- 作者: 黃文樞 ; 李良修 ; 喻維仁
- 作者服務機構: 中山大學化學系
- 中文摘要: Qualitative and quantitative criteria of irreversibility of electron transfer in cyclic voltammetry(CV) of tricarbonyl(N,N-diphenylcyclohexadienecarboxamide) iron complexes were investigated. The measurement of the heterogeneous rate constants for electron transfer according to CV data over an extended range of free energy change(.DELTA.G) for these complexes are described. Kinetic analyses of the electrochemical technique demonstrates that when the applied potential exceeds the standard potential E.degree., the experimental rate constant k/sub e/ represents an accurate measurement of the intrinsic rate constant k/sub 1/ for electron transfer. However, as the applied potential is less than E.degree., the reversibility of the electron -transfer process becomes increasingly more important, and the rate constants for reverse electron transfer k/sub -1/ and decomposition k/sub 2/ of the electrogenerated intermediate have to be taken into account.
- 英文摘要: --
- 中文關鍵字: Electrooxidation; Electrochemical Reversibility; Electron Transfer; Cyclic Voltammetry; Kinetic Analyses; Rate Constant; Free Energy
- 英文關鍵字: 電氧化;電化學可逆性;電子轉移;循環伏安法;動力學分析;速率常數;自由能