Porous materials with pre-designed single-molecule traps for CO2 selective adsorption

Jian-Rong Li, Jiamei Yu, Weigang Lu, Lin-Bing Sun, Julian Sculley, Perla B. Balbuena and Hong-Cai Zhou ()
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Jian-Rong Li: College of Environmental and Energy Engineering, Beijing University of Technology
Jiamei Yu: Materials Science and Engineering Program, Texas A&M University
Weigang Lu: Texas A&M University
Lin-Bing Sun: Texas A&M University
Julian Sculley: Texas A&M University
Perla B. Balbuena: Materials Science and Engineering Program, Texas A&M University
Hong-Cai Zhou: Texas A&M University

Nature Communications, 2013, vol. 4, issue 1, 1-8

Abstract: Abstract Despite tremendous efforts, precise control in the synthesis of porous materials with pre-designed pore properties for desired applications remains challenging. Newly emerged porous metal-organic materials, such as metal-organic polyhedra and metal-organic frameworks, are amenable to design and property tuning, enabling precise control of functionality by accurate design of structures at the molecular level. Here we propose and validate, both experimentally and computationally, a precisely designed cavity, termed a ‘single-molecule trap’, with the desired size and properties suitable for trapping target CO2 molecules. Such a single-molecule trap can strengthen CO2–host interactions without evoking chemical bonding, thus showing potential for CO2 capture. Molecular single-molecule traps in the form of metal-organic polyhedra are designed, synthesised and tested for selective adsorption of CO2 over N2 and CH4, demonstrating the trapping effect. Building these pre-designed single-molecule traps into extended frameworks yields metal-organic frameworks with efficient mass transfer, whereas the CO2 selective adsorption nature of single-molecule traps is preserved.

Date: 2013
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DOI: 10.1038/ncomms2552

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