Thiadiazole-based 3D covalent organic framework for efficient anhydrous proton conduction

Abstract

The design and synthesis of three-dimensional (3D) covalent organic frameworks (COFs) with exceptional stability and high proton conductivity are critical for advancing high-temperature fuel cells but remain significantly challenging. In this study, thiadiazole groups were successfully incorporated into a novel 3D COF featuring a five-fold interpenetrated diamond network through a bottom-up self-assembly strategy. The proton conduction of the thiadiazole-based 3D COF (NUST-28) under anhydrous conditions reached up to 8.40 × 10−2 S cm−1 at 120 °C after phosphoric acid doping. Furthermore, the NUST-28 conductor demonstrated good stability at constant temperature and in cyclic experiments. This work paves the way for the design and construction of 3D COFs as platforms for fast ion transportation using reticular chemistry.

Graphical abstract: Thiadiazole-based 3D covalent organic framework for efficient anhydrous proton conduction

Supplementary files

Article information

Article type
Paper
Submitted
30 Sep 2024
Accepted
18 Nov 2024
First published
20 Nov 2024

CrystEngComm, 2025, Advance Article

Thiadiazole-based 3D covalent organic framework for efficient anhydrous proton conduction

Y. Pan, Z. Shan, Z. Liu, J. Su and G. Zhang, CrystEngComm, 2025, Advance Article , DOI: 10.1039/D4CE00995A

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