Articles from Wiley
The first structure–property relationship study of a key class of organic semiconductors, the four spirobifluorene positional isomers, is reported. The impact of the ring bridging on the photophysical properties is stressed and the first member of a new family of spirobifluorenes substituted in position 1 is described, presenting better performance in blue phosphorescent OLEDs than those of its regioisomers.
Lambert Sicard, Cassandre Quinton, Jean-David Peltier, Denis Tondelier, Bernard Geffroy, Urelle Biapo, Rémi Métivier, Olivier Jeannin, Joëlle Rault-Berthelot, Cyril Poriel
Chem. Eur. J., April 06, 2017, https://doi.org/10.1002/chem.201700570 Read article
Paragenesis of Palladium–Cobalt Nanoparticle in Nitrogen-Rich Carbon Nanotubes as a Bifunctional Electrocatalyst for Hydrogen-Evolution Reaction and Oxygen-Reduction Reaction
Fuel cell electrocatalyst: Carbon nanotubes containing cobalt nanoparticles (CoCNTs) have been decorated with palladium nanoparticles (PdNPs; see figure). The resulting Pd-CoCNTs have been demonstrated to show outstanding performances as an electrocatalyst for both the hydrogen evolution reaction (HER) and the oxygen reduction reaction (ORR).
Binbin Huang, Liyu Chen, Yan Wang, Liuzhang Ouyang, Jianshan Ye
Chem. Eur. J., April 06, 2017, https://doi.org/10.1002/chem.201700544 Read article
Redox activity of uranium imido complexes: Tailored, redox-active multiply bonded ligands that bear naphthalene moieties are developed in the coordination chemistry of uranium.
Kimberly C. Mullane, Patrick J. Carroll, Eric J. Schelter
Chem. Eur. J., April 06, 2017, https://doi.org/10.1002/chem.201605758 Read article
Direct or Indirect? The mechanism of CO hydrogenation to methanol catalyzed by the Ni/alkali alkoxide system is studied by DFT. Direct hydrogenation of CO by nickel formyl species and indirect hydrogenation via methyl formate formation, have been examined. The theoretical results are discussed in the context of existing experimental observations, and a good agreement with past studies was obtained.
David S. McGuinness, Jim Patel, Mohamad Hassan Amin, Suresh K. Bhargava
ChemCatChem, April 06, 2017, https://doi.org/10.1002/cctc.201700213 Read article
Catalyst or support: Graphene hybrids have been considered as very promising electrocatalysts for water electrolysis. This Minireview summarizes the recent advances of graphene hybrid electrocatalysts for overall water-splitting, especially highlighting the detailed roles of graphene as catalysts and/or supports in electrochemical water-splitting.
Jiayuan Li, Zeqiong Zhao, Yuanyuan Ma, Yongquan Qu
ChemCatChem, April 06, 2017, https://doi.org/10.1002/cctc.201700175 Read article
Bifunctional Catalysts Based on Tungsten Hydrides Supported on Silicated Alumina for the Direct Production of 2,3-Dimethylbutenes and Neohexene from Isobutene
Cat got your tungsten? We study the influence of the acidic properties of silicated alumina on the catalytic performances of supported tungsten hydride catalysts for isobutene conversion. The positive effect of moderate doping on the catalytic productivity is evidenced. Indeed, the sample with 5 wt % of SiO2 allows us to obtain high selectivities to 2,3-dimethylbutenes and neohexene.
Cherif Larabi, Anthony Garron, Pascal Rouge, Kai C. Szeto, Sébastien Norsic, Aimery De Mallmann, Nicolas Merle, Mostafa Taoufik
ChemCatChem, April 06, 2017, https://doi.org/10.1002/cctc.201700106 Read article
Lithium-Catalyzed anti-Markovnikov Intermolecular Hydroamination Reactions of Vinylarenes and Simple Secondary Amines
Amines to an end: Various β-arylethylamine derivatives are straightforwardly obtained by the lithium-catalyzed anti-Markovnikov selective intermolecular hydroamination reaction of vinylarenes with secondary aliphatic amines. The use of as little as 1.5 mol % LiCH2TMS as a solid base in THF proves to be efficient to deliver the target products at room temperature with full conversions and stoichiometric amounts of the partners.
Stéphane Germain, Meije Lecoq, Emmanuelle Schulz, Jérôme Hannedouche
ChemCatChem, April 06, 2017, https://doi.org/10.1002/cctc.201700043 Read article
Olefin generation without a metal: Edge-hydroxylated boron nitride shows superior selectivity for the oxidative dehydrogenation of propane to propylene with only negligible CO2 formation. The dynamically generated active BNO. site triggers propane dehydrogenation by selectively breaking the C−H bond by concomitantly avoiding propylene oxidation to CO2.
Lei Shi, Dongqi Wang, Wei Song, Dan Shao, Wei-Ping Zhang, An-Hui Lu
ChemCatChem, April 06, 2017, https://doi.org/10.1002/cctc.201700004 Read article
Bi<sub>2</sub>WO<sub>6</sub> Nanosheets Decorated with Au Nanorods for Enhanced Near-Infrared Photocatalytic Properties Based on Surface Plasmon Resonance Effects and Wide-Range Near-Infrared Light Harvesting
Rods of gold: Au nanorods are used to enhance the NIR-light absorption of Bi2WO6, a typical visible-light and novel NIR-light photocatalyst. The enhancement of the composite's NIR-light photocatalytic and photoelectrochemical properties can be attributed to the surface plasmon resonance (SPR) effects and wide-range NIR light harvesting of the Au nanorods.
Xiaolin Hu, Jian Tian, Yanjun Xue, Yujie Li, Hongzhi Cui
ChemCatChem, April 06, 2017, https://doi.org/10.1002/cctc.201601719 Read article
Supercritical anti-solvent (SAS) precipitation and co-precipitation methods were used to make catalysts for methanol synthesis from CO2 and H2, utilising Cu supported on Zn, Mg, Mn, and Ce oxides. The SAS method produces initially active materials with high Cu specific surface area, but they are unstable. Co-precipitation led to much greater stability materials. There was a near-linear dependence of activity upon Cu specific area (see picture), but the initial performance was different from that post-reaction, after loss of surface area.
James S. Hayward, Paul J. Smith, Simon A. Kondrat, Michael Bowker, Graham J. Hutchings
ChemCatChem, April 06, 2017, https://doi.org/10.1002/cctc.201601692 Read article
Mechanisms for the Grubbs catalyst: The third-generation Grubbs catalyst most likely transforms to ruthenium η3-vinylcarbene complex in the presence of phenylacetylene. Further reactions can lead to stilbene and ruthenium vinylidene species. The formation of spectator ruthenium tris(3-bromopyridine) complex is also predicted.
Maciej Gierada, Izabela Czeluśniak, Jarosław Handzlik
ChemCatChem, April 06, 2017, https://doi.org/10.1002/cctc.201601647 Read article
Asymmetric Reduction of Substituted 2-Tetralones by <i>Thermoanaerobacter pseudoethanolicus</i> Secondary Alcohol Dehydrogenase
Perfect fit: Substituted 2-tetralones are reduced to optically enriched 2-tetralols by using mutants of Thermoanaerobacter pseudoethanolicus secondary alcohol dehydrogenase. Docking studies explain how the substituent's position on the 2-tetralone influences the binding orientation of the substrates and their reaction stereoselectivity.
Odey Bsharat, Musa M. Musa, Claire Vieille, Sulayman A. Oladepo, Masateru Takahashi, Samir M. Hamdan
ChemCatChem, April 06, 2017, https://doi.org/10.1002/cctc.201601618 Read article
Intermetallic Compounds as Potential Alternatives to Noble Metals in Heterogeneous Catalysis: The Partial Hydrogenation of Butadiene on γ-Al<sub>4</sub>Cu<sub>9</sub>(1 1 0)
Interesting intermetallics: Intermetallic compounds are potential catalyst alternatives to noble metals. Using surface-science methods, the catalytic properties of the γ-Al4Cu9 phase have been investigated for the first time. This material is highly selective for the partial hydrogenation of butadiene to butenes, that is, no butane is produced. Although the active sites are likely composed of Cu atoms (blue), neighboring Al atoms (grey) may strengthen the hydrocarbon–surface bond.
Laurent Piccolo, Lidiya Kibis, Marie-Cécile De Weerd, Emilie Gaudry, Julian Ledieu, Vincent Fournée
ChemCatChem, April 06, 2017, https://doi.org/10.1002/cctc.201601587 Read article
Going retro: We apply the principles of “biocatalytic retrosynthesis” to the synthesis of the medium-chain α,ω-dicarboxylic acid sebacic acid using a de novo designed and engineered retro-aldolase for a key biocatalytic step.
Konrad B. Otte, Elena Maurer, Marko Kirtz, Daniela Grabs, Eric Althoff, Sebastian Bartsch, Andreas Vogel, Bettina M. Nestl, Bernhard Hauer
ChemCatChem, April 06, 2017, https://doi.org/10.1002/cctc.201601551 Read article
Copper-Catalyzed Carbonylative Cross-Coupling of Arylboronic Acids with <i>N</i>-Chloroamines for the Synthesis of Aryl Amides
Zhiping Yin, Zechao Wang, Wanfang Li, Xiao-Feng Wu
Eur. J. Org. Chem., April 05, 2017, https://doi.org/10.1002/ejoc.201700352 Read article
Synthesis of Biisoxazoletetrakis(methyl nitrate): A Potential Nitrate Plasticizer and Highly Explosive Material
The synthesis of biisoxazoletetrakis(methyl nitrate) is described. It features a metal- and halogen-free cycloaddition of an electron-rich alkyne and a nitrile oxide to yield a doubly trisubstituted biisoxazole. This energetic material has potential use as an energetic propellant, a plasticizer/wetting agent, a melt-castable eutectic explosive, and an ingredient in percussion primer compositions.
Leah A. Wingard, Eric C. Johnson, Pablo E. Guzmán, Jesse J. Sabatini, Gregory W. Drake, Edward F. C. Byrd, Rosario C. Sausa
Eur. J. Org. Chem., April 05, 2017, https://doi.org/10.1002/ejoc.201700280 Read article
Planar-Chiral [2.2]Paracyclophane-Based Amides as Proligands for Titanium- and Zirconium-Catalyzed Hydroamination
A synthetic route to racemic and enantiopure planar chiral [2.2]paracyclophanes with amide groups was developed for use as N,O-chelating ligands in hydroamination reactions. When coordinated to titanium or zirconium, hydroamination reactivity studies showed that the planar chirality of the ligand was translated into central chirality in the product.
Carolin Braun, Stefan Bräse, Laurel L. Schafer
Eur. J. Org. Chem., April 05, 2017, https://doi.org/10.1002/ejoc.201700101 Read article
Dichlorosilylene Transfer to a <i>P</i>-Fluorophosphaalkene: The Route to a <i>C</i>-Dichlorofluorosilyl-Functionalized Dialkyldiphosphene
Cristina Mitrofan, Thorsten Gust, Andreas Zanin, Roxana M. Bîrzoi, Peter G. Jones, Wolf-W. du Mont, Satoko Hayashi, Waro Nakanishi, Heinrich C. Marsmann
Eur. J. Inorg. Chem., April 05, 2017, https://doi.org/10.1002/ejic.201700335 Read article
The high-yielding synthesis of the first luminescent polynuclear CuI cluster stabilized by monothiocarbonate ligands is illustrated. Tuning of the photoluminescence properties with various N-donor ligands is demonstrated.
Arvind K. Gupta, Pilli V. V. N. Kishore, Jian-Hong Liao, Yuan-Jang Chen, C. W. Liu
Eur. J. Inorg. Chem., April 05, 2017, https://doi.org/10.1002/ejic.201700070 Read article
Comparison of Intramolecular and Intermolecular Ammonium and Phosphonium Borohydrides in Hydrogen-, Proton-, and Hydride-Transfer Reactions
The thermodynamics of H2, H+, and H– transfer from 13 ammonium borohydride and six phosphonium borohydride intramolecular and intermolecular frustrated Lewis pairs (FLPs) were probed to determine whether intramolecular or intermolecular amine- or phosphine-containing FLPs are preferred in FLP-catalyzed hydrogenation reactions.
A. Paige Lathem, Benjamin L. Rinne, Marc A. Maldonado, Zachariah M. Heiden
Eur. J. Inorg. Chem., April 05, 2017, https://doi.org/10.1002/ejic.201700016 Read article