Electron spin polarization in photosynthetic bacteria. Anisotropic chemical reactivity

Autor:	T.J. Schaafsma, Peter Gast, J. J. Semlyen, Arnold J. Hoff, D. J. Riley, P. J. Hore, D.A. Hunter, F.G.H. van Wijk
Jazyk:	angličtina
Rok vydání:	1991
Předmět:	Spin polarization Semiquinone Chemistry Biophysics Primary charge separation General Chemistry Photochemistry Electron transport chain law.invention Biofysica law Chemical physics Life Science Singlet state Photosynthetic bacteria Triplet state Electron paramagnetic resonance
Zdroj:	Research on chemical intermediates, 16, 127-139 Research on chemical intermediates 16 (1991) Research on Chemical Intermediates, 16(2), 127-139. SPRINGER
ISSN:	0922-6168
Popis:	It is shown that electron spin polarization can be used to probe the anisotropy of singlet-triplet interconversion of radical pairs involved in photosynthetic charge separation. Anisotropic polarization may be observed with non-oriented reaction centres, provided an anisotropic interaction (e.g. zero-field splitting or g-tensor anisotropy) produces resolvable structure in the EPR spectrum of the reaction intermediates. Two examples, both for prereduced bacterial reaction centres, are discussed: (i) the triplet state of the primary donor (a bactenochlorophyll dimer) and (ii) the reduced secondary acceptor (a semiquinone). Computer simulations are used to understand the observed behaviour and yield information on the magnetic and electronic interactions involved in electron transport. © 1991 Springer.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9495e9ff911f62043adb63cf603a3324 https://doi.org/10.1163/156856791x00219 Zobrazit plný text záznamu Full text from SpringerLink