Fluorescence emission of disperse Red 1 in solution at room temperature.
In this article, we report the fluorescence emission of Disperse Red 1 in solution at room temperature and pumping at 532 nm with a 25 mW diode laser. We have measured its fluorescence quantum yield in methanol, ethylene glycol, glycerol, and phenol obtaining values as high as 10(-3) in the aliphatic alcohols. The excitation spectra of Disperse Red 1 in all four solvents as well as its excitation anisotropy in glycerol are presented. Applying a Gaussian decomposition method to the absorption spectra along with the support from the excitation spectra, the positions of the different transitions in this pseudo-stilbene azobenzene dye were determined. Solvatochromic and isomerization constraint effects are discussed. Calculations using density functional theory at TD-B3LYP/6-31G*//HF/6-31G* level were performed to interpret the experimental observations.
Toro
Carlos
C
Department of Chemistry, University of Central Florida, P.O. Box 162366, Orlando, Florida 382616-2366, USA.
Thibert
Arthur
A
De Boni
Leonardo
L
Masunov
Artëm E
AE
Hernández
Florencio E
FE