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Versatile Formation of [2]Catenane and [2]Pseudorotaxane Structures; Threading and Noncovalent Stoppering by a Self-Assembled Macrocycle

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journal contribution
posted on 01.04.2004, 00:00 by Choon Woo Lim, Shigeru Sakamoto, Kentaro Yamaguchi, Jong-In Hong
A self-assembled dimeric macrocycle between 4,4‘-bis(4-pyridylmethoxy)biphenyl (L) and (en)Pd(NO3)2 was constructed, and its interactions with cyclodextrins of different cavity size resulted in the formation of [2]catenane and [2]pseudorotaxane systems, respectively. The structures were identified by 1D and 2D NMR spectroscopy and cold spray ionization mass (CSI-MS) spectrometry.