Profesores

Fernández Prini, Roberto
Emeritus Professor UBA

CONICET: Investigador Superior INQUIMAE Departamento de Química Inorgánica, Analítica, y Química Física Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires Tel.: 54-11- 4576-3378/80 ext. 114 Fax: 54-11- 4576-3341 Licenciatura in Chemistry University of Buenos Aires, 1960 PhD. in Chemistry University of Buenos Aires, 1964 Postdoc Reading University (UK), 1963-1965 -e-mail: rfprini@qi.fcen.uba.ar -Fields of Interest: Intermolecular interactions Thermodynamics of Solutions Supercritical solvents Solvation

Experimental and theoretical research activities are centred around the relation between molecular interactions and macroscopic as well as spectroscopy propeties of solutions. The most recent studies involve the use of supercritical solvents and different types of solutes. The solvents employed are the typical nonpolar or slightly polar fluids used in supercritical extraction, but also solvents with much stronger intermolecular interactions have been studied, namely ammonia and water.  We have been able to demonstrate the vital role of the first neighbours to ion pairs in supercritical ammonia in determining the thermodynamic and spectroscopic properties of KI as a probe solute.  Work is being extended to supercritical water, but in this case research is done only employing molecular simulation techniques and electronic structure calculations.  The difference between the two hydorgen-bonded supercritical solvents was found to be remarkable.

We are starting the study of alkali metals in supercritical ammonia to analyze the effect of solvation employing spectrophotometry in the near UV part of the spectrum.

Selected Publications:

J.L. Alvarez y R. Fernández-Prini, J. Solution Chemistry, A  Model-guided

Determination  of  DdisG¥2 for Slightly Soluble Gases in Water using Solubility Data: from the  solvent’s freezing point to its critical point, J. Solution Chemistry, XXX.

G. Sciaini, E. Marceca y R. Fernández Prini, Developlement of the Charge-Transfer-to-Solvent Process with Increasing Solvent Fluid Density: the effect of ion pairing, Phys.Chem. Chem. Phys., invited article, 8, 48 39-4848 (2006).

G.Sciaini, E. Marceca y R. Fernández Prini, The Influence of Ion-pairing in the Spectral Behavior of KI dissolved in supercritical NH3: from vapor phase to condensed liquid, J. Phys. Chem. B, 109, 18949-18945 (2005).

R. Fernández-Prini, J. Alvarez y A. Harvey, Henry’s Constants and Vapor-Liquid Distribution Constants for Gaseous Solutes in H2O and D2O at High Temperatures, J. Phys. Chem. Ref. Data, 32, 903-916 (2003).

R. Fernández Prini. Study of Local Density Enhancement in Near-critical Solutions of Attractive Solutes using Hydrostatic Hypernetted Chain Theory, J. Phys. Chem. B, 106, 3217-3225 (2002).

L. Bronstein, D.P. Fernández y R. Fernández Prini, Near –criticality in Dilute Binary Mixtures: Distribution of azulene between coexisting liquid and vapor carbon dioxide, J. Chem. Phys., 117, 220-225 (2002).