Target Synthesis of an Azo (N═N) Based Covalent Organic Framework with High CO2-over-N2 Selectivity and Benign Gas Storage Capability

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• 作者：Rile Ge ; Dandan Hao ; Qi Shi ; Bin Dong ; Wenguang Leng ; Chang Wang ; Yanan Gao
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2016
• 出版时间：May 12, 2016
• 年：2016
• 卷：61
• 期：5
• 页码：1904-1909
• 全文大小：371K
• 年卷期：0
• ISSN：1520-5134

文摘

An azo (N═N) based covalent organic framework (COF-TpAzo) has been synthesized via a Schiff base condensation reaction. The Braunauer–Emmett–Teller (BET) specific surface area up to 1552 m²·g^–1 was obtained for the framework with a pore volume of 0.97 cm³·g^–1. The COF-TpAzo exhibits a high selectivity in CO₂/N₂ (127/145 at 273/298 K, respectively, Henry method) due to the N₂-phobic and CO₂-philic feature of COF-TpAzo. Furthermore, hydrogen and methane storage capacities of the nitrogen-rich COF-TpAzo have been investigated. The COF-TpAzo shows high H₂ and CH₄ storage capacity at 1 bar (10.6 mg·g^–1 at 77 K for H₂, 11.2 mg·g^–1 at 273 K for CH₄, and 5.5 mg·g^–1 at 298 K for CH₄).