Spectroscopic studies of the solute-solvent interaction in dye-doped polymers : frequency-dependent pressure shifts

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Reul, Stefan ; Richter, Wolfgang ; Haarer, Dietrich:
Spectroscopic studies of the solute-solvent interaction in dye-doped polymers : frequency-dependent pressure shifts.
In: Chemical Physics Letters. Bd. 180 (1991) Heft 1-2 . - S. 1-5.
ISSN 1873-4448
DOI: https://doi.org/10.1016/0009-2614(91)87106-L

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Abstract

The method of hole burning spectroscopy is an excellent means to investigate small shifts and broadenings of quasi-homogeneous optical lines of dye molecules embedded in an amorphous matrix, caused by slight changes in the microscopic matrix environment after applying hydrostatic pressure. We have investigated the pressure-induced line shifts of free-base phthalocyanine in the polymer matrices polyethylene and polystyrene. The experimental data confirm the theoretical prediction of Laird and Skinner pertaining to the frequency dependence of the pressure-induced shifts and the corresponding broadening effects of spectral holes.