Figure 7.

(A) Fluorescence spectra of probe 13 treated with Na₂S (0–100 μM); (B) fluorescence intensity of probe 13 in the absence (black) and presence (red) of Na₂S, and at varying pH; (C) time course of fluorescence intensity of probe 13 in the presence of Na₂S; (D) fluorescence intensities of probe 13 treated with various relevant analytes (1) probe only; (2) F⁻; (3) GSH; (4) H₂O₂; (5) Hcy; (6) I⁻; (7) Cys; (8) NO₂⁻; (9) S₂O₃²⁻; (10) SO₃²⁻; (11) HSO₃²⁻; (12) NO₃⁻; (13) Na₂S, in PBS buffer (pH 7.4, containing 50% DMF as a cosolvent). Reprinted with permission from Ref. [64]. Copyright ©2016 Royal Society of Chemistry.