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Tracer diffusion of the tris(1,10-phenanthroline)iron(II) cation in aqueous salt solutions. Effect of hydrophobic interactions
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1988
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Magnetic PropertiesEngineeringCation–cation InteractionsChemistrySolution (Chemistry)Chemical EngineeringMineral-fluid InteractionAnalytical ChemistryTracer DiffusionDiffusion Coefficient–viscosity ProductMaterials ScienceInorganic ChemistryIon ExchangeTracer Diffusion CoefficientsChemisorptionPhysical ChemistryAqueous Salt SolutionsDiffusion ResistanceHydrophobic InteractionsChemical Kinetics
Tracer diffusion coefficients for the Fe(phen)32+ ion (phen = 1,10-phenanthroline) have been measured in aqueous solutions containing Ni(phen)3SO4, Bu4NBr, MgSO4 and NaBr, respectively, at 298.2 K. The diffusion coefficient–viscosity product, Dη, is found to decrease with increasing concentration of Ni(phen)3SO4, but the concentration dependence of Dη is very weak in other salt solutions. The results suggest the presence of cation–cation interactions between Fe(phen)32+ and Ni(phen)32+.