Journal article
Mechanisms of reversible photodegradation in disperse orange 11 dye doped in PMMA polymer
The Journal of chemical physics, Vol.129(5), pp.054504-054504-9
08/04/2008
Handle:
https://hdl.handle.net/2376/104086
PMID: 18698911
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.
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Details
- Title
- Mechanisms of reversible photodegradation in disperse orange 11 dye doped in PMMA polymer
- Creators
- Natnael Embaye - Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164-2814, USAShiva Ramini - Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164-2814, USAMark Kuzyk - Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164-2814, USA
- Publication Details
- The Journal of chemical physics, Vol.129(5), pp.054504-054504-9
- Academic Unit
- Physics and Astronomy, Department of
- Publisher
- American Institute of Physics
- Grant note
- ECCS-0756936 / NSF
- Identifiers
- 99900546819901842
- Resource Type
- Journal article