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The ground state recovery process of malachite green in water and ethylene glycol has been studied in the time domain with ∼50 femtosecond resolution using the equal-pulse correlation technique. The observed recovery law is consistent with a single exponental decay with time constant t21=0.93+/−0.05 ps for malachite green in water and t21=4.46+/−0.05 ps for malachite green in ethylene glycol.
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Erskine et al. (1984) studied this question.
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