Abstract:Sr 2 NiO 2 Cu 2 Se 2 , comprising alternating [Sr 2 NiO 2 ] 2+ and [Cu 2 Se 2 ] 2− layers, is reported. Powder neutron diffraction shows that the Ni 2+ ions, which are in a highly elongated NiO 4 Se 2 environment with D 4h symmetry, adopt a high-spin configuration and carry localized magnetic moments which order antiferromagnetically below ∼160 K in a √2a × √2a × 2c expansion of the nuclear cell with an ordered moment of 1.31(2) μ B per Ni 2+ ion. The adoption of the high-spin configuration for this d 8 cation… Show more
“…Dinuclear copper( i ) chalcogenide, [CuE] 2 , is a common building unit in many copper( i )–chalcogenide high-temperature superconducting materials. 1–5 The expansion of the lattice in copper( i )–chalcogenides is driven by the changes in the chalcogenide layer. 6 By substituting Se with S, the Cu–E bond length in the copper( i )–chalcogenide lattice is expected to increase.…”
The Cu···Cu interactions, known as cuprophilicity, depict a significant role in copper-chalcogenide functional materials. Three dinuclear copper chalcogenone complexes [(L1CuI)2] (1), [(L2CuI)2] (2) and [Cu2(L3)4]PF6 (3) have been isolated and...
“…Dinuclear copper( i ) chalcogenide, [CuE] 2 , is a common building unit in many copper( i )–chalcogenide high-temperature superconducting materials. 1–5 The expansion of the lattice in copper( i )–chalcogenides is driven by the changes in the chalcogenide layer. 6 By substituting Se with S, the Cu–E bond length in the copper( i )–chalcogenide lattice is expected to increase.…”
The Cu···Cu interactions, known as cuprophilicity, depict a significant role in copper-chalcogenide functional materials. Three dinuclear copper chalcogenone complexes [(L1CuI)2] (1), [(L2CuI)2] (2) and [Cu2(L3)4]PF6 (3) have been isolated and...
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