ChemPlusChem

Cover image for Vol. 77 Issue 1

January 2012

Volume 77, Issue 1

Pages 1–82

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Editorial
    5. Graphical Abstract
    6. News
    7. Communications
    8. Full Papers
    9. Masthead
    1. You have free access to this content
      Cover Picture: Redox Chemistry of Third Phases Formed in the Cerium/Nitric Acid/Malonamide-n-Dodecane Solvent Extraction System (ChemPlusChem 1/2012) (page 1)

      Dr. Ross J. Ellis and Dr. Mark R. Antonio

      Article first published online: 17 JAN 2012 | DOI: 10.1002/cplu.201290000

      Thumbnail image of graphical abstract

      The cover picture shows that the renowned cerium(III/IV) redox couple is the keystone that bridges the fields of separation science and electrochemistry. In their Full Paper on pp. 41 ff. Ellis and Antonio show that measurements of voltammetric behaviors in organic phases obtained by solvent extraction afford insights into third phase phenomena, including reversible electrochromism, wherein the formation of yellow- and red-colored third phases are correlated with Ce valence–CeIII obtains in the yellow third phase prepared from Ce(NO3)3 and CeIV in the red phase prepared from Ce(NO3)4. These Ce valences are interconvertible by the polarization of an electrode at +0.9 and +1.4 V vs. Ag/AgCl, respectively.

  2. Masthead

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    4. Editorial
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    8. Full Papers
    9. Masthead
    1. Masthead: ChemPlusChem ChemPlusChem 1/2012 (page 2)

      Article first published online: 17 JAN 2012 | DOI: 10.1002/cplu.201290003

  3. Editorial

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    4. Editorial
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      ChemPlusChem—Close Collaborations Centering on Chemistry (pages 3–12)

      Dr. Neville Compton and Dr. Marisa Spiniello

      Article first published online: 17 JAN 2012 | DOI: 10.1002/cplu.201100057

  4. Graphical Abstract

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    4. Editorial
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    1. Graphical Abstract: ChemPlusChem 1/2012 (pages 13–15)

      Article first published online: 17 JAN 2012 | DOI: 10.1002/cplu.201290001

  5. News

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    1. Spotlights on our sister journals: ChemPlusChem 1/2012 (pages 16–18)

      Article first published online: 17 JAN 2012 | DOI: 10.1002/cplu.201290002

  6. Communications

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    1. Single-Stranded DNA-Mediated Immobilization of Graphene on a Gold Electrode for Sensitive and Selective Determination of Dopamine (pages 19–22)

      Lei Wang, Xiaoyun Qin, Dr. Sen Liu, Yonglan Luo, Abdullah M. Asiri, Abdulrahman O. Al-Youbi and Prof. Xuping Sun

      Article first published online: 16 DEC 2011 | DOI: 10.1002/cplu.201100009

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      Chemically modified electrodes: The fast and effective immobilization of graphene on a Au electrode has been demonstrated by exploiting Au–S interactions between Au and a thiolated single-stranded DNA as well as π–π stacking interactions between graphene and DNA bases (see figure). The resultant modified electrode exhibits high sensitivity and selectivity in dopamine detection with a detection limit of 0.8 nM in the presence of ascorbic acid.

    2. Application of Zeolitic Imidazolate Framework-8 Nanoparticles for the Fluorescence-Enhanced Detection of Nucleic Acids (pages 23–26)

      Dr. Sen Liu, Lei Wang, Jingqi Tian, Yonglan Luo, Guohui Chang, Abdullah M. Asiri, Abdulrahman O. Al-Youbi and Prof. Xuping Sun

      Article first published online: 16 DEC 2011 | DOI: 10.1002/cplu.201100010

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      Stranded on a nanoparticle: For the first time, zeolitic imidazolate framework-8 nanoparticles (ZIFNPs) have been used in an effective fluorescent sensing platform for nucleic acids. The DNA detection is accomplished in two steps: 1) ZIFNPs adsorb and quench the dye-labeled single-stranded DNA probe, and 2) subsequent hybridization of the probe with its target produces double-stranded DNA, which detaches from the ZIFNP. The present system shows a high selectivity down to single-base mismatch (see figure).

    3. Significant Synergistic Effect between Supported Ruthenium and Copper Oxides for Propylene Epoxidation by Oxygen (pages 27–30)

      Wenjing Long, Qingge Zhai, Jieli He, Prof. Dr. Qinghong Zhang, Dr. Weiping Deng and Prof. Dr. Ye Wang

      Article first published online: 4 JAN 2012 | DOI: 10.1002/cplu.201100050

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      The right mix! Significant synergistic effects exist between RuOx and CuOx for the propylene epoxidation by oxygen. While supported CuOx and RuOx alone both catalyzed the formation of acrolein as the main partial oxidation product, the combination of RuOx and CuOx in an appropriate ratio afforded an efficient and stable epoxidation catalyst. The supported nanocomposites with the direct contact interface between CuOx and RuOx were proposed for propylene oxide formation (see figure).

  7. Full Papers

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    1. Platinum(IV)-Mediated Nitrile–Amidoxime Coupling Reactions: Insights into the Mechanism for the Generation of 1,2,4-Oxadiazoles (pages 31–40)

      Dmitrii S. Bolotin, Dr. Nadezhda A. Bokach, Prof. Dr. Matti Haukka and Prof. Dr. Vadim Yu. Kukushkin

      Article first published online: 4 JAN 2012 | DOI: 10.1002/cplu.201100047

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      Step by step: The stepwise nucleophilic addition of amidoximes to nitrile ligands in platinum(IV) complexes leads to coordinated O-imidoylamidoximines. These newly formed species after decoordination undergo cyclization (see scheme) to furnish 1,2,4-oxadiazoles. The cyclization is promoted by strong acceptor substituents R′ and is not affected by a metal center.

    2. Redox Chemistry of Third Phases Formed in the Cerium/Nitric Acid/Malonamide-n-Dodecane Solvent Extraction System (pages 41–47)

      Dr. Ross J. Ellis and Dr. Mark R. Antonio

      Article first published online: 30 DEC 2011 | DOI: 10.1002/cplu.201100022

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      Three phases are a charm: The electroactive nature of Ce and its renowned CeIII/IV couple make it the keystone of this investigation at the intersection of separation science and electrochemistry. The CeIII/IV couple has been probed to disclose its physical and spectroscopic behaviors in organic phases of relevance to solvent extraction, thus affording original insights into third phase phenomena and ion transfer across the aqueous–organic liquid interface in the title system (see figure).

    3. Tuning the Release of Anticancer Drugs from Magnetic Iron Oxide/Mesoporous Silica Core/Shell Nanoparticles (pages 48–55)

      Dr. Nikola Ž. Knežević, Dr. Igor I. Slowing and Dr. Victor S.-Y. Lin

      Article first published online: 16 DEC 2011 | DOI: 10.1002/cplu.201100026

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      A series of core/shell magnetic mesoporous silica nanoparticle (MMSN) materials were prepared. The loading and release of anticancer drugs, 9-aminoacridine (9AA) and camptothecin (CPT), as well as cytotoxic activity of drug loaded materials, is influenced by the presence of phenylethyl functionalization inside the MMSN mesopores (see figure). An externally applied magnetic field accelerates the drug release from the materials.

    4. Highly Water-Dispersible Fe3O4 Single Nanocrystals: Gram-Scale Preparation by a Solution-Phase Route and Application for the Absorption of Cd2+ in Water (pages 56–60)

      Xiao-Hui Guan, Bo-Tian Zheng, Min Lu, Xin Guan, Guang-Sheng Wang and Lin Guo

      Article first published online: 16 DEC 2011 | DOI: 10.1002/cplu.201100023

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      It′s all under control: High-yield production of Fe3O4 (10–15 nm) was realized by using a simple solution-phase method at room temperature. The Fe3O4 nanocrystals were continually synthesized by controlling the pH value of the reaction solution. The SEM, TEM, and XRD studies reveal the particles to be single nanocrystals. New adsorbents of FNBC are better at removing Cd2+ than BC and Fe3O4 nanocrystals.

    5. Versatile Photoactive Materials Based on Zeolite L Doped with Laser Dyes (pages 61–70)

      Leire Gartzia-Rivero, Dr. Jorge Bañuelos-Prieto, Dr. Virginia Martínez-Martínez and Prof. Dr. Iñigo López Arbeloa

      Article first published online: 16 DEC 2011 | DOI: 10.1002/cplu.201100020

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      Keep your antenna up: The incorporation of laser dyes into the channels of zeolite L gives rise to intermolecular energy-transfer processes, which form the basis of white-light-emitting devices and antenna systems. The doped materials were fully characterized by steady-state and time-resolved photophysical techniques. Fluorescence emission bands of these materials cover the entire visible region, and tuning of the emission in the blue, green, and red regions was achieved through energy transfer (see fluorescence images).

    6. Gold Nanospacers Greatly Enhance the Capacitance of Electrochemically Reduced Graphene (pages 71–73)

      Lucia Buglione, Dr. Alessandra Bonanni, Dr. Adriano Ambrosi and Prof. Martin Pumera

      Article first published online: 16 DEC 2011 | DOI: 10.1002/cplu.201100016

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      Capacity management: Gold nanoparticle (AuNP) spacers have been used to increase the capacitance of electrochemically reduced graphene (ER-GO) to values of approximately 174 F g−1. By the careful and systematic optimization of nanospacers loadings, the capacitance can be dramatically enhanced because these spacers prevent the graphene sheets from stacking (see picture: yellow=AuNP, green=purple=ER-GO).

    7. Electrical Bistability and WORM Memory Effects in Donor–Acceptor Polymers Based on Poly(N-vinylcarbazole) (pages 74–81)

      Bin Zhang, Dr. Gang Liu, Prof. Dr. Yu Chen, Cheng Wang, Koon-Gee Neoh, Ting Bai and Prof. Dr. En-Tang Kang

      Article first published online: 16 DEC 2011 | DOI: 10.1002/cplu.201100007

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      Make the switch: Poly(N-vinylcarbazole) derivatives with pendant donor–trap–acceptor structures exhibit electrical effects. The origin of the electrical bistability, which arises from the intramolecular charge transfer, trapping, and conformational relaxation of the electrostatic energy of the Al/polymer/indium tin oxide sandwich structure (see figure), was established by spectroscopic, microscopic, and molecular computational techniques.

  8. Masthead

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Editorial
    5. Graphical Abstract
    6. News
    7. Communications
    8. Full Papers
    9. Masthead
    1. Masthead: ChemPlusChem ChemPlusChem 1/2012 (page 82)

      Article first published online: 17 JAN 2012 | DOI: 10.1002/cplu.201290004

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