A new Co(ii) metal-organic framework with enhanced CO2 adsorption and separation performance

Xiao Ting Liu, Yan Yuan Jia, Ying Hui Zhang, Guo Jian Ren, Rui Feng, Shi Yu Zhang, Michael J. Zaworotko, Xian He Bu

Research output: Contribution to journalArticlepeer-review

Abstract

The new functional ligand 5-(1H-pyrazole-4-carboxamido)isophthalic acid (H3L) reacts with CoSO4·7H2O to form a new three-dimensional metal-organic framework, [Co4(HL2-)4(DMF)2(H2O)2]n·solvent (1) with a new (3,6)-connected topology. 1 exhibits one-dimensional polar channels with approximate dimensions of 6.0 × 8.0 Å2 decorated with accessible functional sites. These sites contribute to enhanced CO2 uptake (103.2 cm3 g-1 at 273 K and 1 bar) and CO2/CH4 selectivity (7.25 for CO2/CH4 = 50:50; 8.59 for CO2/CH4 = 5:95) at 298 K and 1 bar. DFT calculations were also performed to elucidate the binding sites. These results suggest that complex 1 is an attractive candidate for CO2 adsorption and separation.

Original languageEnglish
Pages (from-to)1510-1515
Number of pages6
JournalInorganic Chemistry Frontiers
Volume3
Issue number12
DOIs
Publication statusPublished - 2016

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