An Ultramicroporous Hydrogen‐Bonded Organic Framework Exhibiting High C2H2/CO2 Separation. (27th July 2022)

• Record Type: Journal Article
• Authors: Yang, Yisi; Zhang, Hao; Yuan, Zhen; Wang, Jia‐Qi; Xiang, Fahui; Chen, Liangji; Wei, Fangfang; Xiang, Shengchang; Chen, Banglin; Zhang, Zhangjing
• Is Part Of: Angewandte Chemie. Volume 134:Number 43(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-07-27
• Subjects: C2H2/CO2 Separation -- Electrostatic Potential -- Hydrogen-Bonded Organic Framework; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202207579
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: The separation of C2 H2 /CO2 is not only industrially important for acetylene purification but also great scientific challenge due to their very similar molecular size and physical properties. To address this difficulty, herein, we present an ultramicroporous hydrogen‐bonded organic framework (HOF‐FJU‐1) from tetracyano bicarbazole to separate C2 H2 from CO2 by taking advantage of differences in their electrostatic potential distribution. This material possesses a suitable pore environment and electrostatic potential distribution fitting well to C2 H2, thus showing extra strong affinity to C2 H2 (46.73 kJ mol −1 ) and the highest IAST selectivity of 6675 for C2 H2 /CO2 separation among the adsorbents reported. The single crystal X‐ray diffraction reveals that the suitable pore environment in HOF‐FJU‐1 provides multiple C−H⋅⋅⋅π and hydrogen‐bonded interactions N⋅⋅⋅H−C with C2 H2 molecules. Dynamic breakthrough experiments demonstrate its outstanding separation performance to C2 H2 /CO2 mixtures. Abstract : With a suitable pore environment and complementary electrostatic potential distribution fitting well to acetylene (C2 H2 ) molecule, the ultramicroporous hydrogen‐bonded organic framework HOF‐FJU‐1 exhibits extra strong affinity to C2 H2 (46.73 kJ mol −1 ) and the highest IAST selectivity of 6675 for C2 H2 /CO2 separation.