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Article: Time-resolved resonance Raman study of the triplet state of the p-hydroxyphenacyl acetate model phototrigger compound

TitleTime-resolved resonance Raman study of the triplet state of the p-hydroxyphenacyl acetate model phototrigger compound
Authors
Issue Date2004
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/jpcbfk
Citation
Journal Of Physical Chemistry B, 2004, v. 108 n. 26, p. 9264-9276 How to Cite?
AbstractPicosecond and nanosecond time-resolved resonance Raman spectroscopy have been used to study the dynamics and structure of the phototrigger compound p-hydroxyphenacyl acetate (HPA) in acetonitrile solution. An intermediate was observed that exhibited significant quenching by oxygen. This intermediate was identified and attributed to the ππ* triplet state of HPA. Temporal evolution at early picosecond times indicates rapid intersystem crossing conversion and subsequent relaxation of the excess energy of the initially formed triplet state. B3LYP/6-311G** density functional theory (DFT) calculations were done to determine the structures and vibrational frequencies for both the HPA triplet and ground states. The experimental and theoretical results were compared and discussed in relation to the initial pathway for the p-hydroxyphenacyl deprotection reaction and the nature of the triplet state relative to other aromatic carbonyl compounds. The present results demonstrate the utility of applying ultrafast vibrational spectroscopy to study the mechanism of the photorelease process in phototrigger compounds.
Persistent Identifierhttp://hdl.handle.net/10722/167998
ISSN
2015 Impact Factor: 3.187
2015 SCImago Journal Rankings: 1.414
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorMa, Cen_US
dc.contributor.authorChan, WSen_US
dc.contributor.authorKwok, WMen_US
dc.contributor.authorZuo, Pen_US
dc.contributor.authorPhillips, DLen_US
dc.date.accessioned2012-10-08T03:13:55Z-
dc.date.available2012-10-08T03:13:55Z-
dc.date.issued2004en_US
dc.identifier.citationJournal Of Physical Chemistry B, 2004, v. 108 n. 26, p. 9264-9276en_US
dc.identifier.issn1520-6106en_US
dc.identifier.urihttp://hdl.handle.net/10722/167998-
dc.description.abstractPicosecond and nanosecond time-resolved resonance Raman spectroscopy have been used to study the dynamics and structure of the phototrigger compound p-hydroxyphenacyl acetate (HPA) in acetonitrile solution. An intermediate was observed that exhibited significant quenching by oxygen. This intermediate was identified and attributed to the ππ* triplet state of HPA. Temporal evolution at early picosecond times indicates rapid intersystem crossing conversion and subsequent relaxation of the excess energy of the initially formed triplet state. B3LYP/6-311G** density functional theory (DFT) calculations were done to determine the structures and vibrational frequencies for both the HPA triplet and ground states. The experimental and theoretical results were compared and discussed in relation to the initial pathway for the p-hydroxyphenacyl deprotection reaction and the nature of the triplet state relative to other aromatic carbonyl compounds. The present results demonstrate the utility of applying ultrafast vibrational spectroscopy to study the mechanism of the photorelease process in phototrigger compounds.en_US
dc.languageengen_US
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/jpcbfken_US
dc.relation.ispartofJournal of Physical Chemistry Ben_US
dc.titleTime-resolved resonance Raman study of the triplet state of the p-hydroxyphenacyl acetate model phototrigger compounden_US
dc.typeArticleen_US
dc.identifier.emailMa, C:macs@hkucc.hku.hken_US
dc.identifier.emailPhillips, DL:phillips@hku.hken_US
dc.identifier.authorityMa, C=rp00758en_US
dc.identifier.authorityPhillips, DL=rp00770en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1021/jp0376020en_US
dc.identifier.scopuseid_2-s2.0-3142758684en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-3142758684&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume108en_US
dc.identifier.issue26en_US
dc.identifier.spage9264en_US
dc.identifier.epage9276en_US
dc.identifier.isiWOS:000222279100073-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridMa, C=7402924979en_US
dc.identifier.scopusauthoridChan, WS=35067933100en_US
dc.identifier.scopusauthoridKwok, WM=7103129332en_US
dc.identifier.scopusauthoridZuo, P=35068878800en_US
dc.identifier.scopusauthoridPhillips, DL=7404519365en_US

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