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dc.contributor.authorShunichi Fukuzumi*
dc.contributor.authorKei Okubo*
dc.date.accessioned2016-08-27T04:08:18Z-
dc.date.available2016-08-27T04:08:18Z-
dc.date.issued2015*
dc.identifier.issn2041-6520*
dc.identifier.issn2041-6539*
dc.identifier.otherOAK-15785*
dc.identifier.urihttps://dspace.ewha.ac.kr/handle/2015.oak/217698-
dc.description.abstractThe catalytic two-electron reduction of dioxygen (O-2) by octamethylferrocene (Me(8)Fc) occurs with a metal-free triphyrin (HTrip) in the presence of perchloric acid (HClO4) in benzonitrile (PhCN) at 298 K to yield Me(8)Fc(+) and H2O2. Detailed kinetic analysis has revealed that the catalytic two-electron reduction of O-2 by Me(8)Fc with HTrip proceeds via proton-coupled electron transfer from Me(8)Fc to HTrip to produce H(3)Tripc(center dot+), followed by a second electron transfer from Me(8)Fc to H(3)Tripc(center dot+) to produce H(3)Trip, which is oxidized by O-2 via formation of the H(3)Trip/O-2 complex to yield H2O2. The rate-determining step in the catalytic cycle is hydrogen atom transfer from H(3)Trip to O-2 in the H(3)Trip/O-2 complex to produce the radical pair (H(3)Tripc(center dot+) HO(2)c) as an intermediate, which was detected as a triplet EPR signal with fine-structure by the EPR measurements at low temperature. The distance between the two unpaired electrons in the radical pair was determined to be 4.9 angstrom from the zero-field splitting constant (D).*
dc.languageEnglish*
dc.publisherROYAL SOC CHEMISTRY*
dc.titleCatalytic two-electron reduction of dioxygen catalysed by metal-free [14]triphyrin(2.1.1)*
dc.typeArticle*
dc.relation.issue11*
dc.relation.volume6*
dc.relation.indexSCI*
dc.relation.indexSCIE*
dc.relation.indexSCOPUS*
dc.relation.startpage6496*
dc.relation.lastpage6504*
dc.relation.journaltitleCHEMICAL SCIENCE*
dc.identifier.doi10.1039/c5sc02465j*
dc.identifier.wosidWOS:000362977000059*
dc.identifier.scopusid2-s2.0-84944051549*
dc.author.googleMase, Kentaro*
dc.author.googleOhkubo, Kei*
dc.author.googleXue, Zhaoli*
dc.author.googleYamada, Hiroko*
dc.author.googleFukuzumi, Shunichi*
dc.contributor.scopusidShunichi Fukuzumi(35430038100;58409757400)*
dc.contributor.scopusidKei Okubo(7101788990)*
dc.date.modifydate20240130092215*


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