Volume 66, Number 3, May 2004
|Page(s)||378 - 384|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 April 2004|
Controlling and measuring conformational properties of -alkane ultraconfined in urea: A high-pressure NMR study
Groupe Matière Condensée et Matériaux, UMR6626 au CNRS, Université Rennes I Campus de Beaulieu, 35042 Rennes Cedex, France
Corresponding author: email@example.com
Accepted: 2 March 2004
high-resolution solid-state NMR experiments were performed on the intergrowth compound /urea at ambient temperature and helium pressure up to 4500 in a home-made NMR probe. These experiments show that the populations of chain ends gauche conformers can be reversibly modified with pressure. The trans-gauche volume change , free-energy change as well as the contribution of the conformational defects to the chain spring constant were estimated for the first time for an ultraconfined n-alkane.
PACS: 68.65.-k – Low-dimensional, mesoscopic, and nanoscale systems: structure and nonelectronic properties / 76.60.-k – Nuclear magnetic resonance and relaxation / 36.20.Ey – Conformation (statistics and dynamics)
© EDP Sciences, 2004
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