Article ID Journal Published Year Pages File Type
1237183 Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 2010 5 Pages PDF
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.

Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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