Photocurrent and the Gibbs Free Energy of Electron Transfer

Correlation between Photocurrent and the Gibbs Free Energy of Electron Transfer 

The Gibbs free energy of electron transfer is determined by the formal electron transfer potentials associated with the excited state of the metalloporphyrin ( p, ) and the redox couple in the organic phase 

Independent measurements of each of these parameters have allowed the evaluation of Equation (11.52) giving as a result = 0-64 0.02 

This value can be used as a reference for estimating ttie formal redox potential of other species in DCE as summarised in Table 11.1 . The redox potentials estimated for the intermediate charge separated state associated with the ZnTPPS-ZnTMPyP heterodimer (see reaction 11.5) are also included. 

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