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DC Field | Value | Language |
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dc.contributor.author | Evale B.G | |
dc.contributor.author | Hanagodimath S.M. | |
dc.date.accessioned | 2020-06-12T15:04:43Z | - |
dc.date.available | 2020-06-12T15:04:43Z | - |
dc.date.issued | 2009 | |
dc.identifier.citation | Journal of Luminescence , Vol. 129 , 10 , p. 1174 - 1180 | en_US |
dc.identifier.uri | 10.1016/j.jlumin.2009.05.017 | |
dc.identifier.uri | http://gukir.inflibnet.ac.in:8080/jspui/handle/123456789/4738 | - |
dc.description.abstract | The 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.subject | Finite sink approximation model | |
dc.subject | Fluorescence lifetime | |
dc.subject | Fluorescence quenching | |
dc.subject | Ground-state complex model | |
dc.subject | Stern-Volmer plot | |
dc.title | Fluorescence quenching of newly synthesized biologically active coumarin derivative by aniline in binary solvent mixtures | en_US |
dc.type | Article | |
Appears in Collections: | 1. Journal Articles |
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