title: Spectroscopic studies of the mechanism of reversible photodegradation of 1-substituted aminoanthraquinone-doped polymers.
abstract: The mechanism of reversible photodegradation of 1-substituted aminoanthraquinones doped into poly(methyl methacrylate) and polystyrene is investigated. Time-dependent density functional theory is employed to predict the transition energies and corresponding oscillator strengths of the proposed reversibly and irreversibly damaged dye species. Ultraviolet-visible and Fourier transform infrared (FTIR) spectroscopy are used to characterize which species are present. FTIR spectroscopy indicates that both dye and polymer undergo reversible photodegradation when irradiated with a visible laser. These findings suggest that photodegradation of 1-substituted aminoanthraquinones doped in polymers originates from interactions between dyes and photoinduced thermally degraded polymers, and the metastable product may recover or further degrade irreversibly.
authors.affiliation: Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164-2814, USA.
authors.forename: Sheng-Ting
authors.initials: ST
authors.lastname: Hung
authors.affiliation: Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164-2814, USA.
authors.forename: Ankita
authors.initials: A
authors.lastname: Bhuyan
authors.affiliation: Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164-2814, USA.
authors.forename: Kyle
authors.initials: K
authors.lastname: Schademan
authors.affiliation: Department of Chemistry, University of Leuven, Leuven B-3001, Belgium.
authors.forename: Joost
authors.initials: J
authors.lastname: Steverlynck
authors.affiliation: Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164-2814, USA.
authors.forename: Matthew D
authors.initials: MD
authors.lastname: McCluskey
authors.affiliation: Department of Chemistry, University of Leuven, Leuven B-3001, Belgium.
authors.forename: Guy
authors.initials: G
authors.lastname: Koeckelberghs
authors.affiliation: Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164-2814, USA.
authors.forename: Koen
authors.initials: K
authors.lastname: Clays
authors.affiliation: Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164-2814, USA.
authors.forename: Mark G
authors.initials: MG
authors.lastname: Kuzyk