O'Dell, L. A. and Klimm, K. and Freitas, J. C. C. and 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, 35 (2). pp. 247-259. ISSN 1613-7507
Full text not available from this repository.Abstract
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: | Article |
|---|---|
| Journal or Publication Title: | Applied Magnetic Resonance |
| Uncontrolled Keywords: | INTEGER QUADRUPOLAR NUCLEI ; SOLID-STATE NMR ; HYPERBOLIC SECANT PULSES ; DOUBLE FREQUENCY SWEEPS ; NATURAL-ABUNDANCE ; SENSITIVITY ENHANCEMENT ; SATELLITE TRANSITIONS ; POPULATION TRANSFER ; COUPLING-CONSTANTS ; SPECTRA |
| Subjects: | UNSPECIFIED |
| Departments: | VC's Office |
| ID Code: | 52833 |
| Deposited By: | ep_importer_pure |
| Deposited On: | 28 Feb 2012 13:38 |
| Refereed?: | Yes |
| Published?: | Published |
| Last Modified: | 26 Jul 2012 20:09 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/52833 |
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