| Literature DB >> 18774808 |
Jonathan L Sessler1, Sung Kuk Kim, Dustin E Gross, Chang-Hee Lee, Jong Seung Kim, Vincent M Lynch.
Abstract
An ion-pair receptor, 1, containing both cation- and anion-recognizing sites, has been synthesized and characterized. Single-crystal X-ray diffraction structural studies and (1)H NMR spectroscopic analyses confirmed that 1 forms stable 1:1 complexes with CsF in solution and in the solid state in spite of the large separation enforced between the receptor-bound anion and cation. In 9:1 CDCl3/CD3OD, binding of fluoride anion within the calix[4]pyrrole core of 1 was not observed in the absence of a cobound cesium cation; however, it was seen in this solvent mixture under conditions where a Cs(+) cation was bound to the crown ether-strapped calix[4]arene subunit.Entities:
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Year: 2008 PMID： 18774808 PMCID： PMC2645898 DOI： 10.1021/ja804976f
Source DB: PubMed Journal: J Am Chem Soc ISSN： 0002-7863 Impact factor: 15.419