Energy transfer and excited state lifetime of some anthracene laser dyes |
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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: | The lifetimes of some anthrathene derivatives in different solvents have been determined using the phase modulation method. The lifetime of 10-phenyl-2-methyl-9-acetoxyanthracene and 10-(4-acetoxyphenyl)-2-methyl-9-acetoxyanthracene were found to equal 11 and 11 ns in methanol, respectively. Energy transfer from 10-phenyl-2-methyl-9-acetoxyanthracene and 10-(4-acetoxyphenyl)-2-methyl-9-acetoxyanthracene to rhodamine B and rhodamine 110 in different solvents has been studied by using steady-state emission measurements. The large values of the critical transfer distance R0 and the rate constant of energy transfer kET suggest that the mechanism is long-range dipole–dipole energy transfer as described by Förster. |
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Keywords: | Lasers Laser dyes Energy transfer Lifetime |
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