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Thermodynamic study of the complexation of p-Isopropylcalix[6]arene with Cs+ cation in dimethylsulfoxide-acetonitrile binary media.

The complexation reactions between the macrocyclic ionophore, p-isopropylcalix[6]arene and Cs+ cation were studied in dimethylsulfoxide-acetonitrile (DMSO-AN) binary non-aqueous solvents at different temperatures using a conductometry method. The conductance data show that the stoichiometry of the (...

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Main Authors: Ahmadzadeh, Saeid, Kassim , Anuar, Rezayi, Majid, Rounaghi, Gholam Hossein
Format: Article
Language:English
English
Published: MDPI 2011
Online Access:http://psasir.upm.edu.my/id/eprint/24961/1/Thermodynamic%20study%20of%20the%20complexation%20of%20p.pdf
http://psasir.upm.edu.my/id/eprint/24961/
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spelling my.upm.eprints.249612015-10-21T03:54:16Z http://psasir.upm.edu.my/id/eprint/24961/ Thermodynamic study of the complexation of p-Isopropylcalix[6]arene with Cs+ cation in dimethylsulfoxide-acetonitrile binary media. Ahmadzadeh, Saeid Kassim , Anuar Rezayi, Majid Rounaghi, Gholam Hossein The complexation reactions between the macrocyclic ionophore, p-isopropylcalix[6]arene and Cs+ cation were studied in dimethylsulfoxide-acetonitrile (DMSO-AN) binary non-aqueous solvents at different temperatures using a conductometry method. The conductance data show that the stoichiometry of the (p-isopropylcalix[6]-arene·Cs)+ complex in all binary mixed solvents is 1:1. The stability of the complexes is affected by the composition of the binary solvent media and a non-linear behavior was observed for changes of log K(f) of the complex versus the composition of the binary mixed solvents. The thermodynamic parameters (DH°(c) and DS°(c)) for formation of (p-isopropyl-calix[6]arene·Cs)+ complex were obtained from temperature dependence of the stability constant and the obtained results show that the (p-isopropylcalix[6]arene·Cs)+ complex is enthalpy destabilized, but entropy stabilized, and the values of the mentioned parameters are affected strongly by the nature and composition of the binary mixed solvents. MDPI 2011 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/24961/1/Thermodynamic%20study%20of%20the%20complexation%20of%20p.pdf Ahmadzadeh, Saeid and Kassim , Anuar and Rezayi, Majid and Rounaghi, Gholam Hossein (2011) Thermodynamic study of the complexation of p-Isopropylcalix[6]arene with Cs+ cation in dimethylsulfoxide-acetonitrile binary media. Molecules, 16 (9). pp. 8130-8142. ISSN 1420-3049 http://www.mdpi.com/ 10.3390/molecules16098130 English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
description The complexation reactions between the macrocyclic ionophore, p-isopropylcalix[6]arene and Cs+ cation were studied in dimethylsulfoxide-acetonitrile (DMSO-AN) binary non-aqueous solvents at different temperatures using a conductometry method. The conductance data show that the stoichiometry of the (p-isopropylcalix[6]-arene·Cs)+ complex in all binary mixed solvents is 1:1. The stability of the complexes is affected by the composition of the binary solvent media and a non-linear behavior was observed for changes of log K(f) of the complex versus the composition of the binary mixed solvents. The thermodynamic parameters (DH°(c) and DS°(c)) for formation of (p-isopropyl-calix[6]arene·Cs)+ complex were obtained from temperature dependence of the stability constant and the obtained results show that the (p-isopropylcalix[6]arene·Cs)+ complex is enthalpy destabilized, but entropy stabilized, and the values of the mentioned parameters are affected strongly by the nature and composition of the binary mixed solvents.
format Article
author Ahmadzadeh, Saeid
Kassim , Anuar
Rezayi, Majid
Rounaghi, Gholam Hossein
spellingShingle Ahmadzadeh, Saeid
Kassim , Anuar
Rezayi, Majid
Rounaghi, Gholam Hossein
Thermodynamic study of the complexation of p-Isopropylcalix[6]arene with Cs+ cation in dimethylsulfoxide-acetonitrile binary media.
author_facet Ahmadzadeh, Saeid
Kassim , Anuar
Rezayi, Majid
Rounaghi, Gholam Hossein
author_sort Ahmadzadeh, Saeid
title Thermodynamic study of the complexation of p-Isopropylcalix[6]arene with Cs+ cation in dimethylsulfoxide-acetonitrile binary media.
title_short Thermodynamic study of the complexation of p-Isopropylcalix[6]arene with Cs+ cation in dimethylsulfoxide-acetonitrile binary media.
title_full Thermodynamic study of the complexation of p-Isopropylcalix[6]arene with Cs+ cation in dimethylsulfoxide-acetonitrile binary media.
title_fullStr Thermodynamic study of the complexation of p-Isopropylcalix[6]arene with Cs+ cation in dimethylsulfoxide-acetonitrile binary media.
title_full_unstemmed Thermodynamic study of the complexation of p-Isopropylcalix[6]arene with Cs+ cation in dimethylsulfoxide-acetonitrile binary media.
title_sort thermodynamic study of the complexation of p-isopropylcalix[6]arene with cs+ cation in dimethylsulfoxide-acetonitrile binary media.
publisher MDPI
publishDate 2011
url http://psasir.upm.edu.my/id/eprint/24961/1/Thermodynamic%20study%20of%20the%20complexation%20of%20p.pdf
http://psasir.upm.edu.my/id/eprint/24961/
http://www.mdpi.com/
_version_ 1643828516603559936
score 13.211869

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