Effects of Driving ForceEnergy(∆V)^° (eV) on the Rates of Electron-Transfer Reactions at Metal/LiquidInterface

Hadi, J.M. AL-Agealy; Waleed Bdaiwi Salih; Taif, S. Murdhi

Hadi, J.M. AL-Agealy Department of Physics, College of Education for Pure Science Ibn-ALHaitham, University of Baghdad.
Waleed Bdaiwi Salih Department of Physics, College of Education for Pure Science, University of Anbar.
Taif, S. Murdhi Department of Physics, College of Education for Pure Science, University of Anbar..

Keywords: Driving Force, Electron transfer, Metal/Liquid Interface.

Abstract

Electron transfer (ET) in metal/liquid interface exhibits dependence on the driving free-energy〖∆V〗^°. It has been studied depending on the quantum theory. The driving force energies 〖∆V〗^° for the electron transfer reaction are calculated as a function of the reorganization E_met^liq, and absorption energy E_abswhen a light is incident on the donor-acceptor system. The results show that the driving force energy 〖∆V〗^°for electrons increase with increases absorption energy and decreasing with wave length and reorganization energyE_met^liq. A MATLAP program has been used to calculate the reorganization energyE_met^liq, driving free energy〖∆V〗^°, and the rate constant of electron transferR_ET. The present results show that the rate constant R_ETincreases with the increasing of the reorganization energy E_met^liq, and with the decreasing of the driving force energy〖∆V〗^°. Probability of electron transfer occurs in most polar solvent f(n,ε) system and has low driving force energy.