Abstract
The interface between two immiscible liquids with immobilized photosynthetic pigments can serve as the simplest model of a biological membrane convenient for the investigation of photoprocesses accompanied by spatial separation of charges. As it follows from thermodynamics, if the resolvation energies of substrates and products are very different, the interface between two immiscible liquids may act as a catalyst. Theoretical aspects of charge transfer reactions at oil/water interfaces are discussed. Conditions under which the free energy of activation of the interfacial reaction of electron transfer decreases are established. The activation energy of electron transfer depends on the charges of the reactants and dielectric permittivity of the non-aqueous phase. This can be useful when choosing a pair of immiscible solvents to decrease the activation energy of the reaction in question or to inhibit an undesired process. Experimental interfacial catalytic systems are discussed. Amphiphilic molecules such as chlorophyll or porphyrins were studied as catalysts of electron transfer reactions at the oil/water interface.
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Volkov, A.G., Deamer, D.W. (1997). Redox chemistry at liquid/liquid interfaces. In: Texter, J. (eds) Amphiphiles at Interfaces. Progress in Colloid & Polymer Science, vol 103. Steinkopff. https://doi.org/10.1007/3-798-51084-9_3
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DOI: https://doi.org/10.1007/3-798-51084-9_3
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