Abstract
Measurements have been made of the effect of pressure on the peak location and peak shape for anthracene in a variety of liquid and plastic environments; both absorption and fluorescence studies were made. The results are discussed from two standpoints: in terms of the dielectric model and of a configuration coordinate model. For the latter model, the change of configuration coordinate (volume decrease of the system upon electronic excitation) is shown to correlate well with the product of the compressibility and polarizability of the solvent. For the dielectric model, it is found that the change of cavity volume with density is complex. However, the relative cavity volume obtained from emission measurements was consistently 10-15% smaller than that obtained from absorption. The cavity volume decreased with increasing polarizability of the solvent, and results obtained from absorption and emission were quite consistent in this regard.
Keywords: electronic excitation, dielectric theory, configuration coordinates
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Selected References
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- Drickamer H. G., Frank C. W., Slichter C. P. Optical versus thermal transitions in solids at high pressure. Proc Natl Acad Sci U S A. 1972 Apr;69(4):933–937. doi: 10.1073/pnas.69.4.933. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Okamoto B. Y., Drotning W. D., Drickamer H. G. The evaluation of configuration coordinate parameters from high pressure absorption and luminescence data. Proc Natl Acad Sci U S A. 1974 Jul;71(7):2671–2674. doi: 10.1073/pnas.71.7.2671. [DOI] [PMC free article] [PubMed] [Google Scholar]