Study of complex formation between Kryptofix 21 and UO 2 2+ cation in some binary mixed non-aqueous solutions

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• 作者：Maryam Nasiri ; Gholam Hossein Rounaghi
• 关键词：Kryptofix 21 ; UO 2 2+ cation ; mixed non ; aqueous solvents ; conductometry
• 刊名：Russian Journal of Electrochemistry
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：51
• 期：8
• 页码：758-763
• 全文大小：361 KB
• 参考文献：1.Pedersen, C.J., J. Am. Chem. Soc., 1967, vol. 89, p. 2495.View Article
  2.Ekmekci, G., Uzun, D., and Somer, G., J. Memb. Sci., 2007, vol. 288, p. 36.View Article
  3.Chandra, S., Buschbeck, R., and Lang, H., Talanta, 2006, vol. 70, p. 1087.View Article
  4.Chandra, S. and Lang, H., Sens. Actuators, Ser. B, 2006, vol. 114, p. 849.View Article
  5.Gupta, V.K., Khayat, M.Al., and Minocha, A.K., Anal. Chim. Acta, 2005, vol. 532, p. 153.View Article
  6.Kim, S., Kim, H., and Noh, K.H., Talanta, 2003, vol. 61, p. 709.View Article
  7.Rawat, N., Mohapatra, P.K., and Lakshmi, D.S., J. Memb. Sci., 2006, vol. 275, p. 82.View Article
  8.Malcik, N., Tunoglu, N., and Caglar, P., Sens. Actuators, Ser. B, 1998, vol. 53, p. 204.View Article
  9.Seyhan, S. and Tu, Y., Tetrahedron, 2006, vol. 17, p. 1700.View Article
  10.Saad, B., Chong, C.C., and Ali, A.S.M., Anal. Chim. Acta, 2006, vol. 555, p. 146.View Article
  11.Heitzman, H., Young, B.A., and Rausch, D.J., Talanta, 2006, vol. 69, p. 527.View Article
  12.Nakamura, K., Nishiyama, S., and Tsuruya, S., J. Mol. Catal., 1994, vol. 93, p. 195.View Article
  13.Strasser, B.O., Hallenga, K., and Popov, A.I., J. Am. Chem. Soc., 1985, vol. 107, p. 789.View Article
  14.Loyola, V.M., Pizer, R., and Wilkins R.G., J. Am. Chem. Soc., 1977, vol. 99, p. 7185.View Article
  15.Rofouei, M., Ahmadalinezhah, A., and Taghdiri, M., J. Incl. Phenom. Macrocycl. Chem., 2007, vol. 58, p. 377.View Article
  16.Al-Mustafa, J., Hamzah, S., and Marji, D., J. Sol. Chem., 2004, vol. 30, p. 681.View Article
  17.Rounaghi, G.H., Rahimi Bajestani, M., and Ghaemi, A., Asian J. Chem., 2008, vol. 20, p. 299.
  18.Rounaghi, G.H., Soleamani, A., and Sanavi, K.R., J. Incl. Phenom. Macrocycl. Chem., 2007, vol. 58, p. 43.View Article
  19.Rounaghi, G.H. and Gerey, N.G., Asian J. Chem., 2007, vol. 19, p. 929.
  20.Rounaghi, G.H., Masroornia, M., and Ghaemi A., Asian J. Chem., 2007, vol. 19, p. 1679.
  21.Rounaghi, G.H. and Sanavi, R., Pol. J. Chem., 2006, vol. 80, p. 719.
  22.Rounaghi, G.H., Sanavi Khoshnood, R., and Arbab Zavvar, M.H., J. Incl. Phenom. Macrocycl. Chem., 2006, vol. 54, p. 247.View Article
  23.Seller, R.M., Radiat. Phys. Chem., 1983, vol. 21, p. 295.View Article
  24.Rounaghi, G.H., Mohammad Zade Kakhki, R., J. Incl. Phenom. Macrocycl. Chem., 2009, vol. 63, p. 117.View Article
  25.Ansari Fard, M., Rounaghi, G.H., and Chamsaz, M., J. Incl. Phenom. Macrocycl. Chem., 2009, vol. 64, p. 49.View Article
  26.Rounaghi, G.H., Nazari, E., and Ghaemi, A., J. Coord. Chem., 2010, vol. 63, p. 2349.View Article
  27.Ansari Fard, M., Rounaghi, G.H., and Chamsaz, M., Asian J. Chem., 2009, vol. 21, p. 2799.
  28.Genplot Computer Graphic Service, U.S.A., 1989.
  29.Gutmann, V., N.Y.: Plenum press, 1978.
  30.Rounaghi, G.H. and Popov, A.I., Polyhedron, 1986, vol. 5, p. 1935.View Article
  
• 作者单位：Maryam Nasiri (1)
  Gholam Hossein Rounaghi (1)
  
  1. Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Electrochemistry
  Physical Chemistry
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1608-3342

文摘

The complexation reaction between UO 2 2+ cation and the macrocyclic ligand, Kryptofix 21, was studied in acetonitrile-methanol (AN–MeOH) and acetonitrile–ethylacetate (AN–EtOAc) binary solvent solutions at different temperatures using the conductometric method. In most cases, Kryptofix 21 forms a 1: 1 [M: L] complex with the UO 2 2+ cation. But in some of the studied solvent systems, 1: 2 [M: L2] and also 1: 3 [M: L3] complexes are formed in solutions. The results obtained in this study show that the mechanism of the complexation process between the uranyl cation and Kryptofix 21 changes with the nature and composition of the solvent system. In the case of the binary solvent solutions (mol % AN = 50 and 60), the order of stability constant of the complex at all studying temperatures was found to be: AN–EtOAc > AN–MeOH. The values of thermodynamic quantities (ΔS c ° , ΔH c ° ) for the formation of (Kryptofix 21–UO2)2+ complex were obtained from temperature dependence of the stability constant of the complex using the van’t Hoff plots. The results show that the values of these parameters are influenced by the nature and composition of the mixed solvents and is most solvent systems, the 1: 1 complexation reaction between UO 2 2+ and the macrocyclic ligand is athermic.