ChemPlusChem

Cover image for Vol. 77 Issue 3

March 2012

Volume 77, Issue 3

Pages 149–248

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Graphical Abstract
    5. News
    6. Review
    7. Communications
    8. Full Papers
    1. You have free access to this content
      Cover Picture: Mechanically Interlocked Molecules Assembled by π–π Recognition (ChemPlusChem 3/2012) (page 149)

      Gokhan Barin, Dr. Ali Coskun, Prof. Moustafa M. G. Fouda and Prof. J. Fraser Stoddart

      Version of Record online: 13 MAR 2012 | DOI: 10.1002/cplu.201290010

      Thumbnail image of graphical abstract

      The cover picture shows the construction of mechanically interlocked molecules comprising aromatic π–π stacking interactions which have attracted a vast amount of interest during the past decade. The template-directed synthetic protocols and recognition motifs including donor-acceptor, neutral, and radical interactions are discussed, as well as the potential applications of the resulting mechanically interlocked molecules. Further details can be found in the Review by J. F. Stoddart et al. on page 159 ff.

  2. Masthead

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Graphical Abstract
    5. News
    6. Review
    7. Communications
    8. Full Papers
    1. Masthead: ChemPlusChem 3/2012 (page 150)

      Version of Record online: 13 MAR 2012 | DOI: 10.1002/cplu.201290011

  3. Graphical Abstract

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

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

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Graphical Abstract
    5. News
    6. Review
    7. Communications
    8. Full Papers
    1. Mechanically Interlocked Molecules Assembled by π–π Recognition (pages 159–185)

      Gokhan Barin, Dr. Ali Coskun, Prof. Moustafa M. G. Fouda and Prof. J. Fraser Stoddart

      Version of Record online: 28 FEB 2012 | DOI: 10.1002/cplu.201100075

      Thumbnail image of graphical abstract

      π–π Stacks come in threes: This Review focuses on recent progress made in the assembly of mechanically interlocked molecules utilizing aromatic π–π interactions in various forms as depicted in the illustration. A variety of synthetic strategies and recognition motifs, as well as new directions in their preparation, are highlighted.

  6. Communications

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Graphical Abstract
    5. News
    6. Review
    7. Communications
    8. Full Papers
    1. N-(2-Aminoethyl)glycine and Amino Acids from Interstellar Ice Analogues (pages 186–191)

      Dr. Cornelia Meinert, Dr. Jean-Jacques Filippi, Dr. Pierre de Marcellus, Dr. Louis Le Sergeant d'Hendecourt and Prof. Dr. Uwe J. Meierhenrich

      Version of Record online: 29 FEB 2012 | DOI: 10.1002/cplu.201100048

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      Interstellar ices were simulated by condensing and UV irradiating molecules such as H2O, CH3OH, and NH3 at 80 K. Multidimensional gas chromatography analyses allowed for the identification of 26 amino and diamino acids (see graph). The results support the suggestion that potentially prebiotic molecules originating from the photochemistry of interstellar ices could have been incorporated in cometary dust and delivered to the early Earth.

    2. Identifying the Decomposition Product of Single-Source Precursors: Towards Water-Soluble Quantum Dots (pages 192–195)

      Dr. Mark Green, Lydia Sandiford, Dr. Kirsty M. Anderson and Dr. Yongmin Ma

      Version of Record online: 31 JAN 2012 | DOI: 10.1002/cplu.201100076

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      On the dot: A water-soluble single-source precursor has been used in the synthesis of CdS quantum dots passivated with a nucleotide in an aqueous one-pot reaction (see figure). The crystal structure of the decomposition product of a single-source precursor, 3-methyl-5-(1,2,3,4-tetrahydroxybutyl)oxazolidine-2-thione is also presented. A new decomposition mechanism is suggested that compliments existing routes.

    3. Calix[4]arene-Based 1,3,4-Oxadiazoles: Novel Fluorescent Chemosensors for Specific Recognition of Cu2+ (pages 196–200)

      Dr. Jie Han, Fu-Li Wang, Yu-Xin Liu, Feng-Yan Zhang, Prof. Dr. Ji-Ben Meng and Prof. Dr. Zheng-Jie He

      Version of Record online: 9 FEB 2012 | DOI: 10.1002/cplu.201200004

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      Responds only to Cu2+! Novel fluorescent chemosensors 1,3-alt-1 and cone-1 have been synthesized. They consist of two 1,3,4-oxadiazole units on the upper rim of the calix[4]arene. Both sensors show specific recognition of Cu2+, where the 1,3-alt-1 conformer displayed a better sensitivity than cone-1 for Cu2+.

  7. Full Papers

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Graphical Abstract
    5. News
    6. Review
    7. Communications
    8. Full Papers
    1. Fabrication of Soft Submicrospheres by Sequential Boronate Esterification and Their Dynamic Behavior (pages 201–209)

      Dr. Ryuhei Nishiyabu, Shiori Teraoka, Yusuke Matsushima and Prof. Yuji Kubo

      Version of Record online: 26 JAN 2012 | DOI: 10.1002/cplu.201100008

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      Pyridine-assisted sequential boronate esterification of benzene-1,4-diboronic acid and 1,2,4,5-tetrahydroxybenzene has led to hierarchically structured submicrospheres. The dynamic covalent functionality of the boronate ester linkage enables not only reversible formation by a pH switch but also morphological transformation of the submicrospheres by constitutional exchange reactions (see figure).

    2. One-Step Decatungstate-Photomediated PEGylation of Single-Walled Carbon Nanotubes (pages 210–216)

      Dr. Davide Ravelli, Dr. Sara Montanaro, Dr. Corrado Tomasi, Dr. Pietro Galinetto, Dr. Eliana Quartarone, Dr. Daniele Merli, Prof. Piercarlo Mustarelli and Prof. Maurizio Fagnoni

      Version of Record online: 7 FEB 2012 | DOI: 10.1002/cplu.201100040

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      Off the wall: A straightforward PEGylation of single-walled carbon nanotubes (SWCNTs) has been performed by photomediated addition of various PEG derivatives onto the nanotube surfaces. The reaction was promoted both by UV and by solar light and took place under very mild conditions using commercial PEGs as PEGylating agents (see figure). Interestingly, the functionalization caused a partial dissolution of the resulting CNTs in the reaction medium.

    3. Facile One-Pot Synthesis of ZnO/SnO2 Heterojunction Photocatalysts with Excellent Photocatalytic Activity and Photostability (pages 217–223)

      Lirong Zheng, Yuanhui Zheng, Chongqi Chen, Yingying Zhan, Xinyi Lin, Qi Zheng and Kemei Wei

      Version of Record online: 25 JAN 2012 | DOI: 10.1002/cplu.201100066

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      It′s all about performance: ZnO/SnO2 heterojunction nanocatalysts (see the formation of a ZnO/SnO2 heterojunction in the TEM image) with excellent photocatalytic performances have been synthesized through a simple one-pot solvothermal method. The relationship between their structure and photocatalytic performances, especially antiphotocorrosion property, has been systematically studied.

    4. (−)-(1R,2R,7S,8aR)-1,2,7-Trihydroxyindolizidine ((−)-7S-OH-Lentiginosine): Synthesis and Proapoptotic Activity (pages 224–233)

      Prof. Franca M. Cordero, Dr. Paola Bonanno, Dr. Bhushan B. Khairnar, Dr. Francesca Cardona, Prof. Alberto Brandi, Dr. Beatrice Macchi, Dr. Antonella Minutolo, Prof. Sandro Grelli and Prof. Antonio Mastino

      Version of Record online: 6 FEB 2012 | DOI: 10.1002/cplu.201100069

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      Indolizidine alkaloids: Highly selective and reproducible tert-butylation of enantiopure N-benzyl dihydroxypyrrolidine was exploited in an improved synthesis of 3,4-bis-tert-butoxypyrroline N-oxide for the synthesis of (−)-7S-OH-lentiginosine (see scheme; Bn=benzyl). The introduction of an additional hydroxy group on C7 of the non-natural lentiginosine provides another example of an efficient apoptosis inducer with low cytotoxicity.

    5. Influence of the Second Coordination Shell on the XANES Spectra of the Zn2+ Ion in Water and Methanol (pages 234–239)

      Valentina Migliorati, Andrea Zitolo, Giovanni Chillemi and Paola D'Angelo

      Version of Record online: 26 JAN 2012 | DOI: 10.1002/cplu.201100070

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      Come out of your shell: Molecular dynamics simulations and X-ray absorption near-edge structure (XANES) spectroscopy have been used to investigate the coordination properties of the Zn2+ ion in water and methanol (see graphs; Zn cyan). XANES is sensitive to water molecules in the second hydration shell, meanwhile second-shell methanol molecules provide a negligible contribution. This finding is related to the different structuring ability of the two solvents.

    6. Dual Emitting [Yb(5,7ClQ)2(H5,7ClQ)2Cl]: Chemical and Photophysical Properties (pages 240–248)

      Dr. Flavia Artizzu, Dr. Francesco Quochi, Dr. Michele Saba, Dr. Luciano Marchiò, Dr. Davide Espa, Dr. Angela Serpe, Andrea Mura, Prof. Maria Laura Mercuri, Prof. Giovanni Bongiovanni and Prof. Paola Deplano

      Version of Record online: 15 FEB 2012 | DOI: 10.1002/cplu.201200006

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      A double whammy: The novel quinolinolate complex shows luminescence in the visible (ligand-centered) and near-infrared (NIR; metal-centered) regions. Intersystem crossing (ISC) and resonant energy transfer (RET) occur on an ultrafast timescale with ligand-to-metal sensitization efficiency near unity. The Yb3+ has remarkably high radiative strength but NIR lifetimes are shortened because of quenching effects from the CH groups of the ligand.

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