Crystal growth and magnetic properties of the copper coordination polymer [Cu(μ-C2O4)(4-aminopyridine)2(H2O)]n by A. V. Prokoﬁev, W. Assmus, K. Remović-Langer, V. Pashchenko, Y. Tsui, B. Wolf, and M. Lang

Crystal Research and Technology

Cryst. Res. Technol. 42, 394 (2007) - Abstract -

Crystal growth and magnetic properties of the copper coordination polymer [Cu(μ-C₂O₄)(4-aminopyridine)₂(H₂O)]_n

A. V. Prokoﬁev, W. Assmus, K. Remović-Langer, V. Pashchenko, Y. Tsui, B. Wolf, and M. Lang

Physikalisches Institut, J. W. Goethe-Universität, Max-von-Laue-Str. 1, 60438 Frankfurt am Main, Germany

Keywords	single crystals, coordination polymer, spin-1/2 chain
PACS	81.10.Dn, 75.10.Pq, 71.20.Rv
DOI	10.1002/crat.200610834

In this paper, we consider various ways of crystal growth of the polymer [Cu(μ-C₂O₄)(4-aminopyridine)₂(H₂O)]_n. Single crystals of the size of 1.5x1.5x0.2 mm³ have been grown by a slow diffusion technique from solutions of the monoammine copper complex and of the mixture of potassium oxalate and aminopyridine with the stoichiometric ratio. Magnetic susceptibility and ESR measurements have been performed on single crystals large enough for investigating anisotropic properties. The susceptibility can be well described within the model of a Heisenberg antiferromagnetic spin chain. The magnetic measurements reveal a small concentration of paramagnetic moments reflecting the high quality of the single crystals.

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