Inorganic Chemistry, Vol.49, No.24, 11325-11332, 2010
One Pot Synthesis of Heterometallic 3d-3d Azide Coordination Architectures: Effect of the Single-Ion Anisotropy
Five new isomorphic three-dimensional (3D) heterometallic 3d-3d azide complexes, [CuNi1-xCox(N-3)(2)(isonic)(2)](infinity) (x = 0 for 1, x = 0.3 for 2, x = 0.5 for 3, x = 0.6 for 4, and x = 1 for 5), were obtained by assembling Cu-II, M-II (Ni-II and Co-II), azide, and pyridyl carboxylate in hydrothermal condition. The 3D structure can be described as end on (EO) azide and syn,syn carboxylates mixed bridged alternate Cu-M chains linked by the pyridyl groups. Dominant ferromagnetic interactions were observed between the Cu-II and M-II ions in the chains. At low temperature diverse magnetic phenomena were presented in those complexes. As the Ni-II ions were replaced by Co-II ions with large anisotropy, the magnetism of the complexes change gradually from metamagnet to :single-chain magnet (SCM)-like behaviors.