Regular ArticleOxygen-Centered Spin Adducts of 5,5-Dimethyl-1-pyrrolineN-oxide (DMPO) and 2H-Imidazole 1-Oxides
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Intra-Micellar and Extra-Micellar Oxidation in Phosphate and Histidine Buffers Containing Polysorbate 80
2022, Journal of Pharmaceutical SciencesCitation Excerpt :The fluorescence shift is probably an immediate result of ROS addition to the conjugated diene system (Scheme 2, labeled “1–4″) which shortens the overall conjugated system of BODIPY while subsequent reactions render the shortening of the conjugated system irreversible. Scheme 2 representatively shows the addition of an alkoxyl radical to BODIPY because these species have been detected during AAPH decomposition by spin trapping and electron spin resonance (ESR) spectroscopy29,30; analogous addition reactions are possible with hydroxyl and peroxyl radicals where the latter are readily formed during AAPH decomposition and the degradation of PS802. Based on the reported carboxylic acid and aldehydic degradation products,27,28 the addition of radicals to BODIPY appears to occur predominantly in positions 2 and 4.
Sulfonated poly(benzoyl paraphenylene) as a membrane for PEMFC: Ex situ and in situ experiments of thermal and chemical stability
2013, Polymer Degradation and StabilityCitation Excerpt :Moreover, no additional adducts were detected when non-degraded SParmax dispersion was irradiated for 30 min in the presence of H2O2 before the spin trapping experiment. On the basis of the experimental results and literature data, the following scheme for radical formation during polymer degradation is proposed (Fig. 7) [45–49]. After thermal degradation of SParmax, stable radicals were detected by ESR (Fig. 8A).
Characterisation of free radical spin adducts of the cyclic β-phosphorylated nitrone DEPMPO using tandem mass spectrometry
2006, International Journal of Mass SpectrometrySeparation and identification of DMPO adducts of oxygen-centered radicals formed from organic hydroperoxides by HPLC-ESR, ESI-MS and MS/MS
2003, Journal of the American Society for Mass SpectrometryESR study of a biological assay on whole blood: Antioxidant efficiency of various vitamins
2003, Biochimica et Biophysica Acta - General SubjectsOxidative degradation of pharmaceuticals: Theory, mechanisms and inhibition
2001, Journal of Pharmaceutical Sciences