New P-bridgehead urea-based tripodal anion receptors for H₂PO₄^{?/sup> recognition}

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• 作者：Lin Wu ; Li Liu ; Ru Fang ; Chao Deng ; Jun Han ; Hongwen Hu ; Chen Lin ; ^{linchen@nju.edu.cn} ; Leyong Wang
• 关键词：Anion receptor ; P-bridgehead ; Urea-based ; Dihydrogenphosphate ; Tripod
• 刊名：Tetrahedron Letters
• 出版年：2012
• 出版时间：11 July, 2012
• 年：2012
• 卷：53
• 期：28
• 页码：3637-3641
• 全文大小：800 K

文摘

A series of new P-bridgehead tripodal urea-based anion receptors 1-3 bearing phosphine oxide (PO) were synthesized and characterized. Their anion-binding ability was examined by UV-vis, ¹H NMR, ³¹P NMR, and ESI-MS. The results revealed that receptors 1-3 showed good sensitivity, selectivity, and binding affinity for H₂PO₄^{?/sup> over NO₃?/sup> and Br?/sup>, and among them receptor 2 showed the best binding affinity for H₂PO₄?/sup> over F?/sup>, Br?/sup>, CH₃COO?/sup>, HSO₄?/sup>, and NO₃?/sup>. The Job plot experiments indicated that receptors 1-3 formed 1:1 stoichiometric complex with H₂PO₄?/sup>.}