✦ LIBER ✦

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

✍ Scribed by Sergei A. Dzuba; Peter Gast; Arnold J. Hoff

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 707 KB
Volume: 236
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(95)00259-7

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✦ Synopsis

Electron spin echo envelope modulation (ESEEM) of the transient spin-polarised PfQA 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, Thumauer and Norris and allow us to obtain readily the values of dipolar and exchange couplings. The results are insensitive to 15N enrichment.

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