TY - JOUR
T1 - Microscopic evidence of a metallic state in the one-pot organic conductor ammonium tetrathiapentalene carboxylate
AU - Nakamura, Toshikazu
AU - Furukawa, Ko
AU - Terauchi, Takeshi
AU - Kobayashi, Yuka
N1 - Publisher Copyright:
© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2015/8/1
Y1 - 2015/8/1
N2 - 1H NMR (nuclear magnetic resonance) and high-field ESR (electron spin resonance) measurements were carried out for self-doped organic conductors in the ammonium tetrathiapentalene carboxylate (TTPCOO)2[(NH41+)1-x(NH30)x ] system. While the pristine TTPCOOH molecule is closed-shell, self-doped carriers are generated by substitution of the carboxyl proton by (NH30) and (NH41+), which can be regarded as a charge reservoir. The π-extended system TTPCOO has a uniaxial g -tensor, indicating a 2D isotropic structure such as a herring-bone-like or parallel cross donor arrangement. The NMR-relaxation rate indicated the Korringa relation in the temperature dependence, and the ESR linewidth followed the Elliot mechanism. Both of these observations provide supporting evidence for a stable metallic state. In this paper, we introduce self-doped organic conductors as a branch of materials design, and emphasize that advanced magnetic resonance measurements are powerful tools for developing functional materials.
AB - 1H NMR (nuclear magnetic resonance) and high-field ESR (electron spin resonance) measurements were carried out for self-doped organic conductors in the ammonium tetrathiapentalene carboxylate (TTPCOO)2[(NH41+)1-x(NH30)x ] system. While the pristine TTPCOOH molecule is closed-shell, self-doped carriers are generated by substitution of the carboxyl proton by (NH30) and (NH41+), which can be regarded as a charge reservoir. The π-extended system TTPCOO has a uniaxial g -tensor, indicating a 2D isotropic structure such as a herring-bone-like or parallel cross donor arrangement. The NMR-relaxation rate indicated the Korringa relation in the temperature dependence, and the ESR linewidth followed the Elliot mechanism. Both of these observations provide supporting evidence for a stable metallic state. In this paper, we introduce self-doped organic conductors as a branch of materials design, and emphasize that advanced magnetic resonance measurements are powerful tools for developing functional materials.
KW - (TTPCOO)<inf>2</inf>NH<inf>4</inf>
KW - Electron spin resonance
KW - Nuclear magnetic resonance
KW - Organic conductors
KW - Self-doping
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U2 - 10.1002/pssr.201510206
DO - 10.1002/pssr.201510206
M3 - Article
AN - SCOPUS:84940713575
VL - 9
SP - 480
EP - 484
JO - Physica Status Solidi - Rapid Research Letters
JF - Physica Status Solidi - Rapid Research Letters
SN - 1862-6254
IS - 8
ER -