Experimental investigations on energy-transfer characteristics and performance of some laser dye mixtures |
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Authors: | R Ghazy S A Zim M Shaheen F El-Mekawey |
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Institution: | a Laser Laboratory, Physics Department, Faculty of Sciences, Tanta University, Tanta, Egypt b Chemistry Department, Faculty of Sciences, Tanta University, Tanta, Egypt |
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Abstract: | Energy transfer from both Coumarin 120 (C120) and p-Bis(o-methylstyryl)-benzene (Bis-MSB), energy donors, to coumarin 7(C7) (acceptor) individually has been studied by steady-state emission measurements in methanol. The dye laser characteristics of the above-mentioned dyes have also been studied with respect to the energy transfer mechanism in the same solvent using a pulsed nitrogen laser as a pumping source. The large values of the critical transfer distances, R0, indicate that the dominant mechanism responsible for energy transfer is due to long-range dipole–dipole interaction between the excited donor and ground state acceptor molecule. Both photophysical and photochemical stability of the donors has been examined under the effect of N2 laser pumping. |
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Keywords: | Energy-transfer characteristics Coumarin 120 p-Bis(o-methylstyryl)-benzene |
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