KOPS - The Institutional Repository of the University of Konstanz

Linear free-enthalpy relation for radical yield in fluorescence quenching by electron transfer

Aufgrund von Vorbereitungen auf eine neue Version von KOPS, können am Montag, 6.2. und Dienstag, 7.2. keine Publikationen eingereicht werden. (Due to preparations for a new version of KOPS, no publications can be submitted on Monday, Feb. 6 and Tuesday, Feb. 7.)

Linear free-enthalpy relation for radical yield in fluorescence quenching by electron transfer

Cite This

Files in this item

Checksum: MD5:b9c22f10acc95c947614c8fe6ba2afdb

IWA, Peter, Ulrich STEINER, Ekehardt VOGELMANN, Horst E. A. KRAMER, 1982. Linear free-enthalpy relation for radical yield in fluorescence quenching by electron transfer. In: Journal of Physical Chemistry. 86(8), pp. 1277-1285. ISSN 0022-3654. eISSN 1943-3018

@article{Iwa1982Linea-9748, title={Linear free-enthalpy relation for radical yield in fluorescence quenching by electron transfer}, year={1982}, number={8}, volume={86}, issn={0022-3654}, journal={Journal of Physical Chemistry}, pages={1277--1285}, author={Iwa, Peter and Steiner, Ulrich and Vogelmann, Ekehardt and Kramer, Horst E. A.} }

<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/123456789/9748"> <dc:contributor>Vogelmann, Ekehardt</dc:contributor> <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/29"/> <dc:contributor>Kramer, Horst E. A.</dc:contributor> <dc:contributor>Steiner, Ulrich</dc:contributor> <dc:contributor>Iwa, Peter</dc:contributor> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T18:14:08Z</dcterms:available> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T18:14:08Z</dc:date> <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/29"/> <dcterms:issued>1982</dcterms:issued> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/9748"/> <dcterms:abstract xml:lang="eng">The rate constant (kq) and net electron-transfer yield (Φr) in the quenching of an excited oxonine singlet by 24 aromatic amines and methoxy compounds were determined in methanol from stationary fluorescence measurements and flash spectroscopy. The systems investigated correspond to a variation of ΔGet°, the standard free reaction enthalpy of the electron transfer from the quencher to excited singlet oxonine, between -0.12 and -1.56 eV. Whereas the kq values observed are all close to the diffusion controlled limit, Φr, increases when ΔGet° becomes more negative, whereby the following linear correlation is observed: In Φr = -5.7 - (3.2 eV-1)ΔGet°. The implications of this relationship on the mechanism of free-radical formation and electronic deactivation are discussed. Mechanisms where either a solvent-shared radical pair or a relaxed exciplex are assumed as exclusive intermediates of the quenching reaction are shown to be incompatible with the experimental result. It is suggested that in the quenching reaction radical pairs and exciplexes are formed via a nonrelaxed charge-transfer state, the branching ratio between radical pair and exciplex formation depending on ΔGet°.</dcterms:abstract> <dc:creator>Iwa, Peter</dc:creator> <dc:language>eng</dc:language> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dcterms:title>Linear free-enthalpy relation for radical yield in fluorescence quenching by electron transfer</dcterms:title> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dc:rights>Attribution-NonCommercial-NoDerivs 2.0 Generic</dc:rights> <dc:creator>Kramer, Horst E. A.</dc:creator> <dc:format>application/pdf</dc:format> <dcterms:bibliographicCitation>First publ. in: Journal of Physical Chemistry 86 (1982), 8, pp. 1277-1285</dcterms:bibliographicCitation> <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/9748/1/Linear_free_enthalpy_relation_for_radical_yield_in_fluorescence_quenching_by_electron_transfer.pdf"/> <dcterms:rights rdf:resource="http://creativecommons.org/licenses/by-nc-nd/2.0/"/> <dc:creator>Steiner, Ulrich</dc:creator> <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/9748/1/Linear_free_enthalpy_relation_for_radical_yield_in_fluorescence_quenching_by_electron_transfer.pdf"/> <dc:creator>Vogelmann, Ekehardt</dc:creator> </rdf:Description> </rdf:RDF>

Downloads since Oct 1, 2014 (Information about access statistics)

Linear_free_enthalpy_relation_for_radical_yield_in_fluorescence_quenching_by_electron_transfer.pdf 466

This item appears in the following Collection(s)

Attribution-NonCommercial-NoDerivs 2.0 Generic Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 2.0 Generic

Search KOPS


Browse

My Account