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.

Autor:	Petrášová, Sabina, Zukal, Arnošt, Brus, Jiří, Balcar, Hynek, Pastva, Jakub, Zedník, Jiří, Sedláček, Jan
Předmět:	POLYMERIZATION research CHEMICAL reactions PYRIDINE HETEROCYCLIC compounds AROMATIC compounds
Zdroj:	Macromolecular Chemistry & Physics; Dec2013, Vol. 214 Issue 24, p2856-2866, 11p
Abstrakt:	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 -CH2(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 CO2 capture (the highest uptake is 16.4 cm3 (STP) g−1 at 293 K and an equilibrium CO2 pressure of 750 Torr). [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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