Porous Metal-Organic Polyhedral Framework containing Cuboctahedron Cages as SBUs with High Affinity for H2 and CO2 Sorption: A Heterogeneous Catalyst for Chemical Fixation of CO2

Kartik Maity; Chandan Kumar Karan; Kumar Biradha

doi:10.1002/chem.201802829

Porous Metal-Organic Polyhedral Framework containing Cuboctahedron Cages as SBUs with High Affinity for H₂ and CO₂ Sorption: A Heterogeneous Catalyst for Chemical Fixation of CO₂

Chemistry. 2018 Aug 1;24(43):10988-10993. doi: 10.1002/chem.201802829. Epub 2018 Jul 3.

Authors

Kartik Maity¹, Chandan Kumar Karan¹, Kumar Biradha¹

Affiliation

¹ Department of Chemistry, Indian Institute of Technology, Kharagpur, 721302, India.

PMID: 29888814
DOI: 10.1002/chem.201802829

Abstract

Development of active porous materials that can efficiently adsorb H₂ and CO₂ is needed, due to their practical utilities. Here we present the design and synthesis of an interpenetrated Cu^II metal-organic framework (MOF) that is thermally stable, highly porous and can act as a heterogeneous catalyst. The Cu^II -MOF contains a highly symmetric polyhedral metal cluster (Cu₂₄ ) with cuboctahedron geometry as secondary building unit (SBU). The double interpenetration of such huge cluster-containing nets provides a high density of open metal sites, due to which it exhibits remarkable H₂ storage capacity (313 cm³ g^-1 at 1 bar and 77 K) as well as high CO₂ capture ability (159 cm³ g^-1 at 1 bar and 273 K). Further, its propensity towards CO₂ sorption can be utilized for the heterogeneous catalysis of the chemical conversion of CO₂ into the corresponding cyclic carbonates upon reaction with epoxides, with high turnover number and turnover frequency values.

Keywords: carbon dioxide capture; carbon dioxide fixation; hydrogen storage; metal organic polyhedral framework; stability.