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Relaxations Studies of 2I Z S Z Spin Order with Signal Enhancement by Coherence Transfer
Author(s) -
Chang WenTsung,
Hwang LianPin,
Wang PeiLejn
Publication year - 1989
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.198900057
Subject(s) - chemistry , heteronuclear molecule , zeeman effect , dipole , pulse sequence , coherence (philosophical gambling strategy) , anisotropy , magnetization transfer , spin (aerodynamics) , polarization (electrochemistry) , dephasing , molecular physics , nuclear magnetic resonance , condensed matter physics , chemical physics , nuclear magnetic resonance spectroscopy , stereochemistry , optics , physics , magnetic field , quantum mechanics , medicine , organic chemistry , magnetic resonance imaging , radiology , thermodynamics
The pulse sequence for generating coherence transfer (or polarization transfer) is invoked to enhance the signal of heteronuclear two spin order (e.g. 2I Z S Z ) in a spin system with CH moiety. This allows the observation of selective conversion of Zeeman order, in a sample with natural abundant 13 C nuclei, into two spin order for measuring cross‐correlation of chemical shift anisotropy and dipole‐dipole interactions. The molecular reorientational correlation time and the orientation of the C–H axis with respect to the principal axes of carboxyl CSA tensor may be determined simultaneously in the relaxation profile of two spin order.