Systematic Investigation of the Effect of Polymerization Routes on the Gas-Sorption Properties of Nanoporous Azobenzene Polymers

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Functional-group-oriented polymerization strategies have contributed significantly to the initial development of porous polymers and have led to the utilization of several well-known organic transformations in the synthesis of these polymers. Because there are multiple polymerization routes that can be used to introduce the same chemical functionality, it is very important to demonstrate the effect of different polymerization routes on the gas-sorption properties of these chemically similar polymers. Herein, we have studied the rich chemistry of azobenzenes and synthesized four chemically similar nanoporous azobenzene polymers (NABs) with surface areas of up to 1021m(2)g(-1). The polymerization routes have a significant impact on the pore-size distributions of the NABs, which directly affects the temperature dependence of the CO2/N-2 selectivity. A pore-width maximum of 6-8 angstrom, narrow pore-size distribution, and small particle size (20-30nm) were very critical for high CO2/N-2 selectivity and N-2 phobicity, which is associated with azo linkages and realized at warm temperatures. Our findings collectively suggest that an investigation of different polymerization routes for the same chemical functionalization is critical to understand fully the combined effect of textural properties, local environment, and chemical functionalization on the gas-sorption properties of nanoporous polymers.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2015-10
Language
English
Article Type
Article
Citation

CHEMISTRY-A EUROPEAN JOURNAL, v.21, no.43, pp.15320 - 15327

ISSN
0947-6539
DOI
10.1002/chem.201501233
URI
http://hdl.handle.net/10203/205569
Appears in Collection
EEW-Journal Papers(저널논문)
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