Jun 15, 2001 · Spin trapping allows the visualization of transient free radical populations by reacting short-lived radicals with a spin trap (typically nitroso or nitrone compounds) to produce persistent aminoxyl spin adduct radicals.

May 1, 2009 · Protonated tertiary amines and N-oxides react yet differently, and yield only one stable hydrogen-bound adduct (MH + + DEMP) with DEMP. Protonated N-oxides can be differentiated from protonated tertiary amines by using previously reported methods based on diagnostic ion–molecule reactions of protonated N-oxides with 2-methoxypropene, dimethyl ...

Jan 13, 2005 · The formation of DMPO−OOH, the spin adduct resulting from trapping superoxide (O 2•-) with 5,5-dimethyl-1-pyrroline N -oxide (DMPO), has been exploited to detect the generation of superoxide in a wide variety of biological and chemical systems.

Jul 15, 2003 · The passive permeation rates of DMPO and DEPMPO spin traps and their hydroxyl radical adducts through liposomal membranes were measured using ESR spectroscopy.

In this paper, I report experiments that demonstrate: That there is very little spontaneous breakdown of DMPO/•OOH to form DMPO/•OH. Keywords: EPR, Spin Trapping, Superoxide, Free Radical, DMPO (5, 5-dimethylpyrroline-N-oxide), Iron.

DMPO forms radical adducts with O-, C-, N-, S-centered radicals that have very distinguishable EPR spectra. This allows the researcher to identify the type of free radical that was formed in a given reaction.

Nov 20, 2024 · We finally present a framework for differentiating between the different types of ions using collision induced fragmentation mass spectra (MS/MS). This work offers a comprehensive investigation into the behavior of radical adducts in ESI-MS to streamline the identification of organic radicals and advance understanding of radical chemistry.

The compound 5-(ethoxycarbonyl)-5-methyl-1-pyrroline N-oxide (EMPO) is a hydrophilic cyclic nitrone spin trap, which, in contrast to DMPO, forms a relatively stable superoxide adduct (t(1/2)=8.6 min) with an EPR spectrum similar to the respective DMPO adduct.

Sep 25, 2010 · The DMPO–O 2 − adduct decomposes under irradiation with light and gives two products which have been identified by EPR.

adduct (DMPO-OH·) at potentials lower than that predicted thermodynamically (for water/HO·) and in the region for DMPO oxidation. Increasing the potential into the water oxidation region, surprisingly, shows a lower DMPO-OH· concentration than when the potential is in the DMPO oxidation region.