- Versatile Method for the Simultaneous Synthesis of Two Ionic Liquids, Otherwise Difficult to Obtain, with High Atom Economy
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A new synthetic approach and full spectral (NMR, IR, MS) and ion chromatographic characterization (IC) of nitrogen-based ionic liquids bearing allyl- or ethyl- substituent and triflate, tosylate, methyl sulfate or methanesulfonate anion has been presented. On a sample of 16 new ionic liquids, the versatility of the anion exchange method has been proven. In the metathesis reactions that have been carried out, the halide anion was exchanged in ionic liquid with an alkyl sulfonate based anion using alkylating agents. The results obtained using ion chromatographic analysis on the newly synthesized compounds have been discussed. Also, the utilization of a gaseous methyl halide by-product, obtained in the metathesis reaction and otherwise difficult to synthesize, has been presented. This approach ensured high atom economy of the overall process, which makes the proposed methodology sustainable and eco-friendly.
- Szpecht, Andrea,Zajac, Adrian,Zielinski, Dawid,Maciejewski, Hieronim,Smiglak, Marcin
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p. 972 - 983
(2019/08/06)
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- Quaternary ammonium salt ion liquid and its preparation method and application
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The invention relates to a quaternary ammonium salt ionic liquid. The chemical structural formula of the ionic liquid is shown as the specification, wherein R is alkyl of C1-C4; Y is CF3SO3 or CF3CO2. The quaternary ammonium salt ionic liquid is completely formed by ions at room temperature or under a situation close to the room temperature, has the advantages of high electrical conductivity, low melting point, wide electrochemical window, no volatilization or inflammability, good thermal stability and no halogen impurities or toxicity, and can be applied to the field of preparation of supercapacitors or lithium ionic batteries with high specific capacity. Furthermore, the invention also relates to a preparation method and application of the quaternary ammonium salt ionic liquid.
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Paragraph 0081; 0082; 0083; 0084
(2016/11/02)
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- A family of Tri- and dimetallic pyridine dicarboxamide cryptates: Unusual O, N, O -coordination and facile access to secondary coordination sphere hydrogen bonding interactions
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A series of tri- and dimetallic metal complexes of pyridine dicarboxamide cryptates are reported in which changes to the base and metal source result in diverse structure types. Addition of strong bases, such as KH or KN(SiMe3)2, followed by divalent metal halides allows direct access to trinuclear complexes in which each metal center is coordinated by a dianionic N,N,N-chelate of each arm. These complexes bind a guest K+ cation within the central cavity in a trigonal planar coordination environment. Minor changes to the solvent and equivalents of base used in the syntheses of the triiron(II) and tricobalt(II) complexes affords two trinuclear clusters with atypical O,N,O-coordination by each pyridine dicarboxamide arm; the amide carbonyl O atoms are oriented toward the interior of the cavity to coordinate to each metal center. Finally, varying the base enables the selective synthesis of dinuclear nickel(II) and copper(II) complexes in which one pyridine dicarboxamide arm remains protonated. These amide protons are at one end of a hydrogen bonding network that extends throughout the internal cavity and terminates at a metal bound hydroxide, carbonate, or bicarbonate donor. In the dinickel complex, the bicarbonate cannot be liberated as CO2 either thermally or upon sparging with N2, which differs from previously reported monometallic complexes. The carbonate or bicarbonate ligands likely arise from sequestration of atmospheric CO2 based on the observed reaction of the di(hydroxonickel) analog.
- Guillet, Gary L.,Gordon, Jesse B.,Di Francesco, Gianna N.,Calkins, Matthew W.,?i?már, Erik,Abboud, Khalil A.,Meisel, Mark W.,García-Serres, Ricardo,Murray, Leslie J.
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p. 2691 - 2704
(2015/03/30)
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- Switching the activity of a photoredox catalyst through reversible encapsulation and release
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Reversible encapsulation of [Ru(bpy)3]2+ within a self-assembled hexameric resorcin[4]arene capsule turns off the photocatalytic aerobic oxidation of an aliphatic sulfide. Upon addition of a competitive cationic guest, the Ru(ii) catalyst is released into solution where its catalytic activity is restored.
- Bianchini, Giulio,Scarso, Alessandro,Sorella, Giorgio La,Strukul, Giorgio
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supporting information
p. 12082 - 12084
(2013/01/16)
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- Antistatic composition
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An antistatic composition comprises (a) at least one ionic salt consisting of a nonpolymeric nitrogen onium cation and a weakly coordinating fluoroorganic anion, the conjugate acid of the anion being a superacid; and (b) at least one thermoplastic polymer. The composition exhibits good antistatic performance over a wide range of humidity levels.
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- Ruthenium(II) solvento complexes containing the tripod-like ligands MeC(CH2EPh2)3 (E = P or As) and their reactions with carbon monoxide. Crystal and molecular structure of [Ru2(μ-Cl)3(MeC(CH2PPh2) 3)2][BPh4]
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Treatment of [RuCl2(DMSO)4] with tripod [tripod = MeC(CH2EPh2)3, E = P (triphos) or As (triars)] yields [Ru2(μ-Cl)3-(tripod)2]Cl. In the case of triars the mononuclear intermediate [RuCl2(DMSO)(triars)] can be isolated. This condenses to the corresponding trichloro-bridged complex in MeOH. The chloride ligands of [Ru2(μ-Cl)3(tripod)2]Cl can be abstracted by AgCF3SO3 in MeCN to yield [Ru(MeCN)3(tripod)](CF3SO3)2. When the chloride abstraction is carried out in DMSO and above 100 °C, the products are [Ru(DMSO)3(tripod)](CF3SO3)2, whereas if the reaction is carried out below 100 °C, the mixed-solvent complexes [Ru(H2O)(DMSO)2(tripod)](CF3SO 3)2 are obtained. Reaction of the DMSO complexes with carbon monoxide gives the dicarbonyl triflate complexes [Ru(CF3SO3)(CO)2(tripod)](CF3SO 3). The X-ray diffraction study of a crystal of [Ru2(μ-Cl)3(tripod)2][BPh4] (orthorhombic, of space group Pccn and with a = 19.991 (8) A?, b = 18.388 (7) A?, c = 25.510 (10) A?, and Z = 4) is reported.
- Rhodes, Larry F.,Sorato, Carla,Venanzi, Luigi M.,Bachechi, Fiorella
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p. 604 - 610
(2008/10/08)
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