Is it really that the radical trapping agent DMPO can be degraded(not oxidized) by free radicals with forming Carbon dot EPR-C. characteristic peaks? look for the defined references.
I'm not sure the question is written correctly. Could you rephrase it?
ATM, I understand it as a question about whether DMPO adducts decay. The answer is yes, they do. The decay rate depends on their concentration, pH, temperature, presence of other molecules, etc.
Thank you very much for your answer, i think you got it. In environmental chemistry, DMPO is always used to capture free radical e.g. hydroxyl radical (.OH) to form DMPO-OH adducts, verifying the exsitence of these radicals. But sometime carbon-center radical adduct (DMPO-C) can be observed simultaneously. So what is the source of the carbon radical? come from the decay of DMPO adducts?
If there are no other carbon-containing molecules, then C-centred radilcals must originate from the decomposition of DMPO.
I assume in environmental chemistry you have all sorts of carbon-based VOCs? So, maybe from them as well? Or perhaps from CO2, although the CO3.- radical anion should not be stable as a DMPO adduct.
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