Synthesis and Study in Solution of a New Dansyl-Modified Azacryptand

Figure 3

Distribution diagram of the species (% abundance versus pH) obtained upon potentiometric titration of L1 (0.5 mM), in the presence of 2 equiv. Cu(CF₃SO₃)₂ (0.07 M NaNO₃, H₂O : MeOH 3 : 2 at 25°C). The corresponding constants are shown in Table 1. Black triangles: profile of Mol Abs (, M⁻¹ cm⁻¹) at 300 nm versus pH, obtained upon pH-spectrophotometric titration of L1 (0.5 mM), in the presence of 2 equiv. Cu(CF₃SO₃)₂ (right vertical axis, see Figure 4).