Entropy and enthalpy contributions to the kinetics of proton coupled electron transfer to the Mn4O4(O2PPh 2)6 cubane

Thomas G. Carrell, Paul F. Smith, Joseph Dennes, G Charles Dismukes

Research output: Contribution to journalArticle

Abstract

The dependence of rate, entropy of activation, and (1H/ 2H) kinetic isotope effect for H-atom transfer from a series of p-substituted phenols to cubane Mn4O4L6 (L = O2PPh2) (1) 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.

Original languageEnglish
Pages (from-to)11843-11847
Number of pages5
JournalPhysical Chemistry Chemical Physics
Volume16
Issue number24
DOIs
Publication statusPublished - Jun 28 2014

Fingerprint

cubane
Photosystem II Protein Complex
Phenols
Entropy
Isotopes
isotope effect
phenols
Genetic Recombination
Protons
Enthalpy
electron transfer
Activation energy
enthalpy
Chemical activation
activation
dissociation
Electrons
entropy
activation energy
Atoms

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Physics and Astronomy(all)
  • Medicine(all)

Cite this

Entropy and enthalpy contributions to the kinetics of proton coupled electron transfer to the Mn4O4(O2PPh 2)6 cubane. / Carrell, Thomas G.; Smith, Paul F.; Dennes, Joseph; Dismukes, G Charles.

In: Physical Chemistry Chemical Physics, Vol. 16, No. 24, 28.06.2014, p. 11843-11847.

Research output: Contribution to journalArticle

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