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High-valent Ruthenium-Manganese Complexes for Solar Energy Production.

Magnuson, Ann LU ; Huang, Ping LU ; Lomoth, Reiner; Tran, Anh; Fryxelius, Jacob; Abrahamsson, Maria; Schimdt, H.; Tamm, Markus; Zheng, J. and Högblom, Joakim LU , et al. (2001) In PS2001 Proceedings
Abstract
We present progress in the development of artificial photosynthesis, as a means to harvesting and storage of solar energy. The plan is to compose molecular systems that combine known photochemistry with emerging functional model compounds. A photochemical device for solar energy conversion contains a photosensitizer, an electron acceptor system and a donor system that prevents charge recombination. Our goal is to utilize water as sacrificial electron donor, which will allow a net production of reducing equivalents, and the ultimate production of fuel. The only light-driven molecular catalyst for water oxidation exists in Photosystem II (PSII), which has a tetranuclear Mn-cluster in the active site. Here we present several Mn-compounds,... (More)
We present progress in the development of artificial photosynthesis, as a means to harvesting and storage of solar energy. The plan is to compose molecular systems that combine known photochemistry with emerging functional model compounds. A photochemical device for solar energy conversion contains a photosensitizer, an electron acceptor system and a donor system that prevents charge recombination. Our goal is to utilize water as sacrificial electron donor, which will allow a net production of reducing equivalents, and the ultimate production of fuel. The only light-driven molecular catalyst for water oxidation exists in Photosystem II (PSII), which has a tetranuclear Mn-cluster in the active site. Here we present several Mn-compounds, that we have developed for the purpose of creating water-oxidizing catalysts.

Our idea is to link Ru-tris(bipyridine) derivatives, which mimicks the function of the primary donor in PS II, with manganese complexes, mimicking the tetra-Mn cluster on the PSII donor side. We have constructed a number of heteronuclear complexes, containing a Ru-photosensitizer and various Mn-complexes. The compounds have been characterized with regards to their photophysical and photochemical properties, redox potentials and structure. The most promising compounds are capable of undergoing several electron transfers from the Mn-complex to the photosensitizer, leaving 3 to 4 oxidizing equivalents on the Mn. In the latest development, we have constructed ligands that stabilize higher oxidation states in Mn, in order to promote formation of Mn(V) which many believes is an intermediate in the water oxidation mechanism. (Less)
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keywords
photosystem II, hydrogen, ruthenium, biomimetics, manganese
in
PS2001 Proceedings
publisher
CSIRO Publishing
external identifiers
  • other:CD-ROM - 0643067116
DOI
10.1071/SA0403703
language
English
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yes
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1cf2c474-d100-4c13-bad6-c0a0212755e2 (old id 527288)
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2007-09-21 13:54:53
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2016-04-16 09:51:00
@inproceedings{1cf2c474-d100-4c13-bad6-c0a0212755e2,
  abstract     = {We present progress in the development of artificial photosynthesis, as a means to harvesting and storage of solar energy. The plan is to compose molecular systems that combine known photochemistry with emerging functional model compounds. A photochemical device for solar energy conversion contains a photosensitizer, an electron acceptor system and a donor system that prevents charge recombination. Our goal is to utilize water as sacrificial electron donor, which will allow a net production of reducing equivalents, and the ultimate production of fuel. The only light-driven molecular catalyst for water oxidation exists in Photosystem II (PSII), which has a tetranuclear Mn-cluster in the active site. Here we present several Mn-compounds, that we have developed for the purpose of creating water-oxidizing catalysts. <br/><br>
Our idea is to link Ru-tris(bipyridine) derivatives, which mimicks the function of the primary donor in PS II, with manganese complexes, mimicking the tetra-Mn cluster on the PSII donor side. We have constructed a number of heteronuclear complexes, containing a Ru-photosensitizer and various Mn-complexes. The compounds have been characterized with regards to their photophysical and photochemical properties, redox potentials and structure. The most promising compounds are capable of undergoing several electron transfers from the Mn-complex to the photosensitizer, leaving 3 to 4 oxidizing equivalents on the Mn. In the latest development, we have constructed ligands that stabilize higher oxidation states in Mn, in order to promote formation of Mn(V) which many believes is an intermediate in the water oxidation mechanism.},
  author       = {Magnuson, Ann and Huang, Ping and Lomoth, Reiner and Tran, Anh and Fryxelius, Jacob and Abrahamsson, Maria and Schimdt, H. and Tamm, Markus and Zheng, J. and Högblom, Joakim and van Rotterdam, B. and Park, Jonathan and Berglund, Helena and Åkermark, Björn and Styring, Stenbjörn and Hammarström, Leif and Sun, Licheng},
  booktitle    = {PS2001 Proceedings},
  keyword      = {photosystem II,hydrogen,ruthenium,biomimetics,manganese},
  language     = {eng},
  publisher    = {CSIRO Publishing},
  title        = {High-valent Ruthenium-Manganese Complexes for Solar Energy Production.},
  url          = {http://dx.doi.org/10.1071/SA0403703},
  year         = {2001},
}