Study of xenon binding in cryptophane-A using laser-induced NMR polarization enhancement

TitleStudy of xenon binding in cryptophane-A using laser-induced NMR polarization enhancement
Publication TypeJournal Article
Year of Publication1999
AuthorsLuhmer M., Goodson B.M, Song Y.Q, Laws D.D, Kaiser L., Cyrier M.C, Pines A
JournalJournal of the American Chemical Society
Volume121
Issue14
Pagination3502-3512
Date PublishedApr 14
ISBN Number0002-7863
Accession NumberWOS:000079884800033
KeywordsSPECTROSCOPY
Abstract

In solution, spin-polarization transfer between laser-polarized xenon and the hydrogen nuclei of nearby molecules leads to signal enhancements in the resolved H-1 NMR spectrum, offering new opportunities for probing the chemical environment of xenon atoms. Following binding of laser-polarized xenon to molecules of cryptophane-A, selective enhancements of the H-1 NMR signals were observed. A theoretical framework for the interpretation of such experimental results is provided, and the spin polarization-induced nuclear Overhauser effects are shown to yield information about the molecular environment of xenon. The observed selective H-1 enhancements allowed xenon-proton internuclear distances to be estimated. These distances reveal structural characteristics of the complex, including the preferred molecular conformations adopted by cryptophane-A upon binding of xenon.

URL<Go to ISI>://WOS:000079884800033
DOI10.1021/Ja9841916
Short TitleStudy of xenon binding in cryptophane-A using laser-induced NMR polarization enhancement
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