Photodissociation of carboxylic acids: dynamics of OH formation |
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| Affiliation: | 1. Department of Internal Medicine, University of Illinois College of Medicine at Peoria;2. Department of Hospital Medicine, Mount Carmel East Hospital, Columbus, Ohio;3. Department of Hospital Medicine, Ascension Columbia St. Mary''s Hospital, Milwaukee, Wis;4. Department of Hospital Medicine, CHI St Vincent Infirmary, Little Rock, Ark;1. Dipartimento di Scienze della Salute, Università di Catanzaro, Viale Europa, 88100 Catanzaro, Italy;2. Dipartimento di Scienze Chimiche, Università degli Studi di Catania, viale Andrea Doria, 6, 95125 Catania, Italy;3. Fondazione RI.MED, Via Bandiera 11, 90133 Palermo, Italy;4. Dipartimento di Farmacia, Università di Pisa, via Bonanno Pisano, 6, 56126 Pisa, Italy;5. Istituto di Biostrutture e Bioimagini—Consiglio Nazionale delle Ricerche (IBB—CNR), Via Paolo Gaifami, 18, 95126 Catania, Italy |
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| Abstract: | In this review article, recent studies on the photodissociation dynamics of carboxylic acids carried out in our laboratory are presented. The dynamics are investigated by mapping the energy partitioning in the nascent photoproduct OH using laser-induced fluorescence spectroscopy. To understand the effect of the nature of the CC bond on the dissociation dynamics, both saturated (acetic) as well as unsaturated (acrylic and propiolic) carboxylic acids are investigated. In all of the carboxylic acids studied, a high percentage of the available energy is partitioned into the product translational state, indicating the presence of an exit barrier in the dissociative potential energy surface. Based on the energy partitioning, the quantum yield and the OH formation rate, the photoexcitation dynamics of carboxylic acids are revealed. |
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