ESEEM study of spin-spin interactions in spin-polarised P+QA− pairs in the photosynthetic purple bacterium Rhodobacter sphaeroides R26

Author(s):
Dzuba, S.A.; Gast, P.; Hoff, A.J.
Published
1995
Publication type
Article / Letter to editor

Abstract

Electron spin echo envelope modulation (ESEEM) of the transient spin-polarised P(+)Q(A)(-) pairs has been studied at 20 and 220 K. The observed strong out-of-phase modulation is interpreted as resulting from electron-electron dipolar and exchange interactions. Fourier-transformed echo envelopes are consistent with the theory developed recently by Tang, Thurnauer and Norris and allow us to obtain readily the values of dipolar and exchange couplings. The results are insensitive to N-15 enrichment.

Date issued
1995-04-28
Language
English
Publisher
ELSEVIER SCIENCE BV
Is part of
Chemical Physics Letters (1995), Vol. 236, no. 6, p. 595-602
hdl
1887/3590400
doi
10.1016/0009-2614(95)00259-7