✦ LIBER ✦
Py scale in vapor phase and in supercritical carbon dioxide. Evidence in support of a three-density-region model for solvation in supercritical fluids
✍ Scribed by Ya-Ping Sun; Christopher E. Bunker; Norwood B. Hamilton
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 592 KB
- Volume
- 210
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
With a fluorescence study of pyrene, Py (1,/I,) values are determined in the vapor phase at 70°C and in supercritical CO* at 45°C over a wide density range (p, from 0.025 to 1.9). Noise-elimination for weak pyrene vapor-phase spectra is accomplished by the application of principal component analysis. A characteristic density dependence of Py scale becomes clear with the determination of Py values at low CO* densities, which strongly supports a threedensity-region solvation model for solvent effects in supercritical fluids.