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Mimicking electron ...
Mimicking electron transfer reactions in photosystem II : synthesis and photochemical characterization of a ruthenium(II) tris(bipyridyl) complex with a covalently linked tyrosine.
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- Magnuson, Ann (author)
- Lund University,Lunds universitet,Biokemi och Strukturbiologi,Centrum för Molekylär Proteinvetenskap,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Biochemistry and Structural Biology,Center for Molecular Protein Science,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
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- Berglund, Helena (author)
- Uppsala universitet,Fysikalisk-kemiska institutionen,Fysikalisk kemi I
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Korall, Peter (author)
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- Hammarström, Leif (author)
- Uppsala universitet,Fysikalisk-kemiska institutionen,Fysikalisk kemi I
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Akermark, Björn (author)
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- Styring, Stenbjörn (author)
- Lund University,Lunds universitet,Biokemi och Strukturbiologi,Centrum för Molekylär Proteinvetenskap,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Biochemistry and Structural Biology,Center for Molecular Protein Science,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
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Sun, Licheng (author)
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(creator_code:org_t)
- 1997-11-05
- 1997
- English.
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In: Journal of the American Chemical Society. - : American Chemical Society (ACS). - 0002-7863 .- 1520-5126. ; 119:44, s. 10720-10725
- Related links:
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://lup.lub.lu.s...
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https://urn.kb.se/re...
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Abstract
Subject headings
Close
- In the natural photosynthetic reaction center photosystem II, absorption of a photon leads to photooxidationof the primary electron donor P680, which subsequently retrieves electrons from a tyrosyl residue, functioning as aninterface to the oxygen-evolving manganese complex. In a first step toward mimicking these reactions, we havemade a Ru(II)-polypyridine complex with an attached tyrosyl moiety. The photoexcited ruthenium complex playedthe role of P680and was first oxidized by external acceptors. Combined transient absorbance and EPR studies provided evidence that the Ru(III) formed was reduced by intramolecular electron transfer from the attached tyrosine, with a rate constant of 5104s-1. Thus we show that a tyrosine radical could be formed by light-induced electrontransfer reactions, and we indicate future directions for developing a closer analogy with the photosystem II reactions.
Subject headings
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
Keyword
- Photosynthetic oxygen evolution
- Y-Z
- manganese cluster
- excited-states
- model
- metal
- PHOTOSYNTHETIC OXYGEN EVOLUTION
- Y-Z
- MANGANESE CLUSTER
- EXCITED-STATES
- MODEL
- METAL
Publication and Content Type
- ref (subject category)
- art (subject category)
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