Supramolecular Self-assembly Formed from Cucurbit[8]uril and p-Hydroxybenzoic Acid

Wang, Chenghui; Yu, Zhichao; Bai, Qinghong; Pan, Dingwu; Prior, Timothy J.; Tao, Zhu; Redshaw, Carl; Xiao, Xin

Abstract

The binding behavior of cucurbit[8]uril(Q[8]) and p-hydroxybenzoic acid(p-HBA) has been investigated using 1H NMR titration experiments, UV-Vis absorption, isothermal titration calorimetry(ITC), and X-ray crystallography. Results revealed that the Q[8] can accommodate two p-HBA molecules to form a 1:2 host-guest inclusion complex in solution, namely (p-HBA)2@Q[8]. From a poorly scattering crystal, we were able to identify two symmetry unique Q[8] rings, but with different p-HBA fillings. The structure can be represented as Q[8]+1.5 p-HBA, which gives Q[8]@(p-HBA)2·Q[8]@p-HBA as the structural formula. This supramolecular structure was screened for its ability to capture iodine. The experimental results showed that the adsorption efficiency of the supramolecular organic framework material for iodine capture was 43.8%, with an equilibrium adsorption capacity of 223.3 mg/g.

Citation

Wang, C., Yu, Z., Bai, Q., Pan, D., Prior, T. J., Tao, Z., Redshaw, C., & Xiao, X. (2023). Supramolecular Self-assembly Formed from Cucurbit[8]uril and p-Hydroxybenzoic Acid. Chemical Research in Chinese Universities, https://doi.org/10.1007/s40242-023-3119-9

• Journal Article Type: Article
• Acceptance Date: Jun 25, 2023
• Online Publication Date: Aug 31, 2023
• Publication Date: Jan 1, 2023
• Deposit Date: Sep 1, 2023
• Publicly Available Date: Jan 2, 2024
• Journal: Chemical Research in Chinese Universities
• Print ISSN: 1005-9040
• Electronic ISSN: 2210-3171
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• DOI: https://doi.org/10.1007/s40242-023-3119-9
• Keywords: Supramolecular self-assembly; Cucurbit[8]uril; p-Hydroxybenzoic
• Public URL: https://hull-repository.worktribe.com/output/4372590
• Additional Information: Received: 11 May 2023; Accepted: 25 June 2023; First Online: 31 August 2023; : The authors declare no conflicts of interest.