate: signal enhancement via RAPT, QCPMG and adiabatic pulses. Applied Magnetic Resonance, Vol.35 (No.2). pp. 247-259. ISSN 0937-9347Full text not available from this repository.
Official URL: http://dx.doi.org/10.1007/s00723-008-0159-8
Three different signal enhancement techniques have been applied to (33)S magic-angle spinning nuclear magnetic resonance (MAS NMR) of a disordered silicate containing 1.15 wt% (33)S. Partial saturation of the satellite transitions was achieved using a rotor-assisted population transfer (RAPT) pulse sequence, resulting in a signal enhancement of 1.63, albeit with a slight distortion of the line shape due to selective excitation. Adiabatic inversion of the satellite transitions by various amplitude-and frequency-modulated pulse shapes (such as hyperbolic secant and wideband uniform-rate smooth truncation) was also attempted, resulting in a signal enhancement of up to 1.85, with no apparent line shape distortion. Quadrupolar Carr-Purcell-Meiboom-Gill (QCPMG) and RAPT-QCPMG sequences were also used, both of which yielded spikelet spectra that accurately reflected the MAS line shape with a greatly improved signal-to-noise ratio. It is hoped that this study demonstrates that (33)S solid-state MAS NMR is now feasible even on disordered, low-sulfur-content systems.
|Item Type:||Journal Article|
|Subjects:||Q Science > QC Physics|
|Divisions:||Administration > Vice Chancellor's Office
Faculty of Science > Physics
|Journal or Publication Title:||Applied Magnetic Resonance|
|Official Date:||February 2009|
|Number of Pages:||13|
|Page Range:||pp. 247-259|
|Access rights to Published version:||Restricted or Subscription Access|
|Funder:||Natural Environment Research Council (Great Britain) (NERC), British Council Academic Research Collaboration, Engineering and Physical Sciences Research Council (EPSRC), University of Warwick|
|Grant number:||NE/C510967/1, 1280|
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