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Conductance studies on complex formation between c-Methylcalix[4]resorcinarene and titanium (III) in acetonitrile-H2O binary solutions


Rezayi, Majid and Alias, Yatimah and M. Abdi, Mahnaz and Saeedfar, Kasra and Saadati, Naghmeh (2013) Conductance studies on complex formation between c-Methylcalix[4]resorcinarene and titanium (III) in acetonitrile-H2O binary solutions. Molecules, 18 (10). pp. 12041-12050. ISSN 1431-5157; ESSN: 1420-3049


Calixresorcinarenes have proved to be unique molecules for molecular recognition via hydrogen bonding, hydrophobic and ionic interactions with suitable substrates such as cations. The study of the interactions involved in the complexation of different cations with calixresorcinarenes in solvent mixtures is important for a better understanding of the mechanism of biological transport, molecular recognition, and other analytical applications. This article summarizes different aspects of the complexes of the Ti3+ metal cation with c-methylcalix[4]resorcinarene (CMCR) as studied by conductometry in acetonitrile (AN)–water (H2O) binary mixtures at different temperatures. Conductance data show that the metal cation/ligand (ML) stoichiometry of the complexes in solution is 1:1 in all cases. Non-linear behaviour was observed for the variation of logKf of the complexes vs. the composition of the binary solvent mixtures. Selectivity of CMCR for the Ti3+ cation is sensitive to solvent composition; in some cases and at certain compositions of the mixed solvent systems, the selectivity order is changed. Values of thermodynamic parameters (,) for formation of the CMCR–Ti3+ complexes in AN–H2O binary systems were obtained from the temperature dependence of stability constants, and the results show that the thermodynamics of complexation reactions are affected by the nature and composition of the mixed solvents.

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Official URL or Download Paper: http://www.mdpi.com/1420-3049/18/10/12041

Additional Metadata

Item Type: Article
Divisions: Faculty of Science
DOI Number: https://doi.org/10.3390/molecules181012041
Publisher: MDPI
Keywords: Conductance data; Calixresorcinarenes; Titanium(III); c-methylcalix[4]- resorcinarene; Acetonitrile (AN)-water (H2O); Binary mixtures
Depositing User: Umikalthom Abdullah
Date Deposited: 13 Aug 2015 06:39
Last Modified: 29 Oct 2015 08:48
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.3390/molecules181012041
URI: http://psasir.upm.edu.my/id/eprint/30888
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