The Nature of Aqueous Solutions of a Cationic Calix[4]arene: A Comparative Study of Dye–Calixarene and Dye–Surfactant Interactions
Among different types of calixarenes, the water–soluble ones are of especial interestbecause of their possible applications in biochemical research. In order to elucidate the natureof aqueous solutions of a cationic amphiphilic calixarene, substituted tetrapropoxycalix[4]arene bearing hydrophil...
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| Format: | Article |
| Language: | English |
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MDPI AG
2006-08-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/6/8/962/ |
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| author | V. I. Kalchenko V. I. Boyko R. V. Rodik A. G. Yakubovskaya N. A. Vodolazkaya L. N. Vilkova N. O. Mchedlov-Petrossyan |
| author_facet | V. I. Kalchenko V. I. Boyko R. V. Rodik A. G. Yakubovskaya N. A. Vodolazkaya L. N. Vilkova N. O. Mchedlov-Petrossyan |
| author_sort | V. I. Kalchenko |
| collection | DOAJ |
| description | Among different types of calixarenes, the water–soluble ones are of especial interestbecause of their possible applications in biochemical research. In order to elucidate the natureof aqueous solutions of a cationic amphiphilic calixarene, substituted tetrapropoxycalix[4]arene bearing hydrophilic choline groups at the upper rim, we studied vis–spectroscopically the influence of the above system on the acid–base behavior of threeindicator dyes, namely, 2,4-dinitrophenol, bromophenol blue, and N,N/-dioctadecylrhodamine,at constant ionic strength of 0.05 M, maintained with NaCl addition. Simultaneously,‘apparent’ ionization constants, Kaa , of the same dyes were determined in the presence ofcommon cationic surfactant micelles. Within the concentration range from 1.0×10–5 to 0.01 M,the aforementioned water–soluble calixarene displays effects similar to those of micelles ofcetyltrimethylammonium bromide (or chloride). The shifts of the absorption and emissionbands in the visible region, as well as the alterations of the Kaa values against the ‘aqueous’ones appeared to be very similar in aqueous solutions of both calix[4]arene and cationicsurfactant. A conclusion can be made about aggregation (or association), i.e., micelleformation of the cationic calix[4]arene under study. |
| first_indexed | 2024-04-11T14:11:46Z |
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| id | doaj.art-c29e770957304f2ea6b8c410331affd6 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T14:11:46Z |
| publishDate | 2006-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-c29e770957304f2ea6b8c410331affd62022-12-22T04:19:42ZengMDPI AGSensors1424-82202006-08-016896297710.3390/s6080962The Nature of Aqueous Solutions of a Cationic Calix[4]arene: A Comparative Study of Dye–Calixarene and Dye–Surfactant InteractionsV. I. KalchenkoV. I. BoykoR. V. RodikA. G. YakubovskayaN. A. VodolazkayaL. N. VilkovaN. O. Mchedlov-PetrossyanAmong different types of calixarenes, the water–soluble ones are of especial interestbecause of their possible applications in biochemical research. In order to elucidate the natureof aqueous solutions of a cationic amphiphilic calixarene, substituted tetrapropoxycalix[4]arene bearing hydrophilic choline groups at the upper rim, we studied vis–spectroscopically the influence of the above system on the acid–base behavior of threeindicator dyes, namely, 2,4-dinitrophenol, bromophenol blue, and N,N/-dioctadecylrhodamine,at constant ionic strength of 0.05 M, maintained with NaCl addition. Simultaneously,‘apparent’ ionization constants, Kaa , of the same dyes were determined in the presence ofcommon cationic surfactant micelles. Within the concentration range from 1.0×10–5 to 0.01 M,the aforementioned water–soluble calixarene displays effects similar to those of micelles ofcetyltrimethylammonium bromide (or chloride). The shifts of the absorption and emissionbands in the visible region, as well as the alterations of the Kaa values against the ‘aqueous’ones appeared to be very similar in aqueous solutions of both calix[4]arene and cationicsurfactant. A conclusion can be made about aggregation (or association), i.e., micelleformation of the cationic calix[4]arene under study.http://www.mdpi.com/1424-8220/6/8/962/Cationic water-soluble calix[4]areneIndicator dyeIonization constant. |
| spellingShingle | V. I. Kalchenko V. I. Boyko R. V. Rodik A. G. Yakubovskaya N. A. Vodolazkaya L. N. Vilkova N. O. Mchedlov-Petrossyan The Nature of Aqueous Solutions of a Cationic Calix[4]arene: A Comparative Study of Dye–Calixarene and Dye–Surfactant Interactions Sensors Cationic water-soluble calix[4]arene Indicator dye Ionization constant. |
| title | The Nature of Aqueous Solutions of a Cationic Calix[4]arene: A Comparative Study of Dye–Calixarene and Dye–Surfactant Interactions |
| title_full | The Nature of Aqueous Solutions of a Cationic Calix[4]arene: A Comparative Study of Dye–Calixarene and Dye–Surfactant Interactions |
| title_fullStr | The Nature of Aqueous Solutions of a Cationic Calix[4]arene: A Comparative Study of Dye–Calixarene and Dye–Surfactant Interactions |
| title_full_unstemmed | The Nature of Aqueous Solutions of a Cationic Calix[4]arene: A Comparative Study of Dye–Calixarene and Dye–Surfactant Interactions |
| title_short | The Nature of Aqueous Solutions of a Cationic Calix[4]arene: A Comparative Study of Dye–Calixarene and Dye–Surfactant Interactions |
| title_sort | nature of aqueous solutions of a cationic calix 4 arene a comparative study of dyea¢a€a calixarene and dyea¢a€a surfactant interactions |
| topic | Cationic water-soluble calix[4]arene Indicator dye Ionization constant. |
| url | http://www.mdpi.com/1424-8220/6/8/962/ |
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