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          Institute: MPI für medizinische Forschung     Collection: Abteilung Biophysik     Display Documents



ID: 22941.0, MPI für medizinische Forschung / Abteilung Biophysik
Deuterium stimulated-echo type PGSE NMR experiments for measuring diffusion: Application to a thermotropic liquid crystal
Translation of Title:Deuterium stimulated-echo type PGSE NMR experiments for measuring diffusion: Application to a thermotropic liquid crystal
Authors:Dvinskikh, Sergey V.; Furó, Istvan; Sandström, Dick; Maliniak, Arnold; Zimmermann, Herbert
Language:English
Date of Publication (YYYY-MM-DD):2001-11
Title of Journal:Journal of Magnetic Resonance
Journal Abbrev.:J. Magn. Reson.
Volume:153
Start Page:83
End Page:91
Review Status:Peer-review
Audience:Experts Only
Intended Educational Use:No
Abstract / Description:The accessibility of molecular self-diffusion coefficients in anisotropic materials, such as liquid crystals or solids, by stimulated-echo-type 2H PGSE NMR is examined. The amplitude and phase modulation of the signal in the stimulated-echo-type sequence by the static quadrupole coupling during the encoding/decoding delays is suppressed by adjusting the pulse flip angles and the phase cycle. For nuclei that experience both nonnegligible quadrupole and dipole couplings, the application of magic echoes during the evolution periods of stimulated echo is demonstrated as a helpful technique in the case of slow diffusion. These findings are demonstrated by experimental results in the thermotropic liquid crystal of partially deuterated 8CB. The obtained diffusion coefficients are also compared to data obtained by a 1H homonuclear-decoupling-type PGSE NMR method in the same material.
Free Keywords:2H PGSE NMR; quadrupolar coupling; magic echo; liquid crystal; 8CB
External Publication Status:published
Document Type:Article
Communicated by:Wulf Kaiser
Affiliations:MPI für medizinische Forschung/Abteilung Biophysik/
Identifiers:URI:http://www.sciencedirect.com/science?_ob=ArticleUR... [Abstract]
URI:http://www.sciencedirect.com/science?_ob=MImg&_ima... [Fulltext PDF]
DOI:10.1006/jmre.2001.2418
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