ChemCatChem

Cover image for Vol. 9 Issue 13

Early View (Online Version of Record published before inclusion in an issue)

Editor: Michael Rowan; Editorial Board Chairs: Uwe Bornscheuer, Hermenegildo García, A. Stephen K. Hashmi

Impact Factor: 4.803

ISI Journal Citation Reports © Ranking: 2016: 29/145 (Chemistry Physical)

Online ISSN: 1867-3899

Associated Title(s): Advanced Synthesis & Catalysis, Angewandte Chemie International Edition, Chemistry - A European Journal, ChemBioChem, ChemElectroChem, ChemPhotoChem, ChemPhysChem, ChemSusChem

  1. Full Papers

    1. Palladium on Polydopamine: Its True Potential in Catalytic Transfer Hydrogenations and Heck Coupling Reactions

      Attila Kunfi, Vivien Szabó, Dr. Ágnes Mastalir, Dr. Imre Bucsi, Dr. Miklós Mohai, Dr. Péter Németh, Dr. Imre Bertóti and Dr. Gábor London

      Version of Record online: 21 JUL 2017 | DOI: 10.1002/cctc.201700609

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      Pd on polydopamine: The application of Pd–polydopamine and magnetic Fe3O4@Pd–polydopamine catalysts in catalytic transfer hydrogenation reactions and the Heck arylation is reported. The reduction of a wide range of aromatic nitro-compounds bearing both electron-donating and -withdrawing substituents to the corresponding anilines could be efficiently performed, although the reduction of carbonyl compounds was found to be less general.

    2. Post-Synthetic Immobilization of Ni Ions in Porous-Organic Polymer-Graphene Composite for the Non-Noble Metal Electrocatalytic Water Oxidation

      Ahmed B. Soliman, Mohamed H. Hassan, Arwa A. Abugable, Dr. Stavros G. Karakalos and Prof. Mohamed H. Alkordi

      Version of Record online: 21 JUL 2017 | DOI: 10.1002/cctc.201700601

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      POP-Metal rocks: A durable composite of porous-organic polymer and graphene, metallated with Ni ions, demonstrated significant catalytic performance for water oxidation.

    3. Effects of the Linking of Cyclopentadienyl and Ketimide Ligands in Titanium Half-Sandwich Olefin Polymerization Catalysts

      Vojtech Varga, Miloš Večeřa, Dr. Róbert Gyepes, Dr. Jiří Pinkas, Dr. Michal Horáček, Dr. Jan Merna and Dr. Martin Lamač

      Version of Record online: 21 JUL 2017 | DOI: 10.1002/cctc.201700498

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      Unleashed activity: Effects of ketimide ligand distortion that result from its intramolecular tethering in Ti half-sandwich complexes are investigated with respect to the olefin polymerization activity. The role of the cocatalyst on the catalytic performance is decisive. Huge differences between the studied complexes are found if Al-based cocatalysts are used, whereas the activating system in which hydrosilane and B(C6F5)3 are used performs well for both types.

  2. Communications

    1. Gold(I)-Complex–Titania Hybrid Photocatalyst for Hydrogen Production

      Elisabet Aguiló, Dr. Lluís Soler, Dr. Albert Casanovas, Dr. Artur J. Moro, Prof. João Carlos Lima, Prof. Laura Rodríguez and Prof. Jordi Llorca

      Version of Record online: 21 JUL 2017 | DOI: 10.1002/cctc.201700518

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      Coming together: The integration of TiO2 with a AuI complex containing a thiocoumarin moiety results in a catalyst that is intrinsically active for the photogeneration of H2. This is the first example of a AuI-complex–semiconductor hybrid photocatalyst. The rate of H2 generation under dynamic conditions from water/ethanol is approximately one order of magnitude superior on a metal basis to that obtained over conventional TiO2 decorated with Au metal nanoparticles.

  3. Full Papers

    1. Unconventional Pd@Sulfonated Silica Monoliths Catalysts for Selective Partial Hydrogenation Reactions under Continuous Flow

      Dr. Francesca Liguori, Dr. Pierluigi Barbaro, Dr. Bilel Said, Dr. Anne Galarneau, Dr. Vladimiro Dal Santo, Dr. Elisa Passaglia and Dr. Alessandro Feis

      Version of Record online: 20 JUL 2017 | DOI: 10.1002/cctc.201700381

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      Unconventionality as a principle: Doubly functionalized, hierarchical-porosity silica monoliths, synthesized by postgrafting of sulfonic groups and in situ growth of Pd nanoparticles, show remarkable versatility and efficiency as catalysts under very mild conditions in the continuous-flow, partial hydrogenation reaction of various substrates.

  4. Communications

    1. Ruthenium-Catalyzed C−H Bond Alkylation of Arylphosphine Oxides with Alkenes: A Straightforward Access to Bifunctional Phosphorous Ligands with a Pendent Carboxylate

      Chang-Sheng Wang, Prof. Pierre H. Dixneuf and Dr. Jean-François Soulé

      Version of Record online: 13 JUL 2017 | DOI: 10.1002/cctc.201700557

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      Ruthenium(II)-catalyzed C−H bond alkylation of arylphosphine oxide with functional alkenes has been developed. The use of acetic acid was found to be critical to favor the formation of the alkylation products whereas the use of NaHCO3 affords alkenylation products. This method allows the desymmetrization of diarylphosphine oxides. After reduction of the phosphine oxide, novel phosphines bearing a flexible pendent carboxylate were synthesized.

    2. In Vivo Synthesis of Polyhydroxylated Compounds from a “Hidden Reservoir” of Toxic Aldehyde Species

      Thomas Bayer, Sofia Milker, Thomas Wiesinger, Dr. Margit Winkler, Prof. Marko D. Mihovilovic and Dr. Florian Rudroff

      Version of Record online: 13 JUL 2017 | DOI: 10.1002/cctc.201700469

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      A biocatalytic funnel: The presented concept is a rational approach to tune the concentration of toxic aldehyde intermediates in living cells. We adjust the redox equilibrium between alcohol, aldehyde, and carboxylic acid species by combining an alcohol dehydrogenase with a carboxylic acid reductase to maintain the aldehyde concentration below the toxic levels, yet the reactive aldehyde species are freely available for subsequent aldolase-mediated reaction.

  5. Minireviews

    1. In Situ Formation of Metal Carbide Catalysts

      Megan M. Moyer, Prof. Canan Karakaya, Prof. Robert J. Kee and Prof. Brian G. Trewyn

      Version of Record online: 12 JUL 2017 | DOI: 10.1002/cctc.201700304

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      Let′s make it here: Many catalysts employed in Fischer–Tropsch synthesis, methane dehydroaromatization and biomass conversion reactions require carburization of the metal before becoming active catalyst species. Often this carburization is performed in situ with a carbon containing source gas. This Review aims to look at this process across multiple reactions, highlighting influencing factors and recent progress and improvements in the field.

  6. Full Papers

    1. Iron Nanoparticles Embedded in Graphitic Carbon Matrix as Heterogeneous Catalysts for the Oxidative C−N Coupling of Aromatic N−H Compounds and Amides

      Jinbao He, Prof. Dr. Amarajothi Dhakshinamoorthy, Dr. Ana Primo and Prof. Dr. Hermenegildo Garcia

      Version of Record online: 11 JUL 2017 | DOI: 10.1002/cctc.201700429

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      Metals wrapped up in carbon: Carbonaceous MNP@C composites formed from chitosan powders containing first-row transition metal ions can be used as heterogeneous catalysts as evaluated in the oxidative C−N coupling reaction. Fe NP@C appears to be a stable catalyst with a broad scope.

    2. Synthesis and Catalysis of Redox-Active Bis(imino)acenaphthene (BIAN) Iron Complexes

      Matteo Villa, Dr. Dominique Miesel, Dr. Alexander Hildebrandt, Prof. Fabio Ragaini, Dr. Dieter Schaarschmidt and Prof. Axel Jacobi von Wangelin

      Version of Record online: 10 JUL 2017 | DOI: 10.1002/cctc.201700144

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      Ironing out ligand differences: A set of redox-active tetrahedral and octahedral bis(imino)acenaphthene (BIAN) iron(II) complexes was prepared and fully characterized. The complexes exhibited reversible BIAN-centered 1 e reductions and could be applied to catalytic hydrogenations of bulky alkenes upon reductive activation.

    3. Polymer Encapsulated Cobalt-Based Catalysts (Co EnCatTM) for Selective Continuous Hydrogenation of 1-Iodo-4-nitrobenzene

      Dr. Hannes Alex, Dr. Patrick Loos, Dr. Todor Baramov, Dr. John Barry, Tanmay Godiawala, Dr. Jorma Hassfeld and Dr. Norbert Steinfeldt

      Version of Record online: 6 JUL 2017 | DOI: 10.1002/cctc.201700391

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      Polyurea microencapsulated Co catalysts: Cobalt and cobalt/nickel encapsulated in a polyurea matrix show high selectivity to 4-iodoaniline and low levels of dehalogenation in the hydrogenation of 1-iodo-4-nitrobenzene. The low level of dehalogenation makes this material interesting for the hydrogenation of nitroaromatics bearing labile groups as substituents on the phenyl ring. Catalytic performance depends on metal loading and type of alloy used for the catalyst preparation.

    4. Insight into Copper Oxide-Tin Oxide Catalysts for the Catalytic Oxidation of Carbon Monoxide: Identification of Active Copper Species and a Reaction Mechanism

      Xueqin Bai, Shujing Chai, Dr. Cheng Liu, Kui Ma, Qingpeng Cheng, Dr. Ye Tian, Prof. Dr. Tong Ding, Dr. Zheng Jiang, Dr. Jing Zhang, Dr. Lirong Zheng and Prof. Dr. Xingang Li

      Version of Record online: 6 JUL 2017 | DOI: 10.1002/cctc.201700460

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      When oxides oxidize: CuO-SnO2 catalysts show a high activity and water resistance for the catalytic oxidation of CO. Three Cu species are identified on the catalysts, and the highly dispersed Cu, as well as the surface lattice oxygen, is the active site for the catalytic oxidation of CO. The reaction mechanism follows the Mars–van Krevelen model.

  7. Communications

    1. Highly Efficient Atom-Economic Synthesis of Chiral Bis(indolyl)methanes Bearing Quaternary Stereogenic Carbon Centers

      Yan Zhang, Si-Xiang Zhang, Li-Na Fu and Prof. Dr. Qi-Xiang Guo

      Version of Record online: 6 JUL 2017 | DOI: 10.1002/cctc.201700368

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      Dol-ing out: The chiral Brønsted acid catalyzed Friedel–Crafts reaction of 3-vinylindole with substituted indoles is an efficient method to build chiral 3,3′-bis(indolyl)methanes (BIMs). Structurally divers BIMs with quaternary stereogenic carbon centers are produced in excellent yields with excellent enantioselectivities.

    2. Core–Shell-Structured NiS2@Ni-Bi Nanoarray for Efficient Water Oxidation at Near-Neutral pH

      Xiao Ma, Min Ma, Danni Liu, Shuai Hao, Prof. Fengli Qu, Prof. Gu Du, Prof. Abdullah M. Asiri and Prof. Xuping Sun

      Version of Record online: 6 JUL 2017 | DOI: 10.1002/cctc.201700350

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      Realizing the potential: A core–shell-structured NiS2@Ni-Bi nanoarray on carbon cloth (NiS2@Ni-Bi/CC) is derived from the NiS2 nanoarray on carbon cloth (NiS2/CC) by oxidative polarization in 0.1 m K-Bi. In near-neutral electrolyte, NiS2@Ni-Bi/CC behaves as a durable catalyst electrode for the oxygen evolution reaction with the need of an overpotential of only 486 mV to drive a geometrical catalytic current density of 20 mA cm−2.

  8. Full Papers

    1. Polymorphous ZnO Nanostructures: Zn Polar Surface-Guided Size and Shape Evolution Mechanism and Enhanced Photocatalytic Activity

      Yanting Zhao, Tingting Cui, Tong Wu, Chen Jin, Prof. Ru Qiao, Yao Qian and Prof. Guoxiu Tong

      Version of Record online: 6 JUL 2017 | DOI: 10.1002/cctc.201700135

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      Nanobowls, -rings, and -seals: A simple, low-temperature chemical etching method for selective preparation of monodispersed, hexagonal, single-crystal ZnO nanostructures is reported. The relationship among the morphology, dimensions, and function of ZnO was determined by investigating polar planes, surface areas, energy bands, defects, optical properties, and catalytic activity for rhodamine B degradation.

    2. Oxidized Lignin Depolymerization using Formate Ionic Liquid as Catalyst and Solvent

      Jinhuo Dai, Prof. Antonio F. Patti, Lionel Longé, Prof. Gil Garnier and Dr. Kei Saito

      Version of Record online: 4 JUL 2017 | DOI: 10.1002/cctc.201700632

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      Ionic is on it: An ionic liquid, 2-hydroxyammonium formate, was reported for use both as a solvent and as catalyst to depolymerize oxidized lignin. A novel oxidative degradation of lignin using a formate ionic liquid was investigated resulting in ethyl acetate soluble and also water-soluble depolymerized lignin products.

    3. Very Important Paper

      Experimental and First-Principles Evidence for Interfacial Activity of Ru/TiO2 for the Direct Conversion of m-Cresol to Toluene

      Taiwo O. Omotoso, Byeongjin Baek, Prof. Lars C. Grabow and Prof. Steven P. Crossley

      Version of Record online: 3 JUL 2017 | DOI: 10.1002/cctc.201700157

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      Break it! A combination of theory and experiments were used to investigate the nature of the active site for the selective transformation of m-cresol to toluene. Through variation of metal loading, particle size and support phase, it was demonstrated that sites responsible for direct C−O cleavage lie at the perimeter of the metal particle.

    4. Glycerol Isopropyl Ethers: Direct Synthesis from Alcohols and Synthesis by the Reduction of Solketal

      Vadim O. Samoilov, Dr. Maria O. Onishchenko, Dr. Dzhamalutdin N. Ramazanov and Prof. Dr. Anton L. Maximov

      Version of Record online: 3 JUL 2017 | DOI: 10.1002/cctc.201700108

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      A roundabout route: Solketal was hydrogenated under mild conditions over Pd-doped mesoporous aluminosilicas to yield a mixture of ethers and the isopropyl ether of solketal with high selectivity and yield. For high activity and selectivity, the balance between reductive and acid catalytic functions is essential. The significance of the approach for glycerol hydrophobization is discussed in comparison with the traditional acid-catalyzed route.

    5. Catalytic Dehydration of Fructose into 5-Hydroxymethylfurfural by a DMSO-like Polymeric Solid Organocatalyst

      Xiawei Guo, Jinqiang Tang, Bo Xiang, Dr. Liangfang Zhu, Prof. Huaqing Yang and Prof. Changwei Hu

      Version of Record online: 3 JUL 2017 | DOI: 10.1002/cctc.201700136

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      Mimicking DMSO: An unprecedented DMSO-like polymer catalyst Au@polythiophene–polythiophene oxides is developed for effective dehydration of fructose into 5-hydroxymethylfurfural (HMF) in low-boiling 1,4-dioxane or water, over which the side-reaction of HMF rehydration to levulinic acid is thoroughly suppressed.

  9. Communications

    1. Platinum-Catalyzed Multicomponent Alcoholysis/Hydrosilylation and Bis-hydrosilylation of Alkynes with Dihydrosilanes

      Jian-Xing Xu, Mu-Yi Chen, Dr. Zhan-Jiang Zheng, Dr. Jian Cao, Dr. Zheng Xu, Dr. Yu-Ming Cui and Prof. Dr. Li-Wen Xu

      Version of Record online: 3 JUL 2017 | DOI: 10.1002/cctc.201700390

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      Controllable hydrosilylation: The powerful potential of a monophosphine ligand bearing a silicon-based bulky group, called TBSO-MOP, in the chemoselectivity-controllable platinum-catalyzed multicomponent hydrosilylation of alkynes with dihydrosilanes is revealed. (E)-Vinylsilyl ethers and di-(E)-vinylsilanes are obtained in high yields from internal and terminal alkynes, respectively. dba=dibenzylideneacetone.

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