Preparation and Thermal Decomposition Kinetics of Copper(II) Complex with 1-(6-Hydroxynaphthalen-2-yl)butane-1,3-dione

Document Type: Research Article

Authors

College of Chemistry and Environmental Engineering, Hubei Normal University, Huangshi 435002, CHINA

Abstract

A complex of Cu(II) with 1-(6-HydroxyNaphthalen-2-yl) Butane-1,3-Dione (HNBD) was synthesized and characterized by elemental analysis, IR, UV and DTA-TG-DTG techniques.    IR spectra as well as UV-visible absorption measurements indicated that Cu(II) ion was coordinated to the HNBD ligand. The TG-DTA-DTG curves showed that thermal decomposition of the anhydrous complex was a two-stage process and the residue of decomposition was CuO. The decomposition mechanism and non-isothermal kinetic parameters of the complex were obtained from the analysis of TG-DTG data using three kinds of integral methods (Coat-Redfern equation, HM equation, MKN equation) and differential method (Achar equation). The results indicate that the kinetic equations with parameters describing the thermal decomposition reaction are  with E = 417.78 kJ/mol, A = 3.53´1038/s, DS = 487.55 J/K·mol and n =3 for the first stage,  with E = 88.76 kJ/mol, A = 4.74´105, DS = -144.59 J/K/mol  and n =2 for the second stage.

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[1] Song H.Z., Jiang Y.Z., Xia C.R., Meng G.Y., Peng D.K., Synthesis and Characterization of Volatile          Metal β-diketonate Chelates of M(DPM)n (M=Ce, Gd, Y, Zr, n=3,4) Used as Precursors for MOCVD, J. Crystal Growth, 250, p. 423 (2003).

[2] Zhou D.J., Huang C.H., Yao G.Q., Bai J., Li T.K., Luminescent Europium-dibenzoylmethane complexes and Their Langmuir-Blodgett Films, J. Alloys Comp., 235, p. 156 (1996).

[3] Mark J. D., Kulbinder K. B., Seiichiro H., Structural Investigations of Copper(II) Complexes Containing Fluorine-Substituted β-diketonate Ligands, J. Fluorine Chem., 123, p. 109 (2003).

[4] Sergej P., Liliane G. H., Adulfas A., Synthesis and Molecular Structures of Cobalt(II) β-diketonate Complexes as New MOCVD Precursors for Cobalt Oxide Films, Polyhedron, 23, p. 735 (2004).

[5] Kazuko M., Yoshie T., Tomonari U., Highly Sensitive Time-resolved Fluorometric Determination of Estrogens by High-performance Liquid Chromatography Using a β-diketonate Europium Chelate, J.Chromatog. B, 773, p. 135 (2002).

[6] Wan W., Guan W.J., Zhao K.Q., Zheng W.Z., Zhang L.F., Rod-Like Organometallic Liquid Crystals with     β-Diketonate Co(II), Ni(II) and Cu(II) Complexes, Hecheng Huaxue, 5, p. 225 (1997). 

[7] Frey S.T., Gong M.L., Horrocks W.D.W., Synergistic Coordination in Ternary Complexes of Eu3+ with Aromatic β-Diketone Ligands and 1,10-Phenanthroline, Inorg. Chem., 33, p. 3229 (1994).

[8] Chen Z., Wu Y., Huang F., Gu D., Gan F., Synthesis, Spectral, and Thermal Characterizations of Ni(II) and Cu(II) β-diketone Complexes with Thenoyltrifluoroacetone Ligand, Spectrochim. Acta Part A, 66, p. 1024 (2007).

[9] Brito H.F., Carvalho C.A.A., Malta O.L., Spectroscopic Study of the Inclusion Compound of β-cyclodextrin and Tris(dibenzoylmethane) Europium(III) Dihydrate, Spectrochim. Acta Part A, 55, p. 2403 (1999).

[10] Jiang Y.Z., Song H.Z., Li L., Synthesis and Characterization of Sm(DPM)3 Used as Precursor for MOCVD, J. Crystal. Growth, 267, p. 256 (2004).

[11] Morais C.R.S., Souza A.G., Santa-Cruz P.A., Kinetic Study of the Thermal Decomposition of Eu3+ with β-diketone Ligands and 1,10-phenanthroline or 2,2-dipyridine, J. Alloys Comp., 344, p. 101 (2002).

[12] Li J.P., Tian B.Y., Ye J., Synthesis and Fluorescence Spectra of Micro-crystal of Rare Earths with Dibenzoylmethane, Natural Science Journal of Hubei University, 20, p. 59 (1998).

[13] Kazuo N., Translated by Huang D.R., Wang R.Q., “Infrared and Raman Spectra of Inorganic and Coordination Compounds (in Chinese)”, Beijing, China: Chemical Industry Press, (1986).

[14] Garg B.S., Kumar D.N., Spectral Studies of Complexes of Nickel(II) with Tetradentate Schiff Bases Having N2O2 Donor Groups, Spectrochim. Acta Part A, 59, 229 (2003).

[15] Hu R. Z., Shi Q. Z., “Thermal Analysis Kinetics (in Chinese)”, Beijing, China: Scientific Press, (2001).

[16] Achar B.N.N., Bridley G.W., Sharp J.H., Kinetics and Mechanism of Dehydroxylation Processes. III. Applications and Limitations of Dynamic Methods, ‘‘Proceeding of International Clay Conference,’’ Jerusalen, 1,  p.67 (1966).

[17] Coats A.W., Redfern J.P., Thermal Studies on some Metal Complexes of Hexamethyl Eniminecarbo- dithioate, Nature, 201, p. 67 (1964).

[18] Liu Z.H., “Handbook of Analytical Chemistry, Thermal Analysis, Part 8, 2nd edition, (in Chinese)”, Beijing, China: Chemical Industry Press, (2000).

[19] Madhusudhanan P. M., Krishnan K., Ninan K. N., New Approximation for the P(x) Function in the Evaluation of Non-isothermal Kinetic Data, Thermochim. Acta, 97, p. 189 (1986).

[20] Horowitz H. H., Metzger G., Analysis of thermogravimetric Traces, Anal. Chem. 35, p. 1465(1963).

[21] Madhu N.T., Radhakrishnan P.K., Grunert M., A Thermal Decomposition Study on Cobalt(II) Complexes of 1,2-di(imino-4′-antipyrinyl)ethane, Thermochim.Acta, 400, p. 29 (2003).