title: The chemistry of 6-hydroxyflavylium: zwitterionic base and p-quinoidal chalcones. A multiswitchable system operated by proton, electron and photon inputs.
abstract: The complex network of chemical reactions of the compound 6-hydroxyflavylium perchlorate was studied by different techniques including UV-vis absorption spectrophotometry, stopped-flow, electrochemistry, and photochemistry. The network is characterized by the formation of a very reactive zwitterionic base as well as by p-quinoidal chalcones. The trans-chalcone is metastable in very acidic solutions and exhibits reversible redox reactions, allowing to introduce for the first time in the flavylium network an electrochemical input.
authors.affiliation: Departamento de Química Inorganica e Organica, Universidad Jaen, 23071, Spain.
authors.forename: Antonio
authors.initials: A
authors.lastname: Jimenez
authors.forename: Carlos
authors.initials: C
authors.lastname: Pinheiro
authors.forename: A Jorge
authors.initials: AJ
authors.lastname: Parola
authors.forename: Mauro
authors.initials: M
authors.lastname: Maestri
authors.forename: Fernando
authors.initials: F
authors.lastname: Pina