Abstract
AbstractThe synthesis of a series of dumbbell‐shaped compounds, which can act as a host (e.g., toward alkali metal cations) and as a guest (e.g., toward cyclobis(paraquat‐p‐phenylene)) in a supramolecular context is described. The self‐assembly of [2]pseudorotaxanes and [2]rotaxanes, in which cyclobis(paraquat‐p‐phenylene) encircles polyether chains intercepted in their middles by a hydroquinone ring and terminated at each end by 12‐crown‐4, 15‐crown‐5, monoaza‐18‐crown‐6, 18‐crown‐6, or adamantyl groups, is achieved using either threading, clipping, or slipping procedures. All the [2]pseudorotaxanes and [2]rotaxanes are characterized in solution by spectroscopic means and, in the case of two of the [2]rotaxanes, by X‐ray crystal structures in the solid state. In the presence of metal ions, [2]pseudorotaxanes carrying 12‐crown‐4 or 15‐crown‐5 stoppers can be disassembled in solution. The research shows how one kind of complexation can affect another kind of complexation—manifesting itself in a physical change in the system and so acting as a prototype of a potential molecular device.
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Dates
Type | When |
---|---|
Created | 11 years, 9 months ago (Nov. 21, 2013, 8:04 a.m.) |
Deposited | 1 year, 11 months ago (Sept. 12, 2023, 9:10 p.m.) |
Indexed | 1 year, 9 months ago (Oct. 30, 2023, 10:54 a.m.) |
Issued | 29 years, 7 months ago (Jan. 1, 1996) |
Published | 29 years, 7 months ago (Jan. 1, 1996) |
Published Online | 11 years, 9 months ago (Nov. 21, 2013) |
Published Print | 29 years, 7 months ago (Jan. 1, 1996) |
@article{Asakawa_1996, title={Functionalized [2]Rotaxanes}, volume={36}, ISSN={1869-5868}, url={http://dx.doi.org/10.1002/ijch.199600047}, DOI={10.1002/ijch.199600047}, number={4}, journal={Israel Journal of Chemistry}, publisher={Wiley}, author={Asakawa, Masumi and Ashton, Peter R. and Iqbal, Sayeedha and Quick, Andrew and Stoddart, J. Fraser and Tinker, Nigel D. and White, Andrew J.P. and Williams, David J.}, year={1996}, month=jan, pages={329–340} }