| Abstract
| - The translational motion of benzene molecules on the surfaces of a number of different types of materials,such as silica and a Pt/silica catalyst, has been studied using deuteron NMR techniques. When thetemperature dependence of the correlation time for this motion was correlated using an Arrhenius typeexpression, it was found that a compensation effect was observed. This means that there was a linearrelationship between the activation energy and the natural logarithm of the pre-exponential factor. Theorigin of this effect has been explained by a theory for the molecular motion based on the fractal natureof the surfaces over which the benzene molecules are moving.
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