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Synthesis and Photoinduced Electron Transfer of Donor-Sensitizer-Acceptor Systems
Stockholm University, Faculty of Science, Department of Organic Chemistry.
2005 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Artificial systems involving water oxidation and solar cells are promising ways for the conversion of solar energy into fuels and electricity. These systems usually consist of a photosensitizer, an electron donor and / or an electron acceptor. This thesis deals with the synthesis and photoinduced electron transfer of several donor-sensitizer-acceptor supramolecular systems.

The first part of this thesis describes the synthesis and properties of two novel dinuclear ruthenium complexes as electron donors to mimic the donor side reaction of Photosystem II. These two Ru2 complexes were then covalently linked to ruthenium trisbipyridine and the properties of the resulting trinuclear complexes were studied by cyclic voltammetry and transient absorption spectroscopy.

The second part presents the synthesis and photoinduced electron transfer of covalently linked donor-sensitizer supramolecular systems in the presence of TiO2 as electron acceptors. Electron donors are tyrosine, phenol and their derivatives, and dinuclear ruthenium complexes. Intramolecular electron transfer from the donor to the oxidized sensitizer was observed by transient absorption spectroscopy after light excitation of the Ru(bpy)32+ moiety. The potential applications of Ru2-based electron donors in artificial systems for water oxidation and solar cells are discussed.

In the final part, the photoinduced interfacial electron transfer in the systems based on carotenoids and TiO2 is studied. Carotenoids are shown to act as both sensitizers and electron donors, which could be used in artificial systems to mimic the electron transfer chain in natural photosynthesis.

Place, publisher, year, edition, pages
Stockholm: Institutionen för organisk kemi , 2005. , 53 p.
Keyword [en]
Artificial photosynthesis, Dye-sensitized solar cells, Electron donors, Dinuclear ruthenium complexes, Electron transfer
National Category
Organic Chemistry
Identifiers
URN: urn:nbn:se:su:diva-411ISBN: 91-7155-034-8 (print)OAI: oai:DiVA.org:su-411DiVA: diva2:193545
Public defence
2005-04-20, Magnélisalen, Kemiska övningslaboratoriet, Svante Arrhenius väg 12 A, Stockholm, 10:00
Opponent
Supervisors
Available from: 2005-03-21 Created: 2005-03-21Bibliographically approved
List of papers
1. Mixed-valence Properties of an Acetate-Bridged Dinuclear Ruthenium(II,III) Complex
Open this publication in new window or tab >>Mixed-valence Properties of an Acetate-Bridged Dinuclear Ruthenium(II,III) Complex
2003 In: The Journal of Physical Chemistry A, ISSN 1089-5639, Vol. 107, no 22, 4373-4380 p.Article in journal (Refereed) Published
Identifiers
urn:nbn:se:su:diva-23620 (URN)
Note
Part of urn:nbn:se:su:diva-411Available from: 2005-03-21 Created: 2005-03-21Bibliographically approved
2. Synthesis and Characterization of Novel Dinuclear Ruthenium Complexes Covalently Linked to Ru(II) Trisbipyridine: an Approach to Mimics of the Donor Side of PS II
Open this publication in new window or tab >>Synthesis and Characterization of Novel Dinuclear Ruthenium Complexes Covalently Linked to Ru(II) Trisbipyridine: an Approach to Mimics of the Donor Side of PS II
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Manuscript (Other academic)
Identifiers
urn:nbn:se:su:diva-23621 (URN)
Note
Part of urn:nbn:se:su:diva-411Available from: 2005-03-21 Created: 2005-03-21 Last updated: 2010-01-13Bibliographically approved
3. Light-driven Tyrosine Radical Formation in a Ruthenium-Tyrosine Complex Attached to Nanoparticle TiO2
Open this publication in new window or tab >>Light-driven Tyrosine Radical Formation in a Ruthenium-Tyrosine Complex Attached to Nanoparticle TiO2
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2002 In: Inorganic Chemistry, ISSN 0020-1669, Vol. 41, no 24, 6258-6266 p.Article in journal (Refereed) Published
Identifiers
urn:nbn:se:su:diva-23622 (URN)
Note
Part of urn:nbn:se:su:diva-411Available from: 2005-03-21 Created: 2005-03-21Bibliographically approved
4. Stepwise Charge Separation from a Ruthenium-Tyrosine Complex to a Nanocrystalline TiO2 Film
Open this publication in new window or tab >>Stepwise Charge Separation from a Ruthenium-Tyrosine Complex to a Nanocrystalline TiO2 Film
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2004 In: The Journal of Physical Chemistry B, ISSN 1089-5647, Vol. 108, no 34, 12904-12910 p.Article in journal (Refereed) Published
Identifiers
urn:nbn:se:su:diva-23623 (URN)
Note
Part of urn:nbn:se:su:diva-411Available from: 2005-03-21 Created: 2005-03-21Bibliographically approved
5. Synthesis and Photoinduced Electron Transfer Study of a Substituted Phenol Covalently Linked to Ruthenium Trisbipyridine with or without Four Ester Groups
Open this publication in new window or tab >>Synthesis and Photoinduced Electron Transfer Study of a Substituted Phenol Covalently Linked to Ruthenium Trisbipyridine with or without Four Ester Groups
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Manuscript (Other academic)
Identifiers
urn:nbn:se:su:diva-23624 (URN)
Note
Part of urn:nbn:se:su:diva-411Available from: 2005-03-21 Created: 2005-03-21 Last updated: 2010-01-13Bibliographically approved
6. Photoinduced Electron Transfer between a Carotenoid and TiO2 Nanoparticle
Open this publication in new window or tab >>Photoinduced Electron Transfer between a Carotenoid and TiO2 Nanoparticle
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2002 In: Journal of the American Chemical Society, ISSN 0002-7863, Vol. 124, no 46, 13949-13957 p.Article in journal (Refereed) Published
Identifiers
urn:nbn:se:su:diva-23625 (URN)
Note
Part of urn:nbn:se:su:diva-411Available from: 2005-03-21 Created: 2005-03-21Bibliographically approved
7. Carotenoid and Pheophytin on Semiconductor Surface: Self-Assembly and Photoinduced Electron Transfer
Open this publication in new window or tab >>Carotenoid and Pheophytin on Semiconductor Surface: Self-Assembly and Photoinduced Electron Transfer
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2004 In: Journal of the American Chemical Society, Vol. 126, no 10, 3066-3067 p.Article in journal (Refereed) Published
Identifiers
urn:nbn:se:su:diva-23626 (URN)
Note
Part of urn:nbn:se:su:diva-411Available from: 2005-03-21 Created: 2005-03-21Bibliographically approved

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