European Journal of Inorganic Chemistry

Cover image for Vol. 2012 Issue 32

Special Issue: Organic-Inorganic Hybrid Materials: Design and Applications (Cluster Issue)

November 2012

Volume 2012, Issue 32

Pages 5091–5420

Issue edited by: Markus J. Buehler, Pierre Rabu, Andreas Taubert

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Editorials
    4. Essay
    5. Cover Picture
    6. Graphical Abstract
    7. News
    8. Microreviews
    9. Full Papers
    1. You have free access to this content
      Cover Picture: Green Microwave Synthesis of MIL-100(Al, Cr, Fe) Nanoparticles for Thin-Film Elaboration (Eur. J. Inorg. Chem. 32/2012)

      Alfonso García Márquez, Aude Demessence, Ana Eva Platero-Prats, Daniela Heurtaux, Patricia Horcajada, Christian Serre, Jong-San Chang, Gérard Férey, Victor Antonio de la Peña-O'Shea, Cédric Boissière, David Grosso and Clément Sanchez

      Article first published online: 5 NOV 2012 | DOI: 10.1002/ejic.201290101

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      The front cover picture shows nanoparticles of mesoporous metal trimesate MIL-100(Al, Cr or Fe) metal–organic framework, which were synthesized by a microwave-assisted solvothermal route using green solvents. The optimization of yield, crystallinity, and particle size was achieved through the control of synthetic parameters. The particle size strongly depends on the nature of the metallic cation and the organic precursor, leading to nanoparticles smaller than 100 nm for iron- and chromium-based MIL-100 . Finally, stable colloidal solutions of iron and chromium MIL-100 nanoparticles were obtained to prepare thin films of high optical quality by dip coating, and their porosity was investigated by environmental ellipsometry. Details are discussed in the article by P. Horcajada, C. Serre, C. Boissière et al. on p. 5165 ff.

    2. You have free access to this content
      Inside Cover Picture: Silica Biomorphs: Complex Biomimetic Hybrid Materials from “Sand and Chalk” (Eur. J. Inorg. Chem. 32/2012)

      Matthias Kellermeier, Helmut Cölfen and Juan Manuel García-Ruiz

      Article first published online: 5 NOV 2012 | DOI: 10.1002/ejic.201290102

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      The inside cover picture shows a polarized optical micrograph of twisted barium carbonate crystal aggregates grown spontaneously under the influence of silica in a gel matrix. These so-called silica biomorphs are unique self-assembled hybrid materials displaying complex shapes and elaborate crystal textures reminiscent of biological architectures – despite their purely inorganic origin. Details of the processes leading to the formation of these fascinating biomimetic structures, their mode of construction, as well as possible applications are highlighted in the Microreview by M. Kellermeier, H. Cölfen, and J. M. García-Ruiz. on p. 5123 ff.

  2. Editorials

    1. Top of page
    2. Cover Picture
    3. Editorials
    4. Essay
    5. Cover Picture
    6. Graphical Abstract
    7. News
    8. Microreviews
    9. Full Papers
    1. Hybrid Materials: All the World Is Your Stage! (page 5091)

      Karen Hindson

      Article first published online: 5 NOV 2012 | DOI: 10.1002/ejic.201201292

    2. Advanced Hybrid Materials: Design and Applications (pages 5092–5093)

      Markus J. Buehler, Pierre Rabu and Andreas Taubert

      Article first published online: 5 NOV 2012 | DOI: 10.1002/ejic.201201263

  3. Essay

    1. Top of page
    2. Cover Picture
    3. Editorials
    4. Essay
    5. Cover Picture
    6. Graphical Abstract
    7. News
    8. Microreviews
    9. Full Papers
    1. Hybrid Materials

  4. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Editorials
    4. Essay
    5. Cover Picture
    6. Graphical Abstract
    7. News
    8. Microreviews
    9. Full Papers
    1. You have free access to this content
      Back Cover Picture: Strong Organic Bases as Building Blocks of Mesoporous Hybrid Catalysts for C–C Forming Bond Reactions (Eur. J. Inorg. Chem. 32/2012)

      Enrica Gianotti, Urbano Diaz, Alexandra Velty and Avelino Corma

      Article first published online: 5 NOV 2012 | DOI: 10.1002/ejic.201290103

      Thumbnail image of graphical abstract

      The back cover picture shows 1,8-bis(tetramethylguanidino)naphthalene (TMGN) as a neutral organic base that combines the properties of guanidine and the properties of proton sponges. TMGN was used as building block to obtain organic–inorganic silica-based mesoporous hybrids with strong basic properties. By means of a NH4F-catalyzed sol–gel process, the use of surfactants was avoided. The organic base was preserved inside the mesoporous silica network, providing strong basic properties to the hybrid materials. The hybrid materials have shown high conversions and recyclability in Knoevenagel condensations of different methylene compounds and in Henry and Claisen–Schmidt reactions. Details are discussed in the article by A. Corma et al. on p. 5175 ff.

  5. Graphical Abstract

    1. Top of page
    2. Cover Picture
    3. Editorials
    4. Essay
    5. Cover Picture
    6. Graphical Abstract
    7. News
    8. Microreviews
    9. Full Papers
    1. Graphical Abstract: Eur. J. Inorg. Chem. 32/2012 (pages 5108–5116)

      Article first published online: 5 NOV 2012 | DOI: 10.1002/ejic.201290104

  6. News

    1. Top of page
    2. Cover Picture
    3. Editorials
    4. Essay
    5. Cover Picture
    6. Graphical Abstract
    7. News
    8. Microreviews
    9. Full Papers
  7. Microreviews

    1. Top of page
    2. Cover Picture
    3. Editorials
    4. Essay
    5. Cover Picture
    6. Graphical Abstract
    7. News
    8. Microreviews
    9. Full Papers
    1. Silica–Carbonate Materials

      Silica Biomorphs: Complex Biomimetic Hybrid Materials from “Sand and Chalk” (pages 5123–5144)

      Matthias Kellermeier, Helmut Cölfen and Juan Manuel García-Ruiz

      Article first published online: 22 OCT 2012 | DOI: 10.1002/ejic.201201029

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      When crystallized in the presence of silica, alkaline earth carbonates can self-assemble into elaborate nanoparticle superstructures showing curved morphologies and a level of hierarchy reminiscent of biominerals. This review summarizes recent work on these so-called silica biomorphs, focusing on structural aspects and the underlying mechanism of formation.

    2. Infohybrid Systems

      Emerging Strategies in Infohybrid Systems (pages 5145–5143)

      Dae-Hwan Park and Jin-Ho Choy

      Article first published online: 16 OCT 2012 | DOI: 10.1002/ejic.201200785

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      The combination of nano-biomaterial information technology provides logical infohybrid systems to channel identification and communication. The information is encoded inside hybrid components and is then decoded into symbols or an alphanumeric message between the sender and receiver within an interface network.

    3. Hybrid Materials

      Layered Hydroxide–Porphyrin Hybrid Materials: Synthesis, Structure, and Properties (pages 5154–5164)

      Jan Demel and Kamil Lang

      Article first published online: 23 JUL 2012 | DOI: 10.1002/ejic.201200400

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      We provide a comprehensive overview of the synthesis and structural alignment of bulky porphyrin molecules in the interlayer space of layered hydroxide–porphyrin hybrids. Emphasis is placed on the spectral and photophysical properties of intercalated porphyrins and phthalocyanines for photobactericidal purposes, catalysis, and sensing.

  8. Full Papers

    1. Top of page
    2. Cover Picture
    3. Editorials
    4. Essay
    5. Cover Picture
    6. Graphical Abstract
    7. News
    8. Microreviews
    9. Full Papers
    1. Metal–Organic Frameworks

      You have free access to this content
      Green Microwave Synthesis of MIL-100(Al, Cr, Fe) Nanoparticles for Thin-Film Elaboration (pages 5165–5174)

      Alfonso García Márquez, Aude Demessence, Ana Eva Platero-Prats, Daniela Heurtaux, Patricia Horcajada, Christian Serre, Jong-San Chang, Gérard Férey, Victor Antonio de la Peña-O'Shea, Cédric Boissière, David Grosso and Clément Sanchez

      Article first published online: 5 OCT 2012 | DOI: 10.1002/ejic.201200710

      Thumbnail image of graphical abstract

      The syntheses of nanoparticles of mesoporous MIL-100(Al, Cr, or Fe) metal–organic frameworks were performed by a microwave-assisted solvothermal route with green solvents. Stable colloidal solutions of iron and chromium MIL-100 nanoparticles were obtained and used to prepare high optical quality thin films by dip coating. Their porosity was investigated by environmental ellipsometric porosimetry.

    2. Hybrid Catalysts

      Strong Organic Bases as Building Blocks of Mesoporous Hybrid Catalysts for C–C Forming Bond Reactions (pages 5175–5185)

      Enrica Gianotti, Urbano Diaz, Alexandra Velty and Avelino Corma

      Article first published online: 28 SEP 2012 | DOI: 10.1002/ejic.201200716

      Thumbnail image of graphical abstract

      The TMGN/SiO2 hybrid catalyst was synthesized using 1,8-bis(tetramethylguanidino)naphthalene (TMGN). It combines the properties of guanidine and of proton sponges. A functionalized TMGN builder was introduced directly into a nonordered mesoporous silica by the NH4F-catalyzed sol–gel route. This catalyst shows good catalytic performances in C–C bond forming reactions.

    3. Bio-Nanohybrids

      Lipid-Based Bio-Nanohybrids for Functional Stabilisation of Influenza Vaccines (pages 5186–5191)

      Bernd Wicklein, M. Ángeles Martín del Burgo, María Yuste, Margarita Darder, Carmen Escrig Llavata, Pilar Aranda, Juan Ortin, Gustavo del Real and Eduardo Ruiz-Hitzky

      Article first published online: 4 SEP 2012 | DOI: 10.1002/ejic.201200579

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      Clay-lipid bio-nanohybrids were evaluated as carriers of viral antigens in the development of thermally stable and efficacious vaccines against influenza A. The biomimetic lipid interfaces on sepiolite and an Mg/Al-type layered double hydroxide afford improved immunogenicity compared with standard aluminium adjuvants and modulate support-antigen interactions to ensure thermal stability of the immobilised virions.

    4. Cellulose Gel Membranes

      Mineralization of Calcium Carbonates in Cellulose Gel Membranes (pages 5192–5198)

      Marcus W. Rauch, Martina Dressler, Hanne Scheel, Daniel Van Opdenbosch and Cordt Zollfrank

      Article first published online: 23 AUG 2012 | DOI: 10.1002/ejic.201200575

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      Calcite/cellulose hybrid composites were fabricated by a diffusion-based method. The observed crystal morphology can be explained according to mesocrystal theory by which the cellulose matrix acts as a structure-directing agent. The rigid hybrid membranes manufactured from polysaccharides can act as an advanced substrate for bioinspired mineralization of novel composite materials.

    5. Ag-Loaded Titania Nanostructures

      Evaluation of the Antibacterial Activity of Ag-Loaded TiO2 Nanotubes (pages 5199–5206)

      Agata Roguska, Anna Belcarz, Tomasz Piersiak, Marcin Pisarek, Grażyna Ginalska and Małgorzata Lewandowska

      Article first published online: 29 AUG 2012 | DOI: 10.1002/ejic.201200508

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      The evaluation of the antimicrobial activity of Ti, TiO2 nanotubes, and Ag-loaded TiO2 nanotubes against four different bacterial strains prevalent in orthopedic infections revealed that the nanotube-based surfaces prevent the adhesion and biofilm formation of S. epidermidis to a significant degree in comparison with Ti. The antiadhesive properties result from the presence of TiO2 rather than Ag.

    6. Sol-Gel Processing

      Porous Silica-Based Mixed Oxides with Basic Organic Sites (pages 5207–5215)

      Jasmin Geserick, Sarah Meyer, Michael Puchberger, Silvia Pabisch, Herwig Peterlik, Ole Bethge, Emmerich Bertagnolli and Ulrich Schubert

      Article first published online: 4 MAY 2012 | DOI: 10.1002/ejic.201200088

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      Porous, organically modified silica-based mixed oxides were prepared by sol-gel processing of organotrialkoxysilanes with bridging amono groups and metal chlorides. Materials with ordered porosity and uniform mesopores were obtained with metal proportions up to about 20 %.

    7. Biohybrid Materials

      Zein–Fibrous Clays Biohybrid Materials (pages 5216–5224)

      Ana C. S. Alcântara, Margarita Darder, Pilar Aranda and Eduardo Ruiz-Hitzky

      Article first published online: 3 SEP 2012 | DOI: 10.1002/ejic.201200582

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      The assembly of the hydrophobic corn protein zein with fibrous clay minerals (sepiolite and palygorskite) affords new biohybrids with reduced hydrophilic character, which are useful as bioorganoclays to improve the mechanical and barrier properties in polysaccharide-based nanocomposites.

    8. Functionalized Layered Hybrids

      Functional Hybrid Materials Based on Layered Simple Hydroxide Hosts and Dicarboxylate Schiff Base Metal Complex Guests (pages 5225–5238)

      Séraphin Eyele-Mezui, Emilie Delahaye, Guillaume Rogez and Pierre Rabu

      Article first published online: 7 SEP 2012 | DOI: 10.1002/ejic.201200695

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      New hybrid layered simple hydroxides have been obtained by the functionalization of cobalt and copper hydroxides by carboxysalen-type complexes.

    9. Sensitized Solar Cells

      Synthesis of Various Sized CuInS2 Quantum Dots and Their Photovoltaic Properties as Sensitizers for TiO2 Photoanodes (pages 5239–5244)

      Zhuoyin Peng, Yueli Liu, Wei Shu, Keqiang Chen and Wen Chen

      Article first published online: 7 SEP 2012 | DOI: 10.1002/ejic.201200495

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      Various sized CuInS2 quantum dots (QDs) as sensitizers have been uniformly attached to the surface of TiO2 nanoparticle films capped with 3-mercaptopropionic acid (3-MPA). TiO2 solar cells sensitized by 3.5 nm CuInS2 quantum dots gave the best photovoltaic power conversion efficiency of 0.72 % under AM 1.5 illumination.

    10. Magnetic Ionogels

      Magnetic Ionogels (MagIGs) Based on Iron Oxide Nanoparticles, Poly(N-isopropylacrylamide), and the Ionic Liquid Trihexyl(tetradecyl)phosphonium Dicyanamide (pages 5245–5251)

      Bartosz Ziółkowski, Katrin Bleek, Brendan Twamley, Kevin J. Fraser, Robert Byrne, Dermot Diamond and Andreas Taubert

      Article first published online: 29 AUG 2012 | DOI: 10.1002/ejic.201200597

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      Magnetic ionogels (MagIGs) were prepared from organosilane-coated iron oxide nanoparticles, N-isopropylacrylamide(NIPAM), and the ionic liquid trihexyl(tetradecyl)phosphonium dicyanamide. The ionogels respond to external permanent magnets and are therefore prototypes of a new soft magnetic actuator.

    11. Layered Double Hydroxides

      Inorganic–Organic Hybrid Materials Based on Amino Acid Modified Hydrotalcites Used as UV-Absorber Fillers for Polybutylene Succinate (pages 5252–5258)

      Christian Coelho, Thomas Stimpfling, Fabrice Leroux and Vincent Verney

      Article first published online: 12 SEP 2012 | DOI: 10.1002/ejic.201200525

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      Polybutylene succinate functionalized nanocomposites with amino acid tyrosine- and tryptophan-hybrid-interleaved layered double hydroxide materials exhibited interesting anti-UV properties and rheological properties. Embedding amino acid into the layered double hydroxide container preserved the UV shielding property of the pristine organic molecule.

    12. Metal–Organic Frameworks

      CoII/ZnII–(L-Tyrosine) Magnetic Metal–Organic Frameworks (pages 5259–5268)

      Bo Zhou, Nuno J. O. Silva, Fa-Nian Shi, Fernando Palacio, Luís Mafra and João Rocha

      Article first published online: 13 JUL 2012 | DOI: 10.1002/ejic.201200169

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      The crystal structure of chiral isomorphous metal–organic frameworks, [M(L-tyrosine)]n, (M = Co, Zn, Co/Zn) features tetrahedral and octahedral metal sites, resulting in two slightly different edge-sharing metal dimers, with L-tyrosine linking the metal atoms in pillars and forming a dense framework. In the dimers, a ferromagnetic exchange interaction couples the Co2+ ions.

    13. Organic–Inorganic Hybrids

      Electrophoretic Preparation of an Organic–Inorganic Hybrid of Layered Metal Hydroxide and Hydrogel for a Potential Drug-Delivery System (pages 5269–5275)

      Gyeong-Hyeon Gwak, Seung-Min Paek and Jae-Min Oh

      Article first published online: 12 SEP 2012 | DOI: 10.1002/ejic.201200583

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      An organic–inorganic hybrid material, agarose–hydrozincite (ZC), was prepared by an electrophoretic method. The thus prepared hybrid material showed homogeneous dispersion of ZC nanoparticles in the polymer matrix and exhibited a sustained release pattern for loaded anionic phenolic acid molecules such as ferulic acid.

    14. Corrosion Inhibition

      An Fe(CO)5-Thermolysis-Based Process for the Preparation of Polymer@Iron Composite Powders with High Corrosion Resistance (pages 5276–5281)

      Guy Nesher, Gad Marom and David Avnir

      Article first published online: 6 JUN 2012 | DOI: 10.1002/ejic.201200086

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      A corrosion-proof polymer@iron composite was obtained by thermolysis of Fe(CO)5. This work adds to the diversity of applications demonstrated for the new field of entrapment of polymers within metal matrices.

    15. Hybrid Nanomaterials

      A Photoresponsive Hybrid Nanomaterial Based on Graphene and Polyhedral Oligomeric Silsesquioxanes (pages 5282–5287)

      Luca Valentini, Marta Cardinali, Josè M. Kenny, Mirko Prato and Orietta Monticelli

      Article first published online: 6 JUL 2012 | DOI: 10.1002/ejic.201200260

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      A grafting reaction has been performed under mild conditions between an amino-functionalized polyhedral oligomeric silsesquioxane (POSS) and graphene oxide (GO) functional groups. The combination of POSS molecules with GO sheets produces a photoresponsive hybrid nanomaterial.

    16. Ionosilicas

      Guanidinium vs. Ammonium Surfactants in Soft-Templating Approaches: Nanostructured Silica and Zwitterionic i-Silica from Complementary Precursor–Surfactant Ion Pairs (pages 5288–5298)

      Samir El Hankari and Peter Hesemann

      Article first published online: 26 JUL 2012 | DOI: 10.1002/ejic.201200419

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      We compared ammonium and guanidinium surfactants as structure-directing agents in soft templating syntheses of nanostructured and hybrid-silica-based ionic substructures (i-silicas). Nanostructured i-silicas exist due to specific carboxylate precursor/guanidinium surfactant interactions. Results suggest that nanostructured silica hybrid materials can be obtained from complementary precursor–surfactant pairs.

    17. Hybrid Materials

      Dynamic Constitutional Hybrid Materials – Confined Guanosine Ribbons within Mesoporous Silica (pages 5299–5304)

      Simona Mihai, Justine Dauthier, Yann Le Duc, Abdelsalam El Mansouri, Ahmad Mehdi and Mihail Barboiu

      Article first published online: 13 SEP 2012 | DOI: 10.1002/ejic.201200754

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      Dynamic convergence” between directional supramolecular self-assembled guanosine ribbons (G-ribbons) and inorganic silica mesoporous scaffolds leads to self-organized hybrid materials in which G-ribbons are strongly stabilized.

    18. Ionic Nanoparticle Networks

      Ionic Nanoparticle Networks as Solid State Catalysts (pages 5305–5311)

      Jérôme Roeser, Martin Kronstein, Marco Litschauer, Arne Thomas and Marie-Alexandra Neouze

      Article first published online: 15 AUG 2012 | DOI: 10.1002/ejic.201200581

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      The catalytic activity of imidazolium-based nanoparticle networks was demonstrated for CO2 cycloaddition reactions to various epoxides. The hybrid solid-state material can be easily separated and reused after the reaction. Conversion or selectivity up to 100 % could be obtained under mild conditions and in a short reaction time.

    19. Nanostructuring

      The Influence of Arylene and Alkylene Units on the Structuring of Urea-Based Bridged Silsesquioxanes (pages 5312–5322)

      Benoît P. Pichon, Sylvana Scampini, Catherine Bied, Joël J. E. Moreau and Michel Wong Chi Man

      Article first published online: 4 OCT 2012 | DOI: 10.1002/ejic.201200616

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      The organic units (arylene, urea and trialkoxysilyl groups; hydrocarbon side chains) of organosilanes are shown to self-direct the nanostructuring of bridged silsesquioxanes.

    20. Magnetic Nanoparticles

      Cyclodextrin Anchoring on Magnetic Fe3O4 Nanoparticles Modified with Phosphonic Linkers (pages 5323–5331)

      Cristina Tudisco, Valentina Oliveri, Maria Cantarella, Graziella Vecchio and Guglielmo G. Condorelli

      Article first published online: 7 SEP 2012 | DOI: 10.1002/ejic.201200510

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      The anchoring process of bifunctional phosphonic linkers on magnetic iron nanoparticles (MNPs) was investigated. β-Cyclodextrin (β-CD) was then covalently bonded to MNPs functionalized with (3-aminopropyl)phosphonic acid (APPA). The hybrid MNP–APPA–β-CD system is able to load and release diclofenac sodium salt, an anti-inflammatory drug used as a model.

    21. Layered Double Hydroxides

      Formation of Single-Layered Double-Hydroxide Platelets in Poly(vinylpyrrolidone) and Alginate Medium: Conductive, Capacitive, and Dielectric Properties of the Hybrid Films (pages 5332–5342)

      Fabrice Leroux, Karine Chabrol, Sandrine Thérias, Jean-Luc Gardette and André de Roy

      Article first published online: 26 SEP 2012 | DOI: 10.1002/ejic.201200509

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      The formation of single-layered double-hydroxide hybrid platelets generated in a one-pot synthesis through the combined effect of two polyelectrolytes results in a polyvinylpyrrolidone film that presents enhanced ion conductivity associated with an Arrhenius-type dependence with a disruptive phenomenon. It was scrutinized by a dielectric study.

    22. Biocompatibility of Nanoparticles

      Nano–Bio Interaction between Graphite Oxide Nanoparticles and Human Blood Components (pages 5343–5349)

      Hyoung-Mi Kim, Kyoung-Min Kim, Kyunghong Lee, Yoon Suk Kim and Jae-Min Oh

      Article first published online: 29 AUG 2012 | DOI: 10.1002/ejic.201200587

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      The interaction between graphite oxide (GO) nanoparticles and blood components are demonstrated. The GO nanoparticles are biocompatible, that is, they behave inert with blood cells and plasma proteins.

    23. Photocatalytic Titania Fibers

      Photocatalytic TiO2 Macroscopic Fibers Obtained Through Integrative Chemistry (pages 5350–5359)

      Natacha Kinadjian, Mickael Le Bechec, Thierry Pigot, Fabien Dufour, Olivier Durupthy, Ahmed Bentaleb, Eric Prouzet, Sylvie Lacombe and Rénal Backov

      Article first published online: 1 OCT 2012 | DOI: 10.1002/ejic.201200731

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      Titania fibers were prepared with a hierarchical structure to identify the multiscale structural parameters that contribute to enhance the photocatalytic degradation of volatile organic compounds (VOCs), especially their conversion into CO2 (mineralization).

    24. PEDOT Electrochromism

      Hybrid PEDOT–Metal Nanoparticles – New Substitutes for PEDOT:PSS in Electrochromic Layers – Towards Improved Performance (pages 5360–5370)

      Muhammad Mumtaz, Blanche Ouvrard, Laurent Maillaud, Christine Labrugere, Eric Cloutet, Henri Cramail and Marie-Helene Delville

      Article first published online: 12 OCT 2012 | DOI: 10.1002/ejic.201200856

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      Hybrid nanocomposites of poly(3,4-ethylenedioxythiophene) (PEDOT) and silver or gold with particle size down to 60 nm were prepared by a one-pot oxidative aqueous dispersion polymerization and used to replace PEDOT:PSS as a more conducting anchoring layer. This leads to improved electrochromic properties in terms of contrast ratio, coloration efficiency, and switching time response.

    25. Post-Synthesis Grafting

      Post-Synthesis Grafting of Fluoropropyl Groups on SBA-15 Type Ordered Mesoporous Silica (pages 5371–5379)

      Taissire Benamor, Julien Miesh, Gaëtan Montégut, Habiba Nouali, Claire Marichal and Bénédicte Lebeau

      Article first published online: 16 OCT 2012 | DOI: 10.1002/ejic.201201001

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      To prepare more hydrophobic SBA-15 materials, (3,3,3-trifluoropropyl)dimethylchlorosilane was used as a grafting agent. The initial content and the accessibility of silanol groups in the material were found to be the key factors for efficient grafting.

    26. Polyelectrolyte Multilayers

      The Mechanical Performance of a Biomimetic Nanointerface Made of Multilayered Polyelectrolytes (pages 5380–5389)

      Sacha Cavelier, Christopher J. Barrett and Francois Barthelat

      Article first published online: 27 SEP 2012 | DOI: 10.1002/ejic.201200626

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      Polyelectrolyte multilayers (PEMs) possess attractive mechanical properties such as high deformability and strength, which make them suitable for the fabrication of new organic–inorganic bioinspired hybrid materials. In this work we have measured, for the first time, the shear strength and mode I fracture toughness of PEMs deposited between silicon substrates.

    27. Photoluminescence

      Boosting the Emission Quantum Yield of Urea Cross-Linked Tripodal Poly(oxypropylene)/Siloxane Hybrids Through the Variation of Catalyst Concentration (pages 5390–5395)

      Vânia T. Freitas, Patrícia P. Lima, Verónica de Zea Bermudez, Rute A. S. Ferreira and Luís D. Carlos

      Article first published online: 11 OCT 2012 | DOI: 10.1002/ejic.201200823

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      Tripodal siloxane-based hybrids were processed using a wide concentration range of hydrochloric acid catalyst (1.0 × 10–3 ≤ [HCl] ≤ 2.0 M). The hybrids are room-temperature blue emitters and display a maximum quantum yield of 0.13 ± 0.01 for 0.01 ≤ [HCl] ≤ 0.1 M, demonstrating the role of catalyst concentration in photoluminescence enhancement.

    28. Layered Double Hydroxides

      Phosphate-Based Organic Molecules Interleaved with Layered Double Hydroxide: Unraveling the Roles of Host Cations and the Guest-Inhibiting Effect in Aluminum Corrosion Protection (pages 5396–5404)

      Thomas Stimpfling, Fabrice Leroux and Horst Hintze-Bruening

      Article first published online: 26 SEP 2012 | DOI: 10.1002/ejic.201200504

      Thumbnail image of graphical abstract

      The synergistic effect of an organic corrosion-inhibitor agent combined with an appropriate chemical composition of an inorganic layered double hydroxide (LDH) host structure prevents the corrosion of aluminum alloy 2024. The dissolution of the LDH framework during the anodic corrosion process provokes the release of both cation and anion corrosion-inhibitor species.

    29. Biomimetic Synthetic Templating

      Programmed Biologically Inspired Synthetic Templating of Multifunctional Nanoarchitectures for Small-Scale Reactions (pages 5405–5410)

      Jonathan E. Didier, Chad M. Schafer and Philip R. LeDuc

      Article first published online: 19 JUL 2012 | DOI: 10.1002/ejic.201200382

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      A novel method for increasing reaction rates is presented. We demonstrate that we can accelerate a biological reaction by using a synthetic templating technique with β-galactosidase as a model system and achieve a nearly 30-fold increase in the maximum rate of reaction.

    30. Hybrid Materials

      Hybrid Materials Based on Smectite Clays and Nutraceutical Anthocyanins from the Açaí Fruit (pages 5411–5420)

      Ângela A. Teixeira-Neto, Celly M. S. Izumi, Marcia L. A. Temperini, Ana Maria da C. Ferreira and Vera R. L. Constantino

      Article first published online: 16 OCT 2012 | DOI: 10.1002/ejic.201200702

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      New materials were prepared by combining clay minerals and natural purple dyes extracted from a native Amazonian palm fruit known as açaí. Intercalation into clay minerals improves the stability of the natural dyes against heat and preserves their properties as radical scavengers.

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