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Magnetic field dependence of the deactivation rates of triplet azocumene in solution

Magnetic field dependence of the deactivation rates of triplet azocumene in solution

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MILIKISYANTS, Sergej, Akio KATSUKI, Ulrich STEINER, Henning PAUL, 2002. Magnetic field dependence of the deactivation rates of triplet azocumene in solution. In: Molecular physics. 100(8), pp. 1215-1224. ISSN 0026-8976. eISSN 1362-3028. Available under: doi: 10.1080/00268970110112408

@article{Milikisyants2002Magne-9886, title={Magnetic field dependence of the deactivation rates of triplet azocumene in solution}, year={2002}, doi={10.1080/00268970110112408}, number={8}, volume={100}, issn={0026-8976}, journal={Molecular physics}, pages={1215--1224}, author={Milikisyants, Sergej and Katsuki, Akio and Steiner, Ulrich and Paul, Henning} }

<rdf:RDF xmlns:dcterms="http://purl.org/dc/terms/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:void="http://rdfs.org/ns/void#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/9886"> <dc:contributor>Milikisyants, Sergej</dc:contributor> <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/29"/> <dc:contributor>Steiner, Ulrich</dc:contributor> <dc:language>eng</dc:language> <dc:format>application/pdf</dc:format> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dc:contributor>Katsuki, Akio</dc:contributor> <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/29"/> <dcterms:title>Magnetic field dependence of the deactivation rates of triplet azocumene in solution</dcterms:title> <dc:creator>Paul, Henning</dc:creator> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dcterms:bibliographicCitation>First publ. in: Molecular physics 100 (2002), 8, pp. 1215-1224</dcterms:bibliographicCitation> <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/9886/1/Nr76.pdf"/> <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/9886/1/Nr76.pdf"/> <dc:creator>Milikisyants, Sergej</dc:creator> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T18:15:05Z</dcterms:available> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/9886"/> <dc:creator>Katsuki, Akio</dc:creator> <dc:creator>Steiner, Ulrich</dc:creator> <dcterms:abstract xml:lang="eng">The triplet sensitized photo-decomposition of azocumene into nitrogen and cumyl radicals is investigated by time resolved EPR and optical absorption spectroscopy. It is found that the cumyl radicals carry an initial spin polarization and are formed with a yield that depends on both the solution viscosity and the strength of an external magnetic field. The phenomenon is interpreted in terms of a depopulation-type triplet mechanism, i.e. a competition between decay into radicals and fast, triplet sublevel selective intersystem crossing (ISC) back to the azocumene ground state. Analysis of the data yields relative rate constants for the ISC processes and the cleavage reaction of triplet azocumene. The energetically lower zero field triplet substate is depopulated by ISC about seven times faster than the upper one and about two orders of magnitude faster than depopulation by cleavage occurs. Cleavage probably takes place on the nanosecond time scale, while the ISC must proceed on the picosecond scale, as at elevated viscosity it becomes faster than the rotational Brownian motion of the molecule.</dcterms:abstract> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T18:15:05Z</dc:date> <dc:rights>terms-of-use</dc:rights> <dc:contributor>Paul, Henning</dc:contributor> <dcterms:rights rdf:resource="https://creativecommons.org/licenses/by-nc-nd/2.0/legalcode"/> <dcterms:issued>2002</dcterms:issued> </rdf:Description> </rdf:RDF>

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