slideshow 16 slideshow 1 slideshow 2 slideshow 3 slideshow 4 slideshow 5 slideshow 6 slideshow 7 slideshow 8 slideshow 0 slideshow 9 slideshow 10 slideshow 11 slideshow 12 slideshow 13 slideshow 14 slideshow 15

Articles from Wiley

Condividi contenuti
The latest chemistry from ChemPubSoc Europe and Wiley-VCH
Aggiornato: 2 settimane 3 giorni fa

Spirobifluorene Regioisomerism: A Structure–Property Relationship Study

6 aprile, 2017 - 00:00

 A Structure–Property Relationship Study

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.

[Full Paper]
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

6 aprile, 2017 - 00:00

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).

[Full Paper]
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

Synthesis and Reduction of Uranium(V) Imido Complexes with Redox-Active Substituents

6 aprile, 2017 - 00:00

Synthesis and Reduction of Uranium(V) Imido Complexes with Redox‐Active Substituents

Redox activity of uranium imido complexes: Tailored, redox-active multiply bonded ligands that bear naphthalene moieties are developed in the coordination chemistry of uranium.

[Full Paper]
Kimberly C. Mullane, Patrick J. Carroll, Eric J. Schelter
Chem. Eur. J., April 06, 2017, https://doi.org/10.1002/chem.201605758 Read article

DFT Study of Nickel-Catalyzed Low-Temperature Methanol Synthesis

6 aprile, 2017 - 00:00

DFT Study of Nickel‐Catalyzed Low‐Temperature Methanol Synthesis

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.

[Full Paper]
David S. McGuinness, Jim Patel, Mohamad Hassan Amin, Suresh K. Bhargava
ChemCatChem, April 06, 2017, https://doi.org/10.1002/cctc.201700213 Read article

Graphene and Their Hybrid Electrocatalysts for Water Splitting

6 aprile, 2017 - 00:00

Graphene and Their Hybrid Electrocatalysts for Water Splitting

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.

[Minireview]
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

6 aprile, 2017 - 00:00

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.

[Full Paper]
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

6 aprile, 2017 - 00:00

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.

[Communication]
Stéphane Germain, Meije Lecoq, Emmanuelle Schulz, Jérôme Hannedouche
ChemCatChem, April 06, 2017, https://doi.org/10.1002/cctc.201700043 Read article

Edge-hydroxylated Boron Nitride for Oxidative Dehydrogenation of Propane to Propylene

6 aprile, 2017 - 00:00

Edge‐hydroxylated Boron Nitride for Oxidative Dehydrogenation of Propane to Propylene

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.

[Full Paper]
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

6 aprile, 2017 - 00:00

Bi2WO6 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.

[Full Paper]
Xiaolin Hu, Jian Tian, Yanjun Xue, Yujie Li, Hongzhi Cui
ChemCatChem, April 06, 2017, https://doi.org/10.1002/cctc.201601719 Read article

The Effects of Secondary Oxides on Copper-Based Catalysts for Green Methanol Synthesis

6 aprile, 2017 - 00:00

The Effects of Secondary Oxides on Copper‐Based Catalysts for Green Methanol Synthesis

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.

[Full Paper]
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

Terminal-Alkyne-Induced Decomposition of a Phosphine-Free Ruthenium Alkylidene Catalyst

6 aprile, 2017 - 00:00

Terminal‐Alkyne‐Induced Decomposition of a Phosphine‐Free Ruthenium Alkylidene Catalyst

Mechanisms for the Grubbs catalyst: The third-generation Grubbs catalyst most likely transforms to ruthenium &#x3B7;3-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.

[Full Paper]
Maciej Gierada, Izabela Czelu&#x15B;niak, Jaros&#x142;aw 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

6 aprile, 2017 - 00:00

Asymmetric Reduction of Substituted 2‐Tetralones by Thermoanaerobacter pseudoethanolicus 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.

[Full Paper]
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)

6 aprile, 2017 - 00:00

 The Partial Hydrogenation of Butadiene on &#x3B3;‐Al4Cu9(1 1 0)

Interesting intermetallics: Intermetallic compounds are potential catalyst alternatives to noble metals. Using surface-science methods, the catalytic properties of the &#x3B3;-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.

[Full Paper]
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

Synthesis of Sebacic Acid Using a De Novo Designed Retro-Aldolase as a Key Catalyst

6 aprile, 2017 - 00:00

Synthesis of Sebacic Acid Using a De Novo Designed Retro‐Aldolase as a Key Catalyst

Going retro: We apply the principles of “biocatalytic retrosynthesis” to the synthesis of the medium-chain &#x3B1;,&#x3C9;-dicarboxylic acid sebacic acid using a de novo designed and engineered retro-aldolase for a key biocatalytic step.

[Communication]
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

5 aprile, 2017 - 00:00

Copper‐Catalyzed Carbonylative Cross‐Coupling of Arylboronic Acids with N‐Chloroamines for the Synthesis of Aryl Amides

[Communication]
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

5 aprile, 2017 - 00:00

 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.

[Communication]
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

5 aprile, 2017 - 00:00

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.

[Full Paper]
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

5 aprile, 2017 - 00:00

[Correction]
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

Hexadecanuclear Copper Monothiocarbonates: An Emissive Cluster Building Block

5 aprile, 2017 - 00:00

 An Emissive Cluster Building Block

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.

[Communication]
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

5 aprile, 2017 - 00:00

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.

[Full Paper]
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

Copyright © 2012 Società Chimica Italiana. All Rights Reserved.