A Sphere-Interface Model for the Solvent Reorganization Energy in an Electron Transfer Reaction at the Solvent/Conductor Interface

作者：Tu Zhe-Yan; Li Xiang-Yuan^*; Fu Ke-Xiang; He Fu-Cheng

来源：Acta Physico - Chimica Sinica, 2009, 25(1): 1-5.

DOI：10.3866/PKU.WHXB20090101

• Non-equilibrium solvation
• Constrained equilibrium
• Solvent reorganization energy
• Interface

Based on the continuum medium theory and the basic principles of thermodynamics we used an extra electric field E-ex to change the non-equilibrium salvation state 2[E-2(non), D-2(non)] to a constrained equilibrium state [E-2(center dot), D-2(center dot)]. A novel expression of solvent reorganization energy was deduced. Furthermore, by adopting the sphere-interface approximation we deduced the formula for the solvent reorganization energy of the electron transfer reaction occurring at the interface of the conductor and the solvent. Compared to the traditional Marcus model our result was scaled by a factor of (epsilon(delta)-epsilon(alpha rho))/epsilon(alpha rho)(epsilon(delta)-1) which is about 0.5 in a polar solvent. C343(Coumarin 343)-TiO2 was used as an example and the analytical results using our model were discussed with respect to experimental measurements.

• 出版日期2009-1
• 单位四川大学