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김영삼

Kim, Yung Sam
Ultrafast 2D IR Spectroscopy Lab.
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dc.citation.endPage 11190 -
dc.citation.number 32 -
dc.citation.startPage 11185 -
dc.citation.title PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OFAMERICA -
dc.citation.volume 102 -
dc.contributor.author Kim, Yung Sam -
dc.contributor.author Hochstrasser, RM -
dc.date.accessioned 2023-12-22T10:14:55Z -
dc.date.available 2023-12-22T10:14:55Z -
dc.date.created 2014-11-14 -
dc.date.issued 2005-08 -
dc.description.abstract The involvement of chemical exchange in 2D IR heterodyne echo spectroscopy is characterized through the hydrogen-bond exchange between CH3OH and the CN of CH3CN. The exchange dynamics on the hydrogen-bond potential surfaces associated with different quantum states of the high-frequency CN stretching mode contributes to strong cross peaks between CN groups in two different chemical configurations and provides firm evidence of the hydrogen exchange between them. In analogy with NMR, the chemical exchange is seen in both slow and dynamic regimes. The relative magnitudes of the cross peaks at various population periods measure the picosecond regime time constants for H-bond transfer, whereas the temperature dependences indicate that the activation energy for the exchange from the H-bonded state to the free state is ≈6.2 kJ·mol-1. The results suggest that the hydrogen-bond dynamics is very similar in both vibrational quantum states of CN, suggesting that this stretching mode is not strongly coupled to the H-bond breaking reaction coordinate. The likely manifestations of chemical exchange in 2D IR experiments are discussed. -
dc.identifier.bibliographicCitation PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OFAMERICA, v.102, no.32, pp.11185 - 11190 -
dc.identifier.doi 10.1073/pnas.0504865102 -
dc.identifier.issn 0027-8424 -
dc.identifier.scopusid 2-s2.0-23844509509 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/8961 -
dc.identifier.url http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=23844509509 -
dc.identifier.wosid 000231253400013 -
dc.language 영어 -
dc.publisher NATL ACAD SCIENCES -
dc.title Chemical exchange 2D IR of hydrogen-bond making and breaking -
dc.type Article -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordAuthor photon echo -
dc.subject.keywordAuthor nonlinear spectroscopy -
dc.subject.keywordAuthor dynamic exchange -
dc.subject.keywordAuthor liquid -
dc.subject.keywordPlus 2-DIMENSIONAL INFRARED-SPECTROSCOPY -
dc.subject.keywordPlus AMIDE-I -
dc.subject.keywordPlus N-METHYLACETAMIDE -
dc.subject.keywordPlus PHOTON-ECHOES -
dc.subject.keywordPlus VIBRATIONAL DYNAMICS -
dc.subject.keywordPlus 2D-IR SPECTROSCOPY -
dc.subject.keywordPlus ALANINE
DIPEPTIDE
-
dc.subject.keywordPlus LIQUID WATER -
dc.subject.keywordPlus TIME -
dc.subject.keywordPlus PEPTIDES -

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