Photoinduced Charge Transfer in Porphyrin-Cobaloxime and Corrole-Cobaloxime Hybrids

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dc.contributor.authorPeuntinger, K.en
dc.contributor.authorLazarides, T.en
dc.contributor.authorDafnomili, D.en
dc.contributor.authorCharalambidis, G.en
dc.contributor.authorLandrou, G.en
dc.contributor.authorKahnt, A.en
dc.contributor.authorSabatini, R. P.en
dc.contributor.authorMcCamant, D. W.en
dc.contributor.authorGryko, D. T.en
dc.contributor.authorCoutsolelos, A. G.en
dc.contributor.authorGuldi, D. M.en
dc.date.accessioned2015-11-24T16:44:48Z
dc.date.available2015-11-24T16:44:48Z
dc.identifier.issn1932-7447-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/8836
dc.rightsDefault Licence-
dc.subjectdriven hydrogen-productionen
dc.subjectfree-base corrolesen
dc.subjectelectron-transferen
dc.subjectvisible-lighten
dc.subjecttrans-a(2)b-corroles bearingen
dc.subjectphotocatalytic systemen
dc.subjecthomogeneous systemen
dc.subjectaqueous protonsen
dc.subjectquantum yieldsen
dc.subjectwateren
dc.titlePhotoinduced Charge Transfer in Porphyrin-Cobaloxime and Corrole-Cobaloxime Hybridsen
heal.abstractWe report on the synthesis of hybrid molecules consisting of a porphyrin or corrole chromophore axially coordinated to a [Co-III(dmgH)(2)(Cl)](+/- 0) (dmg = dimethylglyoxime) unit via a pyridine group as potential hydrogen forming entities in H2O/THF medium. Photophysical, electrochemical, and pulse radiolysis studies on the hybrids and/or their separate components show that selective excitation of the porphyrin or corrole chromophore in its first singlet excited state leads to fast charge separation due to chromophore to cobalt electron transfer. However, this charge separation is followed by even faster charge recombination thereby preventing the accumulation of a reduced cobalt species which would lead to hydrogen production. It is important, nevertheless, that addition of a sacrificial electron donor slows the charge recombination down. In light of the latter it comes as hardly surprising that the photocatalysis experiments in the presence of a sacrificial electron donor (i.e., triethylamine) show modest rates of hydrogen production.en
heal.accesscampus-
heal.fullTextAvailabilityTRUE-
heal.identifier.primaryDoi 10.1021/Jp311766s-
heal.identifier.secondary<Go to ISI>://000314492400014-
heal.identifier.secondaryhttp://pubs.acs.org/doi/pdfplus/10.1021/jp311766s-
heal.journalNameJournal of Physical Chemistry Cen
heal.journalTypepeer reviewed-
heal.languageen-
heal.publicationDate2013-
heal.publisherAmerican Chemical Societyen
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείαςel
heal.typejournalArticle-
heal.type.elΆρθρο Περιοδικούel
heal.type.enJournal articleen

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