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Titolo:
Isotope effects on the dynamics of a supercooled van der Waals liquid
Autore:
Jorg, T; Bohmer, R; Sillescu, H; Zimmermann, H;
Indirizzi:
Univ Mainz, Inst Chem Phys, D-55099 Mainz, Germany Univ Mainz Mainz Germany D-55099 Inst Chem Phys, D-55099 Mainz, Germany Max Planck Inst Med Forsch, D-69120 Heidelberg, Germany Max Planck Inst Med Forsch Heidelberg Germany D-69120 eidelberg, Germany
Titolo Testata:
EUROPHYSICS LETTERS
fascicolo: 6, volume: 49, anno: 2000,
pagine: 748 - 753
SICI:
0295-5075(200003)49:6<748:IEOTDO>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
NUCLEAR-MAGNETIC-RESONANCE; SPIN-LATTICE RELAXATION; GLASS-TRANSITION; ORTHO-TERPHENYL; MOLECULAR-DYNAMICS; DIFFUSION; NMR; REORIENTATIONS; ORTHOTERPHENYL; MODEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Jorg, T Univ Mainz, Inst Chem Phys, D-55099 Mainz, Germany Univ Mainz Mainz Germany D-55099 em Phys, D-55099 Mainz, Germany
Citazione:
T. Jorg et al., "Isotope effects on the dynamics of a supercooled van der Waals liquid", EUROPH LETT, 49(6), 2000, pp. 748-753

Abstract

Deuteron magnetic resonance was used to study three differently isotope-labeled species of the fragile glass-forming liquid ortho-terphenyl. The calorimetric glass transition of the isotope deuterated only at the central phenyl ring is significantly lower than that of the perdeuterated one. It is shown that while the ortho-terphenyl molecule is not as rigid as previously often assumed, its overall reorientation geometry is independent of deuteration. The characteristic jump angles are found to increase with temperature, thus resolving an apparent discrepancy previously noted when comparing typical jump sizes from NMR with other data.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 06:19:30