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A metalloanthocyanin is a
A metalloanthocyanin is a chemical complex
A coordination complex consists of a central atom or ion, which is usually metallic and is called the ''coordination centre'', and a surrounding array of bound molecules or ions, that are in turn known as ''ligands'' or complexing agents. Many ...
giving color to petals of certain plants.
These complexes are self-assembled, supramolecular metal complex pigment composed of stoichiometric amounts of anthocyanins, flavones, and metal ion
A metal (from Greek μέταλλον ''métallon'', "mine, quarry, metal") is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typicall ...
s. The various colors, such as red, mauve, purple, violet and blue, in ''Hydrangea macrophylla
''Hydrangea macrophylla'' is a species of flowering plant in the family
Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of ...
'' are developed from one simple anthocyanin, delphinidin 3-glucoside forming complexes with metal ions.
Examples
Commelinin, a blue pigment from the flowers of ''Commelina communis
''Commelina communis'', commonly known as the Asiatic dayflower, is an herbaceous annual plant in the dayflower family. It gets its name because the blooms last for only one day. It is native throughout much of East Asia and northern parts o ...
'', is a complex of 4 Mg2+ ions chelating six anthocyanin molecules.
Cyanosalvianin, a blue pigment from the flowers of '' Salvia uliginosa'', is a complex formed of six molecules of the anthocyanin type, six molecules of the flavone type and two magnesium
Magnesium is a chemical element with the symbol Mg and atomic number 12. It is a shiny gray metal having a low density, low melting point and high chemical reactivity. Like the other alkaline earth metals (group 2 of the periodic ta ...
ions.
References
External links
Anthocyanidins {{aromatic-stub