Abstract
The complexation reaction of macrocyclic ligand (4′-nitrobenzo-15C5) with Y3+ cation was studied in acetonitrile-methanol (AN-MeOH), acetonitrile-ethanol (AN-EtOH), acetonitrile-dimethylformamide (AN-DMF) and ethylacetate-methanol (EtOAc-MeOH) binary mixtures at different temperatures using conductometry method. The conductivity data show that in all solvent systems, the stoichiometry of the complex formed between 4′-nitrobenzo-15C5 and Y3+ cation is 1: 1 (ML). The stability order of (4′-nitrobenzo-15C5). Y3+ complex in pure non-aqueous solvents at 25°C was found to be: EtOAc > EtOH > AN ≈ DMF > MeOH, and in the case of most compositions of the binary mixed solvents at 25°C it was: AN≈MeOH ≈ AN-EtOH > AN-DMF > EtOAc-MeOH. But the results indicate that the sequence of the stability of the complex in the binary mixed solutions changes with temperature. A non-linear behavior was observed for changes of logK f of (4′-nitrobenzo-15C5 · Y3+) complex versus the composition of the binary mixed solvents, which was explained in terms of solvent-solvent interactions and also the hetero-selective solvation of the species involved in the complexation reaction. The values of thermodynamic parameters (ΔH ℴc and ΔS ℴc ) for formation of the complex were obtained from temperature dependent of the stability constant using the van′t Hoff plots. The results represent that in most cases, the complex is both enthalpy and entropy stabilized and the values and also the sign of thermodynamic parameters are influenced by the nature and composition of the mixed solvents.
Similar content being viewed by others
References
C. J. Pedersen, J. Am. Chem. Soc. 89, 2495 (1967).
G. Ekmekci, D. Uzun, G. Somer, and S. Kalayci, J. Memb. Sci. 288, 36 (2007).
S. Chandra, R. Buschbeck, and H. Lang, Talanta 70, 1087 (2006).
S. Chandra and H. Lang, Sens. Actuators, Ser. B 114, 849 (2006).
V. K. Gupta, M. Al. Khayat, A. K. Minocha, and P. Kumar, Anal. Chim. Acta. 532, 153 (2005).
S. Kim, H. Kim, K. H. Noh, et al., Talanta 61, 709 (2003).
N. Rawat, P. K. Mohapatra, D. S. Lakshmi, et al., J. Memb. Sci. 275, 82 (2006).
N. Malcik, N. Tunoglu, P. Caglar, and G. E. Wnek, Sens. Actuators, Ser. B 53, 204 (1998).
S. Seyhan and Y. Tu, Tetrahedron 17, 1700 (2006).
B. Saad, C. C. Chong, A. S. M. Ali, et al., Anal. Chim. Acta. 555, 146 (2006).
H. Heitzman, B. A. Young, D. J. Rausch, et al., Talanta 69, 527 (2006).
K. Nakamura, S. Nishiyama, S. Tsuruya, and M. Masai, J. Mol. Catal. 93, 195 (1994).
G. H. Rounaghi, N. Khazaee, and R. K. Sanavi, J. Inclusion Phenom. Macrocyclic Chem. 79, 1143 (2005).
G. H. Rounaghi, R. K. Sanavi, and M. Arbab Zavvar, J. Inclusion Phenom. Macrocyclic Chem. 54, 247(2006).
H. J. Schneider and A.Yatsimirsky (John Wiley & Sons Inc., Chichester, 2000).
Y. Takeda, K. Katsuta, Y. Inoue, and T. Hakushi, Bull. Chem. Soc. Jpn. 61, 627 (1988).
H. J. Buschmann, R. C. Mutihac, and E. Schollmeyer, Thermochim. Acta 472, 17 (2008).
M. J. Oshaghani, M. B. Gholiv, and F. Ahmadi, Spectrochim. Acta, Part A 70, 1073 (2008).
M. Rahimi Nasrabadi, F. Ahmadi, S. M. Pourmortazavi, et al., J. Mol. Liquids 144, 97 (2009).
J. M. Barthel, H. Krienke, and W. Kunze (Springer, Darmstadt/Steinkopff/New York, 1988), Vol. 5, p. 128.
Genplot, A Data Analysis and Graphical Plotting Program for Scientist and Engineers (Computer Graphic Service, Ltd., Ithaca, New York, USA, 1989).
G. H. Rounaghi, Z. Eshaghi, and E. Ghiamati, Talanta 44, 275 (1997).
P. D. J. Grootenhuis and P.A. Kollman, J. Am. Chem. Soc. 111, 4046 (1989).
P. A. Mosier-Boss, Spectrochimica Acta, Part A 61, 527 (2005).
Author information
Authors and Affiliations
Corresponding author
Additional information
The article is published in the original.
Rights and permissions
About this article
Cite this article
Habibi, N., Rounaghi, G.H. & Mohajeri, M. Study of complexation process between 4′-nitrobenzo-15-crown-5 and yttrium(III) cation in binary mixed non-aqueous solvents using conductometric method. Russ. J. Phys. Chem. 86, 2018–2023 (2012). https://doi.org/10.1134/S0036024412130109
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0036024412130109