Use of the pseudophase model in the interpretation of reactivity under restricted geometry conditions. An application to the study of the [Ru(NH(3))(5)pz](2+) + S(2)O(8)(2-) electron-transfer reaction in different microheterogeneous systems.
The title reaction has been studied under restricted geometry conditions, comprising aqueous solutions of a polymer (DNA), cyclodextrins, and dendrimers as well as (CTA)Cl micellar solutions and sodium bis(2-ethylhexyl)sulfosuccinate (AOT)/water/oil microemulsions. The results are interpreted by taking as a general basis the pseudophase model, modified in some cases in order to take into account the specificity of the reaction medium. These modifications describe the anti-cooperative character of the binding of the substrates to the surfaces and the changes of the electric potential at the surfaces. The conclusion is that the pseudophase model is a powerful tool for the interpretation of kinetic data in the reaction media considered in this work, provided that the specificity of these media were incorporated into the model.
López-Cornejo
Pilar
P
Departamento de Química Física, Facultad de Química, Universidad de Sevilla, C/Prof. García González s/n, 41012 Sevilla, Spain.
Pérez
Pilar
P
García
Francisco
F
de la Vega
Reyes
R
Sánchez
Francisco
F
D003505:Cyclodextrins / Q000737:chemistry*; D004247:DNA / Q000737:chemistry*; D004583:Electrons; D007700:Kinetics; D008823:Micelles; D008956:Models, Chemical; D009942:Organometallic Compounds / Q000737:chemistry; D011719:Pyrazines / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*; D012996:Solutions; D013461:Sulfur Oxides / Q000737:chemistry*; D013499:Surface Properties; D014867:Water / Q000737:chemistry
D003505:Cyclodextrins; D008823:Micelles; D009942:Organometallic Compounds; D011719:Pyrazines; D012996:Solutions; D013461:Sulfur Oxides; D014867:Water; D012428:Ruthenium; D004247:DNA