Abstract
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.
Original language | English |
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Pages (from-to) | 480-484 |
Number of pages | 5 |
Journal | Physica Status Solidi - Rapid Research Letters |
Volume | 9 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2015 Aug 1 |
Externally published | Yes |
Keywords
- (TTPCOO)<inf>2</inf>NH<inf>4</inf>
- Electron spin resonance
- Nuclear magnetic resonance
- Organic conductors
- Self-doping
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics