Complexation between Pillar[5]arenes and a Secondary Ammonium Salt

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• 作者：Chengyou Han ; Guocan Yu ; Bo Zheng ; Feihe Huang
• 刊名：Organic Letters
• 出版年：2012
• 出版时间：April 6, 2012
• 年：2012
• 卷：14
• 期：7
• 页码：1712-1715
• 全文大小：215K
• 年卷期：v.14,no.7(April 6, 2012)
• ISSN：1523-7052

文摘

We demonstrate that n-octylethyl ammonium hexafluorophosphate (G) can thread through the cavity of 1,4-dimethoxypillar[5]arene to form a [2]pseudorotaxane with a binding constant of 1.09 (卤0.31) 脳 10³ M^鈥? in chloroform. The formation of this threaded structure has been confirmed by proton NMR spectroscopy, electrospray ionization mass spectrometry, and X-ray single crystal analysis. The complexation between 1,4-dimethoxypillar[5]arene and G in chloroform can be switched off by adding Cl^{鈥?/sup>. For comparison, the complexation between 1,4-bis(n-propoxy)pillar[5]arene and G has also been investigated.}