Search Results - "Flavylium"

Journal Article

Chemical reactivity of anthocyanins and its consequences in food science and nutrition

by Dangles, Olivier Fenger, Julie-Anne Published in Molecules (Basel, Switzerland) (07.08.2018)

“...Owing to their specific pyrylium nucleus (C-ring), anthocyanins express a much richer chemical reactivity than the other flavonoid classes. For instance,...”

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Journal Article

Naphtyl- and pyrenyl-flavylium dyads: Synthesis, DFT and optical properties

by Aguilar-Castillo, Bethsy Adriana Sánchez-Bojorge, Nora Aydee Chávez-Flores, David Camacho-Dávila, Alejandro A Pasillas-Ornelas, Eddie Rodríguez-Valdez, Luz-María Zaragoza-Galán, Gerardo Published in Journal of molecular structure (05.03.2018)

“...A one-step preparation of flavylium salts containing naphtyl and pyrenyl moieties is described hereafter. Flavylium salts were successfully characterized by 1H...”

Journal Article

Synthesis and structural characterization of novel pyranoluteolinidin dyes

by Cruz, Luís Sousa, Joana L.C Marinho, Andreia Mateus, Nuno de Freitas, Victor Published in Tetrahedron letters (11.01.2017)

“...[Display omitted] •Three novel pyranoluteolinidins were successful obtained.•The dyes present a wide spectrum of colors: λmax 460 (7); 496 (8); 550nm (9),...”

Journal Article

Anthocyanins and derivatives are more than flavylium cations

by Pina, Fernando Oliveira, Joana de Freitas, Victor Published in Tetrahedron (20.05.2015)

“...Anthocyanins are much more than flavylium cation. At least four other species in moderately acidic solutions are formed constituting a pH reversible network of...”

Journal Article

Steady-state spectroscopy and ultrafast dynamics of flavylium derivatives in the red spectral region

by Ismail, Ahmed H Khyasudeen, M. Faisal Husband, John Ibrahim, A. Ramadan Baqi, Younis Abou-Zied, Osama K Published in Journal of luminescence (01.07.2020)

“...In an effort to enhance the absorption and fluorescence of flavylium in the red spectral region, we synthesized a 2′-hydroxyflavylium derivative (FLV-OH) with...”

Journal Article

Aged red wine pigments as a source of inspiration for organic synthesis—the cases of the color-stable pyranoflavylium and flavylium-(4→8)-flavan chromophores

by Chassaing, Stefan Isorez-Mahler, Géraldine Kueny-Stotz, Marie Brouillard, Raymond Published in Tetrahedron (20.05.2015)

“...Two flavylium-based chromophores peculiar to aged red wine pigments are investigated from a synthetic viewpoint. The condensation between easy-to-prepare...”

Journal Article

Non-thermal stabilization mechanisms of anthocyanins in model and food systems—An overview

by Cavalcanti, Rodrigo N Santos, Diego T Meireles, Maria Angela A Published in Food research international (2011)

“...Phenolic compounds are part of the secondary metabolism of plants and are of great importance for their survival in unfavourable environment. A class of...”

Journal Article

Chemical Applications of Anthocyanins and Related Compounds. A Source of Bioinspiration

by Pina, Fernando Published in Journal of agricultural and food chemistry (23.07.2014)

“...Independently of the natural or synthetic origin, flavylium derivatives follow the same network of chemical reactions. Actually, the flavylium cation is stable...”

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Journal Article

Grape pectic polysaccharides stabilization of anthocyanins red colour: Mechanistic insights

by Fernandes, Ana Raposo, Filomena Evtuguin, Dmitry V Fonseca, Fátima Ferreira-da-Silva, Frederico Mateus, Nuno Coimbra, Manuel A de Freitas, Victor Published in Carbohydrate polymers (01.03.2021)

“...[Display omitted] •Pectic polysaccharides were extracted from Vitis vinifera L. grape skins.•Mv3Glc bound preferentially with homogalacturonan...”

Journal Article

Binding of the five multistate species of the anthocyanin analog 7-β-D-glucopyranosyloxy-4′-hydroxyflavylium to the β-cyclodextrin derivative captisol

by Mendoza, Johan Basílio, Nuno Dangles, Olivier Mora, Nathalie Al Bittar, Sheiraz Pina, Fernando Published in Dyes and pigments (01.08.2017)

“...The host-guest chemistry of the anthocyanin analog 7-β-D-glucopyranosyloxy-4′-hydroxyflavylium (GHF) was studied in the presence of the β-cyclodextrin...”

Journal Article

A nitroso-based fluorogenic probe for rapid detection of hydrogen sulfide in living cells

by Chen, Haihua Gong, Xueyun Liu, Xiawei Li, Zheng Zhang, Jianjian Yang, Xiao-Feng Published in Sensors and actuators. B, Chemical (15.02.2019)

“...[Display omitted] •A turn-on fluorescent probe for H2S has been developed.•The proposed probe employs a nitroso group as the recognition unit.•The proposed...”

Journal Article

Analogs of Natural 3-Deoxyanthocyanins: O-Glucosides of the 4',7-Dihydroxyflavylium Ion and the Deep Influence of Glycosidation on Color

by Basílio, Nuno Al Bittar, Sheiraz Mora, Nathalie Dangles, Olivier Pina, Fernando Published in International journal of molecular sciences (20.10.2016)

“...3-Deoxyanthocyanidins and their -β-d-glucosides are natural pigments abundant in black sorghum. -glycosidation can perturb the acid-base properties of the...”

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Journal Article

A pseudorotaxane formed from a cucurbit[7]uril wheel and a bioinspired molecular axle with pH, light and redox-responsive properties

by Seco, André Diniz, Ana Marta Sarrato, João Mourão, Henrique Cruz, Hugo Parola, A. Jorge Basílio, Nuno Published in Pure and applied chemistry (25.02.2020)

“...A pH-, light- and redox-responsive flavylium-bipyridinium molecular dyad (bioinspired in natural anthocyanins) was synthesized and employed to devise a...”

Journal Article

Photochromism of the complex between 4′-(2-hydroxyethoxy)-7-hydroxyflavylium and β-cyclodextrin, studied by 1H NMR, UV–Vis, continuous irradiation and circular dichroism

by Gago, Sandra Basílio, Nuno Fernandes, Ana Freitas, Victor Quintas, Alexandre Pina, Fernando Published in Dyes and pigments (01.11.2014)

“...The network of chemical reactions of the compound 4′-(2-hydroxyethoxy)-7-hydroxyflavylium and its photochromic properties were studied in the absence and...”

Journal Article

Organic/inorganic hybrid pigments from flavylium cations and palygorskite

by Silva, Gustavo Thalmer M Silva, Cassio P Gehlen, Marcelo H Oake, Jessy Bohne, Cornelia Quina, Frank H Published in Applied clay science (15.09.2018)

“...Features such as color, brightness and fluorescence are extremely important in applications of pigments. Hybrid materials inspired by the ancient Maya Blue...”

Journal Article

On the multistate of 2′-hydroxyflavylium-flavanone system. Illustrating the concept of a timer with reset at the molecular level

by Slavcheva, Stoyanka Mendoza, Johan Stanimirov, Stanislav Petkov, Ivan Basílio, Nuno Pina, Fernando Petrov, Vesselin Published in Dyes and pigments (01.11.2018)

“...The multistate of species regarding 2′-hydroxyflavylium derivatives have a peculiar behavior due to the formation in moderately basic solutions of a flavanone...”

Journal Article

Effect of β‑Cyclodextrin on the Multistate Species Distribution of 3‑Methoxy-4′,7-dihydroxyflavylium. Discrimination of the Two Hemiketal Enantiomers

by Gago, Sandra Basílio, Nuno Quintas, Alexandre Pina, Fernando Published in Journal of agricultural and food chemistry (09.08.2017)

“...The effect of β-cyclodextrin on the mole fraction distribution of the multistate species of the anthocyanin model compound, 3-methoxy-4′,7-dihydroxyflavylium,...”

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Journal Article

Chemistry and Photochemistry of Anthocyanins and Related Compounds: A Thermodynamic and Kinetic Approach

by Basílio, Nuno Pina, Fernando Published in Molecules (Basel, Switzerland) (10.11.2016)

“...Anthocyanins are identified by the respective flavylium cation, which is only one species of a multistate of different molecules reversibly interconverted by...”

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Journal Article

Chemically synthesized glycosides of hydroxylated flavylium ions as suitable models of anthocyanins: binding to iron ions and human serum albumin, antioxidant activity in model gas...

by Al Bittar, Sheiraz Mora, Nathalie Loonis, Michèle Dangles, Olivier Published in Molecules (Basel, Switzerland) (11.12.2014)

“...Polyhydroxylated flavylium ions, such as 3',4',7-trihydroxyflavylium chloride (P1) and its more water-soluble 7-O-β-d-glucopyranoside (P2), are readily...”

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Journal Article

Impact of Lignosulfonates on the Thermodynamic and Kinetic Parameters of Malvidin-3‑O‑glucoside in Aqueous Solutions

by Araújo, Paula Basílio, Nuno Fernandes, Ana Mateus, Nuno de Freitas, Victor Pina, Fernando Oliveira, Joana Published in Journal of agricultural and food chemistry (27.06.2018)

“...The interaction of malvidin-3-O-glucoside (1) and a lignosulfonate was studied by UV–visible spectroscopy, and the results obtained showed the formation of a...”

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