Synthesis of Bifunctional Porphyrin Polymers for Catalytic Conversion of Dilute CO2 to Cyclic Carbonates
| Autor: | Qihua Yang, Sanjeevi Jayakumar, He Li, Li-Na Liu, Jian Chen, Can Li, Lin Tao |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Cycloaddition 0104 chemical sciences Catalysis chemistry.chemical_compound chemistry Nucleophile Polymer chemistry General Materials Science Epichlorohydrin Lewis acids and bases Propylene oxide 0210 nano-technology Selectivity Bifunctional |
| Zdroj: | ACS Applied Materials & Interfaces. 13:29522-29531 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.1c04624 |
| Popis: | Development of efficient solid catalysts for catalytic conversion of dilute CO2 is of extreme importance for carbon capture and utilization. We report the synthesis of bifunctional polymers co-incorporated with porphyrin-Zn as Lewis acid sites and Br- as nucleophiles for the cycloaddition of dilute CO2 with epoxides in this work. It was found that the Br-/Zn ratio has a volcano relation with the activity of bifunctional polymers in a cycloaddition reaction, indicating the synergy effect between Lewis acid sites and nucleophiles. The turnover frequency (TOF) of the bifunctional polymer is more than four-fold that of the physical mixture of tetrabutylammonium bromide and porphyrin-Zn-incorporated polymer, implying the enhanced cooperation between Br- and porphyrin-Zn in the polymer network. The bifunctional polymer with optimized Br-/Zn afforded 99% conversion, 99% selectivity, and a TOF as high as 12,000 h-1 for the cycloaddition of CO2 and propylene oxide, which is among the most active solid catalysts ever reported. Furthermore, the bifunctional polymer could efficiently catalyze the cycloaddition of epichlorohydrin with dilute CO2 (7.5% CO2 balanced by N2) even under ambient conditions, demonstrating its potential application in industrial-scale production. |
| Databáze: | OpenAIRE |
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