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Controlling the Rate of Shuttling Motions in [2]Rotaxanes by Electrostatic Interactions: A Cation as Solvent-Tunable Brake

Ghosh, P. ; Federwisch, G. ; Kogey, M. ; Schalley, C. A. ; Haase, D. ; Saak, W. ; Lützen, A. ; Gschwind, R. M.


A series of rotaxanes, with phenolic axle centerpieces and tetralactam macrocycles as the wheels, has been prepared in good yields. The threaded rotaxane structure is confirmed in the gas phase by tandem mass spectrometric experiments through a detailed fragmentation pattern analysis, in solution by NMR spectroscopy, and in the solid state through X-ray crystallography. A close inspection of the ...


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