title: Amide functionalized microporous organic polymer (Am-MOP) for selective CO₂ sorption and catalysis.
abstract: We report the design and synthesis of an amide functionalized microporous organic polymer (Am-MOP) prepared from trimesic acid and p-phenylenediamine using thionyl chloride as a reagent. Polar amide (-CONH-) functional groups act as a linking unit between the node and spacer and constitute the pore wall of the continuous polymeric network. The strong covalent bonds between the building blocks (trimesic acid and p-phenylenediamine) through amide bond linkages provide high thermal and chemical stability to Am-MOP. The presence of a highly polar pore surface allows selective CO2 uptake at 195 K over other gases such as N2, Ar, and O2. The CO2 molecule interacts with amide functional groups via Lewis acid-base type interactions as demonstrated through DFT calculations. Furthermore, for the first time Am-MOP with basic functional groups has been exploited for the Knoevenagel condensation reaction between aldehydes and active methylene compounds. Availability of a large number of catalytic sites per volume and confined microporosity gives enhanced catalytic efficiency and high selectivity for small substrate molecules.
authors.affiliation: Molecular Materials Laboratory, ‡Molecular Simulations Laboratory, Chemistry & Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur-560064, Bangalore, Karnataka, India.
authors.forename: Venkata M
authors.initials: VM
authors.lastname: Suresh
authors.forename: Satyanarayana
authors.initials: S
authors.lastname: Bonakala
authors.forename: Hanudatta S
authors.initials: HS
authors.lastname: Atreya
authors.forename: Sundaram
authors.initials: S
authors.lastname: Balasubramanian
authors.forename: Tapas Kumar
authors.initials: TK
authors.lastname: Maji