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

Abstract

We 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.

arXiv comment10 pages and 13 figures

References in corpus (1)

• Two-photon fluorescence measurements of reversible photodegradation in a dye-doped polymer

Cited by in corpus (13)

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• Random Lasing and Reversible Photodegradation in Disperse Orange 11 Dye-Doped PMMA with Dispersed ZrO${}_2$ Nanoparticles
• Spectroscopic studies of the mechanism of reversible photodegradation of 1-substituted aminoanthraquinone-doped polymers
• Generalizing the correlated chromophore domain model of reversible photodegradation to include the effects of an applied electric field
• The influence of an electric field on photodegradation and self healing in disperse orange 11 dye-doped PMMA thin films
• Testing the diffusion hypothesis as a mechanism of self-healing in Disperse orange 11 doped in PMMA
• The effect of pump depletion on reversible photodegradation
• Wavelength dependence of reversible photodegradation of disperse orange 11 dye-doped PMMA thin films
• Mechanisms of the refractive index change in DO11/PMMA due to photodegradation
• A White Light Interferometric Microscope for Measuring Dose-Dependent Reversible Photodegradation