Fig. 1. Changes in UV-vis absorption (a) and fluorescence spectrum (λex = 450 nm, (b) of probe 1 (10 μM)) with various amounts of ClO− in potassium phosphate buffer (pH 7.4, containing 40% CH3OH as co-solvent). The insets show ratios of absorbance at 455 nm and 373 nm (a) or fluorescence at 518 nm and 495 nm (b) as a function of ClO− concentration, and color changes before and after the addition of ClO− under natural light (a) and UV lamp (b).
