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Protecting group and switchable pore-discriminating adsorption properties of a hydrophilic-hydrophobic metal-organic framework

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Author(s)

Mohamed Infas Haja Mohideen, Bo Xiao, Paul Stewart Wheatley, Alistair Craig McKinlay, Yang Li, Alexandra Martha Zoya Slawin, David William Aldous, Naomi F. Cessford, Tina Dueren, Xuebo Zhao, Rachel Gill, K. Mark Thomas, John Matthew Griffin, Sharon Elizabeth Ashbrook, Russell Edward Morris

School/Research organisations

Abstract

Formed by linking metals or metal clusters through organic linkers, metal-organic frameworks are a class of solids with structural and chemical properties that mark them out as candidates for many emerging gas storage, separation, catalysis and biomedical applications. Important features of these materials include their high porosity and their flexibility in response to chemical or physical stimuli. Here, a copper-based metal-organic framework has been prepared in which the starting linker (benzene-1,3,5-tricarboxylic acid) undergoes selective monoesterification during synthesis to produce a solid with two different channel systems, lined by hydrophilic and hydrophobic surfaces, respectively. The material reacts differently to gases or vapours of dissimilar chemistry, some stimulating subtle framework flexibility or showing kinetic adsorption effects. Adsorption can be switched between the two channels by judicious choice of the conditions. The monoesterified linker is recoverable in quantitative yield, demonstrating possible uses of metal-organic frameworks in molecular synthetic chemistry as 'protecting groups' to accomplish selective transformations that are difficult using standard chemistry techniques.

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Details

Original languageEnglish
Pages (from-to)304-310
Number of pages7
JournalNature Chemistry
Volume3
Issue number4
Early online date6 Mar 2011
DOIs
Publication statusPublished - Apr 2011

    Research areas

  • POROUS COORDINATION-POLYMER, CARBON MOLECULAR-SIEVES, NITRIC-OXIDE, GASES, STORAGE, VAPORS, NI-2(4,4'-BIPYRIDINE)(3)(NO3)(4), SELECTIVITY, SEPARATION, CHEMISTRY

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