| The intramolecular vibrational energy redistribution threshold in S(1) deuterated p-difluorobenzene. | |
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MedLine Citation:
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PMID: 15294258 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The intramolecular vibrational energy redistribution (IVR) in S(1) deuterated p-difluorobenzene (pDFB-d(4) or -d(4)) has been studied to determine the IVR threshold. For this, the S(1) <-- S(0) fluorescence excitation (FE) spectrum of jet-cooled d(4) was investigated in the 2000-3250 cm(-1) vibronic energy range of the S(1) electronic state, and single vibronic level fluorescence (SVLF) spectra have been acquired by exciting selected levels lying between 750 and 2850 cm(-1) in vibrational energy in the S(1) excited state. Congestion of the dispersed fluorescence in this molecule first appears as the vibrational level energy climbs above 2000 cm(-1). By comparing the SVLF spectra of pDFB-d(4) with those of p-difluorobenzene (pDFB or -h(4)), it is obvious that IVR threshold in -d(4) is localized with a few hundreds cm(-1) lower than that in pDFB. This decrease is entirely due to the increase in vibrational state density due to deuteration. |
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Authors:
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Mariana D Duca |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Volume: 60 ISSN: 1386-1425 ISO Abbreviation: Spectrochim Acta A Mol Biomol Spectrosc Publication Date: 2004 Sep |
Date Detail:
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Created Date: 2004-08-05 Completed Date: 2005-03-01 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9602533 Medline TA: Spectrochim Acta A Mol Biomol Spectrosc Country: England |
Other Details:
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Languages: eng Pagination: 2667-71 Citation Subset: IM |
Affiliation:
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Laboratory of Physics, Department of Chemistry, University of Bucharest, Blvd. Regina Elisabeta 4-12, Bucharest 1, Romania. marianaduca@yahoo.co.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Benzene Derivatives
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chemistry* Deuterium / chemistry* Fluorine / chemistry* Spectrometry, Fluorescence |
| Chemical | |
Reg. No./Substance:
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0/Benzene Derivatives; 7782-39-0/Deuterium; 7782-41-4/Fluorine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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