Improving the H-1 indirect dimension resolution of 2D CRAMPS NMR spectra: A simulation and experimental investigation
authors Siegel, R; Mafra, L; Rocha, J
nationality International
journal SOLID STATE NUCLEAR MAGNETIC RESONANCE
author keywords Solid-state NMR; High-resolution; CRAMPS; DUMBO; H-1; z-Rotation; MAS; Simulation; Windowed; Windowless
keywords SOLID-STATE NMR; NUCLEAR-MAGNETIC-RESONANCE; MULTIPLE-PULSE NMR; ANGLE-SPINNING FREQUENCIES; HIGH-ORDER; SPECTROSCOPY; SEQUENCES; MAS; KHZ
abstract An experimental and simulation investigation regarding the effect of various CRAMPS parameters (delays interleaved with the decoupling shape, z-rotation symmetry and offset frequency) on the DUMBO decoupling performance is presented using two model compounds, glycine and tyrosine Although the conclusions of this work may be extended to the other homonuclear-decoupling schemes, this work focuses essentially on the effect of adding interleaved delays to DUMBO decoupling during the indirect dimension using different 2D pulse-scheme architectures. While the simulations revealed an increasing loss of the spectral resolution with longer delays (from 0 to 6 mu s), the experimental 2D H-1 DUMBO NMR correlation spectra revealed that the inclusion of delays, during the indirect dimension, improves the H-1 resolution whether the z-rotation symmetry was used or not. The best experimental spectra are obtained when z-rotation symmetry and windows are combined. (C) 2011 Elsevier Inc. All rights reserved.
publisher ACADEMIC PRESS INC ELSEVIER SCIENCE
issn 0926-2040
year published 2011
volume 39
issue 3-4
beginning page 81
ending page 87
digital object identifier (doi) 10.1016/j.ssnmr.2011.04.003
web of science category Chemistry, Physical; Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Spectroscopy
subject category Chemistry; Physics; Spectroscopy
unique article identifier WOS:000292361300007
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journal impact factor 2.674
5 year journal impact factor 2.365
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