title: Laser-induced chemical reaction characterization in photosensitive aqueous solutions.
abstract: A dual-wavelength on/off-excitation thermal lens technique was used to identify and quantify a laser-induced chemical reaction in ionic aqueous solutions of Fe(II)-TPTZ. On/off modeling was used to fit the TL experimental data, which provided the primary effect generated during laser-excitation. The addition of HCl in the solutions reduced the activation barrier; this behavior followed the Arrhenius correlation. The nature of the photo-oxidation of Fe(II)-TPTZ complex is discussed. The results suggest that this technique may contribute to the understanding of the dynamics of complex reactions, which may lead to a more precise determination of the physicochemical properties involved in a photochemical reaction.
authors.affiliation: Departamento de Física, Universidade Estadual de Maringá, Av. Colombo 5790, Maringá-PR, 87020-900, Brazil.
authors.forename: L S
authors.initials: LS
authors.lastname: Herculano
authors.forename: N G C
authors.initials: NG
authors.lastname: Astrath
authors.forename: L C
authors.initials: LC
authors.lastname: Malacarne
authors.forename: J H
authors.initials: JH
authors.lastname: Rohling
authors.forename: S T
authors.initials: ST
authors.lastname: Tanimoto
authors.forename: M L
authors.initials: ML
authors.lastname: Baesso