title: A theoretical study of phenolic compounds with antioxidant properties.
abstract: Quantum chemical calculations at the DFT/B3LYP, HF, and AM1 and PM3 semiempirical levels were employed to calculate a set of molecular properties for 41 phenol compounds with antioxidant activity. The significant molecular descriptors related to the compounds were the vertical ionization potentials (IPvs) and the charge on oxygen atom 7. The IPv has been calculated using Koopman's theorem IPv=-epsilon(HOMO(DFT)), IPv=-epsilon(HOMO(HF)) and as the difference of energy calculations for the corresponding cation and for the neutral form IPv(E(cation)-E(neutral)) obtained with the DFT/B3LYP method. The best model obtained showed not only the statistical significance but also predictive ability.
authors.affiliation: Departamento de Química, Centro de Ciências Exatas e Naturais, Universidade Federal do Pará, CP 11101, 66075-110 Belém, PA, Brazil.
authors.forename: Mauro
authors.initials: M
authors.lastname: Reis
authors.forename: Benedito
authors.initials: B
authors.lastname: Lobato
authors.forename: Jeronimo
authors.initials: J
authors.lastname: Lameira
authors.forename: Alberdan S
authors.initials: AS
authors.lastname: Santos
authors.forename: Cláudio N
authors.initials: CN
authors.lastname: Alves
mesh_terms: D000975:Antioxidants / Q000737:chemistry*; D003198:Computer Simulation; D008956:Models, Chemical; D010636:Phenols / Q000737:chemistry*; D011789:Quantum Theory
chemical_list: D000975:Antioxidants; D010636:Phenols