Temperature-dependent electron spin polarization of the triplet state of the primary donor in photosynthetic reaction centers of Rhodopseudomonas viridis: a time-resolved EPR study of single crystals and solid solution

Author(s):
Brink, J.S. van den; Gast, P.; Hoff, A.J.; Manikowski, H.
Published
1994
Publication type
Article / Letter to editor

Abstract

The electron spin polarization (ESP) of triplet of the primary donor (P-3) of Rhodopseudomonas viridis reaction centers (RCs) is anomalous at temperatures above 25 K, i.e. the steady-state ESP changes from AEEAAE to AEAEAE. Fast, time-resolved EPR measurements in solid solution and single crystals of RCs show that this phenomenon results most probably from fast anisotropic spin-lattice relaxation in the radical pair triplet state (k(r) almost-equal-to 5 . 10(9) s-1 at 25 K).

Date issued
1994-01-01
Language
English
Publisher
SPRINGER WIEN
Is part of
Applied Magnetic Resonance (1994), Vol. 6, no. 1-2, p. 67-81
hdl
1887/3590260
doi
10.1007/BF03162482
URL
https://link.springer.com/article/10.1007/BF03162482