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Internal dynamics of hydroxymethyl rotation from CH2 cross-correlated dipolar relaxation in methyl-β-d-glucopyranoside

Authors :
Kövér, Katalin E.
Batta, Gyula
Kowalewski, Jozef
Ghalebani, Leila
Kruk, Danuta
Source :
Journal of Magnetic Resonance. Apr2004, Vol. 167 Issue 2, p273. 9p.
Publication Year :
2004

Abstract

Conventional relaxation parameters (<f>T1−1</f>, <f>T2−1</f>, and NOE), obtained at different temperatures and magnetic fields, are reported for the hydroxymethyl (C6) carbon in methyl-β-d-glucopyranoside in a D2O/DMSO cryosolvent. These data are interpreted with the Lipari–Szabo model. In addition, two-field measurements of longitudinal and spin-locked relaxation rates related to the cross-correlated carbon–proton dipole–dipole interactions for the same carbon are reported. The complete data set consisting the conventional and cross-correlated relaxation parameters is interpreted using a new “hybrid” approach, in which the Lipari–Szabo model for the auto-correlated spectral densities is combined with the two-site jump model for the cross-correlated spectral densities, with the global correlation time as a common parameter. The two-site jump rates thus obtained are in reasonable agreement with the ultrasonic relaxation measurements, and have reasonable temperature dependence. [Copyright &y& Elsevier]

Details

Language :
English
ISSN :
10907807
Volume :
167
Issue :
2
Database :
Academic Search Index
Journal :
Journal of Magnetic Resonance
Publication Type :
Academic Journal
Accession number :
12707786
Full Text :
https://doi.org/10.1016/j.jmr.2004.01.003