Aqueous and Template‐Free Synthesis of Meso–Macroporous Polymers for Highly Selective Capture and Conversion of Carbon Dioxide. Issue 21 (13th October 2017)

• Record Type: Journal Article
• Authors: Huang, Kuan; Liu, Fujian; Jiang, Lilong; Dai, Sheng
• Is Part Of: ChemSusChem. Volume 10:Issue 21(2017)
• Page Start: 4144
• Page End: 4149
• Publication Date: 2017-10-13
• Subjects: carbon dioxide capture -- carbon dioxide conversion -- meso-macropores -- nitrogen functionality -- porous organic polymers; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201701666
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: Meso–macroporous polymers possessing nitrogen functionality were innovatively synthesized through an aqueous and template‐free route herein. Specifically, the polymerization of 1‐(4‐vinylbenzyl)‐1, 3, 5, 7‐tetraazaadamantan‐1‐ium chloride in aqueous solution under high temperatures induces the decomposition of the hexamethylenetetramine unit into ammonia and formaldehyde molecules, followed by the cross‐linking of benzene rings through "resol chemistry". During this process, extended meso–macroporous frameworks were constructed, and active nitrogen species were incorporated. Taking the advantage of the meso–macroporosity and nitrogen functionality, the synthesized polymers offer competitive CO2 capacities (0.37–1.58 mmol g −1 at 0 °C and 0.15 bar) and outstanding CO2 /N2 selectivities (155–324 at 0 °C). Furthermore, after complexed with metal ions, the synthesized polymers show excellent activity for catalyzing the cycloaddition of propylene oxide with CO2 (yield>98.5 %, turnover frequency: 612.9–761.1 h −1 ). Abstract : Simple yet good : Nitrogen‐functionalized meso–macroporous polymers were synthesized through a facile, aqueous, and template‐free route, starting from readily available reagents. They are found to have competitive CO2 capacities and outstanding CO2 /N2 selectivities as well as excellent performance for the catalytic cycloaddition of propylene oxide with CO2 after metalation.