Influence of Chemical Exchange among Homonuclear Spins in Heteronuclear Coherence-Transfer Experiments in Liquids

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Abstract

An analysis is presented of the effects of chemical exchange on the coherence-transfer efficiencies of two different types of solution-state NMR methodologies, represented by the heteronuclear single-quantum coherence (HSQC) experiment and the heteronuclear cross-polarization technique. The cross-polarization experiment is demonstrated both experimentally and theoretically to have significant advantages over the free-precession-type sequences such as HSQC in the presence of chemical reorganization processes. Special emphasis is given to a I1I2S spin system in which the two I spins are undergoing mutual exchange.

Original languageEnglish (US)
Pages (from-to)97-106
Number of pages10
JournalJournal of Magnetic Resonance, Series A
Volume116
Issue number1
DOIs
StatePublished - Sep 1995
Externally publishedYes

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Chemical Phenomena
cross polarization
Liquids
liquids
Polarization
Experiments
precession
Nuclear magnetic resonance
methodology
nuclear magnetic resonance

ASJC Scopus subject areas

  • Engineering(all)

Cite this

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abstract = "An analysis is presented of the effects of chemical exchange on the coherence-transfer efficiencies of two different types of solution-state NMR methodologies, represented by the heteronuclear single-quantum coherence (HSQC) experiment and the heteronuclear cross-polarization technique. The cross-polarization experiment is demonstrated both experimentally and theoretically to have significant advantages over the free-precession-type sequences such as HSQC in the presence of chemical reorganization processes. Special emphasis is given to a I1I2S spin system in which the two I spins are undergoing mutual exchange.",
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AB - An analysis is presented of the effects of chemical exchange on the coherence-transfer efficiencies of two different types of solution-state NMR methodologies, represented by the heteronuclear single-quantum coherence (HSQC) experiment and the heteronuclear cross-polarization technique. The cross-polarization experiment is demonstrated both experimentally and theoretically to have significant advantages over the free-precession-type sequences such as HSQC in the presence of chemical reorganization processes. Special emphasis is given to a I1I2S spin system in which the two I spins are undergoing mutual exchange.

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