Entropy and enthalpy contributions to the kinetics of proton coupled electron transfer to the Mn4O4(O2PPh2)6 cubane.

Carrell TG, Smith PF, Dennes J, Dismukes CG.  2014.  

Journal:

Physical chemistry chemical physics : PCCP

Volume Number:

16

Issue Number:

24

Pages:

11843-7

Abstract:

The dependence of rate, entropy of activation, and ((1)H/(2)H) kinetic isotope effect for H-atom transfer from a series of p-substituted phenols to cubane Mn4O4L6 (L = O2PPh2) () reveals the activation energy to form the transition state is proportional to the phenolic O-H bond dissociation energy. New implications for water oxidation and charge recombination in photosystem II are described.

Citation:
Carrell TG, Smith PF, Dennes J, Dismukes CG.  2014.  Entropy and enthalpy contributions to the kinetics of proton coupled electron transfer to the Mn4O4(O2PPh2)6 cubane.. Physical chemistry chemical physics : PCCP. 16(24):11843-7.