Premium
Activationless electron transfer processes in biological systems
Author(s) -
Buhks Ephraim,
Jortner Joshua
Publication year - 1980
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(80)81323-8
Subject(s) - tel aviv , electron transfer , chemistry , physics , computer science , library science
Electron transfer (ET) processes between ions in solutions [ 11, as well as in biological systems [2,3], can adequately be described within a unified theoretical framework in terms of non-adiabatic multiphonon non-radiative processes [2-41. A central prediction of the theory [2-41 is that at sufficiently low temperatures the ET rate is constant and independent of temperature manifesting the effects of nuclear tunnelling, while at high temperatures the rate exhibits the conventional Arrehnius-type activated temperature dependence. This pattern has been observed for the DeVault-Chance ET process between cytochrome and the reaction centre in chromatium [ 51. Experimental studies of the primary charge separation steps in bacterial photosynthesis [6,7] have established that several of the elementary ET processes are temperature independent over a wide temperature range [8]. The ET process between bacteriopheophtin (BPh) and ubiquionone10 (Q) [ 6-81: