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Titolo:
CATIONIC SELF-DIFFUSION IN SOLID CHOLINE PERCHLORATE STUDIED BY H-1-NMR
Autore:
ISHIDA H; KATO M; ONO H; IKEDA R;
Indirizzi:
OKAYAMA UNIV,FAC SCI,DEPT CHEM OKAYAMA 700 JAPAN UNIV TSUKUBA,DEPT CHEM TSUKUBA IBARAKI 305 JAPAN
Titolo Testata:
Zeitschrift fur Naturforschung. A, A journal of physical sciences
fascicolo: 8-9, volume: 52, anno: 1997,
pagine: 637 - 639
SICI:
0932-0784(1997)52:8-9<637:CSISCP>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
NUCLEAR-MAGNETIC-RESONANCE; IONIC PLASTIC PHASE; F-19 NMR; N-14 NMR; TETRAFLUOROBORATE; TRANSITIONS; DYNAMICS; MOTIONS; H-1-NMR; CS-133;
Keywords:
IONIC PLASTIC PHASE; SELF-DIFFUSION; CRYSTAL STRUCTURE; NUCLEAR MAGNETIC RESONANCE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
20
Recensione:
Indirizzi per estratti:
Citazione:
H. Ishida et al., "CATIONIC SELF-DIFFUSION IN SOLID CHOLINE PERCHLORATE STUDIED BY H-1-NMR", Zeitschrift fur Naturforschung. A, A journal of physical sciences, 52(8-9), 1997, pp. 637-639

Abstract

The H-1 spin-lattice and spin-spin relaxation times, and the second moment of the H-1 NMR linewidth of choline perchlorate, [(CH3)(3)NCH2CH2OH]ClO4, were measured in its highest-temperature solid phase, i.e. above 275 K. X-ray powder patterns taken at ca. 380 K revealed that in this phase the crystal has a CsCl-type cubic structure (a = 6.326(4) Angstrom and Z = 1). From H-1 NMR experiments it was found that the cations in this phase undergo isotropic rotation and translational self-diffusion. From the H-1 T-1 measurements, the activation energies of the cationic rotation and self-diffusion were evaluated to be 21.4 +/- 0.4 and 62 +/- 3 kJ mol(-1) respectively.

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Documento generato il 24/09/20 alle ore 10:39:29