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• W2129943838 endingPage "6982" @default.
• W2129943838 startingPage "6973" @default.
• W2129943838 abstract "Abstract Addition of 1‐alkyl‐3‐methylimidazolium (C n ‐mim) cations 3 – 5 to a mixture of bis‐phosphonium cation 2 and sodium p ‐sulfonatocalix[4]arene ( 1 ) in the presence of lanthanide ions results in the selective binding of an imidazolium cation into the cavity of the calixarene. The result is a multi‐layered solid material with an inherently flexible interplay of the components. Incorporating ethyl‐, n ‐butyl‐ or n ‐hexyl‐mim cations into the multi‐layers results in significant perturbation of the structure, the most striking effect is the tilting of the plane of the bowl‐shaped calixarene relative to the plane of the multi‐layer, with tilt angles of 7.2, 28.9 and 65.5°, respectively. The lanthanide ions facilitate complexation, but are not incorporated into the structures and, in all cases, the calixarene takes on a 5− charge, with one of the lower‐rim phenolic groups deprotonated. ROESY NMR experiments and other 1 H NMR spectroscopy studies establish the formation of 1:1 supermolecules of C n ‐mim and calixarene, regardless of the ratio of the two components, and indicate that the supermolecules undergo rapid exchange on the NMR spectroscopy timescale." @default.
• W2129943838 created "2016-06-24" @default.
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• W2129943838 date "2010-06-14" @default.
• W2129943838 modified "2023-10-18" @default.
• W2129943838 title "Selective Binding of Imidazolium Cations in Building Multi-Component Layers" @default.
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• W2129943838 doi "https://doi.org/10.1002/chem.200903320" @default.
• W2129943838 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20455217" @default.
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