The effect of ionic strength and surfactant on the dynamic quenching of 6-methoxyquinoline by halides
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Title |
The effect of ionic strength and surfactant on the dynamic quenching of 6-methoxyquinoline by halides
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Creator |
KONER, APURBA L
MISHRA, PADMAJA P JHA, SMITA DATTA, ANINDYA |
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Subject |
fluorescence
organized assemblies chloride sensor |
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Description |
Steady state and time resolved fluorescence measurements have been performed to assess the role of ionic strength and presence of surfactants in the dynamic quenching of 6-methoxyquinoline by halides. The results of quenching by potassium chloride are mainly presented in this paper. The pH dependence of the Stern–Volmer constant has been rationalized in the light of the difference in ionic strengths. The concentration dependent quenching/enhancement of fluorescence by the surfactant, sodium dodecyl sulphate has been observed and explained by considering an equilibrium between free and bound fluorophores and modification of critical micellar concentration of SDS by salts. The concentration of the surfactant has been found to affect the quenching/enhancement of fluorescence by chlorides. Thus, ionic strength and the presence of surfactants are found to be two factors which can affect the sensitivity of the fluorescent probe towards chlorides.
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Publisher |
Elsevier
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Date |
2009-02-25T11:58:45Z
2011-11-25T17:51:03Z 2011-12-26T13:06:19Z 2011-12-27T05:54:08Z 2009-02-25T11:58:45Z 2011-11-25T17:51:03Z 2011-12-26T13:06:19Z 2011-12-27T05:54:08Z 2005 |
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Type |
Article
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Identifier |
Journal of Photochemistry and Photobiology A: Chemistry 170(1), 21-26
1010-6030 http://dx.doi.org/10.1016/j.jphotochem.2004.08.002 http://hdl.handle.net/10054/778 http://dspace.library.iitb.ac.in/xmlui/handle/10054/778 |
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Language |
en
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