PY SCALE IN VAPOR-PHASE AND IN SUPERCRITICAL CARBON-DIOXIDE - EVIDENCE IN SUPPORT OF A 3-DENSITY-REGION MODEL FOR SOLVATION IN SUPERCRITICAL FLUIDS

被引：39

作者：

SUN, YP

BUNKER, CE

HAMILTON, NB

机构：

[1] Department of Chemistry, Howard L. Hunter Chemistry Laboratory, Clemson University, Clemson

来源：

CHEMICAL PHYSICS LETTERS | 1993年 / 210卷 / 1-3期

关键词：

D O I：

10.1016/0009-2614(93)89109-U

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

With a fluorescence study of pyrene, Py (I1/I3) values are determined in the vapor phase at 70-degrees-C and in supercritical CO2 at 45-degrees-C over a wide density range (rho(r) 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 CO2 densities, which strongly supports a three-density-region solvation model for solvent effects in supercritical fluids.

引用

页码：111 / 117

页数：7

共 64 条

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