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Title: Study of the ferroelastic phase transition in the tetraethylammonium compound [N(C{sub 2}H{sub 5}){sub 4}]{sub 2}ZnBr{sub 4} by magic-angle spinning and static NMR

Abstract

The ferroelastic phase transition of tetraethylammonium compound [N(C{sub 2}H{sub 5}){sub 4}]{sub 2}ZnBr{sub 4} at the phase transition temperature (T{sub C}) = 283 K was characterized by magic-angle spinning (MAS) and static nuclear magnetic resonance (NMR), and confirmed by optical polarizing spectroscopy. The structural geometry near T{sub C} was studied in terms of the chemical shifts and the spin-lattice relaxation times T{sub 1ρ} in the rotating frame for {sup 1}H MAS NMR and {sup 13}C cross-polarization (CP)/MAS NMR. The two inequivalent ethyl groups were distinguishable in the {sup 13}C NMR spectrum, and the T{sub 1ρ} results indicate that they undergo tumbling motion above T{sub C} in a coupled manner. From the {sup 14}N NMR results, the two nitrogen nuclei in the N(C{sub 2}H{sub 5}){sub 4}{sup +} ions were distinguishable above T{sub C}, and the splitting in the spectra below T{sub C} was related to the ferroelastic domains with different orientations.

Authors:
 [1]
  1. Department of Science Education and NMR Research Center, Jeonju University, Jeonju 560-759 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22611628
Resource Type:
Journal Article
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 6; Journal Issue: 3; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2158-3226
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CARBON 13; CHEMICAL SHIFT; HYDROGEN 1; IONS; NITROGEN 14; NMR SPECTRA; NUCLEAR MAGNETIC RESONANCE; ORIENTATION; PHASE TRANSFORMATIONS; POLARIZATION; SPECTROSCOPY; SPIN; SPIN-LATTICE RELAXATION; TEMPERATURE RANGE 0273-0400 K; TRANSITION TEMPERATURE

Citation Formats

Lim, Ae Ran, E-mail: aeranlim@hanmail.net, E-mail: arlim@jj.ac.kr. Study of the ferroelastic phase transition in the tetraethylammonium compound [N(C{sub 2}H{sub 5}){sub 4}]{sub 2}ZnBr{sub 4} by magic-angle spinning and static NMR. United States: N. p., 2016. Web. doi:10.1063/1.4943978.
Lim, Ae Ran, E-mail: aeranlim@hanmail.net, E-mail: arlim@jj.ac.kr. Study of the ferroelastic phase transition in the tetraethylammonium compound [N(C{sub 2}H{sub 5}){sub 4}]{sub 2}ZnBr{sub 4} by magic-angle spinning and static NMR. United States. doi:10.1063/1.4943978.
Lim, Ae Ran, E-mail: aeranlim@hanmail.net, E-mail: arlim@jj.ac.kr. Tue . "Study of the ferroelastic phase transition in the tetraethylammonium compound [N(C{sub 2}H{sub 5}){sub 4}]{sub 2}ZnBr{sub 4} by magic-angle spinning and static NMR". United States. doi:10.1063/1.4943978.
@article{osti_22611628,
title = {Study of the ferroelastic phase transition in the tetraethylammonium compound [N(C{sub 2}H{sub 5}){sub 4}]{sub 2}ZnBr{sub 4} by magic-angle spinning and static NMR},
author = {Lim, Ae Ran, E-mail: aeranlim@hanmail.net, E-mail: arlim@jj.ac.kr},
abstractNote = {The ferroelastic phase transition of tetraethylammonium compound [N(C{sub 2}H{sub 5}){sub 4}]{sub 2}ZnBr{sub 4} at the phase transition temperature (T{sub C}) = 283 K was characterized by magic-angle spinning (MAS) and static nuclear magnetic resonance (NMR), and confirmed by optical polarizing spectroscopy. The structural geometry near T{sub C} was studied in terms of the chemical shifts and the spin-lattice relaxation times T{sub 1ρ} in the rotating frame for {sup 1}H MAS NMR and {sup 13}C cross-polarization (CP)/MAS NMR. The two inequivalent ethyl groups were distinguishable in the {sup 13}C NMR spectrum, and the T{sub 1ρ} results indicate that they undergo tumbling motion above T{sub C} in a coupled manner. From the {sup 14}N NMR results, the two nitrogen nuclei in the N(C{sub 2}H{sub 5}){sub 4}{sup +} ions were distinguishable above T{sub C}, and the splitting in the spectra below T{sub C} was related to the ferroelastic domains with different orientations.},
doi = {10.1063/1.4943978},
journal = {AIP Advances},
issn = {2158-3226},
number = 3,
volume = 6,
place = {United States},
year = {2016},
month = {3}
}