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

  title={Mechanisms of reversible photodegradation in disperse orange 11 dye doped in PMMA polymer.},
  author={Natnael B. Embaye and Shiva K. Ramini and Mark G. Kuzyk},
  journal={The Journal of chemical physics},
  volume={129 5},
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… 
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