Photosynthetic glow peaks and their relationship with the free energy changes

摘要: This paper is concerned with relating thermoluminescence to the total free-energy change, EG, involved in detrapping a particular electron-hole pair as photosynthetic sample warmed from an initial low temperature. It extends mathematical discussion of four possible mechanisms introduced earlier [DeVault, Govindjee and Arnold, Proc Nat'l Acad Sci USA 80:983-987 (1983)]; here, attention paid dependence absolute temperature maximum glow-peak, Tin, on EG. The conclusion cases studied that Tm = EG/(kB W) where ZG evaluated at Tm, W complicated function thermodynamic parameters steps mechanism, kB Boltzmann constant. If rate limiting step mechanism not preceded by any which AG appreciably negative, Wis likely have value about 33 approximately proportional Otherwise can become much smaller more strongly dependent no longer YG. These conclusions are significance lending theoretical support practice inferring redox midpoint potential changes shifts Tin.