ChemPlusChem

Cover image for Vol. 78 Issue 7

July 2013

Volume 78, Issue 7

Pages 605–745

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Cover Profile
    4. Graphical Abstract
    5. Masthead
    6. News
    7. Communications
    8. Full Papers
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      Cover Picture: Extraction of Noble and Rare-Earth Metals from Aqueous Solutions by DNA Cross-Linked Hydrogels (ChemPlusChem 7/2013) (page 605)

      Yuko Maeda, Dr. Anatoly Zinchenko, Dr. Larisa I. Lopatina, Prof. Dr. Vladimir G. Sergeyev and Prof. Dr. Shizuaki Murata

      Article first published online: 8 JUL 2013 | DOI: 10.1002/cplu.201390026

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      The cover picture shows extraction of several valuable elements of the periodic table by DNA hydrogel, which is cut out in the form of a blossom from a Japanese cherry tree and stained with a pink DNA dye, ethidium bromide. In their Communication on page 619 ff., A. Zinchenko and co-workers outline the application of DNA cross-linked hydrogel for efficient extraction of noble and rare-earth metals. They demonstrate that placement of DNA hydrogel into a solution containing AuIII, PdII, or YbIII for several hours yields, in a single step, up to 70% of the metals from the aqueous phase in the hydrogel matrix.

  2. Cover Profile

    1. Top of page
    2. Cover Picture
    3. Cover Profile
    4. Graphical Abstract
    5. Masthead
    6. News
    7. Communications
    8. Full Papers
    1. You have free access to this content
      Extraction of Noble and Rare-Earth Metals from Aqueous Solutions by DNA Cross-Linked Hydrogels (page 606)

      Yuko Maeda, Dr. Anatoly Zinchenko, Dr. Larisa I. Lopatina, Prof. Dr. Vladimir G. Sergeyev and Prof. Dr. Shizuaki Murata

      Article first published online: 14 MAY 2013 | DOI: 10.1002/cplu.201300151

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      “... systems containing metal ions inside a polymeric matrix are very pomising because they allow various reactions to be performed directly inside the hydrogel.” This and more about the story behind the cover in the Cover Profile and about the research itself on page 619 ff.

  3. Graphical Abstract

    1. Top of page
    2. Cover Picture
    3. Cover Profile
    4. Graphical Abstract
    5. Masthead
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    1. Graphical Abstract: ChemPlusChem 7/2013 (pages 607–614)

      Article first published online: 8 JUL 2013 | DOI: 10.1002/cplu.201390027

  4. Masthead

    1. Top of page
    2. Cover Picture
    3. Cover Profile
    4. Graphical Abstract
    5. Masthead
    6. News
    7. Communications
    8. Full Papers
    1. Masthead: ChemPlusChem 7/2013 (page 615)

      Article first published online: 8 JUL 2013 | DOI: 10.1002/cplu.201390028

  5. News

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

    1. Top of page
    2. Cover Picture
    3. Cover Profile
    4. Graphical Abstract
    5. Masthead
    6. News
    7. Communications
    8. Full Papers
    1. Extraction of Noble and Rare-Earth Metals from Aqueous Solutions by DNA Cross-Linked Hydrogels (pages 619–622)

      Yuko Maeda, Dr. Anatoly Zinchenko, Dr. Larisa I. Lopatina, Prof. Dr. Vladimir G. Sergeyev and Prof. Dr. Shizuaki Murata

      Article first published online: 22 APR 2013 | DOI: 10.1002/cplu.201300047

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      Treasure trove: A method for the extraction of noble and rare-earth metals by a DNA cross-linked hydrogel, based on high DNA affinity to these elements, is described (see picture). The hydrogel is promising in applications for metal accumulation and recycling.

    2. Synthesis, Self-Assembly, and Electrocatalysis of Polyallylamine-Functionalized Platinum Nanocubes (pages 623–627)

      Gengtao Fu, Ruopeng Zhao, Linfei Ding, Lin Tao, Prof. Dr. Jun Lin, Prof. Dr. Yu Chen, Prof. Dr. Yawen Tang, Prof. Dr. Yiming Zhou and Prof. Dr. Tianhong Lu

      Article first published online: 22 MAY 2013 | DOI: 10.1002/cplu.201300120

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      The title composite was prepared and self-assembled on carbon nanotubes (CNTs). Even after cleaning with UV/Ozone and electrochemical methods, the residual polyallylamine strongly influences the electronic structure of Pt. The resultant Pt-NC/CNT nanohybrid shows superior electrochemical activity and stability towards the oxygen reduction reaction in H2SO4 solutions compared with commercial Pt/C catalyst.

    3. A Selective “Turn-On” Fluorescent Probe for Recognition of Mercury(II) Ions in Aqueous Solution Based on a Desulfurization Reaction (pages 628–631)

      Dr. Yuanyuan Yan, Yanhua Zhang and Prof. Dr. Hui Xu

      Article first published online: 5 JUN 2013 | DOI: 10.1002/cplu.201300150

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      Turn me on: A new “turn-on” 1,8-naphthalimide-type chemosensor 1 has been prepared and exhibited high selectivity and sensitivity towards Hg2+ ions over other heavy- and transition-metal ions in aqueous solution, accompanied by the transformation of a weakly fluorescent thiourea moiety (colorless) to a highly fluorescent urea one (green) with an increase in fluorescence intensity.

    4. An Unexpected Pathway for Ligand Substitution in an Aryl Halide Complex of Palladium (pages 632–635)

      Zohrab Ahmadi, Prof. Allen G. Oliver and Assoc. Prof. J. Scott McIndoe

      Article first published online: 11 JUN 2013 | DOI: 10.1002/cplu.201300131

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      A supposed spectator ligand plays a crucial role in a seemingly simple ligand substitution reaction on palladium. Continuous monitoring by ESI-MS reveals all the details of an initial fast displacement of iodide by an incoming phosphine ligand, and of the recoordination of iodide that prompts the displacement of the bidentate ligand actually being substituted. An apparent double substitution and subsequent isomerization can be readily explained by two fast and one slow ligand substitution reactions (see figure).

    5. Electrospun Spinel LiNi0.5Mn1.5O4 Hierarchical Nanofibers as 5 V Cathode Materials for Lithium-Ion Batteries (pages 636–641)

      Dr. Jun Liu, Wei Liu, Shaomin Ji, Prof. Yichun Zhou, Prof. Peter Hodgson and Dr. Yuncang Li

      Article first published online: 13 JUN 2013 | DOI: 10.1002/cplu.201300180

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      In a spin: LiNi0.5Mn1.5O4 hierarchical nanofibers with diameters of 200–500 nm and lengths of up to several tens of micrometers were synthesized using low-cost starting materials by electrospinning combined with annealing. These nanofibers exhibit a favorable electrochemical performance. At a 0.5 C, they show an initial discharge capacity of 133 mA h g−1 with a capacity retention over 94 % after 30 cycles (see figure).

    6. Absolute Configuration and Antimalarial Activity of erythro-Mefloquine Enantiomers (pages 642–646)

      Dr. Alexandra Dassonville-Klimpt, Dr. Christine Cézard, Dr. Catherine Mullié, Dr. Patrice Agnamey, Dr. Alexia Jonet, Sophie Da Nascimento, Dr. Mathieu Marchivie, Prof. Dr. Jean Guillon and Prof. Dr. Pascal Sonnet

      Article first published online: 21 JUN 2013 | DOI: 10.1002/cplu.201300074

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      Mefloquine (MQ), an antimalarial drug, is used as a racemate of (−)- and (+)-enantiomers, which display biological differences. The question concerning their exact configuration remains a matter of debate. The absolute configuration of the two MQ enantiomers as well as their biological activity has been established, thus confirming the importance of the stereochemistry in the design of MQ analogues that have fewer adverse side effects (see figure).

  7. Full Papers

    1. Top of page
    2. Cover Picture
    3. Cover Profile
    4. Graphical Abstract
    5. Masthead
    6. News
    7. Communications
    8. Full Papers
    1. One-pot Synthesis of Mesoporous TiO2 from Self-Assembled Sol Particles and Its Application as Mesoscopic Photoanodes of Dye-Sensitized Solar Cells (pages 647–655)

      Dr. Min Zhang, Keyou Yan, Dr. Wei Han and Prof. Dr. Shihe Yang

      Article first published online: 9 MAY 2013 | DOI: 10.1002/cplu.201300133

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      Highly crystalline mesoporous TiO2 was synthesized by a one-pot strategy that combines advantages of the Stöber, surfactant-templated, and hydrothermal methods (see figure; ACAC=acetyl acetone, IPA=isopropanol, TIP=titanium isopropoxide). The resulting photoanodes showed much higher efficiency because of extended electron lifetime related to the mesoporous structure confinement effect and accelerated electron transport.

    2. Versatile Fluorescent Conjugated Polyelectrolyte-Capped Mesoporous Silica Nanoparticles for Controlled Drug Delivery and Imaging (pages 656–662)

      Dr. Fang Pu, Xia Liu, Xinjian Yang, Zhen Liu, Prof. Dr. Jinsong Ren, Prof. Dr. Shu Wang and Prof. Dr. Xiaogang Qu

      Article first published online: 13 MAY 2013 | DOI: 10.1002/cplu.201300135

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      Luminescent cap: The properties of a fluorescent conjugated polyelectrolyte and mesoporous silica nanoparticles have been combined to prepare a pH-controlled drug delivery and cellular imaging system by using a simple and general method (see scheme). The fluorescent conjugated polyelectrolyte was used as both the capping agent and the imaging probe with low cytotoxicity. It is a promising candidate for simultaneous diagnostics and therapeutics.

    3. 9-Fluorenone-2-Carboxylic Acid as a Scaffold for Tubulin Interacting Compounds (pages 663–669)

      Francesco Calogero, Stella Borrelli, Dr. Gaetano Speciale, Dr. Michael S. Christodoulou, Dr. Daniele Cartelli, Dr. Dario Ballinari, Dr. Francesco Sola, Dr. Clara Albanese, Dr. Antonella Ciavolella, Prof. Dr. Daniele Passarella, Prof. Dr. Graziella Cappelletti, Dr. Stefano Pieraccini and Prof. Dr. Maurizio Sironi

      Article first published online: 13 MAY 2013 | DOI: 10.1002/cplu.201300036

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      Tubulin as the target: The introduction of a hydrophobic group at position 7 of 9-fluorenone-2-carboxylic acid (see structure) generates new tubulin binders, the design of which is suggested by modeling studies. The antiproliferative activity on two different cell lines, fluorescent microscopy, flow cytometry, and sedimentation assay tests confirmed the supposed mechanism.

    4. Facile Synthesis of Phosphate-Functionalized MWCNT–TiO2 Nanocomposites as Efficient Photocatalysts and Insights into the Roles of Nanostructured Carbon (pages 670–676)

      Zhijun Li, Lumei He, Prof. Liqiang Jing, Jingsheng Lin and Dr. Yunbo Luan

      Article first published online: 17 MAY 2013 | DOI: 10.1002/cplu.201300083

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      Pollutant breakdown: As depicted, the photogenerated electrons of TiO2 transfer to the multiwalled carbon nanotube (MWCNT) and are captured by adsorbed O2. Phosphate functionalization of MWCNTs promotes O2 adsorption to improve photogenerated charge separation of the resulting MWCNT–TiO2 composite.

    5. Synthesis of Cell-Penetrating S-Galactosyl–Oligoarginine Peptides as Inducers of Recombinant Protein Expression under the Control of lac Operator/Repressor Systems (pages 677–683)

      Yukina Mizuta, Prof. Akinori Takasu and Masahiro Higuchi

      Article first published online: 23 MAY 2013 | DOI: 10.1002/cplu.201300130

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      Just passing through: S-galactosyl–oligo(Arg) conjugates (see scheme) as new inducers for protein biosynthesis in bacteria have been synthesized. In vivo expression of green fluorescence protein (GFP) was induced by S-Gal–(Arg)n at the T5 promoter in E. coli. The level of GFP expression was directly related to the number of arginine moieties in each peptide, which are proposed to be responsible for how well each peptide passes through the E. coli membrane.

    6. Organic–Inorganic Hybrid Mesoporous Materials as Regenerable Sensing Systems for the Recognition of Nitroaromatic Explosives (pages 684–694)

      Dr. Krishanu Sarkar, Yolanda Salinas, Dr. Inmaculada Campos, Prof. Ramón Martínez-Máñez, Dr. María D. Marcos, Dr. Félix Sancenón and Prof. Pedro Amorós

      Article first published online: 31 MAY 2013 | DOI: 10.1002/cplu.201300140

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      All in the family: A family of mesoporous materials functionalised with fluorophores (pyrene, dansyl and fluorescein) have been prepared, characterised and used for the fluorogenic recognition of nitroaromatic explosives (see red hexagons in figure). The emission of the pyrene and dansyl functionalised materials was quenched upon the addition of picric acid or 2,4,6-trinitrophenylmethylnitramine, hence easy detection was possible.

    7. Sperm-Activating Odorous Substances in Human Follicular Fluid and Vaginal Secretion: Identification by Gas Chromatography–Olfactometry and Ca2+ Imaging (pages 695–702)

      Constanze Hartmann, Dr. Annika Triller, Prof. Dr. Marc Spehr, Prof. Dr. Ralf Dittrich, Prof. Dr. Hanns Hatt and Prof. Dr. Andrea Buettner

      Article first published online: 3 JUN 2013 | DOI: 10.1002/cplu.201300008

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      Find the egg: Before contact, egg and sperm communicate by chemotaxis. Chemoreceptors expressed on sperm seem to play a key role in this communication (see figure). Several odor-active ligands for such receptors have been reported in the past, but were exclusively of synthetic origin. Herein, the first endogenous odor-active ligands are identified in bodily fluids of the female reproductive tract.

    8. Aerobic Oxidation of 9H-Fluorenes to 9-Fluorenones using Mono-/Multilayer Graphene-Supported Alkaline Catalyst (pages 703–711)

      Xin Zhang, Xuan Ji, Ruifei Su, Prof. Brandon L. Weeks, Prof. Zhao Zhang and Prof. Songlu Deng

      Article first published online: 28 MAY 2013 | DOI: 10.1002/cplu.201300123

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      9-Fluorenone derivatives (16 examples) have been synthesized in high yield and with high purity by aerobic oxidation of 9H-fluorenes at room temperature in the presence of a graphene-supported KOH composite catalyst in N,N-dimethylformamide. The new protocol is cost-effective and has potential for application in industrial processes.

    9. In Vivo Magnetic Resonance Imaging Detection of Paramagnetic Liposomes Loaded with Amphiphilic Gadolinium(III) Complexes: Impact of Molecular Structure on Relaxivity and Excretion Efficiency (pages 712–722)

      Dr. Evelina Cittadino, Prof. Mauro Botta, Dr. Lorenzo Tei, Dr. Filip Kielar, Dr. Rachele Stefania, Enrico Chiavazza, Prof. Silvio Aime and Prof. Enzo Terreno

      Article first published online: 3 JUN 2013 | DOI: 10.1002/cplu.201300096

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      Creating an image: The in vivo performance of liposomes loaded with different amphiphilic Gd-based magnetic resonance imaging agents is compared in a tumour model on mice. The tetracarboxylic complex GdDOTA(GAC12)2 (see figure), which combines a fast rate of water exchange and a restricted local mobility, shows the highest sensitivity detection and more favourable pharmacokinetic properties.

    10. Intrinsic Peroxidase Catalytic Activity of Fe7S8 Nanowires Templated from [Fe16S20]/Diethylenetriamine Hybrid Nanowires (pages 723–727)

      Dr. Wei-Tang Yao, Hai-Zhou Zhu, Wei-Gu Li, Hong-Bin Yao, Prof. Dr. Yu-Cheng Wu and Prof. Dr. Shu-Hong Yu

      Article first published online: 6 JUN 2013 | DOI: 10.1002/cplu.201300075

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      Highly perceptive: Well-defined Fe7S8 nanowires have been synthesized by thermal deposition of Fe16S20/DETA hybrid nanowires (DETA=diethylenetriamine) and can be used as enzyme mimics with potential applications for the development of amperometric transducers and biocatalysts (see picture).

    11. Interest of the Precatalyst Design for Olefin Metathesis Operating in a Discontinuous Nanofiltration Membrane Reactor (pages 728–736)

      Ghassan Nasser, Dr. Thierry Renouard, Saurabh Shahane, Dr. Cédric Fischmeister, Dr. Christian Bruneau and Prof. Murielle Rabiller-Baudry

      Article first published online: 11 JUN 2013 | DOI: 10.1002/cplu.201300112

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      Precatalyst design: A series of modified Hoveyda-type olefin metathesis precatalysts have been synthesized and submitted to an organic solvent nanofiltration process and compared to the commercially available Hoveyda–Grubbs precatalyst (see figure). All complexes display very high retention. Attempts to reuse the precatalysts were found to be dependent upon the extent of activation of the precatalyst in the first cycle.

    12. Heavy Atom Effect Driven Organic Phosphors and Their Luminescent Lanthanide Metal–Organic Frameworks (pages 737–745)

      Ayyakkalai Balamurugan, Arvind Kumar Gupta, Ramamoorthy Boomishankar, Mundlapudi Lakshmipathi Reddy and Manickam Jayakannan

      Article first published online: 11 JUN 2013 | DOI: 10.1002/cplu.201300121

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      Heavyweight glowing: The heavy atom effect is employed to engineer the excited-state energy levels in luminescent lanthanide metal–organic frameworks (MOFs) by coupling two independent energy-transfer photophysical process: enhancing the electronic population in the excited triplet state through intersystem crossing and ligand-to-metal energy transfer (LMET; see picture).

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