Two-Dimensional Free Energy Surfaces for Electron Transfer Reactions in Solution. (15th October 2008)

• Record Type: Journal Article
• Authors: Murata, Shigeo; El-Kemary, Maged; Tachiya, M.
• Other Names: Abdel-Mottaleb Mohamed Sabry Academic Editor.
• Is Part Of: International journal of photoenergy. Volume 2008(2008)
• Publication Date: 2008-10-15
• Subjects: Photochemistry -- Periodicals; Photobiology -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Photochimie; Photobiologie; Chimie physique et théorique; Chemistry, Physical and theoretical; Photobiology; Photochemistry; Electronic journals; Periodicals; 541.35
• DOI: 10.1155/2008/150682
• Languages: English
• ISSNs: 1110-662X

Abstract

Abstract : Change in intermolecular distance between electron donor (D) and acceptor (A) can induce intermolecular electron transfer (ET) even in nonpolar solvent, where solvent orientational polarization is absent. This was shown by making simple calculations of the energies of the initial and final states of ET. In the case of polar solvent, the free energies are functions of both D-A distance and solvent orientational polarization. On the basis of 2-dimensional free energy surfaces, the relation of Marcus ET and exciplex formation is discussed. The transient effect in fluorescence quenching was measured for several D-A pairs in a nonpolar solvent. The results were analyzed by assuming a distance dependence of the ET rate that is consistent with the above model.