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Report No.

Measurement of the reactivity of a novel spin-trapping agent, CYPMPO, by pulse radiolysis study

Midorikawa, Masamichi*; Oka, Toshitaka; Yamashita, Shinichi; Muroya, Yusa*; Lin, M.; Kamibayashi, Masato*; Anzai, Kazunori*; Kudo, Hisaaki*; Katsumura, Yosuke

5-(2,2-dimethyl-1,3-propoxy cyclophosphoryl)-5-methyl-1pyrroline N-oxide (CYPMPO) is a recently developed spin-trapping agent, which is expected to distinguish O$$_{2}^{- cdot}$$ from $$^{cdot}$$OH. We have determined its reactivity with water decomposed radicals, especially with $$^{cdot}$$OH and with e$$^{-}_{rm{aq}}$$ by pulse radiolysis, and compared results with commonly-used spin trapping agent, 5,5-dimethyl-1-pyrroline N-oxide (DMPO). Furthermore, the reactions with oxidative radicals such as $$^{cdot}$$COO$$^{-}$$, NO$$_{2}^{cdot}$$ and Br$$_{2}^{- cdot}$$ have also been investigated.



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