Versatile formation of [2]catenane and [2]pseudorotaxane structures; threading and noncovalent stoppering by a self-assembled macrocycle.
A self-assembled dimeric macrocycle between 4,4'-bis(4-pyridylmethoxy)biphenyl (L) and (en)Pd(NO(3))(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.
Lim
Choon Woo
CW
Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-747, Korea.
Sakamoto
Shigeru
S
Yamaguchi
Kentaro
K
Hong
Jong-In
JI