Supramolecular assemblies constructed from inverted cucurbituril and lanthanide cations : synthesis, structure and sorption properties
Li, Qing; Qiu, Sheng-Chao; Zhang, Yun-Qian; Xue, Sai-Feng; Tao, Zhu (Chemist); Prior, Timothy J.; Redshaw, Carl; Xiao, Xin; Zhu, Qian-Jiang
Department of Chemistry; Department of Chemistry
- ©2017 University of Hull
The interaction of a series of lanthanide cations (Ln³⁺) with inverted cucurbituril (iQ) in the presence of [ZnCl₄]²⁻ anions as a structure-directing agent have been investigated. Single-crystal X-ray diffraction analysis has revealed that the [ZnCl₄]²⁻ anions surround the iQ molecules via outer surface interactions of iQ. This results in the formation of honeycomb-like frameworks, and ultimately linear supramolecular chains of iQ in which Ln³⁺ cations occupy voids within the framework. Moreover, these iQ/Ln³⁺-based supramolecular assemblies exhibit excellent thermal stability as well as permanent porosity, and in one case screening revealed high CH₃OH uptake capacity compared with other porous organic materials assembled solely through hydrogen bonding under ambient conditions.
- The University of Hull
- Peer reviewed