An Azine-Linked Covalent Organic Framework: Synthesis, Characterization and Efficient Gas Storage

• Published in: Chemistry : a European journal Vol. 21; no. 34; pp. 12079 - 12084
• Main Authors: Li, Zhongping, Zhi, Yongfeng, Feng, Xiao, Ding, Xuesong, Zou, Yongcun, Liu, Xiaoming, Mu, Ying
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 17.08.2015; WILEY‐VCH Verlag; Wiley Subscription Services, Inc
• Subjects: Carbon capture and storage; Carbon dioxide; carbon dioxide uptake; Chemistry; Covalence; covalent organic framework; Hydrates; Hydrazines; hydrogen storage; porous material; Selectivity; Storage capacity; Surface area; Uptakes; porous material; selectivity; covalent organic framework; carbon dioxide uptake; hydrogen storage
• ISSN: 0947-6539; 1521-3765
• DOI: 10.1002/chem.201501206

A azine‐linked covalent organic framework, COF‐JLU2, was designed and synthesized by condensation of hydrazine hydrate and 1,3,5‐triformylphloroglucinol under solvothermal conditions for the first time. The new covalent organic framework material combines permanent micropores, high crystallinity, good thermal and chemical stability, and abundant heteroatom activated sites in the skeleton. COF‐JLU2 possesses a moderate BET surface area of over 410 m2 g−1 with a pore volume of 0.56 cm3 g−1. Specifically, COF‐JLU2 displays remarkable carbon dioxide uptake (up to 217 mg g−1) and methane uptake (38 mg g−1) at 273 K and 1 bar, as well as high CO2/N2 (77) selectivity. Furthermore, we further highlight that it exhibits a higher hydrogen storage capacity (16 mg g−1) than those of reported COFs at 77 K and 1 bar. An azine‐linked covalent organic framework was constructed by condensation of hydrazine hydrate and 1,3,5‐triformylphloroglucinol under solvothermal conditions. While the framework possesses moderate surface areas, it exhibits excellent capture and uptake capacities for CO2 (217 mg g−1), H2 (16 mg g−1), and CH4 (38 mg g−1) at 1 bar pressure, with high adsorption selectivity for CO2 over N2.