Controllable CO2 Capture in Metal–Organic Frameworks: Making Targeted Active Sites Respond to Light

• DOI: 10.1021/acs.iecr.0c04126
• Publication Date: 2020-12-08T07:38:49Z
• Authors: Yao Jiang; Xiao-Chuan Shi; Peng Tan; Shi-Chao Qi; Chen Gu; Tao Yang; Song-Song Peng; Xiao-Qin Liu; Lin-Bing Sun
• Keywords: Azobenzene; Selective adsorption

Light-responsive metal–organic frameworks (LMOFs) are intriguing materials for CO2 capture owing to their tunable structures and performances. However, conventional LMOFs reported regulate adsorption capacity by steric hindrance or structural variation because of the weak affinity between adsorbate adsorbent. Developing efficient LMOF-based adsorbents with strong but active sites controllable is an extremely desirable yet challenging task. In this work, we constructed adsorbent targeted incorporating polyethyleneimine into azobenzene-decorated LMOF capture. The amines endow enhanced selectivity in CO2. Additionally, surface electrostatic potential around can be regulated isomerization azobenzene moieties upon light irradiation. Moreover, reversible irradiation generates exposed/sheltered on amines. present work encourages us develop novel separation, which hard realize LMOFs.