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RESEARCH PRODUCT
Determination of Kinetic and Thermochemical Parameters of a Substitution Reaction at a Square-Planar Palladium(II) Complex in Water/AOT/n-Heptane Microemulsions by Flow Microcalorimetry
Turco V. LiveriTurco M.l. Liverisubject
Exothermic reactionIsothermal microcalorimetryHeptaneChemistryEnthalpySolvationEthylenediamineSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsBiomaterialschemistry.chemical_compoundColloid and Surface ChemistryReaction rate constantOrganic chemistryPhysical chemistryMicroemulsiondescription
Abstract The substitution reaction [Pd(bipy)(en)] 2+ + en → [Pd(en) 2 ] 2+ + bipy (where bipy = 2,2′-bipyridine and en = ethylenediamine) has been studied in water and water/AOT/ n -heptane microemulsions at various values of the molar ratio R ( R = [water]/[AOT]) by flow microcalorimetry. From calorimetric data, molar enthalpies of reaction and rate constants were obtained. These quantities indicate that, by increasing R , the reaction becomes less exothermic and its rate constant decreases, trending to the value observed in water. These features can be reasonably rationalized in terms of the peculiar solvation state of reactants inside the AOT reversed micelles and/or the peculiar physicochemical properties of micellar core.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1995-12-01 | Journal of Colloid and Interface Science |