Fluorescence quenching of rhodamine 6G in methanol at high concentration

Abstract The fluorescence lifetime of rhodamine 6G dissolved in methanol is measured over a wide concentration region from 10 −5 to 0.6 mol/l. The rapid reduction of fluorescence lifetime above 10 −2 mol/l is found to be mainly due to energy transfer to quenching centers. The decrease of the fluorescence lifetime is limited by the finite fluorescence lifetime of the quenching centers of ≈ 1 ps.

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