Issue 12, 2001
From the journal:

Journal of the Chemical Society, Dalton Transactions

Synthesis, structural relationships and magnetic properties of new amine-templated manganese(II) phosphate oxalate framework materials

Zoe A. D. Lethbridge,a   Satish K. Tiwary,b   Andrew Harrisonb  and  Philip Lightfoot*a  

* Corresponding authors

a School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife, UK
E-mail: pl@st-andrews.ac.uk

b Department of Chemistry, University of Edinburgh, The King’s Buildings, West Mains Road, Edinburgh, UK

Abstract

Three novel three-dimensional framework materials in the manganese(II)–phosphate–oxalate system have been prepared hydrothermally using organic amines as structure-directing agents. [H3NC6H10NH3][Mn2(HPO4)2(C2O4)(H2O)2] 1 and [H3N(CH2)2NH3][Mn2(HPO4)2(C2O4)(H2O)2] 2 have related, but not isomorphous, structures based on layers of vertex-sharing MnO6 and PO4 polyhedra linked by bridging oxalate groups. [H3N(CH2)2NH3][Mn4(HPO4)2(C2O4)3(H2O)2]·2H2O 3 has a very different structure composed of edge-sharing dimeric MnO6 units linked into chains by PO4 groups, and into a 3-D framework by oxalate units. 3 can be topotactically dehydrated, with loss of both extra-framework and co-ordinated water, to produce a new phase 4. The magnetic susceptibilities of phases 1, 3 and 4 all show Curie–Weiss behaviour above about 50 K, and a maximum in the susceptibility curve in the vicinity of 7–12 K, indicating significant antiferromagnetic exchange. Structural relationships to other phosphate–oxalate frameworks are discussed.

Graphical abstract: Synthesis, structural relationships and magnetic properties of new amine-templated manganese(II) phosphate oxalate framework materials

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Article information

DOI
https://doi.org/10.1039/B101005K
Article type
Paper
Submitted
30 Jan 2001
Accepted
03 May 2001
First published
29 May 2001

J. Chem. Soc., Dalton Trans., 2001, 1904-1910

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Synthesis, structural relationships and magnetic properties of new amine-templated manganese(II) phosphate oxalate framework materials

Z. A. D. Lethbridge, S. K. Tiwary, A. Harrison and P. Lightfoot, J. Chem. Soc., Dalton Trans., 2001, 1904 DOI: 10.1039/B101005K

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