Issue 45, 2013

Using hinged ligands to target structurally flexible copper(ii) MOFs

Abstract

Here we report two new flexible MOFs based on a bis-pyrazolylmethane ‘hinged’ link design that favours the formation of two distinct structural nodes within the resulting 2-D and 3-D structures. The less sterically demanding ligand H2bcppm affords a 2-D layered MOF, {Cu2[CuII(NO3)2(bcppm)2](DMF)2}·2DMF (1), constructed from copper(II) paddlewheel and mononuclear octahedral copper(II) nodes. The use of a more sterically encumbered tetramethyl analogue H2bcpdmpm induces a dramatic twisting of the ligand backbone that yields a 3-D MOF{Cu4[CuI(bcpdmpm)2]2(EtOH)2(H2O)2}(NO3)2·12DMF (2) formed from a very similar mix of nodes, specifically copper(II) paddlewheel clusters and mononuclear tetrahedrally coordinated copper(I) centres. Herein we describe the crystal structures, solid-state flexibility, and gas adsorption properties of both materials.

Graphical abstract: Using hinged ligands to target structurally flexible copper(ii) MOFs

Supplementary files

Article information

Article type
Paper
Submitted
27 juin 2013
Accepted
23 août 2013
First published
23 août 2013

CrystEngComm, 2013,15, 9663-9671

Using hinged ligands to target structurally flexible copper(II) MOFs

W. M. Bloch, C. J. Doonan and C. J. Sumby, CrystEngComm, 2013, 15, 9663 DOI: 10.1039/C3CE41244J

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