Supramolecular Self-assemblies of inverted cucurbit[6]uril with 1,5-pentanediamine

In this study, single crystal X-ray diffraction and 1 H NMR spectroscopy were used to examine the interaction of the guest 1,5-pentanediamine with inverted cucurbit[6]uril ( i Q[6]) in the presence of [ZnCl 4 ] 2− anion. The results show that [ZnCl 4 ] 2− and [Zn(H 2 O)Cl 3 ] − anions form a honeycomb framework structure, and i Q[6] forms a 1:1 complex with 1,5-pentanediamine. Inverted cucurbit[6]uril forms molecular chains via outer surface interactions, which in turn fill in the honeycomb framework structure. The amino groups at both ends of the 1,5-pentanediamine guest are situated at the entrance of the central cavity, while the alkyl chain part resides in the central cavity of the i Q[6].