1H spin-lattice NMR relaxation in the presence of residual dipolar interactions - Dipolar relaxation enhancement

被引：3

作者：

Kruk, Danuta ^{[1
]}

Rochowski, Pawel ^{[1
,5
]}

Florek-Wojciechowska, Malgorzata ^{[2
]}

Sebastiao, Pedro Jose ^{[3
]}

Lurie, David J. ^{[4
]}

Broche, Lionel M. ^{[4
]}

机构：

[1] Univ Warmia & Mazury, Fac Math & Comp Sci, Sloneczna 54, PL-10710 Olsztyn, Poland

[2] Univ Warmia & Mazury, Dept Phys & Biophys, Oczapowskiego 4, PL-11041 Olsztyn, Poland

[3] Univ Lisbon, Inst Super Tecn, Dept Phys, Av Rovisco Pais, P-1049001 Lisbon, Portugal

[4] Univ Aberdeen, Sch Med Med Sci & Nutr, Biomed Phys, Aberdeen AB25 2ZD, Scotland

[5] Univ Gdansk, Fac Math Phys & Informat, Wita Stwosza 57, PL-80308 Gdansk, Poland

来源：

JOURNAL OF MAGNETIC RESONANCE | 2020年 / 318卷 / 318期

基金：

英国工程与自然科学研究理事会;

关键词：

NMR; Relaxation; Dynamics; TRANSLATIONAL DIFFUSION; DYNAMICS; LIQUIDS; RANGE; WATER; TIMES;

D O I：

10.1016/j.jmr.2020.106783

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

A model of spin-lattice relaxation for spin-1/2 nuclei in the presence of a residual dipole-dipole coupling has been presented. For slow dynamics the model predicts a bi-exponential relaxation at low frequencies, when the residual dipole-dipole interaction dominates the Zeeman coupling. Moreover, according to the model a frequency-specific relaxation enhancement, referred to as Dipolar Relaxation Enhancement (DRE) in analogy to the Quadrupole Relaxation Enhancement (QRE) is expected. The frequency position of the relaxation maximum is determined by the amplitude of the residual dipole-dipole interaction. Experimental examples of relaxation properties that might be attributed to the DRE are presented. The DRE effect has the potential to be exploited, in analogy to QRE, as a unique source of information about molecular dynamics and structure. (C) 2020 Published by Elsevier Inc.

引用

页数：7

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