Facile construction of a click-based robust porous organic polymer and its in-situ sulfonation for proton conduction

• Published in: Microporous and mesoporous materials Vol. 325; p. 111348
• Main Authors: Zhang, Deshan, Gao, Yanyan, Luan, Tian-Xiang, Cheng, Ke, Li, Chunhui, Li, Pei-Zhou
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.10.2021
• Subjects: Click reaction; Fuel cell; Porous organic polymer; Proton conduction; Sulfonic acid; Porous organic polymer; Click reaction; Proton conduction; Fuel cell; Sulfonic acid
• ISSN: 1387-1811; 1873-3093
• DOI: 10.1016/j.micromeso.2021.111348

A triazole-based porous organic polymer (TaPOP-1) was successfully synthesized by the judicious “click” combination of tetrahedral azide-containing and triple-symmetrical acetylene-containing modules. Thermogravimetric analysis displayed that it possesses a thermal stability up to 180 °C. N2 sorption experiments before and after solvent immerging revealed that it is a robust organic polymer with a high porosity. Investigations of electrochemical impedance spectroscopy measurements revealed that when incorporating sulfonic acid into the clicked POP during the in-situ reaction process, a remarkable increase in proton conductivity proportionally to the ratio of the introduced sulfonic acids was observed, and the finally resultant sulfonated TaPOP–SO3H-3 displays a proton conductivity of 0.92 × 10−2 S cm−1 at 353K under 98% Relative Humidity (RH), nearly 4 orders of magnitude enhancement than the value of the pristine TaPOP-1 (6.7 × 10−6 S cm−1) at the same condition. This work demonstrates that utilizing the versatile “click” reaction, not only robust porous materials can be facilely constructed, but also highly promising candidates of proton-conductive electrolytes can be achieved via in-situ grafting strong acids into the skeletons of porous materials. [Display omitted] •A triazole-based Porous Organic Framework (POP) was facilely constructed by the versatile click reaction.•The in-situ generated triazole linkages make the constructed POP possesses high thermal and humidity stability.•In-situ incorporation of sulfonic acids into the clicked POP makes the sulfonated POP high proton conductivity.