A Three-Dimensional Complex with a One-Dimensional Cobalt-Hydroxyl Chain Based on Planar Nonanuclear Clusters Showing Spin-Canted Antiferromagnetism

A new three-dimensional magnetic
network, [Co9(OH)6(C42H24O18P3N3)2(H2O)8] (1), has been successfully prepared
by utilizing the flexible hexacarboxylate ligand derived from cyclotriphosphazene,
which had been characterized by single-crystal X-ray diffraction and
magnetic measurement. This compound consists of one-dimensional (1D)
cobalt-hydroxyl chains based on planar nonanuclear clusters, which
are located in the b–c plane to form the nearly
two-dimensional cobalt layer. Magnetic measurements reveal that 1 shows spin-canted antiferromagnetism with spin-glass behavior.
These results suggest that reasonable design and choice of large carboxylate
ligand based on a specific scaffold could be effective for the construction
of magnetic materials based on a novel 1D magnetic chain.