Jiang Guoxing, Zou Wenwu, Ou Zhaoyuan, Zhang Longhai, Zhang Weifeng, Wang Xiujun, Song Huiyu, Cui Zhiming, Liang Zhenxing, Du Li
Guangdong Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China.
Angew Chem Int Ed Engl. 2022 Aug 26;61(35):e202208086. doi: 10.1002/anie.202208086. Epub 2022 Jul 21.
The development of effective, stable anhydrous proton-conductive materials is vital but challenging. Covalent organic frameworks (COFs) are promising platforms for ion and molecule conduction owing to their pre-designable structures and tailor-made functionalities. However, their poor chemical stability is due to weak interlayer interactions and intrinsic reversibility of linkages. Herein, we present a strategy for enhancing the interlayer interactions of two-dimensional COFs via importing planar, rigid triazine units into the center of C -symmetric monomers. The developed triazine-core-based COF (denoted as TPT-COF) possesses a well-defined crystalline structure, ordered nanochannels, and prominent porosity. The proton conductivity was ≈10 times those of non-triazinyl COFs, even reaching up to 1.27×10 S cm at 160 °C. Furthermore, the TPT-COF exhibited structural ultrastability, making it an effective proton transport platform with remarkable conductivity and long-term durability.
开发高效、稳定的无水质子传导材料至关重要但具有挑战性。共价有机框架（COF）因其可预先设计的结构和定制功能，是离子和分子传导的有前景的平台。然而，它们较差的化学稳定性归因于层间相互作用较弱以及键的固有可逆性。在此，我们提出一种策略，通过将平面刚性三嗪单元引入C对称单体的中心来增强二维COF的层间相互作用。所开发的基于三嗪核的COF（表示为TPT-COF）具有明确的晶体结构、有序的纳米通道和显著的孔隙率。质子传导率是非三嗪基COF的约10倍，在160°C时甚至高达1.27×10⁻³ S cm⁻¹。此外，TPT-COF表现出结构超稳定性，使其成为具有卓越传导率和长期耐久性的有效质子传输平台。
