title: Self-aggregation processes of 1,6-diphenyl-1,3,5-hexatriene in water/ethanol mixtures with high water percentages.
abstract: This work describes the behavior of 1,6-diphenyl-1,3,5-hexatriene (DPH) in ethanol/water mixtures. The dependence of DPH photophysical properties (absorption and fluorescence emission) on the water percentage in ethanol indicates that DPH undergoes self-aggregation processes in solvent conditions above a critical water content. Evidence such as an additional absorption band, Beer's law deviation, kinetic behavior, and other experimental results obtained from temperature variation and surfactant addition demonstrated the presence of several types of DPH aggregates. Resonance light scattering measurements proved that the aggregate grew in water-rich media by a self-catalyzed process.
authors.affiliation: Departamento de Química, Universidade Estadual de Maringá, PR, Brazil.
authors.forename: Augusto C
authors.initials: AC
authors.lastname: Gracetto
authors.forename: André L
authors.initials: AL
authors.lastname: Tessaro
authors.forename: Vagner R
authors.initials: VR
authors.lastname: De Souza
authors.forename: Wilker
authors.initials: W
authors.lastname: Caetano
authors.forename: Rodrigo M
authors.initials: RM
authors.lastname: Pontes
authors.forename: Vagner R
authors.initials: VR
authors.lastname: Batistela
authors.forename: Hueder P M
authors.initials: HP
authors.lastname: De Oliveira
authors.forename: Noboru
authors.initials: N
authors.lastname: Hioka