Porous solids offer reversible capture/release and safe operations at high temperatures, while retaining their structural integrity, and thermal and chemical stability, in addition to their gas selectivity. Most existing porous materials, however, suffer from water instability, not to mention the difficulty to tune their structures or the lack of sustainable synthesis, owing to the use of rare earth catalysts. We have recently reported [1,2] a family of water stable, azo-bridged, nitrogen-rich, aromatic, azo-linked porous polymers , which can be synthesized by catalyst-free direct coupling of aromatic nitro and amine moieties under basic conditions. These polymers were found to be stable in boiling water for a week. Unlike other porous materials, these azo-linked polymers exhibit an unprecedented increase in CO2/N2 selectivity with rise in temperature. We have demonstrated that by varying the constitution and structures of organic linkers, gas uptake properties of these porous polymers can be controlled. In addition, we have also investigated the effect of different polymerization routes, which presents different kinetic pathways and reactive intermediates, on the gas sorption properties of azo-linked porous polymers. Effect of charged subunits on the CO2 and H2 uptake properties of covalent amorphous polymers is also investigated.References:  1. H. A. Patel, S. H. Je, J. Park, D. P. Chen, Y. Jung, C. T. Yavuz and A. Coskun, Nature Commun., 2013 , 4, 1357. 2. H. A. Patel, S. H. Je, J. Park, Y. Jung, A. Coskun, and C. T. Yavuz, Chem. Eur. J., 2014 , 20 772�780.

Directing structural features and gas sorption properties of covalent amorphous polymers

248th National Meeting (2014)

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