Thermal ET rate constant

The effect of anion binding on k is not nearly as great. The data in Fig. 6 show that for both metals, there is less than a 50% decrease in the thermal ET rate constant between hybrids containing neutral and anionic ligands. 

Our early reports of the I A reaction in [ZnCcP, Cc] complexes were interpreted within the context of the simple ET cycle. Scheme I [8b, c]. As noted above, there are two limiting cases for this scheme, i) The I A reaction is slow I(t) appears with the triplet decay rate constant kp and disappears with the thermal ET rate constant k. ii) It is rapid here I(t) appears with k and disappears with kp. We reported that ZnCcP complexes with heterologous Cc s [8d] and with aliphatic Phe-82 mutants of yeast Cc [8b] fell into the former class, while the intermediate for fungal Cc appears rapidly [8d]. 

A standard point of reference for thinking about the thermal ET rate constant ( ET) is given by Equation (3.75) [5,11] ... 

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