Synthesis of a new stable and water-soluble tris(4- hydroxysulfonyltetrachlorophenyl)methyl radical with selective oxidative capacity

Tetrahedron

Volumn 67, Issue 17, 2011, Pages 3119-3123

  Mesa, Juan Antonio ^a   Velázquez Palenzuela, Amado ^b   Brillas, Enric ^b   Torres, Josep Lluís ^a   Juliá, Luis ^a  

^a CSIC   (Spain)

^b UNIVERSITY OF BARCELONA   (Spain)

Author keywords

Chemosensor; Electron paramagnetic resonance; Free radical; Radical scavenging

Indexed keywords

ASCORBIC ACID; CATECHOL; FREE RADICAL; METHYL GROUP; PYROGALLOL; TRIS(2,3,5,6 TETRACHLOROPHENYL 4 HYDROXYSUFONYL)METHYL RADICAL; TRIS(2,3,5,6 TETRACHLOROPHENYL 4 HYDROXYSULFONYL)METHANE; TRIS(4 HYDROXYSULFONYL TETRACHLOROPHENYL)METHYL RADICAL; UNCLASSIFIED DRUG; WATER;

ARTICLE; CYCLIC POTENTIOMETRY; ELECTROCHEMISTRY; ELECTRON TRANSPORT; OXIDATION; PRIORITY JOURNAL; REACTION ANALYSIS; SYNTHESIS;

EID: 79953713206     PISSN: 00404020     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tet.2011.02.069     Document Type: Article

References (24)

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18. HA of αH-TSPTM in water was calculated from two buffer solutions at pH 12.67±0.01 and 12.98±0.01, and the absorptivity of the colored anion in the UV-vis spectrum.
19. This is a general adopted conformation for the radicals of PTM and TTM series conferring a great stability to these radical species.
20. An example of the stability of radical 1 is that it is practically quantitatively recovered from degassed aqueous solutions after two days in the dark.
21. The spectrum was simulated following the WINSIM program provided by D. Dulog Public EPR Software Tools 1996 National Institute of Environmental Health Sciences Bethesda, MD
22. Freshly prepared solutions of TSPTM trianion radical in water (490.6 μM) and the pyrogallol (47.6 μM) in water were mixed (1:1, v/v) in the spectrometer cell of the EPR (molar ratios between trianion radical and pyrogallol, ∼10:1).
23. Values of the kinetic rate constants of the reactions of TSPTM trianion radical with the reported antioxidants have been carried out following the general kinetic model reported by Dangles et al. P. Goupy, C. Dufour, M. Loonis, and O. Dangles J. Agric. Food Chem. 51 2003 615 622
24. f are the initial and final double integral of the EPR band, respectively, c 0 rad is the initial concentration of the radical and c 0 antiox is the initial concentration of the antioxidant.