بررسي اسپكتروسكوپي ساختار و فعاليت بيولوژيكي كرستين در حضور كاتيون بيسموت

New complex between quercetin and Bi (III) was synthesized in methanol and structural feature of the complex was investigated using ultraviolet-visible spectroscopic method. Changes in antioxidant activity of quercetin, after binding with bismuth, was evaluated by DPPH (1, 1-diphenyl-2-picrylhydrazyl) free radical scavenging method. The finding of this study demonstrated that Bi(III) cation bins to quercetin from 3-hydroxyl-4-carbonyl positions. Stoichiometry between the metal-ligand was estimated ratio of 1:1. Radical scavenging activity free quercetin was decreased after chelation of Bi(III) cation