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Inne
α-tocopherol impact on oxy-radical induced free radical decomposition of DMSO : spin trapping EPR and theoretical studies.
Autorzy
Rok wydania
2011
Czasopismo
Numer woluminu
383
Strony
27-34
DOI
10.1016/j.chemphys.2011.03.028
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
EPR spin trapping and theoretical methods such as density functional theory (DFT) as well as combined DFT and quadratic configuration interaction approach (DFT/QCISD) were used to identify the radicals produced in the reaction of oxy-radicals and dimethyl sulfoxide (DMSO) in the presence and absence of α-tocopherol. Additionally, the mixtures of α-tocopherol with linolenic acid and glyceryl trilinoleate as well as bioglycerols (glycerol fractions from biodiesel production) were tested. α-Tocopherol inhibited oxidation of the main decomposition product of DMSO, •CH3 to •OCH3 but did not prevent the transformation process of N-t-butyl-α-phenylnitrone (PBN) into 2-methyl-2-nitrosopropane (MNP). Theoretical investigations confirmed the structures of proposed spin adducts and allowed to correlate the EPR parameters observed in the experiment with the spin adducts electronic structure.
Słowa kluczowe
EPR, DFT, QCISD, Spin trapping, PBN, α-Tocopherol, DMSO
Adres publiczny
https://doi.org/10.1016/j.chemphys.2011.03.028
Strona internetowa wydawcy
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