Influence of the Amide Groups in the CO2/N2 Selectivity of a Series of Isoreticular, Interpenetrated Metal-Organic Frameworks

Here we report the use of a pillaring strategy for the design and synthesis of three novel amide-functionalized metal-organic frameworks (MOFs), TMUs-22/-23/-24, isoreticular to the recently reported imine-functionalized TMU-6 and TMU-21 MOFs. An extensive study of their CO sorption properties and s...

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Bibliographic Details
Authors: Safarifard, Vahid|||0000-0003-4876-8257, Rodríguez-Hermida, Sabina|||0000-0001-7671-9925, Guillerm, Vincent|||0000-0003-3460-223X, Imaz, Inhar|||0000-0002-0278-1141, Bigdeli, Mina, Tehrani, Alireza Azhdari, Juanhuix, Judith|||0000-0003-3728-8215, Morsali, Ali|||0000-0002-1828-7287, Casco, Mirian E., Silvestre Albero, Joaquín, Ramos Fernández, Enrique V., Maspoch Comamala, Daniel|||0000-0003-1325-9161
Format: article
Publication Date:2016
Country:España
Institution:Universitat Autònoma de Barcelona
Repository:Dipòsit Digital de Documents de la UAB
Language:English
OAI Identifier:oai:ddd.uab.cat:216241
Online Access:https://ddd.uab.cat/record/216241
https://dx.doi.org/urn:doi:10.1021/acs.cgd.6b01054
Access Level:Open access
Keyword:Amide groups
Breakthrough experiment
Functionalized
Gas sorption isotherms
Metal organic framework
Metalorganic frameworks (MOFs)
Sorption properties
Description
Summary:Here we report the use of a pillaring strategy for the design and synthesis of three novel amide-functionalized metal-organic frameworks (MOFs), TMUs-22/-23/-24, isoreticular to the recently reported imine-functionalized TMU-6 and TMU-21 MOFs. An extensive study of their CO sorption properties and selectivity for CO over N, from single gas sorption isotherms to breakthrough measurements, revealed that not only the incorporation of amide groups but also their accessibility is crucial to obtain enhanced CO sorption and CO/N selectivity. Therefore, the MOF with more accessible amide groups (TMU-24) shows a CO/N selectivity value of ca. 10 (as revealed by breakthrough experiments), which is ca. 500% and 700% of the selectivity values observed for the other amide-containing (TMU-22 and TMU-23) and imine-containing (TMU-6 and TMU-21) MOFs.

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