Issue 40, 2019

A new set of metal–organic frameworks synthesised from diisophthalate-based, 2′-phosphorus-substituted m-terphenyl linker molecules

Abstract

Four metal–organic frameworks employing the m-terphenyl diisophthalate linker molecule with 2′ substitution by P(V)-based functional groups of the central aryl have been synthesised. The dense packing of POMe2/PSMe2 functional groups within UHM-60/UHM-61 (UHM: University of Hamburg Materials) with an underlying net of ucp topology was overcome by increasing the sterical demand of phosphorus substituents. Replacement of the PEMe2 (E = O, S) functional groups by POEt2 or POPh2 gave UHM-62 and UHM-63, respectively, where valid deconstructions of the underlying topology to types 3,3,4,4T199, tim, and tst were found. The potential influence of the now-accessible phosphoryl functional group towards CO2 and CH4 adsorption as well as the selectivity towards CO2/CH4 separation was studied. Based on a comprehensive survey of literature-known Cu(II)-based MOFs with m-terphenyl-based linker molecules, we propose the deconstruction of inter-isophthalate plane angles to angular components of twist and fold allowing for the sophisticated classification of topologies that can be realised in Cu(II)-based MOFs using the m-terphenyl tetracarboxylate linker molecule.

Graphical abstract: A new set of metal–organic frameworks synthesised from diisophthalate-based, 2′-phosphorus-substituted m-terphenyl linker molecules

Supplementary files

Article information

Article type
Paper
Submitted
25 Jul 2019
Accepted
23 Sep 2019
First published
23 Sep 2019
This article is Open Access
Creative Commons BY-NC license

Dalton Trans., 2019,48, 15127-15135

A new set of metal–organic frameworks synthesised from diisophthalate-based, 2′-phosphorus-substituted m-terphenyl linker molecules

T. Stein, F. Hoffmann and M. Fröba, Dalton Trans., 2019, 48, 15127 DOI: 10.1039/C9DT03044A

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