Preprint Article Version 1 This version is not peer-reviewed

Synthesis of nitrogen-rich polymers by click polymerization reaction and gas sorption property

Version 1 : Received: 16 June 2018 / Approved: 19 June 2018 / Online: 19 June 2018 (10:53:12 CEST)

How to cite: Song, J.; Duan, W.; Li, D. Synthesis of nitrogen-rich polymers by click polymerization reaction and gas sorption property. Preprints 2018, 2018060294 (doi: 10.20944/preprints201806.0294.v1). Song, J.; Duan, W.; Li, D. Synthesis of nitrogen-rich polymers by click polymerization reaction and gas sorption property. Preprints 2018, 2018060294 (doi: 10.20944/preprints201806.0294.v1).

Abstract

Microporous organic polymers (MOPs) are promising materials for gas sorption because of the intrinsic and permanent porosity, designable framework and low density. The introduction of nitrogen-rich building block in MOPs will greatly enhance the gas sorption capacity. Here, we report the synthesis of MOPs from the 2,4,6-tris(4-ethynylphenyl)-1,3,5-triazine unit and aromatic azides linkers via click polymerization reaction. FTIR and solid state 13C CP-MAS NMR confirm the formation of the polymers. CMOP-1 and CMOP-2 exhibit microporous networks with BET surface area of 431 and 406 m2 g-1 and narrow pore size distribution under 1.2 nm. Gas sorption isotherms including CO2 and H2 were measured. CMOP-1 stores superior CO2 level of 8.2 wt% (1.88 mmol g-1) at 273 K/1.0 bar and H2 uptake up to 0.6 wt% at 77 K/1.0 bar, while CMOP-2 with smaller surface area shows lower CO2 adsorption capacity of 7.3 wt% (1.66 mmol g-1) and H2 uptake (0.5 wt%). In addition, I2 vapor adsorption was tested at 353 K. CMOP-1 shows higher gravimetric load of 160 wt%. Despite of the moderate surface area, the CMOPs display excellent sorption ability for CO2 and I2 due to the nitrogen-rich content in the polymers.

Subject Areas

microporous organic polymers; nitrogen-rich; CO2 adsorption; H2 adsorption; I2 vapor sorption

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