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Excited-state intramolecular proton transfer in 3-hydroxylflavone isolated in solid argon: fluoroescence and fluorescence-excitation spectra and tautomer fluorescence rise time
Dick, Bernhard and Ernsting, Niko P. (1987) Excited-state intramolecular proton transfer in 3-hydroxylflavone isolated in solid argon: fluoroescence and fluorescence-excitation spectra and tautomer fluorescence rise time. Journal of Physical Chemistry 91 (16), pp. 4261-4265.Date of publication of this fulltext: 05 Aug 2009 13:50
Article
DOI to cite this document: 10.5283/epub.5505
Abstract
The fluorescence properties of 3-hydroxyflavone isolated in solid Ar at 15 K were investigated. Upon electronic excitation the mols. undergo rapid intramol. H+ transfer. No fluorescence from the excited state of the normal form of the mol. was detected. Perturbations due to H-bonding impurities which produce serious exptl. problems in hydrocarbon glasses are largely suppressed in Ar matrixes. The ...
The fluorescence properties of 3-hydroxyflavone isolated in solid Ar at 15 K were investigated. Upon electronic excitation the mols. undergo rapid intramol. H+ transfer. No fluorescence from the excited state of the normal form of the mol. was detected. Perturbations due to H-bonding impurities which produce serious exptl. problems in hydrocarbon glasses are largely suppressed in Ar matrixes. The rise of the green fluorescence of the tautomer was studied with excitation pulses of 230-fs duration and streak camera detection. An apparent tautomer fluorescence rise time of 2.7 ps was obtained by deconvolution. A comparative measurement of the dye coumarin 6 yielded an apparent fluorescence risetime of 2.5 ps, which can be entirely attributed to the group velocity dispersion of the streak camera optics. The rate const. for excited-state intramol. H+ transfer in 3-hydroxyflavone is >1012 s-1.
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| Item type | Article | ||||||
| Journal or Publication Title | Journal of Physical Chemistry | ||||||
| Publisher: | American Chemical Society | ||||||
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| Volume: | 91 | ||||||
| Number of Issue or Book Chapter: | 16 | ||||||
| Page Range: | pp. 4261-4265 | ||||||
| Date | 1987 | ||||||
| Additional Information (public) | CAN 107:67074 73-5 Optical, Electron, and Mass Spectroscopy and Other Related Properties 7440-37-1 (Argon) Role: PRP (Properties) (fluorescence and proton transfer of hydroxylflavone and coumarin 6 isolated in solid); 577-85-5 (3-Hydroxyflavone) Role: RCT (Reactant), RACT (Reactant or reagent) (fluorescence and proton transfer of, in solid argon); 38215-36-0 Role: PRP (Properties) (fluorescence of, in solid argon); 12408-02-5 Role: PRP (Properties) (protonation and Proton transfer reaction, of hydroxyflavone isolated in solid argon) | ||||||
| Institutions | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry III - Physical Chemistry (Molecular Spectroscopy and Photochemistry) > Prof. Dr. Bernhard Dick | ||||||
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| Keywords | Protonation and Proton transfer reaction; Tautomerism and Tautomers (of hydroxyflavone isolated in solid argon); Fluorescence (of hydroxyflavone isolated in solid argon at low temps.); proton transfer hydroxyflavone argon; flavone hydroxy proton transfer fluorescence | ||||||
| Dewey Decimal Classification | 500 Science > 540 Chemistry & allied sciences | ||||||
| Status | Published | ||||||
| Refereed | Yes, this version has been refereed | ||||||
| Created at the University of Regensburg | No | ||||||
| URN of the UB Regensburg | urn:nbn:de:bvb:355-epub-55054 | ||||||
| Item ID | 5505 |
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