Effect of Solvent on Intensity of Absorption and Fluorescence of Eosin Y Dye and Spectral Properties of Eosin Y Dye

In this pepar, the effect of concentration on the fluorescence and absorption spectra of Eosin yin (ethanol, methanol, and DMF) atconcentrations [1×10^- 4M] and [1×10^5M] was studied. The exctation wavelength of ethanol and methanol was (510 nm), the exctation wavelength of N,NDimethylformamide was (530 nm), and some optical parameters such as the absoption wavelength and fluorescence in the UV-Vis and some graphic relationships were measured such as the relationships between the dielectric constant, orientation polarizability (Δf), and the refractive index.