1 H NMR in a quasi-one-dimensional zig-zag spin chain of hambergite, Be 2 BO 3 (OH).

Autor: Bochkin GA; Institute of Problems of Chemical Physics, Chernogolovka 142432, Moscow Oblast, Russia., Fel'dman EB; Institute of Problems of Chemical Physics, Chernogolovka 142432, Moscow Oblast, Russia., Kuznetsova EI; Institute of Problems of Chemical Physics, Chernogolovka 142432, Moscow Oblast, Russia., Lazarev ID; Institute of Problems of Chemical Physics, Chernogolovka 142432, Moscow Oblast, Russia; Faculty of Fundamental Physical-Chemical Engineering, Lomonosov Moscow State University, GSP-1, Moscow 119991, Russia., Vasil'ev SG; Institute of Problems of Chemical Physics, Chernogolovka 142432, Moscow Oblast, Russia. Electronic address: viesssw@mail.ru., Volkov VI; Institute of Problems of Chemical Physics, Chernogolovka 142432, Moscow Oblast, Russia.
Jazyk: angličtina
Zdroj: Journal of magnetic resonance (San Diego, Calif. : 1997) [J Magn Reson] 2020 Oct; Vol. 319, pp. 106816. Date of Electronic Publication: 2020 Sep 02.
DOI: 10.1016/j.jmr.2020.106816
Abstrakt: One-dimensional spin chains are important testbeds for the investigation of quantum many-body systems. Here, we introduce a new quasi-one-dimensional chain of spin-1/2 1 H nuclei in hambergite (Be 2 BO 3 (OH)) crystal. The distinctive feature of hambergite is the zig-zag arrangement of the spins in the chains compared to the systems reported earlier. A single crystal of hambergite was investigated experimentally using 1 H nuclear magnetic resonance at different orientations in the external magnetic field. The experimental spectra were compared with the Van Vleck's second moments calculated from the structural data. For the orientation of the chain along the external magnetic field the resonance resembles that of the linear spin chains and the calculated contributions to the second moment from spins within one chain of hambergite amount to 96%. For other orientations the spectra demonstrate features specific to the zig-zag chain. Our results show that 1 H nuclei in hambergite crystals could serve a good model of a well-isolated zig-zag spin chain.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2020 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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