1H multiple quantum NMR in alternating quasi-one-dimensional spin chains of hambergite

被引：3
|
作者：
Bochkin, G. A. [1 ]
Fel'dman, E. B. [1 ]
Kiryukhin, D. P. [1 ]
Kushch, P. P. [1 ]
Vasil'ev, S. G. [1 ]
机构：
[1] Russian Acad Sci, Inst Problems Chem Phys, Chernogolovka, Russia
来源：
JOURNAL OF MAGNETIC RESONANCE | 2023年 / 350卷
基金：
俄罗斯基础研究基金会;
关键词：
One-dimensional spin systems; Zigzag spin chain; Hambergite; Single crystal 1 H NMR; MQ NMR; Many -body quantum systems; Gamma irradiation; NUCLEAR-MAGNETIC-RESONANCE; DIPOLAR RELAXATION; DYNAMICS; COHERENCES;
D O I：
10.1016/j.jmr.2023.107415
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
Multiple quantum (MQ) dynamics was investigated in quasi-one-dimensional 1H zigzag spin chains in hambergite (Be2BO3OH) single crystals. Due to the non-linear arrangement of the spins, dipolar coupling strengths alternate along the chain. To solve the problem of MQ NMR experiments taking too much time due to extremely long 1H spin-lattice relaxation times, the samples were exposed to gamma irradiation to produce the defects accelerating the relaxation. The influence of the radiation dose was investigated. The experimental dependencies of MQ coherence intensities on the MQ excitation time in alternating spin chains were obtained and compared with the theory for inhomogeneous spin chains with nearest neighbor interactions developed earlier. The correspondence of the observed MQ dynamics to the alter-nating spin chain was demonstrated.(c) 2023 Elsevier Inc. All rights reserved.
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页数：9
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