A trinuclear oxo-chromium(III) complex containing the natural flavonoid primuletin: Synthesis, characterization, and antiradical properties
Tipo
Artigo
Data de publicação
2015
Periódico
Molecules
Citações (Scopus)
14
Autores
Alexiou A.D.P.
Decandio C.C.
Almeida S.D.N.
Ferreira M.J.P.
Romoff P.
Rocha R.C.
Decandio C.C.
Almeida S.D.N.
Ferreira M.J.P.
Romoff P.
Rocha R.C.
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Resumo
© 2015 by the authors; licensee MDPI.A new trinuclear oxo-centered chromium(III) complex with formula [Cr<inf>3</inf>O(CH<inf>3</inf>CO<inf>2</inf>)<inf>6</inf>(L)(H<inf>2</inf>O)<inf>2</inf>] (L = 5-hydroxyflavone, known as primuletin) was synthetized and characterized by ESI mass spectrometry, thermogravimetry, and <sup>1</sup>H-NMR, UV-Vis, and FTIR spectroscopies. In agreement with the experimental results, DFT calculations indicated that the flavonoid ligand is coordinated to one of the three Cr(III) centers in an O,O-bidentate mode through the 5-hydroxy/4-keto groups. In a comparative study involving the uncoordinated primuletin and its corresponding complex, systematic reactions with the free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) showed that antiradical activity increases upon complexation.
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Assuntos Scopus
Biphenyl Compounds , Chromium , Flavonoids , Free Radicals , Ligands , Magnetic Resonance Spectroscopy , Picrates , Proton Magnetic Resonance Spectroscopy , Spectroscopy, Fourier Transform Infrared , Thermogravimetry