dc.contributor.advisor | Wenger, Oliver Prof. Dr. | de |
dc.contributor.author | Hankache, Jihane | de |
dc.date.accessioned | 2012-07-11T15:43:25Z | de |
dc.date.accessioned | 2013-01-18T10:38:47Z | de |
dc.date.available | 2013-01-30T23:51:24Z | de |
dc.date.issued | 2012-07-11 | de |
dc.identifier.uri | http://hdl.handle.net/11858/00-1735-0000-000D-F04C-1 | de |
dc.identifier.uri | http://dx.doi.org/10.53846/goediss-2181 | |
dc.description.abstract | In den letzten Jahren hat man der
künstlichen Photosynthese insbesondere im Bereich der Chemie viel
Aufmerksamkeit geschenkt. Vor allem auf der Synthese molekularer
Strukturen, welche die natürlichen Prozesse nachempfinden, lag ein
wichtiger Fokus. Viele dieser künstlichen Systeme wurden zum
Studium des lichtinduzierten intramolekularen Elektronentransfers
herangezogen. Geignete Moleküle bestehen normalerweise aus einem
Photosensibilisator, einem Elektronen | de |
dc.format.mimetype | application/pdf | de |
dc.language.iso | ger | de |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/ | de |
dc.title | Photoinduced electron transfer in dyads and triads with d6 metal complexes and anthraquinone | de |
dc.type | doctoralThesis | de |
dc.title.translated | Photoinduzierter Elektronentransfer in Dyaden und Triaden mit d6 Metallkomplexen und Antrachinon | de |
dc.contributor.referee | Meyer, Franc Prof. Dr. | de |
dc.date.examination | 2012-06-21 | de |
dc.subject.dnb | 540 Chemie | de |
dc.subject.gok | SI 000 | de |
dc.subject.gok | ST 000 | de |
dc.description.abstracteng | Over the past years, designing molecular
systems that mimic natural processes has become the center of much
research in the field of chemistry. Many of these artificial
systems are synthesized in order to study photoinduced
intramolecular electron transfer. These models are usually
consisting of a photosensitizer, an electron acceptor, and/or an
electron donor, and are considered attractive candidates for the
conversion and storage of solar energy. The molecular dyads
investigated in this thesis are comprised of a d6 metal diimine
complex acting as photosensitizer and an anthraquinone as electron
acceptor. In addition to the d6 metal photosensitizer and the
anthraquinone acceptor, a tertiary amine has been used as an
electron donor in the triads. Photoexcitation of these systems in
presence of a strong hydrogen-bond donor strongly influences the
thermodynamics and kinetics of the photoinduced electron transfer
reaction. In fact, hydrogen-bonding between protic solvent and
reduced anthraquinone has a great impact on the excited state
deactivation of the dyads by electron transfer from ruthenium to
anthraquinone. In the triads, this hydrogen-bonding leads to a
significant increase of the lifetime of the charge-separated state
containing an oxidized tertiary amine and reduced anthraquinone.
This long-lived charge-separated state is interesting in terms of
storing light energy in chemical bonds. In both the dyads and
triads, the overall photoinduced reaction in presence of protic
solvent may be regarded as a variant of stepwise proton-coupled
electron transfer (PCET) in which proton density is transferred
from the hydrogen-bond donor solvent to photoreduced
anthraquinone. | de |
dc.contributor.coReferee | Stalke, Dietmar Prof. Dr. | de |
dc.contributor.thirdReferee | Schroeder, Jörg Prof. Dr. | de |
dc.subject.topic | Chemistry | de |
dc.subject.ger | Elektronentransfer | de |
dc.subject.ger | Wasserstoffbrückenbindung | de |
dc.subject.ger | transiente Absorption | de |
dc.subject.ger | Ruthenium(II) | de |
dc.subject.ger | Osmium(II) | de |
dc.subject.ger | Iridium(III) | de |
dc.subject.ger | Anthrachinon | de |
dc.subject.eng | Photochemistry | de |
dc.subject.eng | electron transfer | de |
dc.subject.eng | hydrogen bonding | de |
dc.subject.eng | transient absorption | de |
dc.subject.eng | ruthenium(II) | de |
dc.subject.eng | osmium(II) | de |
dc.subject.eng | iridium(III) | de |
dc.subject.eng | anthraquinone | de |
dc.subject.bk | 35.14 | de |
dc.subject.bk | 35.16 | de |
dc.subject.bk | 35.43 | de |
dc.subject.bk | 35.49 | de |
dc.identifier.urn | urn:nbn:de:gbv:7-webdoc-3609-6 | de |
dc.identifier.purl | webdoc-3609 | de |
dc.affiliation.institute | Fakultät für Chemie | de |
dc.identifier.ppn | 773523243 | |