Triazine containing N-rich microporous organic polymers for CO 2 capture and unprecedented CO 2 /N 2 selectivity

Abstract

supplimentary information (ESI) available: BET specific surface area plot, thermal stability of SB-TRZ-CRZ and SB-TRZ-TPA, synthetic procedures, 13 C and 1 H NMR spectra. AbstractTargeted synthesis of microporous adsorbents for CO2 capture and storage is very challenging in the context of remediation from green house gases. Herein we report two novel N-rich microporous networks SB-TRZ-CRZ and SB-TRZ-TPA by extensive incorporation of triazine containing tripodal moiety in the porous polymer framework. These materials showed excellent CO2 storage capacities: SB-TRZ-CRZ displayed the CO2 uptake capacity of 25.5 wt% upto 1 bar at 273 K and SB-TRZ-TPA gave that of 16 wt% under identical conditions. The substantial dipole quadruple interaction between network (polar triazine) and CO2 boosts the selectivity for CO2/N2. SB-TRZ-CRZ has this CO2/N2 selectivity ratio of 377, whereas for SB-TRZ-TPA it was 97. Compared to other porous polymers, these materials are very cost effective, scalable and very promising material for clean energy application and environmental issues.2

Role of Surface Phenolic-OH Groups in N-Rich Porous Organic Polymers for Enhancing the CO2 Uptake and CO2/N2 Selectivity: Experimental and Computational Studies

“…The disappearance of the intense sharp aldehydic stretching peak at 1685 cm –1 for DFP, 1683 and 1650 cm –1 for the terephthaldehyde, along with −NH 2 deformation band of SL-1 between 1650 and 1660 cm –1 confirms the condensation reaction takes place between amine containing ligand and three aldehydes. The presence of a sharp IR band at 1540 cm –1 (characteristic band for triazine ring) in both the SL-1 monomer and in all three amine-linked materials indicates the completion of polycondensation reaction . The imine (−CN−) stretching band at 1620 cm –1 is absent, and presence of a very broad band at about 3417 cm –1 indicates the formation of three different polymer networks through −C–NH– bonding connection .…”

Porous Organic Polymers for CO2 Storage and Conversion Reactions

“…Bhunia et al. have carried out extensive incorporation of triazine containing tripodal building blocks in the POP frameworks during the oxidative polymerization of carbazole and triphenylamine, and the resulting porous polymers displayed CO 2 storage capacities of 25.5 and 16.0 wt% respectively (1 bar at 273 K) together with very high CO 2 /N 2 selectivities of 377 and 97, respectively . Yang et al.…”

Selective Carbon Dioxide Capture Using Silica‐Supported Polyaminals

“…The pore size of the materials shows that the broad peak starts from 4 nm of mesoporous range and ends at 1.2 nm of microporous range. These results revel that the Si‐PA‐1 and Si‐PA‐2 consists of both meso‐ and microporous materials . Total pore volume (V Tot ) of the Si‐PA‐1 and Si‐PA‐2 are estimated from the adsorbed amount of nitrogen at a relative pressure P/P 0 of 0.990, total pore volume (V Tot ) of both materials are of 0.188 cm 3 /g.…”