Two Diammonium Copper Azides with Similar Layerlike Magnetic Substructures Made of Chains of Serially Connected Cu6 Rings Show Cation-Modulated Magnetism

Synthesis, crystal structure and magnetic properties of the complex [C(NH2)3]2[Mn(N3)4] with a polynuclear azido-bridged chain anion

A new complex [C(NH2)3]2[Mn(N3)4], in which MnII cations are alternatively bridged by double EE azide-bridges and the [Mn(N3)4]n 2− chains are separated by guanidinium cation bilayers, has been synthesized and characterized by single crystal X-ray diffraction, infrared (IR) spectroscopy, elemental analyses, and magnetic measurements. Magnetic susceptibility data indicate antiferromagnetic interaction among the MnII ions.

Diversified magnetic behaviors of new nickel(ii) and copper(ii) azido coordination polymers templated by diethyl or triethyl amines

The reactions of Ni^II or Cu^II ions with N₃⁻ anions in the presence of templated diethyl or triethyl amines afford three new azido-bridged coordination polymers, which exhibit metamagnetism, spin glass and canted ferromagnetism, respectively.

An azide-bridged copper(II) complex: poly[piperazine-1,4-dium [tetra-μ₃-azido-κ¹²N¹:N¹:N¹-hexa-μ₂-azido-κ¹²N¹:N¹-di-μ₂-azido-κ⁴N¹:N³-pentacopper(II)] tetrahydrate]

A new Cu(II)-azide complex, {(C4H12N2)[Cu5(N3)12]·4H2O}n, has been synthesized by the reaction of piperazine, Cu(OAc)2·2H2O (OAc is acetate) and NaN3. In the structure, μ2-1,1- and μ3-1,1,1-azide anions bridge five Cu(II) cations to form a linear pentanuclear cluster unit, which is further linked by μ2-1,1- and μ2-1,3-azide anions to form a two-dimensional condensed [Cu5(N3)12]n layer. The diprotonated piperazine and the solvent water molecules are hydrogen bonded to the coordination layers to form a three-dimensional supramolecular network.

A cyano and end-to-end azido bridged 3D copper(ii)–copper(i) mixed-valence coordination polymer and its transformation to copper nitride nanoparticles

Syntheses and characterization of a CN and end-to-end N₃ bridged three-dimensional Cu(II)–Cu(I) mixed valence polymer (1), with Cu-N₃ system without CN (2) and a CN-bridged Cu analogue without N₃ (3) are reported and solid-state transformation of the 1 to copper nitride nanoparticles performed.

catena-Poly[bis(dimethylazanium) [[chloridocopper(II)]-di-μ-chlorido-[chloridocopper(II)]-di-μ-azido-κ4N:N]]

The crystal structure of the title complex, {(C₂H₈N)[CuCl₂(N₃)]}_n, exhibits inorganic chains consisting of Cu(II) cations as well azide and chloride anions. The chains, made up from Cu—Cl—Cu—N—Cu linkages, are aligned parallel to the c axis. This architecture is further stabilized by a number of N—H⋯Cl hydrogen bonds involving the protonated charge-compensating dimethyl­amine cations and chloride atoms.

The azide-bridged mixed-valent cobalt(II,III) compound [(CH(3))(3)NH](2)[CoCo(2)(N(3))(10)]

The crystal structure of the title compound, poly[bis­(tri­methyl­ammonium) hexa-μ_1,1-azido-tetra­azido­tricobalt­ate(II,III)], [(CH₃)₃NH]₂[Co^IICo^III₂(N₃)₁₀], consists of anionic chains [Co^IICo^III₂(N₃)₁₀]²⁻ extending parallel to the c axis and [(CH₃)₃NH]⁺ counter-cations situated between the chains. In the anionic chain, one tetra­hedrally coordinated Co^II atom (site symmetry 2) and two octa­hedrally coordinated Co^III atoms are arranged alternately and are linked by μ_1,1-azide bridges. The anionic chains and cations are connected via N—H⋯N hydrogen bonding into a three-dimensional structure.

Formate-based magnetic metal-organic frameworks templated by protonated amines

A systematic study has been carried out on the 3d divalent metal formate 3D magnetic frameworks templated by protonated amines, and the achievements have revealed that metal formate frameworks are very malleable, and their structures depend on the size, shape, charge, and hydrogen bonding geometries of the templating cations. Six kinds of metal formate frameworks have been created. They are chiral frameworks with a (4(9) . 6(6)) topology, perovskite ones with a (4(12) . 6(3)) topology, bi-nodal frameworks of (4(12) . 6(3))(4(9) . 6(6))(n) (n = 1, 2, 3) topologies, and porous diamond frameworks with 6(6) topology. These materials display promising and abundant magnetic, dielectric, porous, and optical properties and the possible combination of them. Therefore, they are of great interest for the study of molecule-based materials. It has been demonstrated that formate, being the smallest and simplest carboxylate, cheap and with low toxicity, thus more biocompatible and environmentally friendly, and having been more or less ignored, will find an important role in the construction of molecule-based materials and provide new materials with interesting properties.