| Adiabatic Triplet State Tautomerization of <i>p</i>-Hydroxyacetophenone in Aqueous Solution. | |
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MedLine Citation:
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PMID: 22329697 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The primary photophysical processes of p-hydroxyacetophenone (HA) and the ensuing proton trans-fer reactions in aqueous solution were investigated by pi-cosecond pump-probe spectroscopy and nanosecond laser flash photolysis. Previous studies have led to mutually inconsistent conclusions. The combined data allow us to rationalize the excited-state proton transfer processes of HA in terms of a comprehensive, well-established reaction scheme. Following fast and quantitative ISC to the triplet state, 3HA*, adiabatic proton transfer through solvent wa-ter simultaneously forms both the anion, 3A-*, and the qui-noid triplet enol tautomer, 3Q*. The latter subsequently equilibrates with its anion 3A-*. Ionization and tautomeri-zation are likely to compete with the desired release reac-tions of p-hydroxyphenacyl photoremovable protecting groups. |
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Authors:
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L'ubica Klíčová; Peter Sebej; Tomas Solomek; Bruno Hellrung; Petr Slavicek; Petr Klán; Dominik Heger; Jakob Wirz |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-2-13 |
Journal Detail:
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Title: The journal of physical chemistry. A Volume: - ISSN: 1520-5215 ISO Abbreviation: - Publication Date: 2012 Feb |
Date Detail:
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Created Date: 2012-2-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9890903 Medline TA: J Phys Chem A Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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