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Simple one-pot syntheses allow the preparation of [2]rotaxane-based degenerate molecular shuttles featuring the recognition of pyridinium ions by BPX26C6 macrocycles. Because of the weak interactions between the BPX26C6 and pyridinium units in the [2]rotaxanes in CD 3 COCD 3 , the rates of shuttling of the BPX26C6 moieties between the pyridinium stations are rapid, relative to those...
A new host molecule in which only one diethylene glycol chain (i.e., a loop possessing only three oxygen atoms) suitably positioned in a macroring recognizes a DBA + ion to form a 1:1 pseudorotaxane-like complex. To confirm unambiguously that the pseudorotaxane exists in solution, a corresponding interlocked rotaxane molecule was synthesized.
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