Abstract
On account of essential needs for deploring the mechanism of electron transfer reactions of either homo- or heterogeneous nature in solution, on the basis of theories originally developed by Marcus- Dogonadze- Hush and Mulliken- Cerischer and others, experiments are carried out using potassium-hexacyanoferrate (II, III) redox couple in aquous solutions, at 298K and under pressure upto 100MPa. Variations in ΔV# for the transition state comlex and between the reactants and products are monitored, inorder to determine the ate of electron transfer in the total reaction take place. The sign of ΔV# is positive and decreases in the order of K+>Na+>Li+, however, ΔV# obtains a negative sign for all measurements performed in solutions free of the alkali metal rations, which itself proves the concept of ion association in the transition state. The accuracy of ΔV# value is ±1%. A series of experimetts have also been conducted regarding the mechanism of electrical conduction in condesed maters such as the coducting polymers, metallic oxides- chalcogenides- & oxyhalide of interest and on photochemical processes in solution as well. The dynamic effects of pressure on resistivity, doping-undoping and intercalation reactions together with phase transition and some structural aspects of some organic & inorganic substances are studied.
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