A novel ditopic receptor and reversal of anion binding selectivity in the presence and absence of bound cation |
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Authors: | Tumcharern Gamolwan Tuntulani Thawatchai Coles Simon J Hursthouse Michael B Kilburn Jeremy D |
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Institution: | Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand. |
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Abstract: | A calix4]arene-derived ditopic receptor 1 has been synthesized. In the absence of Na+, the receptor binds acetate in preference to diphenyl phosphate (as the tetrabutylammonium salts), but in the presence of Na+, the selectivity is reversed and the receptor, instead, binds diphenyl phosphate, and not acetate, which preferentially forms a salt ion-pair in free solution. structure: see text] |
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