Tuning the Structure and Magnetism of Heterometallic Sodium(1+)–Cobalt(2+) Formate Coordination Polymers by Varying the Metal Ratio and Solvents

Three new heterometallic formate coordination polymers formulated as [Na₂Co­(HCOO)₄]_∞ (<b>1</b>), [NaCo­(HCOO)₃]_∞ (<b>2</b>), and [Na₂Co₇(HCOO)₁₆]_∞ (<b>3</b>) were obtained by adjusting the solvent and ratio of the reactants. In <b>1</b>, a (4,4) cobalt formate layer is formed and the sodium ions connect the layers to form a three-dimensional (3D) framework. In <b>2</b>, each formate ligand binds two Co²⁺ and two Na⁺ ions with a syn,syn,anti,anti coordination mode to form a chrial network with 4,6-connected topology. <b>3</b> is a Na⁺-ion-linked 3D framework based on the cobalt formate layer, which has a 10-membered metal ring. Magnetic studies indicate the existence of ferromagnetic interactions between adjacent Co²⁺ ions in <b>1</b>, while dominating antiferromagnetic couplings in <b>2</b> and <b>3</b>

Two Cobalt-diphosphonates Templated by Long-Chain Flexible Amines: Synthesis, Structures, Proton Conductivity, and Magnetic Properties

Two new cobalt-diphosphonates templated by protonated 1,2-bis­(3-aminopropylamino)­ethane (BAPEN), (C₈N₄H₂₆)_0.5·[Co­(HEDP)]·H₂O (<b>1</b>) and (C₈N₄H₂₆)·[Co₂(HEDP)₂(H₂O)₂]·5H₂O (<b>2</b>), were hydrothermally prepared (HEDP = CH₃C­(OH)­(PO₃)₂, 1-hydroxyethylidenediphosphonate). Compounds <b>1</b> and <b>2</b> exhibit anionic 1D Co-HEDP chain and 2D Co-HEDP layer structure, respectively. The structure diversities from 1D chain to 2D layer was realized by adjusting the synthetic parameters. Their magnetism and proton conduction have been studied. Magnetic measurements indicated that the title compounds exhibit weak magnetic interactions. Compounds <b>1</b> and <b>2</b> feature a proton conductivity of 3.57 × 10^–4 and 9.43 × 10^–5 S cm^–1 at 100% relative humidity and 65 °C, respectively

3D Gd^III Complex Containing Gd₁₆ Macrocycles Exhibiting Large Magnetocaloric Effect

Hydrothermal synthesis of Gd₂O₃ and iminodiacetic acid (H₂IDA) yields a three-dimensional (3D) complex {[Gd₂(IDA)₃]·2H₂O}_<i>n</i> (<b>1</b>) including Gd₁₆ macrocycles. Magnetic investigation indicates the presence of weak antiferromagnetic interaction between Gd^III ions and a large magnetocaloric effect with −Δ<i>S</i>_m^max = 40.6 J kg^–1 K^–1

3D Inorganic Cuprous Iodide Open-Framework Templated by In Situ <i>N</i>‑Methylated 2,4,6-Tri(4-pyridyl)-1,3,5-triazine

A novel 3D inorganic cuprous iodide framework templated by in situ <i>N</i>-methylated 2,4,6-tri­(4-pyridyl)-1,3,5-triazine (TPT) was solvothermally prepared and structurally characterized. The title compound bearing chiral cuprous iodide chains as building units is the first 3D extended framework with the TPT-derivatives as template. The UV–vis diffuse-reflectance measurement reveals that <b>1</b> possesses semiconductor behavior with band gaps of 1.35 eV. The photoluminescent property of <b>1</b> has also been studied

3D Gd^III Complex Containing Gd₁₆ Macrocycles Exhibiting Large Magnetocaloric Effect

Hydrothermal synthesis of Gd₂O₃ and iminodiacetic acid (H₂IDA) yields a three-dimensional (3D) complex {[Gd₂(IDA)₃]·2H₂O}_<i>n</i> (<b>1</b>) including Gd₁₆ macrocycles. Magnetic investigation indicates the presence of weak antiferromagnetic interaction between Gd^III ions and a large magnetocaloric effect with −Δ<i>S</i>_m^max = 40.6 J kg^–1 K^–1

Synthesis and Magnetic Properties of a Series of Octanuclear [Fe₆Ln₂] Nanoclusters

The reaction of polydentate ligand Bis-tris propane {(CH₂OH)₃CNH­(CH₂)₃NHC­(CH₂OH)₃} with Ln­(NO₃)₃·6H₂O and Fe₃O precursor resulted in the formation of a series of Fe₆Ln₂ nanoclusters. Magnetic measurements indicate that the Fe₆ core exhibits ferrimagnetic behavior, and slow magnetic relaxation was observed in Fe₆Dy₂ and Fe₆Tb₂

Large Heterometallic Dy₁₂Na₆ Cage-like Cluster Supported by in Situ Generated Ligand

A novel heterometallic cluster, Dy₁₂Na₆, has been prepared and characterized. It represents an unprecedented high-nuclearity alkali-metal-Ln cluster with a cage-like shape. In situ generated ligands participated in the formation of the heterometallic cluster. Magnetic measurements suggest that Dy₁₂Na₆ shows slow magnetic relaxation at low temperature

A Spin-Canted Polynuclear Manganese Complex Comprised of Alternating Linkage of Cyclic Tetra-and Mononuclear Fragments

A polynuclear manganese complex composed of alternating cyclic tetramer and monomer has been solvothermally prepared and magnetically characterized. Magnetic analyses indicate that the title compound shows spin-canting behavior

A Spin-Canted Polynuclear Manganese Complex Comprised of Alternating Linkage of Cyclic Tetra-and Mononuclear Fragments

A polynuclear manganese complex composed of alternating cyclic tetramer and monomer has been solvothermally prepared and magnetically characterized. Magnetic analyses indicate that the title compound shows spin-canting behavior

An Unprecedented Decanuclear Gd^III Cluster for Magnetic Refrigeration

An unprecedented decanuclear Gd^III cluster composed of the [Gd₁₀(μ₃-OH)₈]²²⁺ core has been hydrothermally synthesized. Magnetic analyses indicate that this complex shows weak antiferromagnetic behavior with a relatively large magnetocaloric effect (−Δ<i>S</i>_m^max = 31.22 J kg^–1 K^–1)