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

doi:10.1063/1.4943978

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

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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:

Lim, Ae Ran, E-mail: aeranlim@hanmail.net, E-mail: arlim@jj.ac.kr ^[1]

Department of Science Education and NMR Research Center, Jeonju University, Jeonju 560-759 (Korea, Republic of)

Publication Date:: Tue Mar 15 00:00:00 EDT 2016

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.

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                    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.  https://doi.org/10.1063/1.4943978

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                    Lim, Ae Ran, E-mail: aeranlim@hanmail.net, E-mail: arlim@jj.ac.kr. 2016.  
        "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.  https://doi.org/10.1063/1.4943978.

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@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},

  url          = {https://www.osti.gov/biblio/22611628},
  journal      = {AIP Advances},

  issn         = {2158-3226},

  number       = 3,

  volume       = 6,

  place        = {United States},

  year         = {Tue Mar 15 00:00:00 EDT 2016},

  month        = {Tue Mar 15 00:00:00 EDT 2016}

}

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