Fig. 2. Fluorescence quenching degrees in terms of the IF/I0 ratio of 1 (2 × 10−5 mol L−1 in methanol) in the presence of both Ag+ (5.0 equiv.) and competing metal ions (5.0 equiv.). The black bars represent the addition of 5 equiv. of various metal ions to a solution of 1, and the red bars represent the competing metal ion added in the presence of Ag+.
