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

In this study, single crystal X-ray diffraction and 1H NMR spectroscopy were used to examine the interaction of the guest 1,5-pentanediamine with inverted cucurbit[6]uril (iQ[6]) in the presence of [ZnCl4]2- anion. The results show that [ZnCl4]2- and [Zn(H2O)Cl3]- anions form a honeycomb framework structure, and iQ[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 1,5pentanediamine guest are situated at the entrance of the central cavity, while the alkyl chain part resides in the central cavity of the iQ[6].