Singlet oxygen quenching by anthocyanin's flavylium cations

  title={Singlet oxygen quenching by anthocyanin's flavylium cations},
  author={Veridiana Vera de Rosso and Faustino E. Mor{\'a}n Vieyra and Adriana Zerlotti Mercadante and Claudio D. Borsarelli},
  journal={Free Radical Research},
  pages={885 - 891}
The quenching of singlet molecular oxygen (1O2) by the flavylium cation form of six widespread anthocyanin derivatives: cyanidin 3-glucoside (CG), cyanidin 3-rutinoside (CR), cyanidin 3-galactoside (CGL), malvidin (M), malvidin 3-glucoside (MG) and malvidin 3,5-diglucoside (MDG) was studied in 1% HCl methanol solution by time-resolved phosphorescence detection (TRPD) of 1O2 and photostationary actinometry using perinaphthenone and methylene blue as sensitizers, respectively. The average value… 

Chemical quenching of singlet oxygen by betanin.

  • M. WendelS. Nizinski G. Burdziński
  • Chemistry
    Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology
  • 2016
LC-MS/MS analysis of the photolyzed solutions supports the product identification as 2-decarboxy-2,3-dehydrobetanin, based on the molecular ion [M](+) observed at m/z 505, and betanin also undergoes a similar photooxidation reaction.

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The theoretical calculations for both the gas and solution phases at the B3LYP level of theory for the Osanger reaction field model agreed with the experimental findings, thus supporting the characterization of the antioxidant mechanism of the Z. punctata flavonoids.

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Correlation among Singlet-Oxygen Quenching, Free-Radical Scavenging, and Excited-State Intramolecular-Proton-Transfer Activities in Hydroxyflavones, Anthocyanidins, and 1-Hydroxyanthraquinones.

Singlet-oxygen (1O2) quenching, free-radical scavenging, and excited-state intramolecular proton-transfer (ESIPT) activities of hydroxyflavones, anthocyanidins, and 1-hydroxyanthraquinones were

Triplet Excited States and Singlet Oxygen Production by Analogs of Red Wine Pyranoanthocyanins

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Cyanidin 3-O-galactoside: A Natural Compound with Multiple Health Benefits

The antioxidant properties and other health effects, including anti-inflammatory, anticancer, antidiabetic, anti-toxicity, cardiovascular, and nervous protective capacities, are highlighted in purified Cy3Gal and in its combination with other polyphenols.

A DFT and QSAR study of the role of hydroxyl group, charge and unpaired-electron distribution in anthocyanidin radical stabilization and antioxidant activity

Density function theory study was conducted to examine the structure, planarity, and charge and unpaired electron delocalization of some anthocyanidins and monohydroxy flavylium ions as well as all



Kinetic study of the quenching reaction of singlet oxygen by flavonoids in ethanol solution.

The quenching rate of singlet oxygen (1O2) by seven kinds of flavonoids with 2,3-double bonds has been measured spectrophotometrically in ethanol at 35 degrees C, and the result suggests that these flavonoid may contribute to the protection of oxidative damage in foods and plants, by quenched 1O2.

Singlet Oxygen Quenching Abilities of Carotenoids

The bimolecular rate constants kq for quenching of singlet oxygen (1Δg state) by 26 different natural and novel synthetic carotenoids were determined at 37 °C in a mixture of chloroform and ethanol.

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Redox Behavior of Anthocyanins Present in Vitis vinifera L.

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Anthocyanins Protect Against A2E Photooxidation and Membrane Permeabilization in Retinal Pigment Epithelial Cells¶

Nine anthocyanin fractions reflecting monoglycosides of delphinidin, cyanid in, petunidin and malvidin were obtained and all were shown to suppress the photooxidation of A2E at least in part by quenching singlet oxygen.

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Anthocyanins are natural colorants belonging to the flavonoid family. They are widely distributed among flowers, fruits, and vegetables. Using the automated oxygen radical absorbance capacity (ORAC)

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UVA Self‐Photosensitized Oxygenation of β‐Ionone

The steady‐state UVA (350 nm) photolysis of (E)‐β‐ionone (1) in aerated toluene solutions was studied by 1H NMR spectroscopy. The formation of the 1,2,4‐trioxane (2) and 5,8‐endoperoxide (5)