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Title: A permanently porous single molecule H-bonded organic framework for selective CO2 capture
Chakraborty, Debanjan
Dept. of Chemistry
Keywords: Permanently porous
Single molecule
CO2 capture
Single tripodal tricarboxylic
Issue Date: May-2016
Publisher: Royal Society of Chemistry
Citation: Chemical Communications, 50(45), 7249-7252 .
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 sp3 nitrogen centre renders a near-propeller shape to the molecule generating an unusual ‘non-planar’ 3-D framework formed by highly directional planar –COOH⋯HOOC– hydrogen bonds, propagating in all three directions. The material shows exceptional hydrolytic, acidic and thermal stability and has a surface area of 1025 m2 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 CO2⋯CO2 dimers within the channels suggesting favorable co-operativity between them.
ISSN: 1359-7345
Appears in Collections:JOURNAL ARTICLES

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