Two-dimensional metal-organic frameworks: a system with competing chelating ligands

Keene, T.D., Hurstouse, M.B. and Price, D.J. (2009) Two-dimensional metal-organic frameworks: a system with competing chelating ligands. Crystal Growth and Design, 9(6), pp. 2604-2609. (doi: 10.1021/cg800769z)

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We report the synthesis, structure, and magnetism of two coordination polymers with a designed network topology. These isostructural materials are hydrothermally crystallized having a composition of M(en)(ox) (en = ethylenediamine, ox = oxalate, M = Co(II) 1 and Ni(II) 2). The structures show a rare bridging mode of ethylenediamine which links linear [M(ox)]∞ chains into an oblique two-dimensional network. Both compounds show antiferromagnetic interactions behaving as one-dimensional magnets. The magnetism of 1 is consistent with an S = 3/2 chain affected by spin−orbit coupling (g = 2.814(2), J/kB = −16.03(3) K, D/kB = 86.2(4) K), while 2 is a candidate Haldane antiferromagnet (g = 2.194(2), J/kB = −39.3(1), Eg/kB = 16.5 K). We discuss the use of models for S = 3/2 antiferromagnetic chains and present our own polynomial for Heisenberg S = 3/2 antiferromagnetic chains.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Price, Dr Daniel
Authors: Keene, T.D., Hurstouse, M.B., and Price, D.J.
Subjects:Q Science > QD Chemistry
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Crystal Growth and Design
ISSN (Online):1528-7505
Published Online:24 April 2009

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