Joint spectroscopic and theoretical investigation of cationic cyanine dye Astrazon Orange-R: Solvent viscosity controlled relaxation of excited states

C. Ley , Patrice Bordat (1) , L.H. Di Stefano , L. Remongin , A. Ibrahim , P. Jacquesa , X. Allonas (2)

1 IPREM - Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux
2 Departement de Photochimie Générale

In this paper, the first study of cationic cyanine dye Astrazon Orange-R by combined spectroscopic and theoretical investigation is presented. It is shown that molecular modeling of Astrazon Orange-R is in very good agreement with experiment, allowing us to gain insight into its complicated photophysics. A solvent viscosity controlled relaxation of excited states, involving cyanine isomerization, is also outlined. © the Owner Societies 2015.

Domaines: Chimie

C. Ley, Patrice Bordat, L.H. Di Stefano, L. Remongin, A. Ibrahim, et al.. Joint spectroscopic and theoretical investigation of cationic cyanine dye Astrazon Orange-R: Solvent viscosity controlled relaxation of excited states. Physical Chemistry Chemical Physics, 2015, 17 (8), pp.5982--5990. ⟨10.1039/c4cp05103c⟩. ⟨hal-01567166⟩