Complexation of baicalin with ferrous (II) and its characterization

The complexation of baicalin with ferrous (II) and its characterization are reported. A orthogonal test was used to optimize the conditions of the complexation of baicalin and ferrous (II). The composition and structure of baicalin-ferrous (II) complex were characterized by elementary analysis, TG-DTA methods, and IR- and UV-spectral analysis. Coordination bonding is dependent on the nature of the baicalin and ferrous (II) ion, their ratio, the pH of the solution, etc. The strongest complex forms between baicalin and ferrous (II) (2:1 ratio).