Fluorescence emission of disperse red 1 in solution at room temperature
Abbreviated Journal Title
J. Phys. Chem. B
AZO COMPOUNDS; PHOTOISOMERIZATION; AZOBENZENE; ISOMERIZATION; DERIVATIVES; ABSORPTION; MOLECULES; MECHANISM; DYNAMICS; SPECTRA; Chemistry, Physical
In this article, we report the fluorescence emission of Disperse Red I 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 I 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.
Journal of Physical Chemistry B
"Fluorescence emission of disperse red 1 in solution at room temperature" (2008). Faculty Bibliography 2000s. 1062.