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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Visible-Light-Driven Aerobic Oxidation of Amines to Nitriles over Hydrous Ruthenium Oxide Supported on TiO2
Daniil S. Ovoshchnikov,Baira G. Donoeva,Baira G. Donoeva,Vladimir B. Golovko,Vladimir B. Golovko +4 more
TL;DR: Aerobic oxidation of amines to nitriles under visible light irradiation was catalyzed by supported hydrous ruthenium oxide catalyst in this paper, where water can be used as a solvent instead of toluene without the loss of activity and selectivity.
Journal ArticleDOI
Single-ion magnet behaviour in mononuclear and two-dimensional dicyanamide-containing cobalt(II) complexes
Anna Świtlicka-Olszewska,Joanna Palion-Gazda,Tomasz Klemens,Barbara Machura,Julia Vallejo,Joan Cano,Francesc Lloret,Miguel Julve +7 more
TL;DR: Three cobalt(II) complexes of formulae were prepared and structurally analyzed by single-crystal X-ray crystallography as mentioned in this paper, where the cobalt-cobalt ion is six-coordinate with four bim molecules in the equatorial positions.
Journal ArticleDOI
Ligand effects on the structures of extended networks of dicyanamide-containing transition-metal ions.
TL;DR: The structural characterization of a series of complexes of formula [M(dca)2L]n, where dca = dicyanamide, L = 1,10-phenanthroline (phen) and 2,9-dimethylphenan Throline (2,9,dmphen) [9-12], has revealed the effect of the presence of the methyl substituents of L on the resulting network.
Journal ArticleDOI
Structural analysis and magnetic properties of the copper(II) dicyanamide complexes [Cu2(dmphen)2(dca)4], [Cu(dmphen)(dca)(NO3)]n and [Cu(4,4′-dmbpy)(H2O)(dca)2] (dca=dicyanamide; dmphen=2,9-dimethyl-1,10-phenanthroline; 4,4′-dmbpy=4,4′-dimethyl-2,2′-bipyridine)
TL;DR: In this paper, the preparation, crystal structures and magnetic properties of three copper(II) compounds of formulae [Cu2(dmphen)2 (dca)4] (1), [Cu(dMPhen)(dca)(NO3)]n (2) and [cu(4,4′-dmbpy)(H2O)(dCA)2] (3) are reported.
Journal ArticleDOI
Sandmeyer cyanation of arenediazonium tetrafluoroborate using acetonitrile as a cyanide source
Wen‐Bin Xu,Qinghui Xu,Jizhen Li +2 more
TL;DR: Palladium-catalyzed cyanation of aryldiazonium tetrafluoroborate using acetonitrile as a non-metallic cyanide source was achieved in the presence of Ag2O under ambient air, eliminating the involvement of highly toxic CuCN used in the traditional Sandmeyer reaction as discussed by the authors.
References
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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+.
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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).