Fluorescence quenching of 8-methyl quinolinium: An efficient halide indicator mechanism

Fluorescence quenching of 8 methyl quinoline in acidified aqueous solution by various halides (Cl −, Br −, I −) is studied using steady state and time resolved fluorescence techniques. Having considerably higher quenching constant, much longer fluorescence lifetime (~ 42 ns), mono-exponential fluorescence decay and commercial availability of 8-methyl quinoline project this molecule as a potential candidate in practical applications.