fig3
![Coordination-driven [2+2] metallo-macrocycles isomers: conformational control and photophysical properties](https://image.oaes.cc/cb125064-36d2-409e-a3ce-64c7e564b58e/4997.fig.3.jpg)
Figure 3. Fluorescence emission spectra of metallacycles SA (A) and SB (B) in a DMSO/H2O (1/9) mixture containing different amounts of TNT (λex = 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 (λex = 320 nm, c = 1.00 μM).