Highly porous organic polymers bearing tertiary amine group and their exceptionally high CO2 uptake capacities

作者：Gomes Ruth; Bhaumik Asim^*

来源：Journal of Solid State Chemistry, 2015, 222: 7-11.

DOI：10.1016/j.jssc.2014.10.032

• CO2 storage materials
• Porous organic polymers
• Amine functionalization
• BET surface area
• Surface basicity

We report a very simple and unique strategy for synthesis of a tertiary amine functionalized high surface area porous organic polymer (POP) PDVTA-1 through the co-polymerization of monomers divinylbenzene (DVB) and triallylamine (TAA) under solvothermal reaction conditions. Two different PDVTA-1 samples have been synthesized by varying the molar ratio of the monomers. The porous polymeric materials have been thoroughly characterized by solid state C-13 CP MAS-NMR, FT-IR and UV-vis spectroscopy, N-2 sorption, HR TEM and FE SEM to understand its chemical environment, nanostructure, bonding, morphology and related surface properties. PDVTA-1 with higher amine content (DVB/TAA=4.0) showed exceptionally high CO2 uptake capacity of 85.8 wt% (19.5 mmol g(-1)) at 273 K and 43.69 wt% (9.93 mmol g(-1)) at 298 K under 3 bar pressure, whereas relatively low amine loaded material (DVB/TAA=7.0) shows uptake capacity of 59.2 wt% (13.45 mmol g(-1)) at 273 K and 34.36 wt% (7.81 mmol g(-1)) at 298 K. Highly porous nanostructure together with very high surface area and basicity at the surface due to the presence of abundant basic tertiary amine N-sites in the framework of PDVTA-1 could be responsible for very high CO2 adsorption.

• 出版日期2015-2