Figure 6.

(a) Schematic representation of the synthesis of conjugated microporous polymers based on pillar[5]arene (P5-CMPs) through Sonogashira–Hagihara cross-coupling reaction for propane/methane separation. (b) Synthetic scheme of pillar[5]arene-based porous polymer (pTC-P5A) thin film through interfacial polymerization and charge selective separation of organic dye molecules by pTC-P5A membrane. (c) Mechanochemical synthesis of MHP-P5Q polymer using pillar[5]quinone (P5Q) and triptycenehexamine (THA). (d) Single-crystal X-ray structure of methyl iodide (CH₃I)-loaded perethylated pillar[5]arene (2CH₃I@EtP5), indicating encapsulation of two methyl iodide molecules per cavitand. (e) Methylation of amine functionalities on MHP-P5Q during chemisorption process of methyl iodide. Panels c and d were adapted with permission from ref (13b). Copyright 2020 Springer Nature.