Journal ArticleDOI
Designer magnets containing cyanides and nitriles.
Joel S. Miller,Jamie L. Manson +1 more
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Three-dimensional network solids exhibiting magnetic ordering have been made from several first-row metal ions and bridging unsaturated cyanide, tricyanomethanide, and/or dicyanamide ligands, which possess several different structural motifs, and the shorter the bridge, the stronger the interaction.Abstract:
Magnets synthesized from molecules have contributed to the renaissance in the study of magnetic materials. Three-dimensional network solids exhibiting magnetic ordering have been made from several first-row metal ions and bridging unsaturated cyanide, tricyanomethanide, and/or dicyanamide ligands. These materials possess several different structural motifs, and the shorter the bridge, the stronger the interaction (i.e., C⋮N > N⋮CN ≫ N⋮CNC⋮N = N⋮CCC⋮N). Cyanide additionally has the ability to discriminate between C- and N-bonding to form ordered heterobimetallic magnets, and the strong coupling can lead to ferro- or ferrimagnetic ordering substantially above room temperature. Tricoordination of tricyanomethanide results in spin-frustrated systems, which possess interpenetrating rutile-like networks. In contrast, single rutile-like frameworks are formed by μ3-bonded dicyanamide, which leads to ferromagnetics and weak ferromagnetics.read more
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An efficient transformation of primary halides into nitriles through palladium-catalyzed hydrogen transfer reaction
TL;DR: Two-step one-pot transformation of primary halides into corresponding nitriles is successfully achieved and palladium-catalyzed hydrogen transfer proceeds smoothly in the presence of sterically bulky ligand dicyclohexyl(2',4',6'-triisopropylbiphenyl-2-yl)phosphine in acetone to produce nitRiles in satisfactory to good yields.
Journal ArticleDOI
Direct synthesis of nitriles by Cu/DMEDA/TEMPO-catalyzed aerobic oxidation of primary amines with air
Xiantao Ma,Xiantao Ma,Hao Xu,Ying-Lin Xiao,Chenliang Su,Chenliang Su,Jian-Ping Liu,Xu Qing,Xu Qing +8 more
TL;DR: By screening the copper catalysts, ligands, and reaction conditions, a simple CuCl/DMEDA/TEMPO catalyst system was developed for direct and selective synthesis of the useful nitriles by an aerobic oxidation reaction of primary amines using air as an advantageous oxidant under mild conditions as mentioned in this paper.
Journal ArticleDOI
One-step synthesis of nitriles by the dehydrogenation–amination of fatty primary alcohols over Cu/m-ZrO2
TL;DR: In this article, an effective method for one-step synthesis of nitriles employing C2-C8 fatty primary alcohols and ammonia over 5%Cu/m-ZrO2 has been found.
Journal ArticleDOI
New 3D dicyanamide bridged coordination polymer of Ni(II): Synthesis, crystal structure, magnetic properties and antibacterial assay
Leila Tabrizi,Hossein Chiniforoshan,João P. Araújo,Armandina M. L. Lopes,Armandina M. L. Lopes,Helmar Görls,Winfried Plass,Gholamhossein Mohammadnezhad +7 more
TL;DR: One new coordination polymer of Ni(II), {[Ni(μ1,5-dca)2(μ-hmt)]H2O}n, (1), using hmt (hmt =hexamethylenetetramine), and dca (dca = dicyanamide) as bridged ligands has been synthesized and characterized by X-ray single crystal analysis as discussed by the authors.
Journal ArticleDOI
Crystal structure and magnetic properties of [{Cu(cyclam)}3{Fe(CN)6}2] · 6H2O, a cyano-bridged assembly with a rope-ladder chain structure
TL;DR: In this paper, the synthesis, crystal structure and magnetic properties of the cyano-bridged complex [{Cu(cyclam)} 3 {Fe(CN) 6 } 2 ]· 6H 2 O are reported.
References
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Journal ArticleDOI
Selective binding and removal of guests in a microporous metal–organic framework
TL;DR: In this paper, a metal-organic framework was designed to bind aromatic guest molecules selectively, and the inclusions can be selectively readsorbed, even after the removal of included guest molecules, and they showed that the crystal lattice was thermally stable up to 350 °C.
Journal ArticleDOI
Design and construction of a new class of scaffolding-like materials comprising infinite polymeric frameworks of 3D-linked molecular rods. A reappraisal of the zinc cyanide and cadmium cyanide structures and the synthesis and structure of the diamond-related frameworks [N(CH3)4][CuIZnII(CN)4] and CuI[4,4',4'',4'''-tetracyanotetraphenylmethane]BF4.xC6H5NO2
B. F. Hoskins,Richard Robson +1 more
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A room-temperature organometallic magnet based on Prussian blue
TL;DR: In this paper, a room-temperature organometallic magnet was synthesized by combining a hexa-cyanometalate [M(CN)6]q− with a Lewis acid Lp+.
Journal ArticleDOI
Strongly Geometrically Frustrated Magnets
TL;DR: The study of cooperative phenomena in magnetism has provided fertile ground for testing theories of interacting systems that possess different spatial dimensions, ranges, and sign of interactions, and that exhibit local anisotropy of the basic interacting unit, the magnetic spin this paper.
Journal ArticleDOI
Sol−Gel Synthesis of KVII[CrIII(CN)6]·2H2O: A Crystalline Molecule-Based Magnet with a Magnetic Ordering Temperature above 100 °C
TL;DR: In this paper, the use of sol-gel methods was described to synthesize several crystalline molecule-based magnets with the Prussian blue structure, including KV II[CrIII (CN)6]‚2H2O, with an ordering temperature of 376 K (103°C).