Potassium Sensing Calix[4]arene Crown Ethers
1,3-Alternate calix[4]arene crown-5 (1) and corresponding biscrown-5 (2) were synthesized and the complexation behavior with alkali metal ions examined. For both 1 and 2, potassium ion was selectively extracted from aqueous phase into organic phase over other alkali metal ions based on two phase ext...
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| Veröffentlicht in: | Microchemical journal 1998-07, Vol.59 (3), p.464-471 |
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| container_end_page | 471 |
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| container_issue | 3 |
| container_start_page | 464 |
| container_title | Microchemical journal |
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| creator | Kim, Jong Seung Lee, Won Ku Ra, Do Young Lee, Yong-Ill Choi, Wang Kyu Lee, Kune Woo Oh, Won-Zin |
| description | 1,3-Alternate calix[4]arene crown-5 (1) and corresponding biscrown-5 (2) were synthesized and the complexation behavior with alkali metal ions examined. For both 1 and 2, potassium ion was selectively extracted from aqueous phase into organic phase over other alkali metal ions based on two phase extraction experiment. The complexation ratio between calix[4]arene biscrown-5 (2), in which two crown cavities connect to the calix[4]arene framework by 1,3-alternate fashion and potassium metal ion is found to 1:1 by proton NMR spectroscopy and extraction equilibria. Association constants (logKa) for 1 and 2 were determined to give 2.51 and 3.49, respectively. |
| doi_str_mv | 10.1006/mchj.1998.1630 |
| format | Article |
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For both 1 and 2, potassium ion was selectively extracted from aqueous phase into organic phase over other alkali metal ions based on two phase extraction experiment. The complexation ratio between calix[4]arene biscrown-5 (2), in which two crown cavities connect to the calix[4]arene framework by 1,3-alternate fashion and potassium metal ion is found to 1:1 by proton NMR spectroscopy and extraction equilibria. 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For both 1 and 2, potassium ion was selectively extracted from aqueous phase into organic phase over other alkali metal ions based on two phase extraction experiment. The complexation ratio between calix[4]arene biscrown-5 (2), in which two crown cavities connect to the calix[4]arene framework by 1,3-alternate fashion and potassium metal ion is found to 1:1 by proton NMR spectroscopy and extraction equilibria. 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For both 1 and 2, potassium ion was selectively extracted from aqueous phase into organic phase over other alkali metal ions based on two phase extraction experiment. The complexation ratio between calix[4]arene biscrown-5 (2), in which two crown cavities connect to the calix[4]arene framework by 1,3-alternate fashion and potassium metal ion is found to 1:1 by proton NMR spectroscopy and extraction equilibria. Association constants (logKa) for 1 and 2 were determined to give 2.51 and 3.49, respectively.</abstract><cop>New York, NY</cop><pub>Elsevier B.V</pub><doi>10.1006/mchj.1998.1630</doi><tpages>8</tpages></addata></record> |
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| ispartof | Microchemical journal, 1998-07, Vol.59 (3), p.464-471 |
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| source | Elsevier ScienceDirect Journals |
| subjects | Analytical chemistry Chemical and thermal methods Chemistry Exact sciences and technology |
| title | Potassium Sensing Calix[4]arene Crown Ethers |
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