Search for the possibility of utilizing the differences in complex-forming capacities of alkylimidazoles for selective extraction of some metal ions from aqueous solutions

• Authors: Elżbieta Radzymińska-Lenarcik
• Languages of publication: EN

Abstracts

EN

Alkyl substituents in position 1 of the imidazole ring distinctly affect the hydrophobic properties of the molecule and strengthen its basicity. Hence, 1-alkylimidazoles have been used as extractants of a number of metal ions. Again, a methyl substituent in position 2 of the imidazole ring raises by an order of magnitude the basicity. At the same time, the substituent impedes the formation of the 2-alkylimidazole complexes with metal ions due to the steric effect.By the substitution of alkyl groups in position 1 or 2 of the imidazole ring it is possible to program the extraction properties of extractants and to control the selectivity of extraction.

Keywords

EN

selective extraction; alkyl imidazole derivatives; transition metals ions

• Publisher: De Gruyter Open
• Journal: Polish Journal of Chemical Technology
• Year: 2008
• Volume: 10
• Issue: 1
• Pages: 73-78

Dates

published

1 - 1 - 2008

online

3 - 4 - 2008

Contributors

author

Elżbieta Radzymińska-Lenarcik

• Department of Inorganic Chemistry, University of Technology and Life Sciences, Seminaryjna 3, 85-326 Bydgoszcz, Poland

References

• Sundberg, R. J. & Martin B. R. (1974). Interaction of Histidine and other Imidazole Derivatives with Transition Metal Ions in Chemical and Biological System. Chem. Rev. 74, 471-517. DOI: 10.1021/cr60290a003.[Crossref]
• Martel, A. E. & Smith R. M. (1982). Critical Stability Constants, Plenum Press, New York.
• Lenarcik, B. & Ojczenasz P. (2002). The Infuence of the Size and Position of the Alkyl Groups in Alkylimidazole Molecules on Their Acid - Base Properties. J. Heterocyc. Chem. 39, 287 - 290. DOI: 10.1080/07366290601067572.[Crossref]
• Cupery, M. E. (1974). N-Imidazole Compounds and Their Complex Metal Derivatives. US Patent, 3843667, October 22.
• Schakers, J. M. & du Preez J. G.H. (2004) Solvent Extraction Mixture Comprising Substituted Imidazole or Benzimidazole for the Purification of Groups of Base Metals. US Patent, US 20040208808 A1, October 21.
• Lenarcik, B. & Barszcz B. (1977). Stability and Structure of Transition Metal Complexes with Azoles in Aqueous Solutions. Part XIV. Complex Formation Between N-Methylimidazole and Co(II), Ni(II), Cu(II) and Zn(II). Roczniki Chem. 51, 1849 1855.
• Lenarcik, B. & Barszcz B. (1979). Stability and Structure of Transition Metal Complexes with Azoles in Aqueous Solutions. Part XIX. Structural Effects During Complexation of Co(II), Ni(II), Cu(II) and Zn(II) with 1-Ethyl- and 1-Propylimidazoles. Polish J. Chem. 53, 963 - 971.
• Lenarcik, B., Barszcz B. & Kulig J. (1977). Stability and Structure of Transition Metal Complexes with Azoles in Aqueous Solutions. Part XI. A Study on Complex Formation Between N-Butylimidazole and Co(II), Ni(II), Cu(II) and Zn(II). Roczniki Chem. 51, 1315 - 1322.
• du Preez, J. G.H., Sumter N., Matteűs Ch., Ravindran S. & van Brecht B. J. (1997). Nitogen Reagents in Metal Ion Separation. Part VII. The Development of a Novel Copper(II) Extractant. Sol. Extr. Ion Exch. 15, 1007 - 1021. DOI: 10.1080/07366299708934518.[Crossref]
• Lenarcik, B. & Ojczenasz, P. (2004). Investigation of the Stability Constants of Co(II) Complexes with a Homologous Series of 1-Alkylimidazoles in Aqueous Solution by Using a Partition Method with Several Solvents. Sep. Sci. Technol. 39, 199 - 226. DOI: 10.1081/SS-120027409.[Crossref]
• Lenarcik, B. & Kierzkowska, A. (2004). The Influence of Alkyl Length on Stability Constants of Zn(II) Complexes with 1-Alkylimidazoles in Aqueous Solutions and Their Partition Between Aqueous Phase and Organic Solvent. Sol. Extr. Ion Exch. 22, 449 - 471. DOI: 10.1081/SEI-120030398.[Crossref]
• Lenarcik, B. & Rauckyte, T. (2004). The Influence of Alkyl Length on Extraction Equilibria of Ni(II) Complexes with 1-Alkylimidazoles in Aqueous Solution/Organic Solvent Systems. Sep. Sci. Technol. 39, 3353 - 3372. DOI: 10.1081/SS-200028915.[Crossref]
• Radzyminska-Lenarcik E. (2007). The Influence of the Alkyl Chain Length on the Extraction Equilibrium of Cu(II) Complexes with 1-Alkylimidazoles in Aqueous Solution -Organic Solvent Systems. Solv. Ext. Ion Exch. 25, 53 - 64. DOI: 10.1080/07366290601067572.[Crossref]
• Rydberg, J., Musakis C. K. & Chopin, G. R. (1992). Principles and Practices of Solvent Extraction. M. Dekker Inc.
• Rossotti, F. J.C. & Rossotti, H. (1961). The Determination of Stability Constants. McGraw-Hill, New York
• Lenarcik, B. & Kurdziel, K. (1981). Stability and Structure of Transition Metal Complexes of Azoles in Aqueous Solutions. Part XXIII. Effect of the Position of Methyl Substituents on the Complex-Forming Capacity of Imidazoles. Polish J. Chem. 55, 737 - 745.
• Lenarcik, B. & Kurdziel, K. (1982). Stability and Structure of Transition Metal Complexes of Azoles in Aqueous Solutions. Part XXV. The Effect of the Size and Position of an Alkyl Substituent on the Stability and Structure of Alkylimidazole Complexes. Polish J. Chem. 56, 3 - 14.
• Lenarcik, B., Kurdziel K. & Czopek, R. (1991). Stability and Structure of Transition Metal Complexes with Azoles in Aqueous Solutions. Part XXIX. The Influence of the Size and Structure of the Alkyl Group on the Formation of 2-Alkylimidazole Complexes. Polish J. Chem. 65, 1235 - 1241.
• Lenarcik, B., Kulig J. & Laidler, P. (1974). Stability and Structure of Transition Metal Complexes with Azoles in Aqueous Solutions. Part II. 2-Methylimidazole Complexes of Co(II), Cu(II) and Zn(II). Roczniki Chemii 48, 1151 - 1158.
• Lenarcik, B. & Barszcz, B. (1980). Stability and Structure of Transition Metal Complexes with Azoles in Aqueous Solutions. Part XXI. A Comparison of Complex-Forming of 1,2-Dimethylimidazole with that of Other 1,3-Diazoles. J. Chem. Soc. Dalton Trans. 24 - 28. DOI: 10.1039/DT9800000024.[Crossref]
• Lenarcik, B., Adach A. & Radzyminska-Lenarcik, E. (1999). The Influence of Steric Effect and Alkyl Chain Length on the Extraction of the Complexes of Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) with 1-Alkyl-2-methylimidazoles. Polish J. Chem. 73, 1273 - 1281.
• Radzyminska-Lenarcik, E. (2007). Effect of Alkyl Chain Length on the Extraction of Copper(II) Complexes with 1-Alkyl-2-methylimidazoles. Sep. Sci. Technol. 42, 2661 - 2676. DOI: 10.1080/01496390701515003.[WoS][Crossref]
• Lenarcik, B. & Kierzkowska, A. (2006). The Influence of Alkyl Chain Length and Steric Effect on Extraction of Zinc(II) Complexes with 1-Alkyl-2-methylimidazoles. Sol. Extr. Ion Exch. 24, 433 - 445. DOI: 10.1080/07366290600646962.[Crossref]

Identifiers

DOI

10.2478/v10026-008-0017-3