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Abstract:

As a basis for the description of dehydration mechanisms, the molecular structures of two copper(II) dipicolinates, Cu(dipic).2H2O (triclinic) and Cu(dipic).3H2O, are presented and compared with those of other copper(II) dipicolinates. The kinetics of the isothermal dehydration of the monoclinic and triclinic polymorphs of Cu(dipic).2H2O were measured. The monoclinic variety dehydrates in a two-step process; a linear α/t relationship is found for the first step and a two-dimensional diffusion-controlled reaction (D2) law ((1 - α) 1n(1 - α) + α = kt) for the second. Triclinic Cu(dipic).2H2O dehydrates in a one-step process, The relation between a and time is linear at lower temperatures but gradually changes to an Avrami-Erofe'ev (A2) model (-1n(1 - α)1/n = kt) at higher temperatures. A qualitative model based on optical microscopic observations, structural determinations and thermogravimetric data is proposed. The general relationship between dehydration behavior and structure in this series of compounds is discussed. © 1997 Elsevier Science Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:Kinetic study of the thermal dehydration of copper(II) dipicolinates: Crystal and molecular structure of Cu(II) (pyridine 2,6-dicarboxylato) DI- and trihydrated
Autor:Sileo, E.E.; Rigotti, G.; Rivero, B.E.; Blesa, M.A.
Filiación:INQUIMAE, Depto. de Quim. Inorgánica, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Laboratorio de Cristalografía, Departamento de Física, Universidad Nacional de La Plata, 47 y 115, 1900 La Plata, Argentina
Unidad de Actividad Química, Comn. Nac. de Ener. Atómica, Avenida del Libertador 8250, 1429 Buenos Aires, Argentina
Palabras clave:A. organometallic compounds; C. thermogravimetric analysis (TGA); C. X-ray diffraction; D. crystal structure; Copper compounds; Crystal structure; Dehydration; Diffusion in solids; Mathematical models; Molecular structure; Optical microscopy; Reaction kinetics; Thermal effects; Thermogravimetric analysis; X ray crystallography; Avrami Erofe'ev model; Organometallics
Año:1997
Volumen:58
Número:7
Página de inicio:1127
Página de fin:1135
DOI: http://dx.doi.org/10.1016/S0022-3697(96)00237-5
Título revista:Journal of Physics and Chemistry of Solids
Título revista abreviado:J Phys Chem Solids
ISSN:00223697
CODEN:JPCSA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00223697_v58_n7_p1127_Sileo

Referencias:

  • Biagini Cingi, M., Chiesi Villa, A., Guastini, C., Nardelli, M., (1971) Gazz. Chim. Ital., 101, p. 825
  • Sarchet, C., (1972) Etude Structurale de Chelate Cristallisés du Cuivre (11) Avec l'Acid Pyridine-2,6 Dicarboxylique. Thèse de 3e Cycle, , Lyon
  • Chastain, R.V., (1966) Diss. Abstr., 124 B, p. 27
  • Sileo, E.E., Rigotti, G., Rivero, B.E., Castellano, E.E., Blesa, M.A., (1996) Polyhedra, 15, p. 4531
  • Biagini Cingi, M., Chiesi Villa, A., Guastini, C., Nardelli, M., (1972) Gazz. Chim. Ital., 102, p. 1026
  • Sarchet, C., Loiseleur, H., (1973) Acta Cryst., B29, p. 1345
  • Sileo, E.E., Quinteros-Rivero, M.F., Rivero, B.E., Rigotti, G., Blesa, M.A., (1994) Solid State Ionics, 73, p. 153
  • Fair, C., (1990) MolEN: Enraf-Nonius Structure System, Version 1.0, , Delft Instruments, The Netherlands
  • Sheldrick, G.M., (1985) SHELXS86 Program for the Solution of Crystal Structures, , University of Goettingen
  • Sheldrick, G.M., (1976) SHELX76 Program for Crystal Structure Determinations, , University of Cambridge
  • Jose, P., Ooi, S., Fernando, Q., (1969) J. Inorg. Nucl. Chem., 31, p. 1971
  • Sileo, E.E., Morando, P., Della Vedova, C., Blesa, M.A., (1989) Thermochim. Acta, 138, p. 233
  • Sileo, E.E., Morando, P., Blesa, M.A., (1989) Thermochim. Acta, 152, p. 299
  • Holt, J.V., Cutler, J.B., Wadsworth, M.E., (1962) J. Am. Ceram. Soc., 45, p. 133
  • Valensi, G., (1936) C.R. Acad. Sci. Ser. C, 202, p. 309
  • Brown, W.E., Dollimore, D., Galwey, A.K., (1980) Comprehensive Chemical Kinetics, 22, p. 92. , ed. C. H. Bamford and C. F. H. Tipper. Elsevier Scientific, Amsterdam
  • Avrami, M., (1939) J. Chem. Phys., 7, p. 1103
  • (1940) J. Chem. Phys., 8, p. 212
  • (1941) J. Chem. Phys., 9, p. 177
  • Erofe'ev, B.V., (1946) C.R. Dokl. Acad. Sci URRS, 52, p. 511

Citas:

---------- APA ----------
Sileo, E.E., Rigotti, G., Rivero, B.E. & Blesa, M.A. (1997) . Kinetic study of the thermal dehydration of copper(II) dipicolinates: Crystal and molecular structure of Cu(II) (pyridine 2,6-dicarboxylato) DI- and trihydrated. Journal of Physics and Chemistry of Solids, 58(7), 1127-1135.
http://dx.doi.org/10.1016/S0022-3697(96)00237-5
---------- CHICAGO ----------
Sileo, E.E., Rigotti, G., Rivero, B.E., Blesa, M.A. "Kinetic study of the thermal dehydration of copper(II) dipicolinates: Crystal and molecular structure of Cu(II) (pyridine 2,6-dicarboxylato) DI- and trihydrated" . Journal of Physics and Chemistry of Solids 58, no. 7 (1997) : 1127-1135.
http://dx.doi.org/10.1016/S0022-3697(96)00237-5
---------- MLA ----------
Sileo, E.E., Rigotti, G., Rivero, B.E., Blesa, M.A. "Kinetic study of the thermal dehydration of copper(II) dipicolinates: Crystal and molecular structure of Cu(II) (pyridine 2,6-dicarboxylato) DI- and trihydrated" . Journal of Physics and Chemistry of Solids, vol. 58, no. 7, 1997, pp. 1127-1135.
http://dx.doi.org/10.1016/S0022-3697(96)00237-5
---------- VANCOUVER ----------
Sileo, E.E., Rigotti, G., Rivero, B.E., Blesa, M.A. Kinetic study of the thermal dehydration of copper(II) dipicolinates: Crystal and molecular structure of Cu(II) (pyridine 2,6-dicarboxylato) DI- and trihydrated. J Phys Chem Solids. 1997;58(7):1127-1135.
http://dx.doi.org/10.1016/S0022-3697(96)00237-5