Enzymatic Polymerization of Dihydroquercetin Using Bilirubin Oxidaseстатья

Информация о цитировании статьи получена из Scopus, Web of Science
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Дата последнего поиска статьи во внешних источниках: 8 декабря 2015 г.

Работа с статьей


[1] Enzymatic polymerization of dihydroquercetin using bilirubin oxidase / M. E. Khlupova, I. S. Vasil’eva, G. P. Shumakovich et al. // Biochemistry (Moscow). — 2015. — Vol. 80, no. 2. — P. 233–241. Dihydroquercetin (or taxifolin) is one of the most famous flavonoids and is abundant in Siberian larch (Larix sibirica). The oxidative polymerization of dihydroquercetin (DHQ) using bilirubin oxidase as a biocatalyst was investigated and some physicochemical properties of the products were studied. DHQ oligomers (oligoDHQ) with molecular mass of 2800 and polydispersity of 8.6 were obtained by enzymatic reaction under optimal conditions. The oligomers appeared to be soluble in dimethylsulfoxide, dimethylformamide, and methanol. UVvisible spectra of oligoDHQ in dimethylsulfoxide indicated the presence of highly conjugated bonds. The synthesized oligoDHQ was also characterized by FTIR and 1H and 13C NMR spectroscopy. Comparison of NMR spectra of oligoDHQ with DHQ monomer and the parent flavonoids revealed irregular structure of a polymer formed via the enzymatic oxidation of DHQ followed by nonselective radical polymeriza tion. As compared with the monomer, oligoDHQ demonstrated higher thermal stability and high antioxidant activity. [ DOI ]

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