A test of continuum models for dielectric friction. Rotational diffusion of phenoxazine dyes in dimethylsulfoxide

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Abstract
Rotational diffusion times for three mechanically similar phenoxazine dyes with differing electronic properties were measured. These studies probe the importance of dipole/dipole and ion/dipole couplings to the friction. The experimental results are compared with the predictions of available continuum theories of dielectric friction. Future directions for a more realistic model of dielectric friction are discussed.