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Abstract By using electrospray ionization mass spectrometry two types of iron complexes of methoxylated flavonoids were generated. Depending on the flavonoid structure, the complexes corresponded to the ions [(M-H)2+Fe]+ or… Click to show full abstract
Abstract By using electrospray ionization mass spectrometry two types of iron complexes of methoxylated flavonoids were generated. Depending on the flavonoid structure, the complexes corresponded to the ions [(M-H)2+Fe]+ or [M2+FeCl]+, M stands for the flavonoid molecule. The unpaired electrons obtained as a result of methyl loss and iron reduction were shown to have essential influence on collision induced dissociation of ions [(M-H)2+Fe]+, which may be very useful for determination of the attachment position of methyl group. The loss of M molecule from [M2+FeCl]+ ion and the subsequent decomposition of [M + FeCl]+ enable differentiation between flavone and isoflavone, as well as gives valuable information concerning the positions of hydroxyl and methoxyl groups.
Journal Title: International Journal of Mass Spectrometry
Year Published: 2019
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