Absorption Spectrum and Raman Spectroscopy of Coumarin507 Dye Laser in Different Solvents

Abstract

Coumarin dye laser compounds are often used as components in coloring agents and sprays., as well as in the odorization of foods. Therefore, the important of these compounds in many felids leading to growth of several ways aiming to advance the control of pharmaceutical and superficial producing. Solvents play an important role in changing the character of coumarin. The investigated spectral properties, as well as the effect of changing the solvent on this property, have been published. results referred that the molar electronic transition energy increased with decreasing the maximum absorption wavelength, and the highest intensity of the absorption spectrum was in the case of acetone solvent. In addition, many bands appear in Raman shift attributed to the ''C=O'' band, ''O=C–O, C–C'', and ''C–O'' deformation. The characteristic vibrations involving the ''O-H'' group is the stretching and bending modes of the ''O-H'' and ''C-O'' parts.

Spectral Properties of Silica Sol, Gel and Aerogel Doped with Metal Ions and Laser Dyes

“…Absorbance varies with wavelength, peaking at 290 nm. These modifications result from the increased energy level of the dye due to the larger perturbation field acting on the absorbance parameters of the molecules at a wavelength doped with sol-gel dye as the dye concentration [24].…”