Azido-mediated ferromagnetic exchange interaction in the M(II)-oxine complexes

摘要

We report the synthesis of ferromagnetically ordered mononuclear compounds [M(II)(oxine)(N_3)_x] containing different metal ions, via. M(II) = Co (1), Cr (2), Fe (3) and Ni (4), using azido as the main bridging ligand and oxine (8-hydroxy quinoline) as a new auxiliary ligand. Oxine was chosen because it is known to form a five-membered ring structure around the bivalent metal ions. A one-pot synthesis was carried out in each case. The compounds were characterised and their magnetic behaviour is studied. Ac susceptibility (X' and X'') measurements, hysteresis plots (VSM) and _XT behaviour indicate the onset of long-range ferromagnetic ordering below 18, 17, 9 and 34 K for the compounds 1, 2, 3 and 4, respectively.