The oxidation of luteolin, the natural flavonoid dye

Ramešová, Šárka; Sokolová, Romana; Tarábek, Ján; Degano, Ilaria

doi:10.1016/j.electacta.2013.06.136

Cited by 55 publications

(36 citation statements)

References 47 publications

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“…þ0.90 V (A 2 ). In agreement with the electrochemistry reported for flavonoids in solution [41][42][43][44], the processes forming signal A 1 can be attributed to the two-electron, two-proton oxidation of the 3′,4′-dihydroxybenzoic moiety (ring B, see Fig. 1).…”

Section: General Voltammetric Patternsupporting

confidence: 79%

Contact probe voltammetry for in situ monitoring of the reactivity of phenolic tomato (Solanum lycopersicum L.) compounds with ROS

Doménech‐Carbó

Gavara

Hernández‐Muñoz

et al. 2015

Talanta

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Section: General Voltammetric Patternsupporting

confidence: 79%

Contact probe voltammetry for in situ monitoring of the reactivity of phenolic tomato (Solanum lycopersicum L.) compounds with ROS

Doménech‐Carbó

Gavara

Hernández‐Muñoz

et al. 2015

Talanta

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“…S1). These signals can be attributed to the oxidation of polyphenolic compounds, as judged from a comparison with the voltammetric responses of rutin, quercetin, morin and other polyphenolic compounds in the solution phase [40][41][42][43][44] and forming films 45,46 or microparticulate solids. 1 for Eonymus japonicus, Lobularia maritima, Koelrenteria bipinnata and Begonia acerifolia in contact with aqueous acetate buffer, a series of overlapping anodic peaks appear defining clearly different voltammetric patterns.…”

Section: General Voltammetric Patternmentioning

confidence: 99%

“…This process can be accompanied by the oxidation of one of the -OH groups of the ring B coupled with that of the -OH bound to the C3 carbon in the ring C and the oxidation of the 5,7-dihydroxyl groups, occurring at higher potentials. [40][41][42][43][44] The solid state nature of the involved electrochemical processes was assessed by SECM. 2.…”

Section: General Voltammetric Patternmentioning

confidence: 99%

Electrochemistry-based chemotaxonomy in plants using the voltammetry of microparticles methodology

et al. 2015

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A methodology for characterizing vegetal taxonomic groups using microextraction-assisted voltammetry of microparticles is described. It is based on recording the voltammetric response of microparticulate films of polyphenolic compounds of leaf extracts using different organic solvents. As a result, characteristic voltammetric profiles, tentatively defining an electrochemolomic response, are obtained. Bivariant and multivariant chemometric evaluation of the voltammetric responses of such films allows characterizing vegetal families. Analysis of voltammetric responses for a set of species of the Rosales order suggests that electrochemical data can be correlated with phylogenetic trees.

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“…Few studies have dealt with the identification of new formed products from flavonoid degradation. This is because they are unstable and lead to further degradations (Dall'acqua, Miolo, Innocenti, & Cafieri, ; Ramešová, Sokolová, Terábek, & Degano, ). Only Buchner et al () proposed a degradation pathway for quercetin during a thermal process at 100°C under oxygen conditions.…”

Section: Introductionmentioning

confidence: 99%

Effect of heat processing on thermal stability and antioxidant activity of six flavonoids

Chaaban

Ioannou

Chebil

et al. 2017

Journal of Food Processing and Preservation

222

129

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The objective of this paper is on the one hand to study the effect of heat processing (30 to 130°C for 2 h) on the stability and antioxidant activity of six flavonoids (rutin, naringin, eriodictyol, mesquitol, luteolin, and luteolin 7‐O glucoside), and on the other hand to establish the relation structure–activity–stability of these compounds. The dependency on temperature of the six kinetics was well described by the Arrhenius law and the main parameters provided by this model are determined and compared in this paper. Activation energies found were 107.3 kJ/mol for rutin, 100.6 for naringin, 33.3 for mesquitol, 68.2 for eriodictyol, 51.4 for luteolin, and 120 for luteolin 7‐O‐glucoside. The data collected showed that glycosylated flavonoids are more resistant than aglycon flavonoids to heat treatment. Moreover, it was also observed that despite the total degradation of some flavonoids, the treated solutions still have an antioxidant activity. Practical application Flavonoids are mainly consumed in processed foods. Thus, flavonoids often undergo heat processing. Knowing the thermal stability and the evolution of their antioxidant activity are particularly relevant in the field of food processing. The results of this study allow information to be collected on the relationship between heat stability‐flavonoid structure and antioxidant activity. This information will be useful for the formulation of new food products or for the design of new food processes.

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The oxidation of luteolin, the natural flavonoid dye

Cited by 55 publications

References 47 publications

Contact probe voltammetry for in situ monitoring of the reactivity of phenolic tomato (Solanum lycopersicum L.) compounds with ROS

Contact probe voltammetry for in situ monitoring of the reactivity of phenolic tomato (Solanum lycopersicum L.) compounds with ROS

Electrochemistry-based chemotaxonomy in plants using the voltammetry of microparticles methodology

Effect of heat processing on thermal stability and antioxidant activity of six flavonoids

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