Tuning of Microenvironment in Covalent Organic Framework via Fluorination Strategy promotes Selective CO2 Capture.
Chemistry An Asian Journal - 2022 - Das - Tuning of Microenvironment in Covalent Organic Framework via Fluorination_removed.pdf
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KAUST DepartmentAdvanced Membranes and Porous Materials Research Center
Physical Science and Engineering (PSE) Division
Chemical Engineering Program
Embargo End Date2023-11-14
Permanent link to this recordhttp://hdl.handle.net/10754/685761
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AbstractHerein, we have designed and synthesized two heteroatom (N, O) rich covalent organic frameworks (COF), PD-COF and TF-COF, respectively, to demonstrate their relative effect on CO2adsorption capacity and also CO2/N2 selectivity. Compared to the non-fluorinated PD-COF (BET surface area 805 m2g-1, total pore volume 0.3647 ccg-1), a decrease in BET surface area and also pore volume have been observed for fluorinated TF-COF due to the incorporation of fluorine to the porous framework (BET surface area 451 m2g-1, total pore volume 0.2978 ccg-1). This fact leads to an enormous decrease in the CO2adsorption capacity and CO2/N2 selectivity of TF-COF, though it shows stronger affinity towards CO2 with a Qst of 37.76 KJ/mol. The more CO2 adsorption capacity by PD-COF can be attributed to the large specific surface area with considerable amount of micropore volume compared to the TF-COF. Further, PD-COF exhibited CO2/N2 selectivity of 16.8, higher than that of TF-COF (CO2/N2 selectivity 13.4).
CitationDas, N., Paul, R., Chatterjee, R., Shinde, D. B., Lai, Z., Bhaumik, A., & Mondal, J. (2022). Tuning of Microenvironment in Covalent Organic Framework via Fluorination Strategy promotes Selective CO2 Capture. Chemistry – An Asian Journal. Portico. https://doi.org/10.1002/asia.202200970
SponsorsN.D. &R.P. kindly acknowledge DST-INSPIRE New Delhi program (GAP-0881 andGAP-0799) for the financial support. This work was also financially aided by The Council of Scientific and Industrial Research (CSIR)-Young Scientist Award (YSA) (reference no. HRDG/YSA-19/02/21(0045)/2019) and CSIR-Focused Basic Research (CSIR-FBR) under the CLP theme (reference no. 34/1/TD-CLP/NCP-FBR 2020-RPPBDD-TMD-SeMI). J. M. is also grateful to DST for financial support under DST/TMD-EWO/AHFC-2021/2021/32 theme (GAP-0922). We also acknowledge the Director, CSIR-IICT (Ms. No.IICT/Pubs./2022/292).
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