title: Syntheses, crystal structures, and magnetic properties of metal-organic hybrid materials of Cu(II): effect of a long chain dicarboxylate backbone, and counteranion in their structural diversity.
abstract: Eight new metal-organic hybrid materials of Cu(II) have been synthesized by using flexible glutarate/adipate as a bridging ligand, 2,2'-bipyridine/1,10-phenanthroline as a chelating ligand, and BF4-/ClO4-/Cl- as a counteranion. These materials are characterized by single-crystal X-ray diffraction analyses and variable temperature magnetic measurements. Out of them, complexes 1, 3, 5, and 8 crystallize in the triclinic system with space group P. Complexes 2, 4, 6, and 7 crystallize in the monoclinic system with space group P21/n (2, 4), P21/c (6), and C2 (7). The structural analysis reveals that bridging glutarate gives rise to dinuclear and tetranuclear species, whereas the adipate dianion leads to octanuclear, one-dimensional and two-dimensional polymeric complexes, although they have been prepared under similar conditions. Supramolecular architectures of higher dimensionality have been achieved through H-bonding and pi-pi interaction. In all the complexes, the bridging and/or counteranions as well as chelating ligand have a vital role in directing the solid-state structure. A variable temperature (2-300 K) magnetic susceptibility study discloses the antiferromagnetic coupling for all of the complexes.
authors: Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata, India.
authors: A K
authors: AK
authors: Ghosh
authors: D
authors: D
authors: Ghoshal
authors: E
authors: E
authors: Zangrando
authors: J
authors: J
authors: Ribas
authors: N Ray
authors: NR
authors: Chaudhuri
mesh_terms: D015082:2,2'-Dipyridyl / Q000737:chemistry*; D000838:Anions / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D003460:Crystallization; D018360:Crystallography, X-Ray; D008024:Ligands; D008280:Magnetics; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry; D010618:Phenanthrolines / Q000737:chemistry*; D013696:Temperature
chemical_list: D000838:Anions; D008024:Ligands; D009942:Organometallic Compounds; D010618:Phenanthrolines; D015082:2,2'-Dipyridyl; D003300:Copper; C025205:1,10-phenanthroline