Supramolecular Encapsulation of Vitamin B₆ by Macrocyclic Nanocontainer Cucurbit[7]uril

Figure 3

The UV spectrum of PH (0.1 mM) at different concentrations of CB[] (0, 0.2, and 0.5 mM, following the direction as indicated by arrows). Inset image: a binding curve obtained based on the UV absorbance measurement of PH (0.1 mM) titrated with various amounts of CB[]. This plot is based on the absorbance at 290 nm versus the concentration of CB[] (M) and indicated a binding constant of  M⁻¹ for PH@CB[] complex at pH = 5 [31].