We have investigated the orientational relaxation in the isotropic phase of a liquid crystal (ZLI-1167) and in the liquid phase of the p-terphenyl (pTP) and p-quater-phenyl (pQP) molecules. The experimental results show new aspects of the liquid molecular orientational dynamics common to all three systems, independently from their chemical nature and state of aggregation. They are characterised by slow collective dynamics in good agreement with the Landau-de Gennes theory of phase transition and by a fast dynamics in fair agreement with the Debye diffusive theory. These new aspects are shown to be related to local order effects.
Local order effect on molecular orientational dynamics: Time resolved non-linear spectroscopy / R. Torre;S. Califano. - In: JOURNAL DE CHIMIE PHYSIQUE ET DE PHYSICO-CHIMIE BIOLOGIQUE. - ISSN 0021-7689. - STAMPA. - 93:(1996), pp. 1843-1857.
Local order effect on molecular orientational dynamics: Time resolved non-linear spectroscopy
TORRE, RENATO;
1996
Abstract
We have investigated the orientational relaxation in the isotropic phase of a liquid crystal (ZLI-1167) and in the liquid phase of the p-terphenyl (pTP) and p-quater-phenyl (pQP) molecules. The experimental results show new aspects of the liquid molecular orientational dynamics common to all three systems, independently from their chemical nature and state of aggregation. They are characterised by slow collective dynamics in good agreement with the Landau-de Gennes theory of phase transition and by a fast dynamics in fair agreement with the Debye diffusive theory. These new aspects are shown to be related to local order effects.File | Dimensione | Formato | |
---|---|---|---|
TorreJChimP-96.pdf
Accesso chiuso
Tipologia:
Versione finale referata (Postprint, Accepted manuscript)
Licenza:
Tutti i diritti riservati
Dimensione
1.2 MB
Formato
Adobe PDF
|
1.2 MB | Adobe PDF | Richiedi una copia |
I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.