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Title: Covalent organic frameworks for simultaneous co2 capture and selective catalytic transformation
Authors: Li, Yaling
Zhang, Jianqiang
Zuo, Kaiming
Li, Zhongping
Wang, Yu
Hu, Hui
Zeng, Chaoyuan
Xu, Huanjun
Wang, Baoshan
Gao, Yanan
Keywords: Carbon dioxide capture
Carbon dioxide conversion
Carbon resource
Covalent organic framework
Cyclic carbonate
Heterogeneous catalysts
Issue Date: 21-Sep-2021
Publisher: MDPI
Citation: Li, Yaling, Zhang, Jianqiang, Zuo, Kaiming, Li, Zhongping, Wang, Yu, Hu, Hui, Zeng, Chaoyuan, Xu, Huanjun, Wang, Baoshan, Gao, Yanan (2021-09-21). Covalent organic frameworks for simultaneous co2 capture and selective catalytic transformation. Catalysts 11 (9) : 1133. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: Combination of capture and simultaneous conversion of CO2 into valuable chemicals is a fascinating strategy for reducing CO2 emissions. Therefore, searching for heterogeneous catalysts for efficient catalytic conversion of CO2 is of great importance for carbon capture and utilization. Herein, we report a metalloporphyrin-based covalent organic framework (Co(II)@TA-TF COF) that can capture CO2 and simultaneously convert it into cyclic carbonates under mild conditions. The COF was designed to possess micropores for the adsorption of CO2 and integrated with cobalt(II) porphyrin (Co(II)@TAPP) units as catalytic sites into the vertices of the layered tetragonal networks. The structure of the Co(II)@TA-TF COF is unique where Co(II)@TAPP units are alternately stacked along the z direction with a slipped distance of 1.7 Å, which gives an accessible space to accommodate small molecules, making it possible to expose catalytic sites to substrates within the adjacent stacked layers. As a result, this COF is found to be highly effective for the addition of CO2 and epoxides. Importantly, the Co(II)@TA-TF COF exhibited a dramatic size selectivity for substrates. In conjunction with its reusability, our results highlight the development of a new function of COFs for targeting simultaneous CO2 absorption and utilization upon complementary exploration of the structural features of skeletons and pores. Such promising catalytic performance of the COF makes it possible for its potential practical application. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Source Title: Catalysts
ISSN: 2073-4344
DOI: 10.3390/catal11091133
Rights: Attribution 4.0 International
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