@article{oai:repo.qst.go.jp:00080360,
 author = {Nakanishi, Ikuo and Shoji, Yoshimi and Ohkubo, Kei and Ozawa, Toshihiko and Ken-ichiro, Matsumoto and Fukuzumi, Shunichi and Ikuo, Nakanishi and Yoshimi, Shoji and Kei, Ohkubo and Toshihiko, Ozawa and Kenichiro, Matsumoto},
 issue = {77},
 journal = {Chemical Communications},
 month = {Sep},
 note = {A large kinetic isotope effect (KIE, k(H)/k(D)) of 12.8 was observed for the hydrogen-transfer reaction from ascorbic acid to 2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide (PTIO center dot) in a phosphate buffer solution (0.05 M, pH/pD 7.0) at 298 K. The isotopic difference in the activation energies (6.8 kJ mol(-1)) determined from the temperature dependence of the KIE suggests that quantum mechanical tunneling may partly play a role in the reaction, although the isotopic ratio of the Arrhenius prefactor (A(H)/A(D) = 0.86) is within the semiclassical limits.},
 pages = {11505--11507},
 title = {A large kinetic isotope effect in the reaction of ascorbic acid with 2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide (PTIO˙) in aqueous buffer solutions},
 volume = {56},
 year = {2020}
}