Molecular weights of cyclic and hollow clusters measured by DOSY NMR spectroscopy.
The Stokes-Einstein expression of the diffusion coefficient as a function of the hydrodynamic radius of the diffusing object does not explicitly carry the mass dependency of the object. It is possible to correlate the translational self-diffusion coefficients D with the molecular weight M for an ensemble of cyclic or hollow clusters ranging from about 200 to 30,000 g x mol(-1). From this correlation, the mass of a cluster can be deduced from its diffusion coefficient. Consistency of diffusion as a power law of mass and Stokes-Einstein formulation is completely fulfilled with the selected compounds of this contribution.
Floquet
Sébastien
S
Institut Lavoisier de Versailles, UMR 8180, University of Versailles Saint-Quention en Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles, France. sebastien.floquet@chimie.uvsq.fr
Brun
Sébastien
S
Lemonnier
Jean-François
JF
Henry
Marc
M
Delsuc
Marc-André
MA
Prigent
Yann
Y
Cadot
Emmanuel
E
Taulelle
Francis
F