Triazine-functionalized highly ordered hierarchically porous organic polymer with high CO2 uptake capacity and catalytic activity for microwave-assisted Knoevenagel condensation reaction

Abstract

We report a new hierarchical meso-microporous organic co-polymer PDVTAT-1, synthesized using P123 as structure directing agent to produce ordered 2D hexagonal mesopores along with the in-built micropores by utilizing 2,4,6-triallyloxy-1,3,5-triazine and divinylbenzene monomers. The reaction was progressed via solvothermal radical polymerization using AIBN reaction initiator. A thorough characterization of the polymer was conducted employing powder X-ray diffraction study, N2 sorption, 13C CP MAS NMR, FT-IR and UV–vis spectroscopy, FE-SEM, HR-TEM, Thermogravimetric, CHN, and CO2 TPD-TCD analysis. Having a surface area of 1016 m2 g−1, surface basicity of 1.17 mmol g−1 and pore diameters of 1.54 nm (micropore) and 3.29 nm (mesopore), the polymer exhibited significantly good CO2 uptake capacities of 1.07 mmol g−1 and 5.75 mmol g−1 at 298 and 273 K temperature, respectively up to 1.0 bar pressure, with the heat of adsorption (Qst) value 48.74 kJ mol−1. Also, PDVTAT-1 was used as a reusable heterogeneous base catalyst for solvent-free Knoevenagel condensation reaction.