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Kwak, Ja Hun
Molecular Catalysis lab
Research Interests
  • Heterogeneous catalysis, molecular catalysis, ASlumima, zeolites

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An isotropic chemical shift-chemical shift anisotropic correlation experiment using discrete magic angle turning

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Title
An isotropic chemical shift-chemical shift anisotropic correlation experiment using discrete magic angle turning
Other Titles
An isotropic chemical shift-chemical shift anisotropic correlation experiment using discrete magic angle turning
Author
Hu, Jian ZhiSears, Jesse A.Kwak, JahunHoyt, David W.Wang, YongPeden, Charles H. F.
Keywords
Isotropic-anisotropic chemical shift correlation; Discrete sample rotation; MAT; MAS; Magnetic susceptibility; High resolution spectrum; In situ detection
Issue Date
2009-05
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Citation
JOURNAL OF MAGNETIC RESONANCE, v.198, no.1, pp.105 - 110
Abstract
An isotropic-anisotropic shift 2D correlation spectroscopy is introduced that combines the advantages of both magic angle turning (MAT) and magic angle hopping (MAH) technologies. In this new approach, denoted DMAT for "discrete magic angle turning", the sample rotates clockwise followed by an anticlockwise rotation of exactly the same amount with each rotation less or equal than 360 degrees but greater than 240 degrees, with the rotation speed being constant only for times related to the evolution dimension. This back and forth rotation is repeated and synchronized with a special radio frequency (RF) pulse sequence to produce an isotropic-anisotropic shift 2D correlation spectrum. For any spin-interaction of rank-2 such as chemical shift anisotropy, isotropic magnetic susceptibility interaction, and residual homo-nuclear dipolar interaction in biological fluid samples, the projection along the isotropic dimension is a high resolution spectrum. Since a less than 360 degrees sample rotation is involved, the design potentially allows for in situ control over physical parameters such as pressure, flow conditions, feed compositions, and temperature so that true in situ NMR investigations can be carried out. Published by Elsevier Inc
URI
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DOI
10.1016/j.jmr.2009.01.027
ISSN
1090-7807
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ECHE_Journal Papers
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