A Trinuclear Oxo-Chromium(III) Complex Containing the Natural Flavonoid Primuletin: Synthesis, Characterization, and Antiradical Properties
Abstract
:1. Introduction
2. Results and Discussion
Compound | Dehydration Process | Decomposition Process | ||||
---|---|---|---|---|---|---|
ΔT (°C) | Δmexp (%) | Δmcalc (%) | ΔT (°C) | Δmexp (%) | Δmcalc (%) | |
Cr3O | 25–158 | 14.5 | 14.4 | 158–600 | 39.5 | 38.3 (4Ac−) |
HPri | – | – | – | 190–232 | 100 | 100 |
Cr3O-Pri | 25–97 | 4.5 | 4.6 | 97–272 | 7.4 | 7.4 (1Ac−) |
272–585 | 28.9 | 29.7 (Pri) | ||||
585–860 | 22.2 | 22.1 (3Ac−) |
Compound | Band II (π→π *) | Band I (π→π *) | Ligand Field (d→d) |
---|---|---|---|
HPri | 273 (2.8 × 104) | 337 (8.0 × 103) | – |
Cr3O-Pri | 301 (2.9 × 104) | 426 (8.1 × 103) | – (a) |
Cr3O | – | – | 442, 588 (<100) |
Compound | Flavonoid | Acetate | Cr-O | |||
---|---|---|---|---|---|---|
ν(C=O) | ν(C2=C3) | δ(C-OH) | νs(COO) | νas(COO) | ||
Cr3O | – | – | – | 1450 vs | 1611 vs | 665 s 442 m |
primuletin | 1655 vs | 1587 w | 1319 vw | – | – | – |
Cr3O-Pri | 1626 vs | 1576 w | – | 1445 vs | 1593 m | 627 w |
525 w |
Compound | ΔAbs | [DPPHseq] | [flav] | n |
---|---|---|---|---|
HPri | 0.017 | 1.50 × 10−6 | 1.01 × 10−5 | 0.155 |
Cr3O-Pri | 0.020 | 1.77 × 10−6 | 2.50 × 10−6 | 0.734 |
3. Experimental Section
3.1. Synthesis of [Cr3O(CH3CO2)6(Pri)(H2O)2]
3.2. Computational Details
4. Conclusions
Supplementary Materials
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Alexiou, A.D.P.; Decandio, C.C.; Almeida, S.D.N.; Ferreira, M.J.P.; Romoff, P.; Rocha, R.C. A Trinuclear Oxo-Chromium(III) Complex Containing the Natural Flavonoid Primuletin: Synthesis, Characterization, and Antiradical Properties. Molecules 2015, 20, 6310-6318. https://doi.org/10.3390/molecules20046310
Alexiou ADP, Decandio CC, Almeida SDN, Ferreira MJP, Romoff P, Rocha RC. A Trinuclear Oxo-Chromium(III) Complex Containing the Natural Flavonoid Primuletin: Synthesis, Characterization, and Antiradical Properties. Molecules. 2015; 20(4):6310-6318. https://doi.org/10.3390/molecules20046310
Chicago/Turabian StyleAlexiou, Anamaria D. P., Carla C. Decandio, Sabrina Da N. Almeida, Marcelo J. P. Ferreira, Paulete Romoff, and Reginaldo C. Rocha. 2015. "A Trinuclear Oxo-Chromium(III) Complex Containing the Natural Flavonoid Primuletin: Synthesis, Characterization, and Antiradical Properties" Molecules 20, no. 4: 6310-6318. https://doi.org/10.3390/molecules20046310
APA StyleAlexiou, A. D. P., Decandio, C. C., Almeida, S. D. N., Ferreira, M. J. P., Romoff, P., & Rocha, R. C. (2015). A Trinuclear Oxo-Chromium(III) Complex Containing the Natural Flavonoid Primuletin: Synthesis, Characterization, and Antiradical Properties. Molecules, 20(4), 6310-6318. https://doi.org/10.3390/molecules20046310