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Hydrogen Bond Interactions in Liquid and Supercritical Hydrofluorocarbons

By A. P. Abbott, S. Corr, N. E. Durling and E. G. Hope


Determination of solvent−solute interactions is key to the understanding of solvent properties in liquid and supercritical fluids. The Kamlet−Taft parameters were determined for difluoromethane (HFC 32) and 1,1,1,2-tetrafluoroethane (HFC 134a) as a function of temperature and pressure in the range 40−130 °C and 50−220 bar using three solvatochromic dyes. It is shown that both solvents exhibit considerable hydrogen bond donating and accepting properties, and these parameters also obey the three region density model often invoked when describing the dipolarity/ polarizability parameter in supercritical fluids

Year: 2003
DOI identifier: 10.1021/jp034763v
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