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Studies of the Copigmentation of compounds analogous to anthocyanins

Grant number: 10/00383-9
Support type:Scholarships in Brazil - Doctorate (Direct)
Effective date (Start): April 01, 2010
Effective date (End): March 09, 2014
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
Principal Investigator:Frank Herbert Quina
Grantee:Bárbara Held
Home Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil


The anthocyanins are naturally occurring pigments responsible for the purple, red and blue colors of the majority of fruits and flowers. The basic chromophore of anthocyanins is a flavylium cation, typically substituted with several hydroxyl and/or methoxyl groups. In nature, the color of anthocyanins is modulated and/or stabilized by complexation with metal ions or with colorless organic molecules (a copigment). In this project, we propose a study of the interaction of model compounds analogous to anthocyanins (synthetic hydroxyflavylium ions and hydroxy/methoxyflavylium ions) with metal ions and with organic copigments, as well as a search for synergy in the ternary complexation of these anthocyanin models with both metal ions and copigments. These results will form the basis for an understanding of the anthocyanin-metal ion-copigment interactions involved in the stabilization of the color of anthocyanins in natura. (AU)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
HELD, BARBARA; TANG, HAO; NATARAJAN, PALANI; DA SILVA, CASSIO PACHECO; SILVA, VOLNIR DE OLIVEIRA; BOHNE, CORNELIA; QUINA, FRANK H. Cucurbit[7]uril inclusion complexation as a supramolecular strategy for color stabilization of anthocyanin model compounds. PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES, v. 15, n. 6, p. 752-757, 2016. Web of Science Citations: 20.

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