ChemPhysChem

Cover image for Vol. 14 Issue 18

December 16, 2013

Volume 14, Issue 18

Pages 4025–4176

  1. Cover Pictures

    1. Top of page
    2. Cover Pictures
    3. Graphical Abstract
    4. News
    5. Review
    6. Communications
    7. Articles
    1. You have free access to this content
      Cover Picture: Selective Synthesis of Silver Nanoparticles onto Potassium Hexaniobate: Structural Organisation with Bactericidal Properties (ChemPhysChem 18/2013) (page 4025)

      Dr. Juliana Martins de Souza e Silva, Murilo Pastorello, Dr. Jörg Kobarg, Dr. Mateus Borba Cardoso and Prof. Italo Odone Mazali

      Version of Record online: 10 DEC 2013 | DOI: 10.1002/cphc.201390086

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      The cover picture shows an artistic representation of silver nanoparticles assembled on the surface of a hexaniobate crystal, as described by M. B. Cardoso, I. O. Mazali et al. on p. 4075 ff. The silver/hexaniobate crystals are prepared by an eco-friendly method which allows to control the size of the silver nanoparticles and to adjust the bacterial activity of the composite against Escherichia coli. Owing to their bactericidal properties, these silver/hexaniobate crystals are appealing materials for the development of antibacterial surfaces.

    2. You have free access to this content
      Inside Cover: Synthesis and Application of Hydride Silica Composites for Rapid and Facile Removal of Aqueous Mercury (ChemPhysChem 18/2013) (page 4026)

      Dr. Kseniia V. Katok, Dr. Raymond L. D. Whitby, Dr. Franck Fayon, Dr. Sylvie Bonnamy, Prof. Sergey V. Mikhalovsky and Prof. Andrew B. Cundy

      Version of Record online: 10 DEC 2013 | DOI: 10.1002/cphc.201390087

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      Mesoporous hydride silica sorbents that exhibit rapid redox removal of ionic mercury from aqueous solutions are presented on p. 4126 ff. by K. V. Katok et al. and suggested as potential candidates for materials that can be used for mercury decontamination in natural waters and industrial effluents.

  2. Graphical Abstract

    1. Top of page
    2. Cover Pictures
    3. Graphical Abstract
    4. News
    5. Review
    6. Communications
    7. Articles
  3. News

    1. Top of page
    2. Cover Pictures
    3. Graphical Abstract
    4. News
    5. Review
    6. Communications
    7. Articles
    1. Prizes and more… (page 4043)

      Version of Record online: 10 DEC 2013 | DOI: 10.1002/cphc.201301102

  4. Review

    1. Top of page
    2. Cover Pictures
    3. Graphical Abstract
    4. News
    5. Review
    6. Communications
    7. Articles
    1. On the Nature of Interactions between Ionic Liquids and Small Amino-Acid-Based Biomolecules (pages 4044–4064)

      Dr. Alesia A. Tietze, Prof. Dr. Frank Bordusa, Dr. Ralf Giernoth, Prof. Dr. Diana Imhof, Prof. Dr. Thomas Lenzer, Dr. Astrid Maaß, Dr. Carmen Mrestani-Klaus, Prof. Dr. Ines Neundorf, Dr. Kawon Oum, Prof. Dr. Dirk Reith and Dr. Annegret Stark

      Version of Record online: 12 NOV 2013 | DOI: 10.1002/cphc.201300736

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      Ionic liquid interactions: This Review gives a comprehensive overview of the current knowledge on the molecular basis and fundamental aspects of the interactions between amino acid-based molecules and ionic liquids, with focus on peptides and miniproteins. Technical (spectroscopy, structural biology) and theoretical (computational chemistry) prerequisites to explain the phenomena reported so far are critically assessed.

  5. Communications

    1. Top of page
    2. Cover Pictures
    3. Graphical Abstract
    4. News
    5. Review
    6. Communications
    7. Articles
    1. Controlled Electroluminescence from Films Composed of Mixed Bio-Composites and Nanotubes (pages 4065–4068)

      Netta Hendler, Elad D. Mentovich, Dr. Bogdan Belgorodsky, Dolev Rimmerman and Prof. Shachar Richter

      Version of Record online: 14 NOV 2013 | DOI: 10.1002/cphc.201300701

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      Good things come in threes: A new type of light emitting bio-composites allowing for the nanometric separation of the active components is demonstrated. A protein with large host–guest capacities is used for the encapsulation of a water-soluble composite dye in a nano-sized shell, which efficiently reduces Förster resonance energy transfer and related mechanisms. Blending of this bio-composite with multi-walled nanotubes increases the charge injection efficiency, in the electro-luminescent device.

    2. Abnormal Photocurrent Response and Enhanced Photocatalytic Activity Induced by Charge Transfer between WS2 Nanosheets and WO3 Nanoparticles (pages 4069–4073)

      Nengjie Huo, Qu Yue, Juehan Yang, Dr. Shengxue Yang and Prof. Jingbo Li

      Version of Record online: 13 NOV 2013 | DOI: 10.1002/cphc.201300680

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      Sun trap: Pure WS2 nanosheets are prepared that exhibit excellent photosensitive properties. After functionalization with WO3 nanoparticles, abnormal photocurrent responses, enhanced photocatalytic activity, and induced photoluminescence is observed

  6. Articles

    1. Top of page
    2. Cover Pictures
    3. Graphical Abstract
    4. News
    5. Review
    6. Communications
    7. Articles
    1. Selective Synthesis of Silver Nanoparticles onto Potassium Hexaniobate: Structural Organisation with Bactericidal Properties (pages 4075–4083)

      Dr. Juliana Martins de Souza e Silva, Murilo Pastorello, Dr. Jörg Kobarg, Dr. Mateus Borba Cardoso and Prof. Italo Odone Mazali

      Version of Record online: 8 NOV 2013 | DOI: 10.1002/cphc.201300855

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      The right size to kill: Silver nanoparticles decorating the surface of hexaniobate crystals are prepared by an eco-friendly method. According to tests against E. coli, silver nanoparticles of distinct sizes interact differently with bacterial cell walls.

    2. Mechanism of Intramolecular Photostabilization in Self-Healing Cyanine Fluorophores (pages 4084–4093)

      Jasper H. M. van der Velde, Dr. Evelyn Ploetz, Matthias Hiermaier, Jens Oelerich, Jan Willem de Vries, Prof. Dr. Gerard Roelfes and Dr. Thorben Cordes

      Version of Record online: 2 DEC 2013 | DOI: 10.1002/cphc.201300785

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      Fluorophore first aid: A single antioxidant in proximity to a Cy5-fluorophore is sufficient for intramolecular photostabilization and the reduction of blinking in single-molecule time traces. Trolox is found to deplete triplet-related dark-states, thereby healing the fluorophore. The proposed mechanism for intramolecular photostabilization is important for the future development of self-healing fluorophores, including their applications in various research fields.

    3. A Rapid Freeze-Quench Setup for Multi-Frequency EPR Spectroscopy of Enzymatic Reactions (pages 4094–4101)

      Dr. Roberta Pievo, Brigitta Angerstein, Dr. Alistair J. Fielding, Dr. Christian Koch, Prof. Dr. Ivo Feussner and Prof. Dr. Marina Bennati

      Version of Record online: 8 NOV 2013 | DOI: 10.1002/cphc.201300714

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      A powerful combination! The performance of a new micro rapid freeze-quench apparatus combined with electron paramagnetic resonance (EPR) spectroscopy is reported, and the ease of setting up a multi-frequency EPR analysis to investigate the kinetics and mechanisms of enzymatic processes is demonstrated.

    4. Synthesis and Third-Order Nonlinear Optical Properties of Triphenylene Derivatives Modified by Click Chemistry (pages 4102–4108)

      Yongsheng Mi, Pengxia Liang, Zhaokui Jin, Dr. Dong Wang and Prof. Dr. Zhou Yang

      Version of Record online: 8 NOV 2013 | DOI: 10.1002/cphc.201300615

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      Asymmetric triphenylene derivatives containing D–π–A structures are successfully synthesized by means of [2+2] cycloaddition–cycloreversion click reactions.

    5. Gas-Phase Spectroscopy of Ferric Heme[BOND]NO Complexes (pages 4109–4113)

      Dr. Jean A. Wyer, Anders V. Jørgensen, Bjarke Møller Pedersen and Prof. Steen Brøndsted Nielsen

      Version of Record online: 25 OCT 2013 | DOI: 10.1002/cphc.201300843

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      Not so innocent: Weakly bound complexes between ferric heme and NO were synthesised in the gas phase, and their absorption measured from photodissociation yields. Opposite absorption trends in the Soret-band are seen upon NO addition to heme ions in vacuo and to ferric heme proteins, demonstrating the perturbing effect of the protein environment or the axial amino acid ligand, in contrast to Q-band absorption, where the environment is nearly innocent.

    6. Spectroscopic Properties and Upconversion Studies in Ho3+/Yb3+ Co-doped Calcium Scandate with Spectrally Pure Green emission (pages 4114–4120)

      Dr. Jing Li, Prof. Jiahua Zhang, Dr. Zhendong Hao, Xia Zhang, Dr. Jihong Zhao and Dr. Yongshi Luo

      Version of Record online: 8 NOV 2013 | DOI: 10.1002/cphc.201300842

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      Pure and simple: Ho3+/Yb3+ co-doped CaSc2O4 is shown to be a promising oxide host for highly efficient upconversion luminescence (UCL), as it exhibits a strong green emission accompanied with a weak red emission, showing perfect green monochromaticity. The UCL mechanism involved is revealed.

    7. Interionic Interactions in Conducting Nanoconfinement (pages 4121–4125)

      Christopher C. Rochester, Alpha A. Lee , Dr. Gunnar Pruessner and Prof. Alexei A. Kornyshev

      Version of Record online: 6 DEC 2013 | DOI: 10.1002/cphc.201300834

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      Screening factor: Interionic interactions in a metallic nanopore are exponentially screened by electrons of the metal, with the screening length proportional to the pore width or diameter. This article investigates how such screening would look in non-ideally metallic electrodes, typical for semi-metallic carbons.

    8. Synthesis and Application of Hydride Silica Composites for Rapid and Facile Removal of Aqueous Mercury (pages 4126–4133)

      Dr. Kseniia V. Katok, Dr. Raymond L. D. Whitby, Dr. Franck Fayon, Dr. Sylvie Bonnamy, Prof. Sergey V. Mikhalovsky and Prof. Andrew B. Cundy

      Version of Record online: 20 NOV 2013 | DOI: 10.1002/cphc.201300832

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      Catch you because I can: Hydride silica adsorbents show efficient and rapid redox-driven removal of ionic mercury from aqueous solution, such as in natural waters and industrial effluents, with a maximum mercury loading of approximately 0.22 and 0.43 mmol of Hg g−1 on mesoporous silica C-120 and polyhedral oligomeric silsesquioxane xerogels, respectively. Adsorption efficiency remains almost constant from pH 2.7 to 7.

    9. Blue-to-Orange Color-Tunable Laser Emission from Tailored Boron-Dipyrromethene Dyes (pages 4134–4142)

      Ixone Esnal, Dr. Ismael Valois-Escamilla, César F. A. Gómez-Durán, Arlette Urías-Benavides, María L. Betancourt-Mendiola, Prof. Iñigo López-Arbeloa, Dr. Jorge Bañuelos, Prof. Inmaculada García-Moreno, Prof. Angel Costela and Prof. Eduardo Peña-Cabrera

      Version of Record online: 20 NOV 2013 | DOI: 10.1002/cphc.201300818

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      Brighter blue–green dyes: The attachment of heteroatoms at the meso position of boron-bipyrromethene (BODIPY) dyes modulates the emission region from orange to blue. Further methylation at positions 3 and 5 improves the laser efficiency, thereby maintaining a high photostability. The combination of both effects leads to BODIPYs with improved laser and fluorescence performance in the blue part of the spectrum.

    10. Effect of the Side-Chain-Distribution Density on the Single-Conjugated-Polymer-Chain Conformation (pages 4143–4148)

      Dr. Zhongjian Hu, Dr. Takuji Adachi, Dr. Young-Gi Lee, Dr. Ryan T. Haws, Dr. Benjamin Hanson, Robert J. Ono, Prof. Christopher W. Bielawski, Prof. Venkat Ganesan, Prof. Peter J. Rossky and Prof. David A. Vanden Bout

      Version of Record online: 14 NOV 2013 | DOI: 10.1002/cphc.201300751

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      A matter of distribution: The morphology of conjugated polymers is not only controlled by the chemistry of the polymer backbone, but also strongly affected by their side chains. A decreased side-chain-distribution density favors the formation of highly ordered single-chain conformations, despite the regiorandom organization of the side chains along the polymer backbone.

    11. Polymeric Heterogeneous Catalysts of Transition-Metal Oxides: Surface Characterization, Physicomechanical Properties, and Catalytic Activity (pages 4149–4157)

      Bui Dinh Nhi, Dr. Renat Maratovich Akhmadullin, Dr. Alfiya Garipovna Akhmadullina, Dr. Yakov Dmitrievich Samuilov and Dr. Svetlana Ivanova Aghajanian

      Version of Record online: 14 NOV 2013 | DOI: 10.1002/cphc.201300733

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      Analysis of catalyst: Various modeling techniques and methodologies are used to characterize the surface and to study the physicomechanical properties and activity of polymeric heterogeneous catalysts of transition-metal oxides. The experimental results indicate that the investigated catalysts can be applied for industrial wastewater treatment.

    12. In situ Generation of Superoxide Anion Radical in Aqueous Medium under Ambient Conditions (pages 4158–4164)

      Uri Stoin, Dr. Alexander I. Shames, Itamar Malka, Prof. Ilana Bar and Prof. Yoel Sasson

      Version of Record online: 21 NOV 2013 | DOI: 10.1002/cphc.201300707

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      Don′t go anywhere: An in situ method for alkali superoxide preparation by using sodium hydroxide and hydrogen peroxide at room temperature, in aqueous solution, and under ambient conditions. This new method generates a renewable superoxide reagent that can be used in wide range of reactions. We substantiate the formation of superoxide radical by using various chemical and physical methods.

    13. Molecular-Level Understanding of Ground- and Excited-State O[BOND]H⋅⋅⋅O Hydrogen Bonding Involving the Tyrosine Side Chain: A Combined High-Resolution Laser Spectroscopy and Quantum Chemistry Study (pages 4165–4176)

      Dr. Himansu S. Biswal, Surjendu Bhattacharyya and Prof. Sanjay Wategaonkar

      Version of Record online: 6 NOV 2013 | DOI: 10.1002/cphc.201300670

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      Weak interactions with impact: A combined high-resolution laser spectroscopy and computational study on model compounds of tyrosine side chains reveals that weak C[BOND]H⋅⋅⋅π hydrogen bonds (see picture) control the structure of the ground and excited state.

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