The Library
Improving the sensitivity of J coupling measurements in solids with application to disordered materials
Tools
Guerry, Paul, Brown, Steven P. and Smith, Mark E. (2016) Improving the sensitivity of J coupling measurements in solids with application to disordered materials. AIP Advances, 6 (5). 055008. doi:10.1063/1.4948965 ISSN 2158-3226.
|
PDF
WRAP_Guerry_1.4948965.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (1176Kb) | Preview |
Official URL: http://dx.doi.org/10.1063/1.4948965
Abstract
It has been shown previously that for magic angle spinning (MAS) solid state NMR the refocused INADEQUATE spin-echo (REINE) experiment can usefully quantify scalar (J) couplings in disordered solids. This paper focuses on the two z filter components in the original REINE pulse sequence, and investigates by means of a product operator analysis and fits to density matrix simulations the effects that their removal has on the sensitivity of the experiment and on the accuracy of the extracted J couplings. The first z filter proves unnecessary in all the cases investigated here and removing it increases the sensitivity of the experiment by a factor ∼1.1–2.0. Furthermore, for systems with broad isotropic chemical shift distributions (namely whose full widths at half maximum are greater than 30 times the mean J coupling strength), the second z filter can also be removed, thus allowing whole-echo acquisition and providing an additional √2 gain in sensitivity. Considering both random and systematic errors in the values obtained, J couplings determined by fitting the intensity modulations of REINE experiments carry an uncertainty of 0.2–1.0 Hz (∼1−10 %).
Item Type: | Journal Article | ||||||||
---|---|---|---|---|---|---|---|---|---|
Subjects: | Q Science > QC Physics | ||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
Library of Congress Subject Headings (LCSH): | Particles (Nuclear physics), Solids, Nuclear magnetic resonance spectroscopy | ||||||||
Journal or Publication Title: | AIP Advances | ||||||||
Publisher: | American Institute of Physics | ||||||||
ISSN: | 2158-3226 | ||||||||
Official Date: | 4 May 2016 | ||||||||
Dates: |
|
||||||||
Volume: | 6 | ||||||||
Number: | 5 | ||||||||
Article Number: | 055008 | ||||||||
DOI: | 10.1063/1.4948965 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 20 June 2016 | ||||||||
Date of first compliant Open Access: | 20 June 2016 | ||||||||
Funder: | Engineering and Physical Sciences Research Council (EPSRC), University of Lancaster | ||||||||
Grant number: | EP/C000633/1 |
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |
Downloads
Downloads per month over past year