Azo-bridged covalent porphyrinic polymers (Azo-CPPs): synthesis and CO2 capture properties?
RSC Advances Pub Date: 2015-11-05 DOI: 10.1039/C5RA17671A
Abstract
A series of azo-bridged, aromatic, nitrogen-rich, microporous covalent porphyrinic polymers (Azo-CPPs) were synthesized through a metal catalyst-free direct coupling of a kind of tetranitro building block, 4NO2TPP, and several diamine or tetraamine compounds, under basic conditions. The Azo-CPPs were all amorphous and exhibited surface areas between 197 to 591 m2 g?1. The effect of building blocks on the pore properties was discussed. Meanwhile, the capacity of adsorption of CO2 for all the Azo-CPPs was studied and the CO2 uptake capacity was between 7.36% and 9.22% at 273 K and 1.10 bar. The CO2/N2 selectivities were measured between 27.4–53.9 at 273 K and 31.2–107.8 at 303 K, respectively, showing an increase in selectivity with increasing temperature.
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Journal Name：RSC Advances
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CAS no.: 89640-58-4
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