Eur. Phys. J. B 30, 519-525 (2002)
https://doi.org/10.1140/epjb/e2002-00409-1

Fast intramolecular dynamics of triphenyl phosphite investigated by ²H NMR

Laboratoire de Dynamique et Structure des Matériaux Moléculaires, Université de Lille 1, Cité Scientifique, 59655 Villeneuve d'Ascq Cedex, France

Corresponding author: ^a ronan.lefort@univ-lille1.fr

Received: 28 May 2002
Revised: 1 October 2002
Published online: 31 December 2002

Abstract

The first analysis of rapid intramolecular motions of triphenyl phosphite by ²H NMR is presented. The fragile slowing down of the primary relaxation is followed by a solid-echo method. The occurrence of a fast reorientation of the phenyl side groups is demonstrated in the supercooled liquid state, identified as a two-fold flip on the basis of simple lineshape simulations. Coexistence of both static and motionally averaged components in “two phase” spectra indicate a broad distribution of correlation times for this relaxation. This dynamical behavior is shown to persist in the glacial phase.