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M(ii) (M = Mn, Co, Ni) variants of the MIL-53-type structure with pyridine-N-oxide as a co-ligand
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Munn, Alexis S., Clarkson, Guy J., Millange, Franck, Dumont, Yves and Walton, Richard I. (2013) M(ii) (M = Mn, Co, Ni) variants of the MIL-53-type structure with pyridine-N-oxide as a co-ligand. CrystEngComm, Volume 15 (Number 45). pp. 9679-9687. doi:10.1039/c3ce41268g ISSN 1466-8033.
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Official URL: http://dx.doi.org/10.1039/c3ce41268g
Abstract
The synthesis and structures of metal–organic framework materials with three-dimensional structures related to the well-known MIL-53 framework are described. These have general chemical formula M(BDC)(PNO), where BDC = 1,4-benzenedicarboxylate, PNO = pyridine-N-oxide, and M = Mn, Co or Ni. The materials contain infinite chains of octahedral metal centres connected by trans corner sharing and cross-linked by 1,4-benzenedicarboxylate anions, where the bridging oxygen atoms in the inorganic chains belong to pyridine-N-oxide ligands. The pyridine rings of these additional ligands project into the extra-framework space, rendering the structure non-porous. The metal ions are present in the +2 oxidation state, as verified using XANES spectroscopy for the case of M = Co. Solid solutions M11−xM2x(BDC)(PNO) can be prepared, which is confirmed using high resolution powder X-ray diffraction. Magnetic susceptibility measurements show antiferromagnetic behaviour at low temperatures for M = Ni or Mn, whereas for M = Co there is evidence for low temperature ferromagnetic interactions. The mean effective magnetic moments deduced per metal ion are consistent with the +2 oxidation states in octahedral coordination.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||
| Journal or Publication Title: | CrystEngComm | ||||
| Publisher: | Royal Society of Chemistry | ||||
| ISSN: | 1466-8033 | ||||
| Official Date: | 2013 | ||||
| Dates: |
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| Volume: | Volume 15 | ||||
| Number: | Number 45 | ||||
| Page Range: | pp. 9679-9687 | ||||
| DOI: | 10.1039/c3ce41268g | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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