Method for the Evaluation of the Reorganization Energy of Electron Transfer Reactions Produced under Restricted Geometry Conditions
摘要:
The kinetics of the electron transfer reactions between S2O82- and the complexes (Ru(NH3)(5)L)(2+) (L = pyridine, pyrazine, and 4-cyanopyridine) have been studied in micellar (SDS) solutions. A method for the evaluation of the reorganization energy of these reactions, based on the comparison of their rate constants, is proposed. From the results obtained, we concluded that the observed rate constants go through a minimum for the surfactant concentration in which the reorganization energy goes through a maximum. The method can be applied to any kind of restricted geometry conditions.
The kinetics of the electrontransfer reactions between [Co(C2O4)3]3− and different ruthenium complexes [Ru(NH3)5L]2+ (L = pyridine, pyrazine and 4-cyanopyridine) have been studied in water–methanol mixtures. A method for the evaluation of the reorganization energy of these reactions, based on comparison of their rate constants, is proposed. The results showed a decrease of the rate constants and a decrease
[Co(C 2 O 4)3 ] 3-与不同钌络合物[Ru(NH 3)5 L] 2+之间的电子转移反应动力学(L =吡啶,吡嗪和4-氰基吡啶)已在水-甲醇混合物中进行了研究。提出了一种基于反应速率常数比较的重组反应能量的评价方法。结果表明,当介质的介电常数降低时,速率常数降低,重组能降低。此行为是根据使用经典连续体方法获得的行为得出的。不同方法之间发现的细微差异可能与介质特定效果的存在有关。