DOI QR코드

DOI QR Code

Kinetic Studies on the Ligand Substitution Reactions of Cyanocobalt(II) Complexes in Micellar Solutions

미셀용액에서 Cyanocobalt(II) 착물의 리간드치환 반응에 대한 속도론적 연구

  • 안범수 (대진대학교 자연과학대학 화학과)
  • Published : 2009.09.30

Abstract

Kinetic studies on the ligand substitution reactions of cyanocomplexes were performed in several micellar solutions. It showed the observed rate constants was found to be independent of the entering ligand concentration at high concentration of cyanopyridine and pyrazinecarboxylate. We could see also that in nonionic and anionic micellar solutions no influence of changes in the surfactant concentration on the observed rate constants was found. Taking into account the hydrophilic nature of the cobalt complex, the cobalt complex molecule was expected to be located in the aqueous phase of the micellar systems, where the reaction would take place. In cationic micellar solutions, a small increase in the observed rate constant was found when the cationic surfactant concentration increased. After reaching a maximum, the rate constant decreased on increasing surfactant concentration and subsequently it reached a plateau, where the observed rate constant was independent of changes in the surfactant concentration.

Keywords

References

  1. A. Rodriguez, M. Graciani, and M. Moya,The surface tensions for tthe salt solutions and aqueous solutions, Langmuir, 12, 4090 (1996) https://doi.org/10.1021/la960208r
  2. S. Tascioglu, Tetrahedron, 52, 11113 (1996) https://doi.org/10.1016/0040-4020(96)00669-2
  3. S. Nakamura, M. Senoh, and N. Iwasa, Single quantum well structure blue and violet emitting diodes, Appl. Phys. Lett., 67, 1868 (1995) https://doi.org/10.1063/1.114359
  4. C. A. Bunton and G. Savelli, A Medium effect from a combination of cage, preorientation, polarity, and charge effects, Adv. Phys. Org. Chem, 22, 213 (1986) https://doi.org/10.1016/S0065-3160(08)60169-0
  5. L. S. Pomstead and C. A. Bunton, Theoretical treatment involving approximation and assumptions of the influence of other factors in micellar pseudophase, J Mol. Fluid, 72, 231 (1997)
  6. G. Brauer, Handbook of preparative inorganic chemistry 2nd ed., p1511, Academic press, NY (1975)
  7. H. E. Toma and J. M. Malin, A Medium effect that influences the reactivity of bimolecular reactions, Inorg. Chem, 12, 2080 (1973) https://doi.org/10.1021/ic50127a026
  8. E. A. Ghariv, M. j. Blandarma, and J. Bugess, Salt effects on ligand substitution reactions, Trans. Met. Chem, 12, 3071 (1989)
  9. A. Alousy, S. Alsheri, and M. Graciani, The influence of the surface tension of the reaction medium, Trans. Met. Chem., 18, 179 (1993) https://doi.org/10.1007/BF00139952
  10. G. Fernandez and M. Moya, The surfactant concentration on the distribution of rhe reagents, Langmuir, 15, 4441 (1999) https://doi.org/10.1021/la981586u
  11. N. J. Buurma, A. M. Herranz, and J. B. Engbert, Solution effects for some ligand substitution reactions, J. Chern. Soc. Perkin 2 113 (1999)
  12. A. B. Samui, A. S. Pantankar, and P. C. Deb, Study of polyaniline containing paint for corrosion prevention, E. Sci., 47, 1 (2003) https://doi.org/10.1016/S0300-9440(02)00117-0
  13. D. C. Jung, Skin prnetration characteristics by oil ointment bases of clofibrate, J Kor. Oil. Cnemist Soc., 24, 117 (2007)
  14. J. Kido and Y. Okamoto, Organolantanide metal complexes for substitution reactions, Chem Rev., 102, 2357 (2002) https://doi.org/10.1021/cr010448y
  15. B. K. Ku and S. W. Jung, Effects of curing conditions on the chemical compositions of positive plate, J. Kor. Oil Chemist Soc., 23, 347 (2006)
  16. F. S. Liang, Y. X. Cheng, and G. P. Su, White luminescence based on a new born complex, Synth Met, 137, 1109 (2003) https://doi.org/10.1016/S0379-6779(02)01101-3
  17. S. Kappaun, S. Elder, and K. Mereiter, Wpled prepared from main chain Fluorine-iridium complex, J. Mater. Chem, 16, 4389 (2006) https://doi.org/10.1039/b611738d
  18. S. Tokito, T. Iijima, and T. Tsuzki, High efficiency phosphorescenct organic emitting devices with blue and red emitting layers, Appl. Phys. Lett., 83, 2459 (2003) https://doi.org/10.1063/1.1611620