Abstract
The solvo-thermal syntheses of [(CoSalphen)(2)Co (SCN)(2)] n (1), CoSalphen(NH3)(N-3)(2), Na[Co(III)salphen (N-3)(2)](3), Na[Co(III)salen(N-3)(2)](4) and CoIIIsalen(NH3)(N-3) (5) {salphen = N, N'-o-phenylene-bis(salicylideneimine)} are reported. The structural studies using X-ray diffraction measurements revealed that 1 crystalizes in a monoclinic C2/c space group. Two cobalt (II) metal centers in penta-coordinated and octahedral local coordination environments are bridged via alternating O and mu 1,3 SCN bridges resulting in a novel 2D layered coordination polymer. Compound 2 is a trivalent mononuclear cobalt azido complex with an octahedral coordination environment. The magnetic investigations of 1 revealed ferromagnetic coupling (J = +49.1 cm(-1)) and meta-magnetic ordering. Time resolved photoluminescence studies of the complexes showed excited state lifetimes of (tau(1) = 0.4675 ns, tau(2) = 5.23 ns) for 1 and (tau(1) = 0.5078 ns, tau(2) = 6.79 ns) for 2. (C) 2017 Elsevier B.V. All rights reserved.