engleski

Photoelectron spectroscopy of natural products: Hydroxy-flavones and naringenin

The electronic structures of 3- and 5-hydroxy-flavones, naringenin and 3-bromochromone have been studied by UV photoelectron spectroscopy (UPS) and high-level Green’s function (GF)calculations. Our UPS data show that hydroxyl substitution strongly influences the electronic structures of flavones and flavanones which in turn influences their biological (radical scavenging or antioxidant) activity. In particular, the experimental antioxidant activity correlates with HOMO -ionization energies.

flavonoids ; photoelectron spectroscopy ; radical scavenging activity ; antioxidant activity

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