Cross-linked supramolecular polymer networks constructed by pillar[5]arene-based host–guest recognition and coordination/oxidation of catechol

Abstract

In this work, two cross-linked supramolecular polymers are prepared by pillar[5]arene-based molecular recognition and coordination/oxidation of catechol. In addition, two supramolecular glues are obtained at high concentrations of the cross-linked...

Cross-Linked Supramolecular Polymer Based on Calix[4]pyrrole-Decorated Pillar[5]arene and Its Application in Micropollutant Removal

“…One of the supramolecular building blocks, which is used to construct cross-linked supramolecular polymer networks, is pillar[5]­arenes (P5As). P5As are uniquely rigid pillar-like structures in which hydroquinone units are connected to each other via methylene bridges in para positions. , They can form stable host–guest complexes with a variety of guest moieties including nitriles, pyridinium salts, alkylamines, organic ammonium salts, and haloalkanes. − This versatility found correspondence in a report by Wang and co-workers showing the utilization of P5A-based cross-linked supramolecular polymers in the formation of responsive glues based on pH-dependent catechol-Fe n+ complexes . Metal–ligand coordination- and π–π stacking-based supramolecular networks of P5As were also demonstrated by means of linear and discrete architectures. − P5A-based supramolecular network and hyperbranched polymers were also utilized in the removal of micropollutants from water and exhibited considerable promise. , …”

“…15−18 This versatility found correspondence in a report by Wang and co-workers showing the utilization of P5A-based cross-linked supramolecular polymers in the formation of responsive glues based on pH-dependent catechol-Fe n+ complexes. 19 Metal− ligand coordination-and π−π stacking-based supramolecular networks of P5As were also demonstrated by means of linear and discrete architectures. 20−22 P5A-based supramolecular network and hyperbranched polymers were also utilized in the removal of micropollutants from water and exhibited considerable promise.…”

Covalently bridged pillararene-based polymers: structures, synthesis, and applications

“…51 Lately, LP-14 was prepared by Liu and co-workers in two steps. 52 Firstly, numerous complexes were created with phenolic hydroxyl functionalized pillar[5]arene P16 and neutral guest molecules via host–guest interactions. Subsequently, LP-14 was constructed through oxidation reaction between phenolic hydroxyl groups on P16 in the presence of benzoyl peroxide as an oxidizing agent.…”

Tetraethylene glycol-based polymer networks for the efficient removal of radioactive methyl iodide and iodine vapor

“…Electron-rich and easy-tosynthesize pillar [5]arene (P[5]A) was introduced to the polymer to adjust the hydrophilicity and improve the I 2 adsorption capacity. [37][38][39][40][41][42][43][44][45] Two monomers, ATTEG-P5A and ATTEG, and a flexible cross-linker, DATTEG, were synthesized for one-pot copolymerization in N,N-dimethylformamide (DMF) initiated by azoisobutyronitrile (AIBN) (Schemes S1, S2 and Fig. S1-S15 †).…”