Fig. 4. (a) Emission intensity of 6 (2.5 μM) at 434 nm and (b) emission intensity of 7 (5 μM) at 430 nm 2 minutes after addition of 10 equivalents of the different anions in 10 mM HEPES buffer solution at pH = 7.4. Excitation at 254 nm and 250 nm, respectively. Number of replicates n = 3. Red dashed line: background emission intensity of the sensors.
