Fluorescence quenching of 6-methoxyquinoline: an indicator for sensing chloride ion in aqueous media |
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| Authors: | MS Mehata HB Tripathi |
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| Institution: | Photophysics Laboratory, Department of Physics, DSB Campus, Kumaon University, 263002 Nainital, India |
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| Abstract: | The quenching of fluorescence intensity and decay time of protonated form of 6-methoxyquinoline (6MQ+) with chloride ion (Cl−) in aqueous solution at ambient temperatures have been investigated. The quenching follows linear Stern-Volmer relation. The values of Stern-Volmer quenching constant/quenching efficiency (Ksv) and quenching rate constant (Kq) for the Cl− ion are close to 75 M−1 and 3.21×109 M−1 S−1, respectively. The quenching is found to be collisional or dynamical in nature. The study reveals that the system can be used as a sensor for the detection of chloride ion. |
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| Keywords: | Chloride-ion sensor Fluorescence quenching and lifetime 6MQ+ |
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