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 strong visible light absorption, the relatively small singlet‐triplet energy differences, the excited state redox potentials and the reasonably long lifetimes of pyranoflavylium triplet states in the absence of molecular oxygen suggest that they might be useful as triplet sensitizers and/or as cationic redox initiators in polar aprotic solvents like acetonitrile.

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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.

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Stability of meoru (Vitis coignetiea) anthocyanins during heating under singlet oxygen to simulate low sugar meoru jam-making was studied. Samples consisted of meoru juice, sugars (sucrose, glucose,

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Oxidative stress is a condition that begins when the redox balance of living organisms is altered by an excessive formation of radical molecules, which exceeds the endogenous antioxidant capacity



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.

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Antioxidant activity of anthocyanins and their aglycons.

Most anthocyanidins and their aglycons acted as strong antioxidants in emulsion and LDL and many compounds showed an activity comparable to the well-known antioxidants alpha-tocopherol, Trolox, catechin, and quercetin.

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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.

Oxygen Radical Absorbing Capacity of Anthocyanins

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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