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Picosecond transient grating study of the rotational diffusion of a ruthenium complex in solution

Authors
Journal
Chemical Physics Letters
0009-2614
Publisher
Elsevier
Publication Date
Volume
228
Identifiers
DOI: 10.1016/0009-2614(94)00914-7

Abstract

Abstract The rotational diffusion time of ruthenium (II)-bis(2,2′-bipyridine) (2,2′-biquinoleine) has been measured in polar solvents of different viscosity. The rotational dynamics can be explained in terms of the Stokes—Einstein—Debye hydrodynamics theory under stick boundary condition by considering the rotating body as a prolate spheroid enclosing the complex. This overestimates the intrinsic molecular volume by a factor of 1.5. The difference can be accounted for by solvent molecules intercalated in the interligand space and stabilized by electrostatic interaction with the charge of the metal atom.

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