Excited-state proton transfer of 3-hydroxybenzoic acid and 4-hydroxybenzoic acid

Authors :: Vulpius, D.
Geipel, G.
Bernhard, G.
Source :: Spectrochimica Acta Part A: Molecular & Biomolecular Spectroscopy. Feb2010, Vol. 75 Issue 2, p558-562. 5p.
Publication Year :: 2010
Abstract: Abstract: The excited-state proton transfer of 3-hydroxybenzoic acid and 4-hydroxybenzoic acid was studied by time-resolved laser-induced fluorescence spectroscopy with ultra-short laser pulses. The excited-state reactions were identified in aqueous media as a function of the pH value. Apart from the well-known inversion of the ordinary dissociation properties of these compounds, new species were found which exist only in the excited-state resulting from a temporal and reversible annihilation of the aromatic bond system. These species and their reaction mechanisms were detected by their absorption and fluorescence spectra. [Copyright &y& Elsevier]

Subjects :: *BENZOIC acid
*PROTON transfer reactions
*EXCITED state chemistry
*FLUORESCENCE spectroscopy
*ULTRASHORT laser pulses
*HYDROGEN-ion concentration
*DISSOCIATION (Chemistry)
*REACTION mechanisms (Chemistry)

Language :: English
ISSN :: 13861425
Volume :: 75
Issue :: 2
Database :: Academic Search Index
Journal :: Spectrochimica Acta Part A: Molecular & Biomolecular Spectroscopy
Publication Type :: Academic Journal
Accession number :: 47612389
Full Text :: https://doi.org/10.1016/j.saa.2009.11.016

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