Photophysical and photochemical properties of a water-soluble perylene diimide derivative

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dc.contributor.authorIcli, S
dc.contributor.authorDemic, S
dc.contributor.authorDindar, B
dc.contributor.authorDoroshenko, AO
dc.contributor.authorTimur, C
dc.date.accessioned2019-10-27T18:22:30Z
dc.date.available2019-10-27T18:22:30Z
dc.date.issued2000
dc.departmentEge Üniversitesien_US
dc.description.abstractThe absorbance maximum of synthesized water soluble perylene 4-carboxylphenyl-bis-diimide (PECA) is found to be about 50 nm lower in water, as compared to absorbance in organic solvents, and the singlet energy is 61.4 kcal mol(-1) in aqueous solutions, compared to 54.4 kcal mol(-1) in organic solvents. The fluorescence quantum yields were similar in both media but radiative and fluorescence lifetimes are found to be enhanced about twice (tau(f) from 8 to 15 ns), and the rate of fluorescence is decreased twofold in aqueous solution, as compared to organic solutions. PECA is proven to produce reactive superoxide anion and/or hydroperoxy radical in aqueous solutions, in the pH range of 6-12 (phi(O2 .-)(PECA) = 0.062 at pH=9). The superoxide/hydroperoxy formation is found to be enhanced in the presence of ferric ions (phi(O2 .-)(PECA) = 0.10 at pH=9). The quantum yield of flouresence emmission, Q(f), was measured to be 1.00 at pH 11.85, and 0.87 at pH 6.60. The difference is attributed to an aggregation effect due to low solubility in neutral aqueous solution. Fluorescence quenching by Co+2 ions has yielded a quenching rate of 2.3 x 10(12) M-1 s(-1) for perylene diimide. The degradation of bromacil and 2,4-dichlorophenoxyacetic acid (2,4-D) pesticides in neutral aqueous solutions has proven that PECA/Fe+3 solar photocatalyst is as reactive as singlet oxygen in photo oxidations for organic pollutants. High thermal and photo stabilities and the regain of catalysts on precipitation, are the advantages with respect to classical triplet organic photosensitizers (methylene blue, rose bengal, etc.) employed for singlet oxygen photodegradations. (C) 2000 Elsevier Science S.A. All rights reserved.en_US
dc.identifier.doi10.1016/S1010-6030(00)00311-7
dc.identifier.endpage24en_US
dc.identifier.issn1010-6030
dc.identifier.issn1010-6030en_US
dc.identifier.issue01.Feben_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage15en_US
dc.identifier.urihttps://doi.org/10.1016/S1010-6030(00)00311-7
dc.identifier.urihttps://hdl.handle.net/11454/36013
dc.identifier.volume136en_US
dc.identifier.wosWOS:000089411700003en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Science Saen_US
dc.relation.ispartofJournal of Photochemistry and Photobiology A-Chemistryen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectsolar photocatalysisen_US
dc.subjectperylene diimideen_US
dc.subjectsuperoxideen_US
dc.subjectsinglet oxygenen_US
dc.titlePhotophysical and photochemical properties of a water-soluble perylene diimide derivativeen_US
dc.typeArticleen_US

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