A high-connectivity approach to a hydrolytically stable Metal-Organic Framework for CO2 capture from flue gas

Emerson, Adrian J.; Hawes, Chris S.; Marshall, Marc; Knowles, Gregory P.; Chaffee, Alan L.; Batten, Stuart R.; Turner, David R.

Abstract

A CdII-based metal-organic framework (MOF) demonstrates that incorporation of a ligand with high-connectivity yields a material with remarkable hydrolytic stability that is able to capture CO2 un-der simulated industrial flue gas conditions. A novel triaminepenta-carboxylic acid ligand, isolated as its trihydrochloride salt N,N"-di(4-carboxybenzyl)-N,N',N"-tri(acetic acid)-2,2'-diaminodiethylamine trihydrochloride (H8L1)Cl3, has been pre-pared, characterised and subsequently used in the formation of poly-[Cd2.5(L1)(OH2)]·DMF·4H2O, a highly connected three-dimensional network, with 12 out of 13 donor atoms coordinating per ligand. After solvent exchange it was found that 1 absorbed 170 cm3(STP)/g of N2 at 77 K and 66 cm3(STP)/g of CO2 at 273 K. Hydrolytic experiments performed on 1 demonstrated that the ma-terial completely retained crystallinity after being immersed in boil-ing water for 72 hours, as well as after being exposed to a simulat-ed flue gas stream at 150 °C.

Citation

Emerson, A. J., Hawes, C. S., Marshall, M., Knowles, G. P., Chaffee, A. L., Batten, S. R., & Turner, D. R. (2018). A high-connectivity approach to a hydrolytically stable Metal-Organic Framework for CO2 capture from flue gas. Chemistry of Materials, 6614-6618. https://doi.org/10.1021/acs.chemmater.8b03060

• Acceptance Date: Sep 11, 2018
• Online Publication Date: Sep 11, 2018
• Publication Date: Oct 9, 2018
• Publicly Available Date: May 26, 2023
• Journal: Chemistry of Materials
• Print ISSN: 0897-4756
• Publisher: American Chemical Society
• Pages: 6614-6618
• DOI: https://doi.org/10.1021/acs.chemmater.8b03060
• Publisher URL: http://doi.org/10.1021/acs.chemmater.8b03060