PHOTOSELECTION EFFECTS IN LASER FLASH-INDUCED SPIN-POLARISED EPR SPECTRA OF THE RADICAL PAIR STATE P+QA- IN RHODOBACTER SPHAEROIDES REACTION CENTERS
1999
Abstract The spin-polarised EPR signal of the radical pair state [P + Q A − ] in Zn-substituted Rhodobacter sphaeroides R26 reaction centers demonstrates a strong dependence on the wavelength and polarisation of the excitation light. This dependence is attributed to photoselection by the plane-polarised laser light utilised in the experiments. The model of spin-correlated radical pairs describes the experimental results well if the effect of photoselection is taken into account.
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