Mikosch, W.; Dorfmuller, Th.; Eimer, W. published the artcile< Rotational motion of charged molecules in aqueous solutions. A change in the diffusion mechanism>, Computed Properties of 112-63-0, the main research area is rotational motion charged mol aqueous solution; viscosity fluorescence charged mol aqueous solution; diffusion Stokes Einstein Debye equation.
The rotational motion of the anions polyphenyl 2 (PP2) and pyrene tetrasulfonate (PTS) was studied as a function of the solvent viscosity by time-resolved fluorescence depolarization spectroscopy using the single photon counting technique. The viscosity was varied by changing the temperature and the composition of the water-glycerol mixtures, resp. At low viscosity the reorientational behavior of PP2 and PTS is well described by the Stokes-Einstein-Debye (SED) equation under stick boundary conditions. With increasing viscosity (ç?é?25 cP) however the rotational motion did no longer follow the SED predictions. Instead, we observed a much faster relaxation time, approaching an asymptotic value at very high viscosities. In the high viscosity regime microscopic collisional effects rather than the macroscopic hydrodynamics drag of the solvent determines the reorientational dynamics of the solute mols.
Journal of Chemical Physics published new progress about Diffusion. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Computed Properties of 112-63-0.
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