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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Melo, Maria J.
in Cooperation with on an Cooperation-Score of 37%
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Publications (4/4 displayed)
- 2023Study of the Materials and Techniques of a Rare Papier-Mâché Mushroom Model Crafted in H. Arnoldi Factorycitations
- 2021Yellow lake pigments fromweld in artcitations
- 2011Fucose-containing exopolysaccharide produced by the newly isolated Enterobacter strain A47 DSM 23139citations
- 2003Complexation of aluminum(III) by anthocyanins and synthetic flavylium salts: a source for blue and purple colorcitations
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article
Complexation of aluminum(III) by anthocyanins and synthetic flavylium salts: a source for blue and purple color
Abstract
<p>The single crystal structure of two synthetic flavylium salts possessing a catechol unit in position 7 and 8, (7,8-dihydroxy-4-methylflavylium,7,8- dihydroxyflavylium) is shown. The formation of aluminium complexes with these ligands as well as with the natural anthocyanin, cyanin, and the deoxyanthocyanidin, luteolinidin, both bearing a cathecol unit in position 3′ and 4′, is described. Complexation with Al<sup>3+</sup> stabilizes the blue ionised quinoidal base avoiding its degradation by reaction with oxygen. The simple model developed to describe the complexation, indicates a metal ligand stoichiometry of 1:1. The complexation constants lie between 5.5 × 10<sup>6</sup> < K<sub>cp</sub> < 1.3 × 10<sup>9</sup>.</p>