A Study of the Spectral Properties of Rhodamine (6G&B) DyesMixture Dissolved in Chloroform | ||
| Engineering and Technology Journal | ||
| Article 1, Volume 30, Issue 12, July 2012, Pages 2102-2115 PDF (225.56 K) | ||
| DOI: 10.30684/etj.2012.57259 | ||
| Author | ||
| Slafa I. Ibrahim | ||
| Abstract | ||
| The spectral properties (absorption and fluorescence) of laser dyes (R6G& R B) mixture have been studied; this type of laser dye belongs to the Xanthenes family, and has been dissolved in chloroform to prepare (1*10-5, 2*10-5, 5*10-5, 7*10-5, 1*10-4 M) at room temperature. The achieved results pointed out to an increase in the absorption and fluorescence intensities with the increased concentration which are found in agreement with Beer – Lambert law. These results have been also showed an expansion in the spectral range of absorption and fluorescence with a noticed shift in the direction of longer wavelength. The quantum efficiency of the dissolved Rhodamine mixture in chloroform has been calculated by using the same above concentration (96%, 91%, 80%, 71%, and 66%) respectively. The radiative life time ( 0.21 , 0.41,0.89,1.19 and 1.48 ) ns and fluorescent life time (0.20 , 0.37,0.71,0.84, and 0.97 ) ns respectively . It has been determined that the resulting overlap between the absorption spectrum and fluorescence spectrum for(R 6G&RB) mixture is more than that shown for the every dye alone solution, therefore stock shift will be more. | ||
| Keywords | ||
| Xanthene dyes; Rhodamine; Laser dye; Rhodamine B | ||
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