Figure 4
From: A colorimetric chemosensor for Cu2+ ion detection based on an iridium(III) complex

UV-Vis spectra of 5 μM of complexes 1 (a), 2 (c) and 3 (e) in the presence of 10 μM of Cu2+ or 25 μM of various metal ions (1:1 ACN-Tris, pH 7.0). Absorbance of 5 μM of complexes 1 (b), 2 (d) and 3 (f) at 555 nm in the presence of 10 μM of Cu2+ and 25 μM of various metal ions.