| DOI | Resolve DOI: https://doi.org/10.1063/1.1345876 |
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| Author | Search for: Lochbrunner, S.1; Search for: Schultz, T.1; Search for: Schmitt, M.1; Search for: Shaffer, J. P.1; Search for: Zgierski, M. Z.1; Search for: Stolow, Albert1 |
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| Affiliation | - National Research Council of Canada. NRC Steacie Institute for Molecular Sciences
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| Format | Text, Article |
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| Subject | ab initio calculations; chemical exchanges; excited states; isomerisation; nonradiative transitions; organic compounds; photoelectron spectra; time resolved spectra |
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| Abstract | We investigate the applicability of time-resolved photoelectron spectroscopy to excited state intramolecular proton transfer (ESIPT) and internal conversion dynamics in the model system o-hydroxybenzaldehyde (OHBA) and related compounds. Photoelectron spectra of both the excited state enol and keto tautomers were obtained as a function of pump laser wavelength and pump-probe time delay. The ESIPT was found to occur in less than 50 fs over the whole absorption range of the S1(pipi*) state for both OHBA and its monodeuterated analog, suggestive of a small or nonexistent barrier. The subsequent keto internal conversion rate in OHBA varies from 0.63 to 0.17 ps–1 over the S1(pipi*) absorption band and the OD-deuterated analog shows no significant isotope effect. Based upon ab initio calculations and comparison with the two-ring analog, 1-hydroxy-2-acetonaphthone (HAN), we suggest that the internal conversion dynamics in OHBA is influenced by interactions with a close-lying npi* state. |
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| Publication date | 2001-02-08 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 12339261 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | aaa88659-1e8e-4369-889c-2102f1b366ba |
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| Record created | 2009-09-11 |
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| Record modified | 2020-03-27 |
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