<p>Covalent
organic Imine polymers with intrinsic meso-porosity were synthesized by
condensation reaction between 4,4-diamino diphenyl methane and (para/meta/ortho)-phthaladehyde.
Even though these polymers were synthesized from precursors of bis-bis covalent
link mode, the bulk materials were micrometer size particles with intrinsic
mesoporous enables nitrogen as well as carbon dioxide adsorption in the void
spaces. These polymers were showed stability up to 260<sup>o</sup> centigrade.
Nitrogen gas adsorption capacity up to 250 cc/g in the ambient pressure was observed
with type III adsorption characteristic nature. Carbon dioxide adsorption
experiments reveal the possible terminal amine functional group to carbamate with
CO<sub>2</sub> gas molecule to the polymers. One of the imine polymers, COP-3
showed more carbon dioxide sorption capacity and isosteric heat of adsorption
(Q<sub>st</sub>) than COP-1 and COP-2 at 273 K even though COP-3 had lower
porosity for nitrogen gas than COP-1 and COP-2. We explained the trends in gas
adsorption capacities and Qst values as a consequence of the intra molecular
interactions confirmed by Density Functional Theory computational experiments
on small molecular fragments.</p>
Selective Carbon Dioxide Capture in Antifouling Indole-based Microporous Organic Polymers
