Selective and Sensitive Detection of Cyanide Based on the Displacement Strategy Using a Water-Soluble Fluorescent Probe

Figure 1

UV-Vis absorption responses of C-GGH (10 μmol/L) upon the addition of different concentrations of Cu²⁺ (0–2 equiv.) in HEPES buffer aqueous solution (10 mmol/L, pH 10.0). Inset: the corresponding changes of absorption intensity of C-GGH at 430 nm in the presence of different concentrations of Cu²⁺.