The nonphotochemical hole burning of ionic dye molecules in poly(vinyl alcohol) and poly(acrylic acid) polymers is shown to be efficient. Hole-burned spectra exhibit extensive intramolecular vibronic satellite structure which yields accurate Si vibrational frequencies. Data are presented which demonstrate that hole filling produced by a secondary burn at a frequency substantially removed from the primary burn frequency is highly selective. The class of ionic dyes in hydrogen-bonded polymers shows promise for detailed studies targeted at a better understanding of disorder and its associated relaxation processes in polymers.
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