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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| Format: | Article |
| Language: | English English |
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MDPI
2011
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| Online Access: | http://psasir.upm.edu.my/id/eprint/24961/1/Thermodynamic%20study%20of%20the%20complexation%20of%20p.pdf |
| _version_ | 1825925679821094912 |
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| author | Ahmadzadeh, Saeid Kassim , Anuar Rezayi, Majid Rounaghi, Gholam Hossein |
| author_facet | Ahmadzadeh, Saeid Kassim , Anuar Rezayi, Majid Rounaghi, Gholam Hossein |
| author_sort | Ahmadzadeh, Saeid |
| collection | UPM |
| 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. |
| first_indexed | 2024-03-06T08:01:24Z |
| format | Article |
| id | upm.eprints-24961 |
| institution | Universiti Putra Malaysia |
| language | English English |
| last_indexed | 2024-03-06T08:01:24Z |
| publishDate | 2011 |
| publisher | MDPI |
| record_format | dspace |
| spelling | 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 |
| 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. |
| title | 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_short | 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 |
| url | http://psasir.upm.edu.my/id/eprint/24961/1/Thermodynamic%20study%20of%20the%20complexation%20of%20p.pdf |
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