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- Title
Ionic Covalent Organic Frameworks with Spiroborate Linkage.
- Authors
Du, Ya; Yang, Haishen; Whiteley, Justin Michael; Wan, Shun; Jin, Yinghua; Lee, Se‐Hee; Zhang, Wei
- Abstract
A novel type of ionic covalent organic framework (ICOF), which contains sp3 hybridized boron anionic centers and tunable countercations, was constructed by formation of spiroborate linkages. These ICOFs exhibit high BET surface areas up to 1259 m2 g−1 and adsorb a significant amount of H2 (up to 3.11 wt %, 77 K, 1 bar) and CH4 (up to 4.62 wt %, 273 K, 1 bar). Importantly, the materials show good thermal stabilities and excellent resistance to hydrolysis, remaining nearly intact when immersed in water or basic solution for two days. The presence of permanently immobilized ion centers in ICOFs enables the transportation of lithium ions with room-temperature lithium-ion conductivity of 3.05×10−5 S cm−1 and an average Li+ transference number value of 0.80±0.02. Our approach thus provides a convenient route to highly stable COFs with ionic linkages, which can potentially serve as absorbents for alternative energy sources such as H2, CH4, and also as solid lithium electrolytes/separators for the next-generation lithium batteries.
- Subjects
COVALENT crystals; POROUS materials synthesis; TRANSESTERIFICATION; LITHIUM ions; GAS absorption &; adsorption
- Publication
Angewandte Chemie, 2016, Vol 128, Issue 5, p1769
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201509014