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권오훈

Kwon, Oh Hoon
Ultrafast Laser Spectroscopy and Nano-microscopy Lab.
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dc.citation.endPage 8708 -
dc.citation.number 21 -
dc.citation.startPage 8703 -
dc.citation.title PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA -
dc.citation.volume 104 -
dc.contributor.author Kwon, Oh Hoon -
dc.contributor.author Zewail, Ahmed H. -
dc.date.accessioned 2023-12-22T09:15:20Z -
dc.date.available 2023-12-22T09:15:20Z -
dc.date.created 2014-11-13 -
dc.date.issued 2007-05 -
dc.description.abstract The dynamics of excited-state double proton transfer of model DNA base pairs, 7-azaindole dimers, is reported using femtosecond fluorescence spectroscopy. To elucidate the nature of the transfer in the condensed phase, here we examine variation of solvent polarity and viscosity, solute concentration, and isotopic fractionation. The rate of proton transfer is found to be significantly dependent on polarity and on the isotopic composition in the pair. Consistent with a stepwise mechanism, the results support the presence of an ionic intermediate species which forms on the femtosecond time scale and decays to the final tautomeric form on the picosecond time scale. We discuss the results in relation to the molecular motions involved and comment on recent claims of concerted transfer in the condensed phase. The nonconcerted mechanism is in agreement with previous isolated-molecule femtosecond dynamics and is also consistent with the most-recent high-level theoretical study on the same pair. -
dc.identifier.bibliographicCitation PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, v.104, no.21, pp.8703 - 8708 -
dc.identifier.doi 10.1073/pnas.0702944104 -
dc.identifier.issn 0027-8424 -
dc.identifier.scopusid 2-s2.0-34547492394 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/8767 -
dc.identifier.url http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=34547492394 -
dc.identifier.wosid 000246853700007 -
dc.language 영어 -
dc.publisher NATL ACAD SCIENCES -
dc.title Double proton transfer dynamics of model DNA base pairs in the condensed phase -
dc.type Article -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordAuthor 7-azaindole -
dc.subject.keywordAuthor femtochemistry -
dc.subject.keywordAuthor reaction dynamics -
dc.subject.keywordAuthor tautomerization -
dc.subject.keywordPlus HYDROGEN-BONDED COMPLEXES -
dc.subject.keywordPlus 7-AZAINDOLE DIMER -
dc.subject.keywordPlus EXCITED-STATE -
dc.subject.keywordPlus FEMTOSECOND
DYNAMICS
-
dc.subject.keywordPlus MOLECULAR-DYNAMICS -
dc.subject.keywordPlus GAS-PHASE -
dc.subject.keywordPlus ISOTOPE -
dc.subject.keywordPlus NMR -
dc.subject.keywordPlus TAUTOMERISM -
dc.subject.keywordPlus CONTROVERSY -

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