Mechanisms of reversible photodegradation in disperse orange 11 dye doped in PMMA polymer

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dc.creatorEmbaye, Natnael B.
dc.creatorRamini, Shiva K.
dc.creatorKuzyk, Mark G.
dc.date2008-08-22
dc.date.accessioned2026-07-07T09:58:15Z
dc.date.available2026-07-07T09:58:15Z
dc.descriptionWe use amplified spontaneous emission (ASE) and linear absorption spectroscopy to study the mechanisms of reversible photodegradation of 1-amino-2-methylanthraquinone (disperse orange 11-DO11) in solid poly(methyl methacrylate). Measurements as a function of intensity, concentration, and time suggest that ASE originates in a state (be it a tautomer or a vibronic level) that can form a dimer or some other aggregate upon relaxation, which through fluorescence quenching leads to degradation of the ASE signal. Whatever the degradation route, a high concentration of DO11 is required and the polymer plays a key role in the process of opening a new reversible degradation pathway that is not available at lower concentrations or in liquid solutions. We construct an energy level diagram that describes all measured quantities in the decay and recovery processes and propose a hypothesis of the nature of the associated states.
dc.description10 pages and 13 figures
dc.identifierhttps://arxiv.org/abs/0808.3346
dc.identifierhttp://arxiv.org/abs/0808.3346
dc.identifierNatnael B. Embaye, Shiva K. Ramini, and Mark G. Kuzyk, J. Chem. Phys. 129, 054504 (2008)
dc.identifierdoi:10.1063/1.2963502
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/167652
dc.subjectChemical Physics
dc.subjectOptics
dc.titleMechanisms of reversible photodegradation in disperse orange 11 dye doped in PMMA polymer
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