Phase transition and temperature dependent electronic state of an organic ferroelectric, phenazine-chloranilic acid (1: 1)

T. Asaji, J. Seliger, V. Žagar, M. Sekiguchi, J. Watanabe, Kazuma Gotoh, Hiroyuki Ishida, S. Vrtnik, J. Dolinšek

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The isotope effect of hydrogen motion in an organic ferroelectric, phenazine (Phz)-chloranilic acid (H2ca and D2ca for normal and deuterated compounds, respectively) co-crystal, was studied by 35Cl nuclear quadrupole resonance (NQR). Besides a ferroelectric transition at Tc ≤ 253K (303K), a neutral-to-ionic transition was found below 170K (200K) for Phz-H2ca (Phz-D2ca). 1H-14N nuclear quadrupole double resonance measurements were also made in order to study the temperature dependent electronic state of Phz-(H/D)2ca. 14N NQR parameters suggested that donor orbital populations of the two nitrogen atoms in a phenazine molecule become nonequivalent (1.78 and 1.97) in the ferroelectric phase, while they are both equal to 1.89 in the paraelectric phase. In the ionic phase of Phz-D 2ca, which was obtained by cooling below 188K, they became 1.50 and 1.95, suggesting a proton transfer from D2ca toPhz.

Original languageEnglish
Article number226203
JournalJournal of Physics Condensed Matter
Volume19
Issue number22
DOIs
Publication statusPublished - Jun 6 2007

Fingerprint

nuclear quadrupole resonance
Electronic states
Nuclear quadrupole resonance
Ferroelectric materials
Phase transitions
acids
Acids
electronics
isotope effect
nitrogen atoms
Proton transfer
quadrupoles
cooling
orbitals
Temperature
Isotopes
temperature
protons
hydrogen
Nitrogen

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Phase transition and temperature dependent electronic state of an organic ferroelectric, phenazine-chloranilic acid (1 : 1). / Asaji, T.; Seliger, J.; Žagar, V.; Sekiguchi, M.; Watanabe, J.; Gotoh, Kazuma; Ishida, Hiroyuki; Vrtnik, S.; Dolinšek, J.

In: Journal of Physics Condensed Matter, Vol. 19, No. 22, 226203, 06.06.2007.

Research output: Contribution to journalArticle

Asaji, T. ; Seliger, J. ; Žagar, V. ; Sekiguchi, M. ; Watanabe, J. ; Gotoh, Kazuma ; Ishida, Hiroyuki ; Vrtnik, S. ; Dolinšek, J. / Phase transition and temperature dependent electronic state of an organic ferroelectric, phenazine-chloranilic acid (1 : 1). In: Journal of Physics Condensed Matter. 2007 ; Vol. 19, No. 22.
@article{c791dd0f182f4c6fa2a96ad65a679258,
title = "Phase transition and temperature dependent electronic state of an organic ferroelectric, phenazine-chloranilic acid (1: 1)",
abstract = "The isotope effect of hydrogen motion in an organic ferroelectric, phenazine (Phz)-chloranilic acid (H2ca and D2ca for normal and deuterated compounds, respectively) co-crystal, was studied by 35Cl nuclear quadrupole resonance (NQR). Besides a ferroelectric transition at Tc ≤ 253K (303K), a neutral-to-ionic transition was found below 170K (200K) for Phz-H2ca (Phz-D2ca). 1H-14N nuclear quadrupole double resonance measurements were also made in order to study the temperature dependent electronic state of Phz-(H/D)2ca. 14N NQR parameters suggested that donor orbital populations of the two nitrogen atoms in a phenazine molecule become nonequivalent (1.78 and 1.97) in the ferroelectric phase, while they are both equal to 1.89 in the paraelectric phase. In the ionic phase of Phz-D 2ca, which was obtained by cooling below 188K, they became 1.50 and 1.95, suggesting a proton transfer from D2ca toPhz.",
author = "T. Asaji and J. Seliger and V. Žagar and M. Sekiguchi and J. Watanabe and Kazuma Gotoh and Hiroyuki Ishida and S. Vrtnik and J. Dolinšek",
year = "2007",
month = "6",
day = "6",
doi = "10.1088/0953-8984/19/22/226203",
language = "English",
volume = "19",
journal = "Journal of Physics Condensed Matter",
issn = "0953-8984",
publisher = "IOP Publishing Ltd.",
number = "22",

}

TY - JOUR

T1 - Phase transition and temperature dependent electronic state of an organic ferroelectric, phenazine-chloranilic acid (1

T2 - 1)

AU - Asaji, T.

AU - Seliger, J.

AU - Žagar, V.

AU - Sekiguchi, M.

AU - Watanabe, J.

AU - Gotoh, Kazuma

AU - Ishida, Hiroyuki

AU - Vrtnik, S.

AU - Dolinšek, J.

PY - 2007/6/6

Y1 - 2007/6/6

N2 - The isotope effect of hydrogen motion in an organic ferroelectric, phenazine (Phz)-chloranilic acid (H2ca and D2ca for normal and deuterated compounds, respectively) co-crystal, was studied by 35Cl nuclear quadrupole resonance (NQR). Besides a ferroelectric transition at Tc ≤ 253K (303K), a neutral-to-ionic transition was found below 170K (200K) for Phz-H2ca (Phz-D2ca). 1H-14N nuclear quadrupole double resonance measurements were also made in order to study the temperature dependent electronic state of Phz-(H/D)2ca. 14N NQR parameters suggested that donor orbital populations of the two nitrogen atoms in a phenazine molecule become nonequivalent (1.78 and 1.97) in the ferroelectric phase, while they are both equal to 1.89 in the paraelectric phase. In the ionic phase of Phz-D 2ca, which was obtained by cooling below 188K, they became 1.50 and 1.95, suggesting a proton transfer from D2ca toPhz.

AB - The isotope effect of hydrogen motion in an organic ferroelectric, phenazine (Phz)-chloranilic acid (H2ca and D2ca for normal and deuterated compounds, respectively) co-crystal, was studied by 35Cl nuclear quadrupole resonance (NQR). Besides a ferroelectric transition at Tc ≤ 253K (303K), a neutral-to-ionic transition was found below 170K (200K) for Phz-H2ca (Phz-D2ca). 1H-14N nuclear quadrupole double resonance measurements were also made in order to study the temperature dependent electronic state of Phz-(H/D)2ca. 14N NQR parameters suggested that donor orbital populations of the two nitrogen atoms in a phenazine molecule become nonequivalent (1.78 and 1.97) in the ferroelectric phase, while they are both equal to 1.89 in the paraelectric phase. In the ionic phase of Phz-D 2ca, which was obtained by cooling below 188K, they became 1.50 and 1.95, suggesting a proton transfer from D2ca toPhz.

UR - http://www.scopus.com/inward/record.url?scp=34248667026&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34248667026&partnerID=8YFLogxK

U2 - 10.1088/0953-8984/19/22/226203

DO - 10.1088/0953-8984/19/22/226203

M3 - Article

AN - SCOPUS:34248667026

VL - 19

JO - Journal of Physics Condensed Matter

JF - Journal of Physics Condensed Matter

SN - 0953-8984

IS - 22

M1 - 226203

ER -