INSTITUTO DE QUIMICA, FISICA DE LOS MATERIALES, MEDIOAMBIENTE Y ENERGIA
Unidad Ejecutora - UE
Solvation in room temperature ionic liquids studied by fluorescence emission of dicyanovinyl julolidine
K. I. GUTKOWSKI; M. L. JAPAS; P. F. ARAMENDIA
CHEMICAL PHYSICS LETTERS
Año: 2006 vol. 426 p. 329 - 329
Steady-state and time-resolved emission of 9-dicyanovinyljulolidine (DCVJ) in 1-butyl 3-methyl imidazolium tetrafluoroborate ([bmim][BF4]) were studied. The emission spectrum of DCVJ, obtained after properly substracting the fluorescence of the solvent, peaks at similar wavelength as in acetonitrile, and its total intensity decreases with temperature, as it does in normal liquids. However, the activation energy of the radiationless process is much lower than that of [bmim][BF4] viscosity, which points to a free volume controlled deactivation for DCVJ excited state.