Microporous hyper-cross-linked polymers with high and tuneable content of pyridine units: synthesis and application for reversible sorption of water and carbon dioxide

0544633 - ÚMCH 2022 RIV DE eng J - Journal Article
Hašková, A. - Bashta, B. - Titlová, Š. - Brus, Jiří - Vagenknechtová, A. - Vyskočilová, E. - Sedláček, J.
Microporous hyper-cross-linked polymers with high and tuneable content of pyridine units: synthesis and application for reversible sorption of water and carbon dioxide.
Macromolecular Rapid Communications. Roč. 42, č. 15 (2021), č. článku 2100209. ISSN 1022-1336. E-ISSN 1521-3927
R&D Projects: GA ČR(CZ) GA20-01233S
Institutional support: RVO:61389013
Keywords : CO2 adsorption * hyper-cross-linked polymers * polyacetylenes
OECD category: Polymer science
Impact factor: 5.006, year: 2021
Method of publishing: Limited access
https://onlinelibrary.wiley.com/doi/10.1002/marc.202100209

New hyper-cross-linked porous organic polymers (POPs) with a high content of pyridine segments (7.86 mmol pyridine g−1), and a micro/mesoporous texture are reported. The networks are achieved by the chain-growth homopolymerization of 2,6- and 3,5-diethynylpyridines. The pyridine segments form links interconnecting the polyacetylene main chains in these networks. The content of pyridine segments in the networks can be tuned by copolymerizing diethynylpyridines with 1,3-diethynylbenzene. The pyridine rings in the networks serve as base and hydrophilic centers for the sorption of CO2 and water. The homopolymer pyridine networks are highly efficient in the low-pressure adsorption/desorption of CO2. This sorption mode is promising for the postcombustion removal of CO2 from the fuel gas. The poly(3,5-diethynylpyridine) network exhibits high efficiency in capturing and releasing water vapor (determined capacity 376 mg g−1 at 298 K and relative humidity (RH) = 90% is one of the highest values reported for POPs) and is a promising material for the cyclic water harvesting from air. The reported networks are characterized by 13C cross-polarization magic angle spinning NMR, thermogravimetric analysis, and N2 adsorption/desorption and their efficiency in CO2 and H2O capturing is discussed in relation to the content and type of incorporated pyridine segments.
Permanent Link: http://hdl.handle.net/11104/0321966