The molecular aggregation of pyronin Y in natural bentonite clay suspension

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dc.authoridKAYA, Mehmet -- 0000-0001-9680-3622
dc.contributor.authorMeral, Kadem
dc.contributor.authorYılmaz, Nuray
dc.contributor.authorKaya, Mehmet
dc.contributor.authorTabak, Ahmet
dc.contributor.authorOnganer, Yavuz
dc.date.accessioned13.07.201910:50:10
dc.date.accessioned2019-07-29T19:26:31Z
dc.date.available13.07.201910:50:10
dc.date.available2019-07-29T19:26:31Z
dc.date.issued2011
dc.departmentTeknik Bilimler Meslek Yüksekokulu
dc.description.abstractThe molecular aggregation and spectroscopic properties of Pyronin Y (PyY) in the suspension containing natural bentonite clay were studied using molecular absorption, steady-state and time-resolved fluorescence spectroscopy techniques. Interaction between the clay particles and the cationic dye compounds in aqueous solution resulted in significant changes in spectral properties of PyY compared to its molecular behavior in deionized water at the same concentration. These changes were due to the formation of dimer and aggregate of PyY in the clay suspension as well as the presence of the dye monomer. The H-type aggregates of PyY in the clay suspension were identified by the observation of a blue-shifted absorption band of the dye compared to that of its monomer. In spite of diluted dye concentrations, the H-aggregate of PyY in the clay suspension was formed. The intensive aggregation in the clay suspension attributed to the localized high dye concentration on the negatively charged clay surfaces. Adsorption sites of PyY on the clay particles were discussed by deconvulated absorption and excitation spectra. Fluorescence spectroscopy studies revealed that the fluorescence intensity of PyY in the clay suspension is decreased by H-aggregates drastically. Moreover, the presence of H-aggregates in the clay suspension resulted in the decrease of fluorescence lifetime and quantum yield of PyY compared to those in deionized water.
dc.description.sponsorshipAtaturk University; Rize University
dc.description.sponsorshipThe authors thank the Research Fund of Ataturk University and Rize University for the financial support of this work.
dc.identifier.doi10.1016/j.jlumin.2011.05.023
dc.identifier.endpage2127en_US
dc.identifier.issn0022-2313
dc.identifier.issue10en_US
dc.identifier.scopusqualityQ1
dc.identifier.startpage2121en_US
dc.identifier.urihttps://doi.org/10.1016/j.jlumin.2011.05.023
dc.identifier.urihttps://hdl.handle.net/20.500.12451/5626
dc.identifier.volume131en_US
dc.identifier.wosWOS:000293118100017
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherELSEVIER SCIENCE BV
dc.relation.ispartofJOURNAL OF LUMINESCENCE
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectUV-Vis Absorption Spectroscopy
dc.subjectFluorescence Spectroscopy
dc.subjectFluorescence Lifetime
dc.subjectXanthene Dyes
dc.subjectClay Minerals
dc.subjectBentonite
dc.titleThe molecular aggregation of pyronin Y in natural bentonite clay suspension
dc.typeArticle

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