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Effective quenching and excited-state relaxation of a Cu(I) photosensitizer addressed by time-resolved spectroscopy and TDDFT calculations

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dc.contributor.author Friedrich A.
dc.contributor.author Bokareva O.
dc.contributor.author Luo S.
dc.contributor.author Junge H.
dc.contributor.author Beller M.
dc.contributor.author Kühn O.
dc.contributor.author Lochbrunner S.
dc.date.accessioned 2019-01-22T20:36:44Z
dc.date.available 2019-01-22T20:36:44Z
dc.date.issued 2018
dc.identifier.issn 0301-0104
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/147958
dc.description.abstract © 2018 Elsevier B.V. Homogenous photocatalytic systems based on copper photosensitizers are promising candidates for noble metal free approaches in solar hydrogen generation. To improve their performance, a detailed understanding of the individual steps is needed. Here, we study the interaction of a heteroleptic copper (I) photosensitizer with an iron catalyst by time-resolved spectroscopy and ab initio calculations. The catalyst leads to rather efficient quenching of the 3MLCT state of the copper complex, with a bimolecular rate being about three times smaller than the collision rate. Using control experiments with methyl viologen, an appearing absorption band is assigned to the oxidized copper complex demonstrating that an electron transfer from the sensitizer to the iron catalyst occurs and the system reacts along an oxidative pathway. However, only about 30% of the quenching events result in an electron transfer while the other 70% experience deactivation indicating that the photocatalytic performance might suffer from geminate recombination.
dc.relation.ispartofseries Chemical Physics
dc.title Effective quenching and excited-state relaxation of a Cu(I) photosensitizer addressed by time-resolved spectroscopy and TDDFT calculations
dc.type Article
dc.relation.ispartofseries-volume 515
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 557
dc.source.id SCOPUS03010104-2018-515-SID85053138863


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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