Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Shunichi Fukuzumi | * |
dc.date.accessioned | 2016-08-28T10:08:44Z | - |
dc.date.available | 2016-08-28T10:08:44Z | - |
dc.date.issued | 2012 | * |
dc.identifier.issn | 1089-5639 | * |
dc.identifier.other | OAK-9196 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/222991 | - |
dc.description.abstract | Kinetics of photoinduced electron transfer from a series of electron donors to the triplet excited state of lithium ion-encapsulated C 60 (Li +@C 60) was investigated in comparison with the corresponding kinetics of the photoinduced electron transfer to the triplet excited state of pristine C 60. Femtosecond laser flash photolysis measurements of Li +@C 60 revealed that singlet excited state of Li +@C 60 (λ max = 960 nm) underwent intersystem crossing to the triplet excited state [ 3(Li +@C 60)*: λ max = 750 nm] with a rate constant of 8.9 × 10 8 s -1 in deaerated benzonitrile (PhCN). The lifetime of 3(Li +@C 60)* was determined by nanosecond laser flash photolysis measurements to be 48 μs, which is comparable to that of C 60. Efficient photoinduced electron transfer from a series of electron donors to 3(Li +@C 60)* occurred to produce the radical cations and Li +@C 60 •-. The rate constants of photoinduced electron transfer of Li +@C 60 •- are significantly larger than those of C 60 when the rate constants are less than the diffusion-limited value in PhCN. The enhanced reactivity of 3(Li +@C 60)* as compared with 3C 60* results from the much higher one-electron reduction potential of Li +@C 60 (0.14 V vs SCE) than that of C 60 (-0.43 V vs SCE). The rate constants of photoinduced electron transfer reactions of Li +@C 60 and C 60 were evaluated in light of the Marcus theory of electron transfer to determine the reorganization energies of electron transfer. The reorganization energy of electron transfer of Li +@C 60 was determined from the driving force dependence of electron transfer rate to be 1.01 eV, which is by 0.28 eV larger than that of C 60 (0.73 eV), probably because of the change in electrostatic interaction of encapsulated Li + upon electron transfer in PhCN. © 2012 American Chemical Society. | * |
dc.language | English | * |
dc.title | Enhanced photoinduced electron-transfer reduction of Li +@C 60 in comparison with C 60 | * |
dc.type | Article | * |
dc.relation.issue | 36 | * |
dc.relation.volume | 116 | * |
dc.relation.index | SCI | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.startpage | 8942 | * |
dc.relation.lastpage | 8948 | * |
dc.relation.journaltitle | Journal of Physical Chemistry A | * |
dc.identifier.doi | 10.1021/jp3059036 | * |
dc.identifier.wosid | WOS:000308631100003 | * |
dc.identifier.scopusid | 2-s2.0-84866319092 | * |
dc.author.google | Kawashima Y. | * |
dc.author.google | Ohkubo K. | * |
dc.author.google | Fukuzumi S. | * |
dc.contributor.scopusid | Shunichi Fukuzumi(35430038100;58409757400) | * |
dc.date.modifydate | 20240401081001 | * |