Phase-shift presaturation in one- and two-dimensional NMR experiments

A simple and efficient technique, called phase-shift presaturation, for solvent suppression in one-and two-dimensional NMR experiments is proposed and tested. The solvent signal can be considerably suppressed when the traditional presaturation technique is modified by a π/2 shift of the rf phase dur...

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Bibliographic Details
Published inChemical physics letters Vol. 227; no. 6; pp. 645 - 650
Main Authors Mao, Xi-an, Ye, Chao-hui
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.09.1994
Elsevier Science
Subjects
Atomic and molecular physics
Atomic, molecular and charged-particle sources and detectors
Exact sciences and technology
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Molecular properties and interactions with photons
Nuclear resonance and relaxation
Physics
Hydrogen 1
Disaccharides
Aqueous solutions
COSY sequence
Saccharose
NMR spectra
Experimental study
Organic compounds
Two dimension spectrometry
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Summary:A simple and efficient technique, called phase-shift presaturation, for solvent suppression in one-and two-dimensional NMR experiments is proposed and tested. The solvent signal can be considerably suppressed when the traditional presaturation technique is modified by a π/2 shift of the rf phase during low-power irradiation. The long pulse is thus divided into two periods. In the first period, which is much longer than the second one, first-order suppression is achieved, but some residual of the magnetization is spin-locked. The spin-locked components can, however, be largely suppressed in the second period with an orthogonal rf phase.
ISSN:0009-2614
1873-4448
DOI:10.1016/0009-2614(94)00862-0