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Absorbance-detected electron spin echo spectroscopy of non-radiative triplet states in zero field: An application to the primary donor of the photosynthetic bacterium rhodobacter sphaeroides R-26

✍ Scribed by E.J. Lous; A.J. Hoff

Publisher: Elsevier Science
Year: 1987
Tongue: English
Weight: 631 KB
Volume: 140
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(87)80499-2

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✦ Synopsis

Electron spin echoes of triplet states in zero field were optically detected using the singlet ground-state absorbance. The technique has been applied to reaction centers of the photosynthetic bacterium Rhodobacter sphaeroides R-26. The spin-spin relazation time T, of the triplet state of the primary electron donor P (a bacteriochlorophyll dimer) was 1.16 k 0.05 us, independent of temperature in the range I .2-2.1 K.

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The reaction center triplet state of the photosynthetic bacterium Rhodobacter sphaeroides R26: Electron spin echo spectroscopy of a single crystal

✍ W.J. Buma; R.G. Evelo; E.J.J. Groenen; A.J. Hoff; H.M. Nan; J. Schmidt 📂 Article 📅 1987 🏛 Elsevier Science 🌐 English ⚖ 525 KB

Electron spin echo detected EPR spectra have been obtained of the triplet state of a single crystal of the reaction center of Rhodobacter sphaeroides R26. The crystal is found to be monoclinic and to contain four magnetically inequivalent sites. The magnetic relaxation behaviour of this triplet has