Issue 45, 2013

M(ii) (M = Mn, Co, Ni) variants of the MIL-53-type structure with pyridine-N-oxide as a co-ligand

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.

Graphical abstract: M(ii) (M = Mn, Co, Ni) variants of the MIL-53-type structure with pyridine-N-oxide as a co-ligand

Supplementary files

Article information

Article type
Paper
Submitted
28 Jūn. 2013
Accepted
06 Aug. 2013
First published
14 Aug. 2013

CrystEngComm, 2013,15, 9679-9687

M(II) (M = Mn, Co, Ni) variants of the MIL-53-type structure with pyridine-N-oxide as a co-ligand

A. S. Munn, G. J. Clarkson, F. Millange, Y. Dumont and R. I. Walton, CrystEngComm, 2013, 15, 9679 DOI: 10.1039/C3CE41268G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements