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 ( K sv ) and quenching rate constant ( K q ) for the Cl − ion are close to 75 M −1 and 3.21×10 9 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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