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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.

Authors

Adrian J. Emerson

Marc Marshall

Gregory P. Knowles

Alan L. Chaffee

Stuart R. Batten

David R. Turner



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.

Acceptance Date Sep 11, 2018
Online Publication Date Sep 11, 2018
Publication Date Oct 9, 2018
Publicly Available Date Mar 28, 2024
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