Three new supramolecular metal-coordination architectures [M(H2O)4(ampyz)2][M(H2O)6](SO4)2(H2O)2 (M = Co (1), Fe (2), and mixed Co/Fe (3); ampyz = 2-aminopyrazine) and a Cd(II) coordination polymer [Cd(ampyz)(H2O)2(SO4)]n(H2O)n (4) were synthesized by layered diffusion and structurally characterized. Compounds 1-3 are isomorphous. Monomeric complex units [M(H2O)4(ampyz)2]2+ are assembled by int...

A new tetradentate Schiff base (SB), (E)-4-fluoro-2-(1-((2-(piperazin-1-yl)ethyl)imino)ethyl)phenol, was synthesized from condensation of 2-(1-piperazinyl)ethylamine and 5-fluoro-2-hydroxyacetophenone. This ligand coordinated with three copper(II) salts (CuCl2, CuBr2 Cu(NO3)2?3H2O) separately, giving rise to neutral water-soluble Cu(II)/?4-NNNO complexes (1–3). The materials were fully characte...

A symmetric complex [NiL2(H2O)2]Cl2, where L = 2-picolylamine was synthesized and characterized by spectroscopic and structural methods. Single crystal X-ray studies reveal that the Ni(II) center located in a pseudo-octahedral N4O2 environment with bidentate ligands L positioned in basal and two water molecules in the apical position. The complex is solvatochromic, ionochromic and thermochromic...