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Petrov, V, Gomes R, Parola AJ, Jesus A, Laia CAT, Pina F.  2008.  2 '-hydroxyflavylium: introducing flavanones into the flavylium network of chemical reactions, 2008. Tetrahedron. 64:714-720. Abstract

Chalcones possessing a hydroxyl group in position 2 cyclize to form flavylium salts in acidic media, this reaction being reversible under neutral-basic conditions. On the other hand, chalcones possessing a hydroxyl group in position 2' cyclize to form flavanones in basic media. By synthesizing 2'-hydroxyflavylium tetrafluoroborate, it was possible to obtain trans-2,2'-dihydroxychalcone that in solution can evolve to 2'-hydroxyflavanone or back to 2'-hydroxyflavylium depending on the pH. The several equilibria established in aqueous solution were fully characterized. The importance of including flavanones into the flavylitun network of chemical reactions is briefly exploited. (C) 2007 Elsevier Ltd. All rights reserved.

Moro, AJ, Parola AJ, Pina F, Pana AM, Badea V, Pausescu I, Shova S, Cseh L.  2017.  2,2'-Spirobis chromene Derivatives Chemistry and Their Relation with the Multistate System of Anthocyanins, 2017. Journal of Organic Chemistry. 82(10):5301-5309. Abstract
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Rodriguez, L, Lima JC, Ferrer M, Rossell O, Engeser M.  2012.  3D Au-Ag heterometallic supramolecular cage: Triplet capture by heavy atom effect. Inorganica Chimica Acta. 381:195-202. Abstract
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Gavara, R, Gago S, Jordao N, Pina F.  2014.  4 '-Carboxy-7-hydroxyflavylium. A Multistate System Involving Twelve Species Reversibly lnterconverted by pH and Light Stimuli. Journal of Physical Chemistry A. 118:4723-4731., Number 26 Abstract
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Sequeira, SO, Coutinho ML, Lima JC, Phillips AJL, Macedo MF, Cabrita EJ.  2016.  4-MUF-NAG for fungal biomass determination: Scope and limitations in the context of biodeterioration studies, 2016. Journal of Cultural Heritage. 22:992-998. Abstract
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de Sa, MH, Ferreira JL, Melo MJ, Ramos AM.  2011.  An AFM contribution to the understanding of surface effects caused by ageing and cleaning on acrylic glass. The Shadows by Lourdes Castro, a case study. Surface and Interface Analysis. 43:1165-1170., Number 8 Abstract
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de Sa, MH, Eaton P, Ferreira JL, Melo MJ, Ramos AM.  2011.  Ageing of vinyl emulsion paints - an atomic force microscopy study. Surface and Interface Analysis. 43:1160-1164., Number 8 Abstract
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Pinto, A, Svahn N, Lima JC, Rodriguez L.  2017.  Aggregation induced emission of gold(I) complexes in water or water mixtures, 2017. Dalton Transactions. 46(34):11125-11139. Abstract
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Miguel, C, Pinto JV, Clarke M, Melo MJ.  2014.  The alchemy of red mercury sulphide: The production of vermilion for medieval art. Dyes and Pigments. 102:210-217. Abstract
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Abrantes, M, Paz FAA, Valente AA, Pereira CCL, Gago S, Rodrigues AE, Klinowski J, Pillinger M, Goncalves IS.  2009.  Amino acid-functionalized cyclopentadienyl molybdenum tricarbonyl complex and its use in catalytic olefin epoxidation. Journal of Organometallic Chemistry. 694:1826-1833., Number 12 Abstract
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Petrov, V, Pina F.  2010.  Analytical resolution of the reaction rates of flavylium network by Laplace transform. Journal of Mathematical Chemistry. 47:1005-1026., Number 3 Abstract
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Rodriguez, L, Lima JC, Parola JA, Pina F, Meitz R, Aucejo R, Garcia-Espana E, Llinares JM, Soriano C, Alarcon J.  2008.  Anion detection by fluorescent Zn(II) complexes of functionalized polyamine ligands. Inorganic Chemistry. 47:6173-6183., Number 14 Abstract
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Portugal, CAM, Crespo JG, Lima JC.  2006.  Anomalous "unquenching" of the fluorescence decay times of beta-lactoglobulin induced by the known quencher acrylamide. Journal of Photochemistry and Photobiology B-Biology. 82:117-126., Number 2 Abstract
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Dias, FB, Lima JC, Macanita AL, Clarson SJ, Horta A, Pierola IF.  2000.  Anomalous fluorescence of linear poly(methylphenylsiloxane) in dilute solution at temperatures below-50 degrees C. Macromolecules. 33:4772-4779., Number 13 Abstract
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Pina, F, Oliveira J, de Freitas V.  2015.  Anthocyanins and derivatives are more than flavylium cations. Tetrahedron. 71:3107-3114., Number 20 Abstract

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Pina, F, Oliveira J, de Freitas V.  2015.  Anthocyanins and derivatives are more than flavylium cations, 2015. Tetrahedron. 71(20):3107-3114. Abstract
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Pina, F.  2014.  Anthocyanins and related compounds. Detecting the change of regime between rate control by hydration or by tautomerization. Dyes and Pigments. 102:308-314. Abstract
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Ferraz, R, Teixeira V, Rodrigues D, Fernandes R, Prudencio C, Noronha JP, Petrovski Z, Branco LC.  2014.  Antibacterial activity of Ionic Liquids based on ampicillin against resistant bacteria. Rsc Advances. 4:4301-4307., Number 9 Abstract
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Ferraz, R, Costa-Rodrigues J, Fernandes MH, Santos MM, Marrucho IM, Rebelo LPN, Prudencio C, Noronha JP, Petrovski Z, Branco LC.  2015.  Antitumor Activity of Ionic Liquids Based on Ampicillin. Chemmedchem. 10:1480-1483., Number 9 Abstract
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Ferraz, R, Costa-Rodrigues J, Fernandes MH, Santos MM, Marrucho IM, Rebelo LPN, Prudencio C, Noronha JP, Petrovski Z, Branco LC.  2015.  Antitumor Activity of Ionic Liquids Based on Ampicillin, 2015. Chemmedchem. 10(9):1480-1483. Abstract
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Sotomayor, J, Santos H, Pina F.  1991.  APPLICATION OF CO-59 NMR TO THE INVESTIGATION OF INTERACTIONS BETWEEN COBALT SEPULCHRATE AND VARIOUS COUNTERIONS. Canadian Journal of Chemistry-Revue Canadienne De Chimie. 69:567-569., Number 3 Abstract
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Ferreira, FC, Branco LC, Kaushal KVA, Crespo JG, Afonso CAM.  2007.  Application of nanofiltration to re-use the sharpless asymmetric dihydroxylation catalytic system. Tetrahedron-Asymmetry. 18:1637-1641., Number 14 Abstract
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Lima, JC, Rodriguez L.  2011.  Applications of gold(I) alkynyl systems: a growing field to explore. Chemical Society Reviews. 40:5442-5456., Number 11 Abstract
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Sousa, M, Melo MJ, Casimiro T, Aguiar-Ricardo A.  2007.  The art of CO2 for art conservation: a green approach to antique textile cleaning. Green Chemistry. 9:943-947., Number 9 Abstract
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Pina, F, Melo MJ, Maestri M, Passaniti P, Balzani V.  2000.  Artificial chemical systems capable of mimicking some elementary properties of neurons. Journal of the American Chemical Society. 122:4496-4498., Number 18 Abstract
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