| Abstract: | Two series of conjugates of dextran and antioxidants from the class of sterically hindered phenols were prepared. The conjugates were characterized by the substitution degree of glycoside units, solubility in different solvents, intrinsic viscosity. The investigation of radical scavenging activity (RSA) of conjugates was carried out in their reactions with two free radicals — 2,2-diphenyl-1-picrylhydrazyl (DPPH) and sodium salt of 2,2-diphenyl-1-picrylhydrazyl sulfonic acid (DPPH-salt). The usage of water soluble DPPH-salt enabled to estimate the RSA of the conjugates in water. It was shown that the rate constants of interaction of the DPPH-salt and the conjugates were 10–30 times higher than this value for low-molecular analogue of phenoxan. High RSA of the conjugates in water can be explained by large solvation shell formed due to high content of hydroxy groups in dextran. |
