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Gated Channels and Selectivity Tuning of CO 2 over N 2 Sorption by Post‐Synthetic Modification of a UiO‐66‐Type Metal–Organic Framework
Author(s) -
Kronast Alexander,
Eckstein Sebastian,
Altenbuchner Peter T.,
Hindelang Konrad,
Vagin Sergei I.,
Rieger Bernhard
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201602318
Subject(s) - thioether , selectivity , linker , sorption , metal organic framework , adsorption , thermal stability , diamine , chemistry , surface modification , materials science , combinatorial chemistry , polymer chemistry , organic chemistry , catalysis , computer science , operating system
The highly porous and stable metal–organic framework (MOF) UiO‐66 was altered using post‐synthetic modifications (PSMs). Prefunctionalization allowed the introduction of carbon double bonds into the framework through a four‐step synthesis from 2‐bromo‐1,4‐benzenedicarboxylic acid; the organic linker 2‐allyl‐1,4‐benzenedicarboxylic acid was obtained. The corresponding functionalized MOF (UiO‐66‐allyl) served as a platform for further PSMs. From UiO‐66‐allyl, epoxy, dibromide, thioether, diamine, and amino alcohol functionalities were synthesized. The abilities of these compounds to adsorb CO 2 and N 2 were compared, which revealed the structure–selectivity correlations. All synthesized MOFs showed profound thermal stability together with an increased ability for selective CO 2 uptake and molecular gate functionalities at low temperatures.