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Open AccessArticle

Revisiting the Formation and Tunable Dissociation of a [2]Pseudorotaxane Formed by Slippage Approach

Department of Chemistry and Institute of Creativity, The Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong, China
Institute of Molecular Functional Materials, University Grants Committee, Hong Kong, China
Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2015, 16(4), 8254-8265;
Received: 26 March 2015 / Revised: 9 April 2015 / Accepted: 10 April 2015 / Published: 13 April 2015
(This article belongs to the Special Issue Supramolecular Interactions)
A new [2]pseudorotaxane DB24C8É1-H·PF6 with dibenzo[24]crown-8 (DB24C8) crown ether-dibenzylammonium (1-H·PF6) binding which was formed by slippage approach at different solvents and temperature, had been isolated and characterized by NMR spectroscopy and mass spectrometry. The [2]pseudorotaxane DB24C8É1-H·PF6 was stable at room temperature. The dissociation rate of [2]pseudorotaxane DB24C8É1-H·PF6 could be tuned by using different stimuli such as triethylamine (TEA)/diisopropylethylamine (DIPEA) and dimethyl sulfoxide (DMSO). In particular, the dissociation of [2]pseudorotaxane DB24C8É1-H·PF6 by an excess of TEA/DIPEA base mixture possessed a long and sustained, complete dissociation over 60 days. Other stimuli by DMSO possessed a relatively fast dissociation over 24 h. View Full-Text
Keywords: rotaxane; thermodynamic synthesis; dissociation; slippage; crown ether rotaxane; thermodynamic synthesis; dissociation; slippage; crown ether
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Leung, K.C.-F.; Lau, K.-N.; Wong, W.-Y. Revisiting the Formation and Tunable Dissociation of a [2]Pseudorotaxane Formed by Slippage Approach. Int. J. Mol. Sci. 2015, 16, 8254-8265.

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