Artículo

La versión final de este artículo es de uso interno de la institución.
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

The solubilities of crystalline NaI, KI and CsI in supercritical ammonia (SCA) were determined for temperatures around 420 K and different ammonia densities smaller than the critical density using the spectral charge-transfer-to-solvent (ctts) band of iodides. The optical absorptivity of the ctts band was also determined with the potassium salt and shown to be density independent. The results show that the solubility of the alkali metal iodides exhibit a very simple dependence on fluid density; this implies that over the density range we have explored, the first solvation shell of the ion pairs is mostly complete even at the lowest studied density. © 2005 Elsevier B.V. All rights reserved.

Registro:

Documento: Artículo
Título:Solubility of crystalline alkali metal iodides in supercritical ammonia
Autor:Sciaini, G.; Marceca, E.; Fernández-Prini, R.
Filiación:INQUIMAE/DQIAQF, Facultad de Ciencias Exactas y Naturales, Pabellón II, Buenos Aires 1428, Argentina
Unidad Actividad Química, Comisión Nacional de Energía Atómica, Av. Libertador 8250, Buenos Aires 1429, Argentina
Palabras clave:Alkali metal iodide; Charge-transfer-to-solvent; Solubility; Solvation; Supercritical ammonia; Ammonia; Charge transfer; Light absorption; Precipitation (chemical); Solubility; Solutions; Ultraviolet radiation; Alkali metal iodide; Charge-transfer-to-solvent; Solvation; Supercritical ammonia; Alkali metals
Año:2005
Volumen:35
Número:2
Página de inicio:106
Página de fin:110
DOI: http://dx.doi.org/10.1016/j.supflu.2004.12.013
Título revista:Journal of Supercritical Fluids
Título revista abreviado:J. Supercritical Fluids
ISSN:08968446
CODEN:JSFLE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08968446_v35_n2_p106_Sciaini

Referencias:

  • Pearson, G.S., Magee, R.S., Critical evaluation of proven chemical weapon destruction technologies (2002) Pure Appl. Chem., 74, p. 187
  • Frischkorn, C., Zanni, M.T., Davis, A.V., Neumark, D.M., Electron solvation dynamics of I-(NH3)n clusters (2000) Faraday Disc., 115, p. 49
  • Brandt, F.S., Broers, P.M.A., De Loos, T.W., High pressure phase equilibria in the system ammonia + potassium iodide, +sodium iodide, +sodium bromide, and +sodium thiocyanate: Solid-liquid-vapor and liquid-liquid-vapor equilibria (2001) Int. J. Thermophys., 22, p. 1045
  • Shapira, D., Treiner, A., Charge-transfer-to-solvent spectra in liquid ammonia (1966) J. Phys. Chem., 70, p. 305
  • Tillner-Roth, R., Harns-Watzenberg, F., Bähr, H.D., Eine neue Fundamentalgleichung für Ammoniak (1993) Proceedings of the 20th DKV-Tagung, Vol. II, p. 167. , Heidelberg, Germany
  • Fernández, D.P., Hefter, G., Fernández-Prini, R., The solubility of solids in near-critical fluids. VI. CHI3 in CO2 revisited (2001) J. Chem. Thermodyn., 33, p. 1309
  • Alvarez, J.L., Fernández-Prini, R., Japas, M.L., Aqueous nonionic solutes at infinite dilution: Thermodynamic description, including the near-critical region (2000) Ind. Eng. Chem. Res., 39, p. 3625
  • McBride, J.O.P., Nicholls, R.W., The vibration-rotation spectrum of ammonia gas I (1972) J. Phys. B, 5, p. 408
  • Fernández-Prini, R., Study of local density enhancement in near-critical solutions of attractive solutes using hydrostatic hypernetted chain theory (2002) J. Phys. Chem. B, 106, p. 3217
  • Sciaini, G., Marceca, E., Fernández-Prini, R., Intermolecular solvent-solute energies for thermodynamic and spectroscopic properties of solutes in near-critical solvents (2002) Phys. Chem. Chem. Phys., 4, p. 3400
  • Cogin, G.E., Kimball, G.E., The vapor pressure of some alkali halides (1948) J. Chem. Phys., 16, p. 1035
  • Chase, M.W., NIST-JANAF thermochemical tables (1998) J. Phys. Chem. Ref. Data, , Monograph No. 9, ACS-AIP-NIST
  • Hnizda, V.F., Kraus, C.A., Properties of electrolytic solutions. XXXIX. Conductance of several salts in ammonia at -34° by a precision method (1949) J. Am. Chem. Soc., 71, p. 1565
  • Bubak, M., Harder, W.D., The static dielectric constant of ammonia to high pressures and temperatures. II. Representation of expeirmental data via Kirkwood- Fröhlich's equation (1977) Ber. Bunsenges. Phys. Chem., 81, p. 609
  • Blandamer, M.J., Fox, M.F., Theory and application of charge transfer to solvent spectra (1970) Chem. Rev., 70, p. 59
  • Evans, D.H., Keese, R.G., Castleman, A.W., The association of ammonia with halide ions in the gas phase (1987) J. Chem. Phys., 86, p. 2927
  • Tongraar, A., Hannongbua, S., Rode, B.M., Molecular dynamics simulations of potassium ion and an iodide ion in liquid ammonia (1997) Chem. Phys., 219, p. 279
  • Peslherbe, G.H., Ladany, B.M., Hynes, J.T., Structure of NaI ion pair in water clusters (2000) Chem. Phys., 258, p. 201

Citas:

---------- APA ----------
Sciaini, G., Marceca, E. & Fernández-Prini, R. (2005) . Solubility of crystalline alkali metal iodides in supercritical ammonia. Journal of Supercritical Fluids, 35(2), 106-110.
http://dx.doi.org/10.1016/j.supflu.2004.12.013
---------- CHICAGO ----------
Sciaini, G., Marceca, E., Fernández-Prini, R. "Solubility of crystalline alkali metal iodides in supercritical ammonia" . Journal of Supercritical Fluids 35, no. 2 (2005) : 106-110.
http://dx.doi.org/10.1016/j.supflu.2004.12.013
---------- MLA ----------
Sciaini, G., Marceca, E., Fernández-Prini, R. "Solubility of crystalline alkali metal iodides in supercritical ammonia" . Journal of Supercritical Fluids, vol. 35, no. 2, 2005, pp. 106-110.
http://dx.doi.org/10.1016/j.supflu.2004.12.013
---------- VANCOUVER ----------
Sciaini, G., Marceca, E., Fernández-Prini, R. Solubility of crystalline alkali metal iodides in supercritical ammonia. J. Supercritical Fluids. 2005;35(2):106-110.
http://dx.doi.org/10.1016/j.supflu.2004.12.013