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dc.contributor.authorEvale B.G
dc.contributor.authorHanagodimath S.M.
dc.date.accessioned2020-06-12T15:04:43Z-
dc.date.available2020-06-12T15:04:43Z-
dc.date.issued2009
dc.identifier.citationJournal of Luminescence , Vol. 129 , 10 , p. 1174 - 1180en_US
dc.identifier.uri10.1016/j.jlumin.2009.05.017
dc.identifier.urihttp://gukir.inflibnet.ac.in:8080/jspui/handle/123456789/4738-
dc.description.abstractThe fluorescence quenching of newly synthesized coumarin (chromen-2-one) derivative, 4-(5-methyl-3-furan-2-yl-benzofuran-2-yl)-7-methyl-chromen-2-one (MFBMC) by aniline in different solvent mixtures of benzene and acetonitrile was determined at room temperature (296 K) by steady-state fluorescence measurements. The quenching is found to be appreciable and positive deviation from linearity was observed in the Stern-Volmer (S-V) plots in all the solvent mixtures. This could be explained by static and dynamic quenching models. The positive deviation in the S-V plot is interpreted in terms of ground-state complex formation model and sphere of action static quenching model. Various rate parameters for the fluorescence quenching process have been determined by using the modified Stern-Volmer equation. The sphere of action static quenching model agrees very well with experimental results. The dependence of Stern-Volmer constant KSV, on dielectric constant ? of the solvent mixture suggests that the fluorescence quenching is diffusion-limited. Further with the use of finite sink approximation model, it is concluded that these bimolecular quenching reactions are diffusion-limited. Using lifetime (?o) data, the distance parameter R? and mutual diffusion coefficient D are estimated independently. © 2009 Elsevier B.V. All rights reserved.en_US
dc.subjectFinite sink approximation model
dc.subjectFluorescence lifetime
dc.subjectFluorescence quenching
dc.subjectGround-state complex model
dc.subjectStern-Volmer plot
dc.titleFluorescence quenching of newly synthesized biologically active coumarin derivative by aniline in binary solvent mixturesen_US
dc.typeArticle
Appears in Collections:1. Journal Articles

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