fig3

Figure 3. Fluorescence emission spectra of metallacycles SA (A) and SB (B) in a DMSO/H₂O (1/9) mixture containing different amounts of TNT (λ_ex = 320 nm, c = 1.00 μM). (C) The fluorescence quenching efficiencies of metallacycles SA and SB at different TNT concentrations in a DMSO/H₂O (1:9) mixture. (D) Plot of relative fluorescence intensities (I₀/I, I = peak intensity and I₀ = peak intensity at [TNT] = 0 μM) versus TNT concentrations in a DMSO/H₂O (1:9) mixture (λ_ex = 320 nm, c = 1.00 μM).