Eutectic Molten Salt Synthesis of Highly Microporous Macrocyclic Porous Organic Polymers for CO2 Capture

The development of porous materials is great interest for the capture CO2 from various emission sources, which essential to mitigate its detrimental environmental impact. In this direction, organic polymers (POPs) have emerged as prime candidates owing their structural tunability, physiochemical stability and high surface areas. an effort transfer intrinsic property a cyclotetrabenzoin-derived macrocycle—its affinity—into networks, herein we report synthesis three-dimensional (3D) macrocycle-based POPs through polycondensation octaketone macrocycle with phenazine-2,3,7,8-tetraamine hydrochloride. This was performed under ionothermal conditions, using eutectic salt mixture in temperature range 200 300 oC. resulting polymers, named 3D-mmPOPs, showed reaction temperature-dependent areas gas uptake properties. 3D-mmPOP-250 synthesized at 250 °C exhibited area up 752 m2 g−1 microporosity originating macrocyclic units, thus excellent binding enthalpy 40.6 kJ mol−1 capacities 3.51 mmol 273 K, 1.1 bar.