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Energy transfer and photodegradation of a Perylene Orange:LDS821 system in poly(methyl methacrylate)

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Abstract

The luminescence of Perylene Orange and LDS821 in poly(methyl methacrylate) (PMMA) following a 532  nm irradiation yielded information on photodegradation and energy transfer. The irradiation of the Perylene Orange∕LDS821∕PMMA films resulted in (i) a maximum in the Perylene Orange fluorescence photodegradation profile and (ii) an enhancement of the LDS821 fluorescence relative to the LDS821∕PMMA films. These results are attributed to an energy transfer from the Perylene Orange to the LDS821 with an energy transfer rate constant of 5.19±0 .75 (2σ)×1011M1s1 and a Förster critical radius of 65.7  Å. Fluorescence half-quenching and time-resolved fluorescence measurements attributed energy transfer to the Förster energy transfer with minor contributions of radiative energy transfer.

© 2006 Optical Society of America

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