title: Interaction of flavonoids, the naturally occurring antioxidants with different media: a UV-visible spectroscopic study.
abstract: Quantitative parameters for interaction of flavonoids-the naturally occurring antioxidants, with solvents and surfactants are determined using UV-visible absorption spectroscopy. The availability of flavonoids; kaempferol, apigenin, kaempferide and rhamnetin in micelles of sodium dodecyl sulfate (SDS) is reflected in terms of partition coefficient, K(c). Thermodynamic calculations show that the process of transfer of flavonoid molecules to anionic micelles of SDS is energy efficient. A distortion in flavonoid's morphology occurs in case of kaempferol and apigenin in surfactant and water, exhibited in terms of a new band in the UV region of electronic spectra of these flavonoids. The partition coefficients of structurally related flavonoids are correlated with their antioxidant activities.
authors.affiliation: Department of Chemistry, Lahore College for Women University, Lahore, Pakistan.
authors.forename: Bushra
authors.initials: B
authors.lastname: Naseem
authors.forename: S W H
authors.initials: SW
authors.lastname: Shah
authors.forename: Aurangzeb
authors.initials: A
authors.lastname: Hasan
authors.forename: S
authors.initials: S
authors.lastname: Sakhawat Shah
mesh_terms: D000975:Antioxidants / Q000737:chemistry*; D047310:Apigenin / Q000737:chemistry; D005419:Flavonoids / Q000737:chemistry*; D044949:Kaempferols / Q000737:chemistry; D000432:Methanol / Q000737:chemistry*; D008823:Micelles; D011794:Quercetin / Q000031:analogs & derivatives / Q000737:chemistry; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry*; D012995:Solubility; D012996:Solutions; D013056:Spectrophotometry, Ultraviolet; D013057:Spectrum Analysis; D013696:Temperature; D013816:Thermodynamics; D014867:Water / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D005419:Flavonoids; D044949:Kaempferols; D008823:Micelles; D012996:Solutions; D014867:Water; D012967:Sodium Dodecyl Sulfate; C449720:kaempferide; C063423:rhamnetin; C006552:kaempferol; D047310:Apigenin; D011794:Quercetin; D000432:Methanol