title: A permanently porous single molecule H-bonded organic framework for selective CO2 capture.
abstract: Permanent porosity has been realized in a hydrogen bonded framework formed by a single tripodal tricarboxylic acid molecule. The presence of three phenyl rings linked to a flexible sp(3) nitrogen centre renders a near-propeller shape to the molecule generating an unusual 'non-planar' 3-D framework formed by highly directional planar -COOHHOOC- hydrogen bonds, propagating in all three directions. The material shows exceptional hydrolytic, acidic and thermal stability and has a surface area of 1025 m(2) g(-1). Importantly, it shows preferential adsorption of CO2 over N2 with very high selectivities (350 : 1@1 bar, 303 K). DFT modeling shows the presence of stable T-shaped CO2CO2 dimers within the channels suggesting favorable co-operativity between them.
authors.affiliation: Department of Chemistry, Indian Institute of Science Education and Research, Dr Homi Bhabha Rd. Pashan, Pune, 411008, India.
authors.forename: Shyamapada
authors.initials: S
authors.lastname: Nandi
authors.affiliation: Department of Chemistry, Indian Institute of Science Education and Research, Dr Homi Bhabha Rd. Pashan, Pune, 411008, India.
authors.forename: Debanjan
authors.initials: D
authors.lastname: Chakraborty
authors.affiliation: Department of Chemistry, Indian Institute of Science Education and Research, Dr Homi Bhabha Rd. Pashan, Pune, 411008, India and Centre for Energy Science, Indian Institute of Science Education and Research, Dr Homi Bhabha Rd. Pashan, Pune, 411008, India. vaidhya@iiserpune.ac.in.
authors.forename: Ramanathan
authors.initials: R
authors.lastname: Vaidhyanathan