Photoinduced electron transfer in dyads and triads with d6 metal complexes and anthraquinone

Hankache, Jihane

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

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