Issue 10, 2013
From the journal:

Journal of Materials Chemistry A

Synthesis of microporous organic polymers with high CO2-over-N2 selectivity and CO2 adsorption†

Chao Xua  and  Niklas Hedin*a  

* Corresponding authors

a Department of Materials and Environmental Chemistry, Berzelii Center EXSELENT on Porous Materials, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
E-mail: niklas.hedin@mmk.su.se
Fax: +46-8-152187
Tel: +46-8-162417

Abstract

A series of microporous organic polymers (MOPs) were synthesized by Schiff base condensation of 1,3,5-tris(4-aminophenyl)benzene and a number of dialdehyde monomers. The polymers were structurally characterized by in situ infrared and ex situ solid state 13C{1H} nuclear magnetic resonance (NMR) spectroscopy. Synthesis conditions were optimized to enhance CO2 uptake by the MOPs. Synthesis at low temperatures results in the MOPs being linked by imine groups. Heating of the MOPs reduces the number of imine groups and after heating to >300 °C nitrile groups were found to be present in the MOPs. The MOPs have specific surface areas up to 614 m2 g−1 and narrow pore size distributions of ∼4 to 8 Å. The selectivity of CO2-over-N2 at 273 K and 1 bar was 56–77, which requires either an influence of chemisorption on CO2 or a molecular sieving (or kinetic selection) of CO2-over-N2. The materials had also heats of adsorption typical for physisorption of CO2.

Graphical abstract: Synthesis of microporous organic polymers with high CO2-over-N2 selectivity and CO2 adsorption

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Article information

DOI
https://doi.org/10.1039/C3TA01160G
Article type
Paper
Submitted
19 Nov 2012
Accepted
09 Jan 2013
First published
09 Jan 2013

J. Mater. Chem. A, 2013,1, 3406-3414

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Synthesis of microporous organic polymers with high CO2-over-N2 selectivity and CO2 adsorption

C. Xu and N. Hedin, J. Mater. Chem. A, 2013, 1, 3406 DOI: 10.1039/C3TA01160G

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