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- Title
A Trinuclear Oxo-Chromium(III) Complex Containing the Natural Flavonoid Primuletin: Synthesis, Characterization, and Antiradical Properties.
- Authors
Alexiou, Anamaria D. P.; Decandio, Carla C.; Almeida, Sabrina da N.; Ferreira, Marcelo J. P.; Romoff, Paulete; Rocha, Reginaldo C.
- Abstract
A new trinuclear oxo-centered chromium(III) complex with formula [Cr3O(CH3CO2)6(L)(H2O)2] (L = 5-hydroxyflavone, known as primuletin) was synthetized and characterized by ESI mass spectrometry, thermogravimetry, and 1H-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.
- Subjects
CHROMIUM; FLAVONOIDS; FLAVONES; MASS spectrometry; THERMOGRAVIMETRY; FREE radicals
- Publication
Molecules, 2015, Vol 20, Issue 4, p6310
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules20046310