New hyper-crosslinked partly conjugated networks with tunable composition by spontaneous polymerization of ethynylpyridines with bis(bromomethyl)arenes: Synthesis, spectral properties, and activity in CO2 capture

0422049 - ÚFCH JH 2014 RIV DE eng J - Článek v odborném periodiku
Petrášová, S. - Zukal, Arnošt - Brus, Jiří - Balcar, Hynek - Pastva, Jakub - Zednik, J. - Sedláček, J.
New hyper-crosslinked partly conjugated networks with tunable composition by spontaneous polymerization of ethynylpyridines with bis(bromomethyl)arenes: Synthesis, spectral properties, and activity in CO2 capture.
Macromolecular Chemistry and Physics. Roč. 214, č. 24 (2013), s. 2856-2866. ISSN 1022-1352. E-ISSN 1521-3935
Grant CEP: GA ČR(CZ) GAP108/11/1661
Institucionální podpora: RVO:61388955 ; RVO:61389013
Klíčová slova: CO2 capture * Conjugated polymers * ethynylpyridine
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie; CD - Makromolekulární chemie (UMCH-V)
Impakt faktor: 2.451, rok: 2013

Spontaneous catalyst-free polymerizations of 4-ethynylpyridine (4EPy) and 2-ethynylpyridine with bifunctional quaternizing agents (QAs) of bis(bromomethyl)arenes provide highly crosslinked polymer networks in high yields. 13C cross-polarization magic-angle spinning (CP/MAS) NMR, Fourier transform IR (FTIR) and diffuse reflectance vis spectroscopy confirm that these networks consist of polyacetylene main chains substituted with pyridyl and pyridiniumyl groups, the latter interconnected with -CH 2(arylene)CH2- linkers. Variation of the 4EPy/QA ratio in the polymerization feed results in networks with different extents of crosslinking and pyridyl/pyridiniumyl ratio (N/N+ from 0 to 1.32). Networks exhibit photoluminescence and are also moderately active in CO 2 capture (the highest uptake is 16.4 cm3 (STP) g -1 at 293 K and an equilibrium CO2 pressure of 750 Torr). Polymerizations of 4-, and 2-ethynylpyridine with bifunctional quaternizing agents of bis(bromomethyl)arenes provide highly crosslinked networks with polyacetylene main chains substituted by pyridyl and pyridiniumyl groups and crosslinked via -CH2(arylene)CH2- linkers. Depending on the synthesis conditions, the networks differ in crosslinking extent and pyridyl/pyridiniumyl ratio. The networks exhibit photoluminescence and CO 2 capture.
Trvalý link: http://hdl.handle.net/11104/0228305