Issue 6, 2011

Molecule-based magnetic materials based on dinuclear ruthenium carboxylate and octacyanotungstate

Abstract

Two structurally different polymeric complexes consisting of ruthenium(II,III) pivalate ([Ru2(piv)]4+) (Hpiv = pivalic acid) and octacyanotungstate(V) ([W(CN)8]3) ions, [{Ru2(piv)4}3W(CN)8(H2O)] (1) and (PPh4)2[Ru2(piv)4W(CN)8]·0.5H2O (2), were synthesized. The infrared spectra as well as diffused reflectance spectra confirmed the existence of the ruthenium(II,III) pivalate dimer in 1 and 2. The X-ray crystal structure analysis of 2 showed an alternating arrangement of [Ru2(piv)]4+ and [W(CN)8]3 ions in a one-dimensional chain. The temperature-dependent magnetic susceptibility of 2 showed a ferrimagnetic-like behavior. However, the field dependent magnetization curve at 2 K indicates that this complex has an S = 0 ground state. The X-ray crystal structure analysis of 1 showed a two-dimensional layered structure made up of windmill-shaped 28 membered-rings of alternating arrangement of [Ru2(piv)]4+ and [W(CN)8]3. The magnetic susceptibility and zero-field-cooled and field-cooled magnetization data of 1 showed that this complex is ferrimagnetic with Tc = 44 K. The field dependence of magnetization exhibited a hysteresis with a coercive field of 5600 Oe at 5 K.

Graphical abstract: Molecule-based magnetic materials based on dinuclear ruthenium carboxylate and octacyanotungstate

Supplementary files

Article information

Article type
Paper
Submitted
01 Nov 2010
Accepted
10 Jan 2011
First published
04 Feb 2011

New J. Chem., 2011,35, 1226-1233

Molecule-based magnetic materials based on dinuclear ruthenium carboxylate and octacyanotungstate

M. Mikuriya, D. Yoshioka, A. Borta, D. Luneau, D. Matoga, J. Szklarzewicz and M. Handa, New J. Chem., 2011, 35, 1226 DOI: 10.1039/C0NJ00855A

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