A TEST OF DIELECTRIC FRICTION MODELS - ROTATIONAL DIFFUSION OF FLUORENES IN DIMETHYL-SULFOXIDE

The measurement of the rotational relaxation time of seven fluorene de rivatives in dimethyl sulfoxide and paraffin oil is used to assess the generality of a recently proposed model of dielectric friction. This work shows that the friction experienced by these solute molecules is reproduced quite well at a qualitative level. Although agreement betwe en the experiment and the model can also be captured by adjusting cert ain parameters, these adjustments are not always clearly correlated wi th molecular properties.