ChemCatChem

Cover image for Vol. 2 Issue 3

March 8, 2010

Volume 2, Issue 3

Pages 229–347

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Graphical Abstract
    5. News
    6. Highlights
    7. Concept
    8. Communications
    9. Full Papers
    10. Book Reviews
    11. Preview
    1. Cover Picture: Highly Unsaturated CrII/SiO2 Single-Site Catalysts for Reducing Nitrogen Oxides with CO: Reaction Intermediates and Catalytic Cycle (ChemCatChem 3/2010) (page 229)

      Adriano Zecchina, Carlos Otero Areán and Elena Groppo

      Article first published online: 3 MAR 2010 | DOI: 10.1002/cctc.201090009

      Thumbnail image of graphical abstract

      The cover picture shows a proposed reaction mechanism for the reduction of nitrogen oxides with CO over a silica-supported chromia catalyst. In their Communication on page 259 ff., Groppo et al. demonstrate the potential of single CrII active sites in this reaction. The use of FTIR spectroscopy allows identification of the intermediate species and also shows that the mechanism, incorporating three coupled catalytic cycles, depends on the NO/CO reactant ratio.

  2. Inside Cover

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Graphical Abstract
    5. News
    6. Highlights
    7. Concept
    8. Communications
    9. Full Papers
    10. Book Reviews
    11. Preview
    1. Inside Cover: A Comparative In Situ HP-FTIR Spectroscopic Study of Bi- and Monodentate Phosphite-Modified Hydroformylation (ChemCatChem 3/2010) (page 230)

      Christoph Kubis, Ralf Ludwig, Mathias Sawall, Klaus Neymeyr, Armin Börner, Klaus-Diether Wiese, Dieter Hess, Robert Franke and Detlef Selent

      Article first published online: 3 MAR 2010 | DOI: 10.1002/cctc.201090010

      Thumbnail image of graphical abstract

      The rhodium-catalyzed hydroformylation of 3,3-dimethyl-1-butene is monitored by in situ, high-pressure FTIR spectroscopy, as pictured, giving time-dependent concentration profiles of organic components and metal–organic reaction intermediates. In their paper on page 287 ff., Selent et al. offer an improved perception of mono- and diphosphite-modified catalysis.

  3. Graphical Abstract

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Graphical Abstract
    5. News
    6. Highlights
    7. Concept
    8. Communications
    9. Full Papers
    10. Book Reviews
    11. Preview
    1. Graphical Abstract: ChemCatChem 3/2010 (pages 231–236)

      Article first published online: 3 MAR 2010 | DOI: 10.1002/cctc.201090011

  4. News

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Graphical Abstract
    5. News
    6. Highlights
    7. Concept
    8. Communications
    9. Full Papers
    10. Book Reviews
    11. Preview
  5. Highlights

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Graphical Abstract
    5. News
    6. Highlights
    7. Concept
    8. Communications
    9. Full Papers
    10. Book Reviews
    11. Preview
    1. Suzuki–Miyaura Couplings on Proteins: A Simple and Ready-to-use Catalytic System in Water (pages 243–245)

      Verena Böhrsch  and Christian P. R. Hackenberger

      Article first published online: 28 DEC 2009 | DOI: 10.1002/cctc.200900300

      Thumbnail image of graphical abstract

      A perfect couple: A catalytic system for the Suzuki–Miyaura coupling has been developed, which simplifies the application of the reaction to biologically relevant compounds such as proteins in aqueous media at low temperatures.

    2. A New, Yet Familiar, Lamellar Zeolite (pages 246–248)

      Michael Tsapatsis and Wei Fan

      Article first published online: 10 FEB 2010 | DOI: 10.1002/cctc.200900278

      Thumbnail image of graphical abstract

      Compulsive layers: Lamellar zeolites are crystalline layered materials with porosity within the layers. A recent breakthrough regarding the synthesis of a new lamellar zeolite with the well-known ZSM-5 structure is highlighted in light of previous work on lamellar zeolites and the emerging applications of hierarchical zeolites and zeolitic layers, which include heterogeneous catalysis and zeolite membranes.

  6. Concept

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Graphical Abstract
    5. News
    6. Highlights
    7. Concept
    8. Communications
    9. Full Papers
    10. Book Reviews
    11. Preview
    1. Next-Generation Catalysis for Renewables: Combining Enzymatic with Inorganic Heterogeneous Catalysis for Bulk Chemical Production (pages 249–258)

      Peter N. R. Vennestrøm, Claus H. Christensen, Sven Pedersen, Jan-Dierk Grunwaldt and John M. Woodley

      Article first published online: 22 FEB 2010 | DOI: 10.1002/cctc.200900248

      Thumbnail image of graphical abstract

      In a future chemical industry based on biorenewable resources, new chemical transformation routes are required to convert this class of materials into new chemical building blocks. Considerations on combining heterogeneous chemoenzymatic systems are given with special emphasis on oxidase systems with the unique ability to produce and use hydrogen peroxide in situ.

  7. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Graphical Abstract
    5. News
    6. Highlights
    7. Concept
    8. Communications
    9. Full Papers
    10. Book Reviews
    11. Preview
    1. Highly Unsaturated CrII/SiO2 Single-Site Catalysts for Reducing Nitrogen Oxides with CO: Reaction Intermediates and Catalytic Cycle (pages 259–262)

      Adriano Zecchina, Carlos Otero Areán and Elena Groppo

      Article first published online: 28 JAN 2010 | DOI: 10.1002/cctc.200900295

      Thumbnail image of graphical abstract

      Wherefore art thou, Chromia? Owing to the redox chemistry of CrII and the high coordinative unsaturation of the metal cation forming the active site, silica-supported chromia acts as a single-site catalyst for the reduction of nitrogen oxides by CO. The mechanism is elucidated by surface FTIR spectroscopy, which also allows characterization of the intermediate species involved in three coupled catalytic cycles.

    2. You have free access to this content
      Improved Fitness of Arabidopsis thaliana Nitrilase 2 (pages 263–267)

      Ulrike Schreiner, Georg Steinkellner, J. David Rozzell, Anton Glieder and Margit Winkler

      Article first published online: 27 JAN 2010 | DOI: 10.1002/cctc.200900212

      Thumbnail image of graphical abstract

      A matter of fitness: An Arabidopsis thaliana nitrilase 2 (NIT2) variant with improved specific activity is generated by error prone PCR followed by recombination of advantageous mutations. The improvement is shown not only for the test substrate phenylacetonitrile but also for a diverse set of aromatic nitriles, dicyanides, and other functionalized nitriles.

    3. Preparation of Cubic Pt Nanoparticles deposited on Alumina and their Application to Propene Hydrogenation (pages 268–271)

      Mostafa A. El-Sayed and Jung Whan Yoo

      Article first published online: 10 FEB 2010 | DOI: 10.1002/cctc.200900247

      Thumbnail image of graphical abstract

      Propene hydrogenation over cubic Pt nanoparticles (NPs) is carried out to evaluate their catalytic performance. The value of the activation energy is found to be 9.7±0.5 kcal mol−1, which is discussed by comparing it to those of encapsulated and truncated octahedral Pt NPs deposited on alumina.

  8. Full Papers

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Graphical Abstract
    5. News
    6. Highlights
    7. Concept
    8. Communications
    9. Full Papers
    10. Book Reviews
    11. Preview
    1. Reaction Monitoring of Heterogeneously Catalyzed Hydrogenation of Imines by Coupled ATR-FTIR, UV/Vis, and Raman Spectroscopy (pages 273–280)

      Leif R. Knöpke, Navid Nemati, Angela Köckritz, Angelika Brückner and Ursula Bentrup

      Article first published online: 18 JAN 2010 | DOI: 10.1002/cctc.200900273

      Thumbnail image of graphical abstract

      Operando spectroscopy: A setup is presented that enables simultaneous in situ ATR-FTIR, UV/Vis, and Raman spectroscopic measurements by implementation of spectroscopic immersion probes into a modified autoclave reactor. This setup allows the monitoring of liquid-phase hydrogenation reactions under elevated H2 pressures.

    2. Influence of Support Hydroxides on the Catalytic Activity of Oxidized Gold Clusters (pages 281–286)

      Gabriel M. Veith, Andrew R. Lupini, Stephen J. Pennycook and Nancy J. Dudney

      Article first published online: 5 JAN 2010 | DOI: 10.1002/cctc.200900243

      Thumbnail image of graphical abstract

      OH, what a catalyst! Gold oxide nanoparticles grown on natural and hydroxylated TiO2 were investigated for CO oxidation. Although clusters were grown with similar sizes, their activities differed by a factor of at least 180, depending on the degree of hydroxylation. Hydroxy groups are coincidentally introduced during the solution-phase synthesis of the catalysts and are critical for activity.

    3. A Comparative In Situ HP-FTIR Spectroscopic Study of Bi- and Monodentate Phosphite-Modified Hydroformylation (pages 287–295)

      Christoph Kubis, Ralf Ludwig, Mathias Sawall, Klaus Neymeyr, Armin Börner, Klaus-Diether Wiese, Dieter Hess, Robert Franke and Detlef Selent

      Article first published online: 18 FEB 2010 | DOI: 10.1002/cctc.200900292

      Thumbnail image of graphical abstract

      Reaction progress fully monitored: During Rh-catalyzed hydroformylation, the olefin concentration determines the ratio of monophosphite hydride and acyl intermediates detected simultaneously. Saturation kinetics are observed for the first time using a diphosphite. Within this regime, the bidentate ligand induces a turnover frequency of 1040 h-1 compared to 237 h-1 for the monophosphite, at 30 °C.

    4. Direct Arylation of Heterocycles: The Performances of Ferrocene-Based Polyphosphane Ligands in Palladium-Catalyzed C[BOND]H Bond Activation (pages 296–305)

      Julien Roger, Sophal Mom, Matthieu Beaupérin, Sylviane Royer, Philippe Meunier, Vladimir V. Ivanov, Henri Doucet and Jean-Cyrille Hierso

      Article first published online: 2 FEB 2010 | DOI: 10.1002/cctc.200900294

      Thumbnail image of graphical abstract

      The palladium-catalyzed direct arylation of heterocycles with deactivated bromoarenes is promoted by ferrocenyl polyphosphanes. Among five candidates, a triphosphane is the most effective for the C[BOND]H activation and C[BOND]C coupling. Its coordination behavior towards group 10 metals shows an unprecedented combination of cis chelating and bis-trans-monodentate bonding.

    5. Metal Triflates as Highly Stable and Active Catalysts for the “Immortal” Ring-Opening Polymerization of Trimethylene Carbonate (pages 306–313)

      Marion Helou, Olivier Miserque, Jean-Michel Brusson, Jean-François Carpentier and Sophie M. Guillaume

      Article first published online: 20 JAN 2010 | DOI: 10.1002/cctc.200900279

      Thumbnail image of graphical abstract

      ROP ′til you drop: The “immortal” ring-opening polymerization of trimethylene carbonate, using a two-component catalyst system based on a metal triflate and an alcohol as co-initiator and chain-transfer agent, proceeds in bulk with high activities (TOF up to 28 200 h−1) and productivities (TON up to 45 000). Due to the water-tolerance of these systems, experimental operating conditions do not require any special care.

    6. You have free access to this content
      Impact of Organic Interlayer Anions in Hydrotalcite Precursor on the Catalytic Activity of Hydrotalcite-Derived Mixed Oxides (pages 314–321)

      Oliver Meyer, Frank Roessner, Rainer A. Rakoczy and Richard W. Fischer

      Article first published online: 5 JAN 2010 | DOI: 10.1002/cctc.200900257

      Thumbnail image of graphical abstract

      An underestimated impact: Hydrotalcites containing different organic interlayer anions have been synthesized and the derived mixed oxides applied as catalysts in the transesterification of glycerol trioctanoate with methanol to octanoic acid methyl ester. Large differences in the obtained methyl ester yields revealed a great impact of the precursor anions on catalytic activity of hydrotalcite-derived mixed oxides.

    7. Physical and Chemical Lipase Adsorption on SBA-15: Effect of Different Interactions on Enzyme Loading and Catalytic Performance (pages 322–329)

      Andrea Salis, Maria F. Casula, Mani S. Bhattacharyya, Marcella Pinna, Vincenzo Solinas and Maura Monduzzi

      Article first published online: 17 FEB 2010 | DOI: 10.1002/cctc.200900288

      Thumbnail image of graphical abstract

      On HMS's secret surface: SBA-15 hexagonal mesoporous silica (HMS) was used for the immobilization of Pseudomonas fluorescens lipase. The chemically and physically immobilized enzymes were successfully used for biocatalytic production of biodiesel, leading to almost full conversion of sunflower oil and ethanol into the corresponding ethyl esters, and were reused for several cycles.

    8. Simultaneous Elimination of Pyrophoricity and Enhancement of Activity of Raney Nickel by Carbon Deposition: Synthesis of Highly Active NiC Catalysts (pages 330–335)

      Nagendranath Mahata, Adelino F. Cunha, José J. M. Órfão and José L. Figueiredo

      Article first published online: 28 JAN 2010 | DOI: 10.1002/cctc.200900299

      Thumbnail image of graphical abstract

      In good NiC: Nickel–carbon composite catalysts were synthesized by controlled carbon deposition over Raney nickel. The use of these catalysts simultaneously eliminates pyrophoricity and enhances the activity in comparison to Raney nickel. The catalysts are stable under normal atmospheric condition and exhibit excellent activity, superior to the parent Raney nickel, in the hydrogenation of several organic substrates.

    9. Mechanism of CO Disproportionation on Reduced Ceria (pages 336–341)

      Yi Liu, Cun Wen, Yun Guo, Xiaohui Liu, Jiawen Ren, Guanzhong Lu and Yanqin Wang

      Article first published online: 28 JAN 2010 | DOI: 10.1002/cctc.200900246

      Thumbnail image of graphical abstract

      Disproportionate representation: In CO disproportionation on reduced ceria, adjacent adsorbed CO molecules couple together. Upon C[BOND]O bond dissociation, asymmetrical inorganic carboxylate species, the key reaction intermediates, are formed. The unpaired electrons, which are produced by reduction of the ceria surface, weaken the C[BOND]O bond adsorbed onto Ce3+ through back- donation of electrons.

  9. Book Reviews

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Graphical Abstract
    5. News
    6. Highlights
    7. Concept
    8. Communications
    9. Full Papers
    10. Book Reviews
    11. Preview
    1. Catalytic Asymmetric Friedel–Crafts Alkylations. Edited by Marco Bandini and Achille Umani-Ronchi (pages 342–343)

      Rainer Mahrwald

      Article first published online: 3 MAR 2010 | DOI: 10.1002/cctc.201000020

      Thumbnail image of graphical abstract

      Wiley-VCH, Weinheim, 2009. 317 pp., hardcover, € 119.00.—ISBN 978-3-527-32380-7

    2. Reactions at Solid Surfaces. By Gerhard Ertl (page 343)

      Gianfranco Pacchioni

      Article first published online: 3 MAR 2010 | DOI: 10.1002/cctc.201000019

      Thumbnail image of graphical abstract

      John Wiley & Sons, Hoboken, 2009. 208 pp., hardcover, € 57.90.—ISBN 978-0-470-26101-9

  10. Preview

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Graphical Abstract
    5. News
    6. Highlights
    7. Concept
    8. Communications
    9. Full Papers
    10. Book Reviews
    11. Preview
    1. Preview: ChemCatChem 4/2010 (page 347)

      Article first published online: 3 MAR 2010 | DOI: 10.1002/cctc.201090013

SEARCH

SEARCH BY CITATION