ChemPlusChem

Cover image for Vol. 78 Issue 4

April 2013

Volume 78, Issue 4

Pages 279–381

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Cover Profile
    4. Graphical Abstract
    5. Masthead
    6. News
    7. Full Papers
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      Cover Picture: Direct Fluorination of Cyclic Carbonates and closo-K2[B12H12] in a Slug-Flow Ministructured Reactor (ChemPlusChem 4/2013) (page 279)

      Mathias Hill, Patrick Baron, Dr. Keith Cobry, Sascha K. Goll, Dr. Philipp Lang, Prof. Carsten Knapp, Dr. Harald Scherer, Prof. Peter Woias, Pengcheng Zhang and Prof. Ingo Krossing

      Version of Record online: 8 APR 2013 | DOI: 10.1002/cplu.201390014

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      The cover picture shows a two phase minireactor used for the direct fluorination of cyclic carbonates and the closo-K2[B12H12] cluster as described by I. Krossing and co-workers in a Full Paper on page 292 ff. The four different layers of the minireactor are shown and the reactor channel plate is enlarged as a top view. Also shown is the gas/liquid slug flow within the channel. The molecules shown are calculated structures of ethylene carbonate and its monofluorinated isomer. The background is a picture of the Rhine Falls (Schaffhausen, Switzerland), which is the largest waterfall in Europe and symbolizes flow chemistry and the wild nature of the direct fluorination reaction.

  2. Cover Profile

    1. Top of page
    2. Cover Picture
    3. Cover Profile
    4. Graphical Abstract
    5. Masthead
    6. News
    7. Full Papers
    1. You have free access to this content
      Direct Fluorination of Cyclic Carbonates and closo-K2[B12H12] in a Slug-Flow Ministructured Reactor (page 280)

      Mathias Hill, Patrick Baron, Dr. Keith Cobry, Sascha K. Goll, Dr. Philipp Lang, Prof. Carsten Knapp, Dr. Harald Scherer, Prof. Peter Woias, Pengcheng Zhang and Prof. Ingo Krossing

      Version of Record online: 19 MAR 2013 | DOI: 10.1002/cplu.201300055

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      “Fluorine plays an important role in chemistry as well as in material and life sciences.” This and more about the story behind the front cover can be found on page 280.

  3. Graphical Abstract

    1. Top of page
    2. Cover Picture
    3. Cover Profile
    4. Graphical Abstract
    5. Masthead
    6. News
    7. Full Papers
  4. Masthead

    1. Top of page
    2. Cover Picture
    3. Cover Profile
    4. Graphical Abstract
    5. Masthead
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    1. Masthead: ChemPlusChem 4/2013 (page 287)

      Version of Record online: 8 APR 2013 | DOI: 10.1002/cplu.201390016

  5. News

    1. Top of page
    2. Cover Picture
    3. Cover Profile
    4. Graphical Abstract
    5. Masthead
    6. News
    7. Full Papers
  6. Full Papers

    1. Top of page
    2. Cover Picture
    3. Cover Profile
    4. Graphical Abstract
    5. Masthead
    6. News
    7. Full Papers
    1. Direct Fluorination of Cyclic Carbonates and closo-K2[B12H12] in a Slug-Flow Ministructured Reactor (pages 292–301)

      Mathias Hill, Patrick Baron, Dr. Keith Cobry, Sascha K. Goll, Dr. Philipp Lang, Prof. Carsten Knapp, Dr. Harald Scherer, Prof. Peter Woias, Pengcheng Zhang and Prof. Ingo Krossing

      Version of Record online: 19 FEB 2013 | DOI: 10.1002/cplu.201200267

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      A novel multiphase minireactor was used for direct fluorination of ethylene carbonate, propylene carbonate, and closo-K2[B12H12]. The results of the direct fluorination reactions are presented and calculated Gibbs free energies for the cyclic carbonates are discussed. It followed that cyclic carbonates are also possible solvents for the fluorination of ionic substrates, for example closo-K2[B12H12]. The figure shows a schematic view of the reactor and its function.

    2. Synthesis of Anatase Se/Te-TiO2 Nanorods with Dominant {100} Facets: Photocatalytic and Antibacterial Activity Induced by Visible Light (pages 302–309)

      Dr. Zong-Hong Lin, Prathik Roy, Zih-Yu Shih, Dr. Chung-Mao Ou and Prof. Huan-Tsung Chang

      Version of Record online: 21 JAN 2013 | DOI: 10.1002/cplu.201200281

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      Antibacterial agents: Te–TiO2 and Sen/Te–TiO2 nanorods (NRs) with exposed {100} facets are efficient photocatalysts and antibacterial agents against E. coli and S. aureus (see graph; background of red fluorescent stains represents dead or compromised cells). The activity mainly results from the generation of ⋅OH, TeO32−, and SeO32− ions.

    3. Regioselective Nitration of Aromatics with Nanomagnetic Solid Superacid SO42−/ZrO2-MxOy-Fe3O4 and Its Theoretical Studies (pages 310–317)

      Peng Cheng Wang, Jie Zhu, Xiang Liu, Ting Ting Lu and Prof. Ming Lu

      Version of Record online: 12 FEB 2013 | DOI: 10.1002/cplu.201300001

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      Super acids: A series of micro- and nanosulfated zirconia loaded with Fe3O4 and other metal oxides (SO42−/ZrO2-MxOy-Fe3O4) have been prepared and characterized. Nitration experiments with these solid acids were carried out to achieve the optimal conditions and their performances were evaluated. By taking the nitration of chlorobenzene as an example, theoretical calculations were used to investigate the interaction between transition metals and chlorobenzene (see figure).

    4. A Conductive Polypyrrole-Coated, Sulfur–Carbon Nanotube Composite for Use in Lithium–Sulfur Batteries (pages 318–324)

      Dr. Jiazhao Wang, Lin Lu, Dr. Dongqi Shi, Richard Tandiono, Prof. Zhaoxiang Wang, Dr. Konstantin Konstantinov and Prof. Huakun Liu

      Version of Record online: 27 FEB 2013 | DOI: 10.1002/cplu.201200293

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      Battery powered: The title composite (see figure) was prepared and investigated as a cathode material for Li–S batteries. The conducting polypyrrole coating serves to confine polysulfides and prevent them from dissolving into the electrolyte. The capacity of S-CNT-PPy is about 600 mAh g−1 after 40 cycles, which is much higher than for the S-CNT composite (430 mAh g−1)

    5. Selective Synthesis of DOPA and DOPA Peptides by Native and Immobilized Tyrosinase in Organic Solvent (pages 325–330)

      Dr. Giorgia Botta, Dr. Michela Delfino, Dr. Melissa Guazzaroni, Dr. Claudia Crestini, Prof. Dr. Silvano Onofri and Prof. Dr. Raffaele Saladino

      Version of Record online: 21 FEB 2013 | DOI: 10.1002/cplu.201200300

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      A direct route: Bioactive catechol derivatives, such as Boc-Gly-DOPA-OMe (Boc=tert-butoxycarbonyl, DOPA=3,4-dihydroxyphenylalanine), have been synthesized from the corresponding L-tyrosine (Tyr) derivatives (see scheme). The oxidation is performed with immobilized tyrosinase, from Agaricus bisporus, in CH2Cl2/buffer at room temperature under an O2 atmosphere.

    6. The Gelling Ability of Some Diimidazolium Salts: Effect of Isomeric Substitution of the Cation and Anion (pages 331–342)

      Dr. Francesca D'Anna, Paola Vitale, Dr. Francesco Ferrante, Dr. Salvatore Marullo and Prof. Renato Noto

      Version of Record online: 1 MAR 2013 | DOI: 10.1002/cplu.201300016

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      A phase it′s going through: Gel phases formed by geminal diimidazolium salts have been investigated as a function of the isomeric substitution on both cation and anion (see figure; NDS=naphthalenedisulfonate). The cation structure rules gelling behavior, whereas the anion structure determines the gel-phase properties.

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      Dioximate- and Bis(salicylaldiminate)-Bridged Titanium and Zirconium Alkoxides: Structure Elucidation by Mass Spectrometry (pages 343–351)

      Dr. Christian Maurer, Dr. Ernst Pittenauer, Dr. Michael Puchberger, Prof. Dr. Günter Allmaier and Prof. Dr. Ulrich Schubert

      Version of Record online: 27 FEB 2013 | DOI: 10.1002/cplu.201300014

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      Building bridges: Modification of titanium and zirconium alkoxides with various dioximes and bis(salicylaldimines) resulted in dimeric complexes, in which the ligands bridge the metal alkoxide moieties (see figure; O red, N blue). ESI mass spectrometry was found to be a powerful tool for structure elucidation of the complexes.

    8. Synthesis of Clickable Water-Soluble Poly(amidoamine) Fullerodendrimers and Their Use for Surface Functionalization of Azido-Coated Polymer Nanoparticles (pages 352–363)

      Guillaume Rousseau, Dr. Hélène Fensterbank, Dr. Krystyna Baczko, Dr. Manuel Cano, Dr. Ingrid Stenger, Prof. Chantal Larpent and Dr. Emmanuel Allard

      Version of Record online: 19 MAR 2013 | DOI: 10.1002/cplu.201300045

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      Taking sides: The synthesis of clickable water-soluble fullerodendrimers that contain on one side a poly(amidoamine) dendron and on the other side an alkyne moiety is presented. This chemical handle is used to immobilize fullerodendrimers on azido-coated nanoparticles (NPs) by means of the copper(I)-catalyzed azide and alkyne cycloaddition reaction and leads to fullerene-rich nanostructures (see figure).

    9. Cubic Mesoporous Silica (SBA-16) Prepared Using Butanol as the Co-Surfactant: A General Matrix for the Preparation of FeCo-SiO2 Nanocomposites (pages 364–374)

      Dr. Daniela Carta, Dr. Salvatore Bullita, Dr. Maria F. Casula, Dr. Alberto Casu, Dr. Andrea Falqui and Prof. Anna Corrias

      Version of Record online: 19 MAR 2013 | DOI: 10.1002/cplu.201200283

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      The host with the most: The picture shows the three-dimensional image reconstruction of a nanocomposite based on mesoporous SBA-16 silica as obtained by electron tomography. Evidence is provided that FeCo nanocrystals are located inside the highly ordered interconnected mesostructure with cubic symmetry

    10. Controllable Assembly and Dehydrogenation Catalysis Activity of Urchinlike FeNi–Ru(tips) Amorphous Alloy Hierarchical Nanostructures (pages 375–381)

      Yuzhen Sun, Prof. Ming Wen, Prof. Qingsheng Wu and Qingnan Wu

      Version of Record online: 19 MAR 2013 | DOI: 10.1002/cplu.201200297

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      Feeling tips-y: Newly designed magnetic urchinlike FeNi–Ru(tips) hierarchical nanostructures, synthesized through a controllable assembly process, exhibit excellent catalytic activity toward the hydrolytic dehydrogenation of aqueous NaBH4 under ambient atmosphere at room temperature (see figure).

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