Supramolecular Self-assemblies of Tetramethylcucurbit[6]uril with 1-Butyl-4,4′-bipyridinium Bromide

One guest 1-butyl-4,4′-bipyridinium bromide(BV+) was designed and synthesized,while supramolecular assemblie of tetramethylcucurbit[6]uril(TMeQ[6]) with the guest BV+ was investigated by 1H NMR and UV-Vis absorption spectra,thermogravimetry analysis and X-ray crystallography in details.The experimental results showed that TMeQ[6] can preferred encapsulate the butyl moiety of the 1-butyl-4,4′-bipyridinium guest in its hydrophobic cavity to form inclusion complexes with a ratio of 1∶ 1 in the aqueous solution and solid state.This observation contributes to a deeper understanding in molecular recognition,design and construction of novel molecular machines.