Gated electron transfer

As discussed later, if binding can occur at more than one site, then more than one rate may occur. Alternatively, if the sites interconvert, this interconversion may modulate the electron transfer rate by modulating the distance. This would represent one limiting example of gated electron transfer as discussed by Hoffman and Ratner [4], and demonstrated by Pardue [5]. 

Doron A, Portnoy M, Lion-Dagan M, Katz E, Willner I. Amperometric transduction and amplification of optical signals recorded by a phenoxynaphthacenequinone monolayer electrode photochemical and pH-gated electron transfer. / Am Chem Soc 1996 118 8937 14. 

Hoffman BM, Ratner MA. Gated electron transfer when are observed rates controlled by conformational interconversion J Am Chem Soc 1987 109 6237-43. 

Liu L, Hong J, Ogawa MY. Gated electron transfer as a probe of the configurational dynamics of peptide-protein complexes. J Am Chem Soc 2004 126 50-1. 

Intermediates, Gated Electron-transfer and Vibrational Excited States... 

Walter, D. G., Campbell, D. J., and Mirkin, C. A. Photon-gated electron transfer in rwo-component self-assembled monolayers. /. Phys. Chem. B 1999,103, 402-405. 

Avila, A., Gregory, B.W., Niki, K., and Cotton, T.M. (2000) An electrochemical approach to investigate gated electron transfer using a physiological model system cytochrome c immobilized on carboxylic acid-terminated alkanethiol self-assembled monolayers on gold electrodes. Journal of Physical Chemistry... 

U., Utesch, T., Mroginski, M.A., Hildebrandt, P., and Weidinger, I.M. (2008) Gated electron transfer of yeast iso-1 cytochrome c on self-assembled monolayer-coated electrodes. Journal of Physical Chemistry ,112,15202-15211. 

Kranich, A., Naumann, H., Molina-Heredia, F.P., Moore, H.)., Lee, T.R., Lecomte, S., de la Rosa, M.A., Hildebrandt, P., and Murgida, D.H. (2009) Gated electron transfer of cytochrome c(5) at biomimetic interfaces a time-resolved SERR study. Physical Chemistry Chemical Physics, 11, 7390-7397. 

The kinetic data and the information about linkage isomerization and redox potentials demonstrated that electron transfer takes place by path A, where [Ru(NH3)5(n-buso)]2+ is first oxidized by cis-[Ru(NH3)4(pyridine 4-carboxya-mide)2]3+ against a 24 kj mol-1 up-hill electron transfer with the rate constant over 50 M-1 s-1 and, in the second step, the Ru3+SO isomerizes to Ru3+OS with a rate constant of 4.3 s-1. This conclusion is interesting to consider as the mechanism not only for biological but also for the gated electron transfer systems. 

Coupling to Vibrational Modes Gated Electron Transfer and Vibronic Issues... 

Electron transfer coupled to large-amplitude changes in low-frequency vibrational modes, intermediates, and gated electron transfer... 

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