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A tri(potassium sulfonate) derivative of perchlorotriphenylmethyl radical (PTM) as a stable water soluble radical-scavenger of the hydroxyl radical more powerful than 5,5-dimethyl-1-pyrroline-N-oxide

AuthorsMesa, Juan Antonio ; Chávez, Sebastián; Fajarí, Lluís ; Torres, Josep Lluís ; Juliá, Lluís
Issue Date16-Apr-2013
PublisherRoyal Society of Chemistry (UK)
CitationRSC Advances 3: 9949- 9956 (2013)
AbstractThe tripotassium salt of tris(2,3,5,6-tetrachloro-4-hydroxysulfonylphenyl) methyl radical (3 K+ TSPTM3-) reacts in water with hydroxyl radical very fast with a rate constant (k = 2.4 × 1011 M-1 s-1) much higher than that of the reaction of hydroxyl radical with the spin trap 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) (k = 3.4 × 109 M-1 s-1). The reaction affects the radical character of the molecule and is monitored by electron paramagnetic resonance (EPR). The hydroxyl radical scavenging is established by the characterization of the resulting water-soluble product as the dipotassium salt of 4-[bis(2,3,5,6-tetrachloro-4-hydroxysulfonylphenyl)methylene]-2,3,5,6- tetrachlorocyclohexa-2,5-dien-1-one (2). © 2013 The Royal Society of Chemistry.
Identifiersdoi: 10.1039/c3ra41499j
issn: 2046-2069
Appears in Collections:(IQAC) Artículos
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