DOI QR코드

DOI QR Code

Synthesis and Solution Properties of La(III)-N-ethylmorpholine Complex

  • Anwar, Zeinab M. (Department of Chemistry, Faculty of Science, Suez Canal University) ;
  • Sung, Yong-Kiel (Department of Chemistry, College of Science, Dongguk University)
  • 발행 : 2005.04.20

초록

The complex of the composition LaL(N$O_3)_3\;(H_2O)_2$ is prepared by the reaction of La($NO_3)_3{\cdot}6H_2O$ with Nethylmorpholine in aqueous medium. The ligand is involved in the complex as a neutral species where the chelation occurs via the oxygen of the ligand moiety and the nitrate groups as bidentate ligand. The chemical structure of the studied complex is confirmed through IR, XRD, and thermal analysis data. The complexation equilibria of La(III) with N-ethylmopholine is studied in aqueous medium at ionic strength I = 0.1 mol${\cdot}dm^{-3}\;KNO_3$ and at 25, 35 and 45 ${^{\circ}C}$, respectively. The thermodynamic parameters $\Delta$G, $\Delta$H and $\Delta$S values were calculated to prove the association with the complex formation. It is clearly observed that the process is accompanied by absorption of heat, i.e. endothermic process, while the entropy does not change greatly attributed to the release of constant number of water molecules during chelate formation.

키워드

참고문헌

  1. Martin, R. B.; Richardson, F. S. Q. Rev. Biophys. 1979, 12, 181 https://doi.org/10.1017/S0033583500002754
  2. Meares, C. F.; Wensel, T. G. Acc. Chem. Res. 1982, 17, 202 https://doi.org/10.1021/ar00102a001
  3. Bunzli, J. C. G.; Choppin, G. R. Lanthanide Probes in Life, Chemical and Earth Sciences; Bunzli, J. C. G.; Choppin, G. R. Eds.; Elsevier Amsterdam: The Netherland, 1989; p 1
  4. Choppin, G. R. Pure Appl. Chem. 1971, 27, 23 https://doi.org/10.1351/pac197127010023
  5. Moeller, T. The Lanthanides; Pergamon: Oxford, U K., 1973; Vol. 4, pp 1-50
  6. Rammo, J.; Hettich, R.; Roigk, A.; Schneider, H. J. J. Chem. Soc. Chem. Commun. 1996, 105
  7. Strater, N.; Lipscomb, W. N.; Klabundre, T.; Krebs, B. Angew. Chem., Int. Ed. 1996, 35, 2024
  8. Roigk, A.; Hettich, R.; Schneider, H. J. Inorg. Chem. 1998, 37, 751 https://doi.org/10.1021/ic970297a
  9. Good, N. E.; Winget, G. D.; Winter, W.; Cannolly, T. N.; Izawa, S.; Singh, R. M. M. Biochemistry 1996, 5, 467 https://doi.org/10.1021/bi00866a011
  10. Ferguson, W. J.; Braunschweiger, K. I.; Braunschweiger, W. R.; Smith, J. R. Anal. Biochem. 1980, 104, 300 https://doi.org/10.1016/0003-2697(80)90079-2
  11. Anwar, Z. M.; Azab, H. A. J. Chem. Eng. Data 2001, 46, 613 https://doi.org/10.1021/je000187+
  12. Azab, H. A.; Anwar, Z. M. The 35th International Conference on Coordination Chemistry, Heidelberg, Germany, 2002
  13. Abdel-Kader, K.; Abdel-Hamid, S. F.; Anwar, J. M. (submitted for publication)
  14. Schwarzenbach, G. Standardization of Lanthanides with EDTA in Complexometric Titrations; Interscience: New York, USA, 1957; pp 77-82
  15. Bjerrum, N. Z. Anorg. Allg. Chem. 1921, 119, 179 https://doi.org/10.1002/zaac.19211190113
  16. Irving, H.; Rossotti, M. J. Chem. Soc. 1953, 3397 https://doi.org/10.1039/jr9530003397
  17. Destefano, C.; Princi, P.; Rigano, C.; Sammartano, S. Ann. Chim. (Rome) 1987, 77, 643
  18. Arena, G.; Rizzarelli, S.; Sammartano, S.; Rigano, C. Talanta 1979, 26, 1 https://doi.org/10.1016/0039-9140(79)80146-0
  19. Cross, A. D. Introduction to Practical Infrared Spectroscopy; Butterworths Scientific Publications: London, UK, 1960

피인용 문헌

  1. Spectroscopic studies of poly(vinyl alcohol) films filled with a lanthanum/N-ethylmorpholine complex vol.106, pp.2, 2007, https://doi.org/10.1002/app.26756
  2. Thermal, catalytic, antimicrobial, and chelating aspects of phenolic resin and its polychelates with f-block elements vol.110, pp.6, 2008, https://doi.org/10.1002/app.28958