Crown-6-calix[4]arene-Capped Calix[4]pyrrole: An Ion-Pair Receptor for Solvent-Separated CsF Ions

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• 作者：Jonathan L. Sessler ; Sung Kuk Kim ; Dustin E. Gross ; Chang-Hee Lee ; Jong Seung Kim ; Vincent M. Lynch
• 刊名：Journal of the American Chemical Society
• 出版年：2008
• 出版时间：October 1, 2008
• 年：2008
• 卷：130
• 期：39
• 页码：13162-13166
• 全文大小：248K
• 年卷期：v.130,no.39(October 1, 2008)
• ISSN：1520-5126

文摘

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 ¹H 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.