Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 130, Issue 39, Pages 13162-13166Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja804976f
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Funding
- National Institutes of Health [GM 58907]
- Korea Science and Engineering Foundation [R01-2006-000-10001-0]
- South Korean government (MOST)
- National Research Foundation of Korea [R11-2001-090-03007-0, R01-2006-000-10001-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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 H-1 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.
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