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Microporous Hyper‐Cross‐Linked Polymers with High and Tuneable Content of Pyridine Units: Synthesis and Application for Reversible Sorption of Water and Carbon Dioxide
Author(s) -
Hašková Alena,
Bashta Bogdana,
Titlová Štěpánka,
Brus Jiří,
Vagenknechtová Alice,
Vyskočilová Eliška,
Sedláček Jan
Publication year - 2021
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.202100209
Subject(s) - pyridine , sorption , desorption , thermogravimetric analysis , mesoporous material , microporous material , polymer , magic angle spinning , materials science , chemical engineering , adsorption , relative humidity , polymer chemistry , chemistry , organic chemistry , composite material , nuclear magnetic resonance spectroscopy , catalysis , engineering , physics , thermodynamics
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 CO 2 and water. The homopolymer pyridine networks are highly efficient in the low‐pressure adsorption/desorption of CO 2 . This sorption mode is promising for the postcombustion removal of CO 2 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 13 C cross‐polarization magic angle spinning NMR, thermogravimetric analysis, and N 2 adsorption/desorption and their efficiency in CO 2 and H 2 O capturing is discussed in relation to the content and type of incorporated pyridine segments.