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    Université de Fribourg

    Radicals and radical ions derived from indole, indole-3-carbinol and diindolylmethane

    Błoch-Mechkour, Anna ; Bally, Thomas ; Sikora, Adam ; Michalski, Radosław ; Marcinek, Andrzej ; Gębicki, Jerzy

    In: The Journal of Physical Chemistry A, 2010, vol. 114, no. 25, p. 6787–6794

    The primary products, i.e., the radical cations and radicals obtained on oxidation of the glucobrassicin metabolites (and dietary supplements), indole-3-carbinol (I3C) and diindolylmethane (DIM), and those from parent indole (I) are characterized in an ionic liquid and in Ar matrices. The radical cations of I and I3C are stable toward (photo)deprotonation under these conditions, but the resulting...

    Université de Fribourg

    Mechanistic aspects of alloxan diabetogenic activity: a key role of keto-enol inversion of dialuric acid on ionization

    Czerwiñska, Małgorzata ; Sikora, Adam ; Szajerski, Piotr ; Adamus, Jan ; Marcinek, Andrzej ; Gębicki, Jerzy ; Bednarek, Paweł

    In: The Journal of Physical Chemistry A, 2006, vol. 110, no. 22, p. 7272 -7278

    The inversion of the keto-enol stability order of dialuric acid on ionization was calculated and verified experimentally. The radical cations in both forms were characterized. The spectrum of the keto form was observed upon direct ionization of dialuric acid under matrix conditions, whereas the enol form was formed upon a sequential electron-proton-proton attachment to alloxan under acidic...