ChemPhysChem

Cover image for Vol. 8 Issue 7

Special Issue: Topical Issue: Carbon Nanomaterials

May 14, 2007

Volume 8, Issue 7

Pages 961–1122

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Graphical Abstract
    4. News
    5. Review
    6. Minireview
    7. Communications
    8. Articles
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    1. Cover Picture: Optical Fourier Transform Spectroscopy of Single-Walled Carbon Nanotubes and Single Molecules (ChemPhysChem 7/2007) (page 961)

      Rafał Korlacki, Mathias Steiner, Huihong Qian, Achim Hartschuh and Alfred J. Meixner

      Version of Record online: 2 MAY 2007 | DOI: 10.1002/cphc.200790018

      The cover picture shows a single terrylene molecule emitting single fluorescence photons one by one that are guided into a Michelson interferometer. The signal I(z) recorded from the fluorescence emission shows the typical intensity modulations of an interferogram depending on the path length difference z of the two interferometer arms. Although the molecule suddenly stopped to emit fluorescence photons during data acquisition, a reliable spectrum J(equation image) can be obtained by Fourier transformation. Find out more in the Article by Korlacki et al. on page 1049.

  2. Graphical Abstract

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

    1. Top of page
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    3. Graphical Abstract
    4. News
    5. Review
    6. Minireview
    7. Communications
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  4. Review

    1. Top of page
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    1. Spectroelectrochemistry of Carbon Nanostructures (pages 974–998)

      Ladislav Kavan and Lothar Dunsch

      Version of Record online: 2 MAY 2007 | DOI: 10.1002/cphc.200700081

      Thumbnail image of graphical abstract

      Nanocarbons are modified in their electronic structure by electrochemical charge-transfer reactions. Raman spectroelectrochemistry is applied in studies of carbon nanostructures (see figure showing Raman spectra of single-walled nanotubes on a Pt electrode), while electron spin resonance and optical absorption are important for the spectroelectrochemistry of fullerenes.

  5. Minireview

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    1. Mechanical Properties of Carbon Nanomaterials (pages 999–1004)

      Takuya Hayashi, Yoong Ahm Kim, Toshiaki Natsuki and Morinobu Endo

      Version of Record online: 2 MAY 2007 | DOI: 10.1002/cphc.200700077

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      Carbon nanotube composites: This Minireview focuses on the mechanical properties of carbon nanotubes (CNTs) and their composite materials. Some recently developed components made of carbon nanotube composite materials are introduced and their importance for applications in everyday life is outlined. The picture shows CNTs grown from a porous substrate.

  6. Communications

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    1. Charge–Metal Interaction of a Carbon Nanotube (pages 1005–1008)

      Evangelos Bakalis and Francesco Zerbetto

      Version of Record online: 12 MAR 2007 | DOI: 10.1002/cphc.200600715

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      Simple three-dimensional functions: Carbon nanotubes can be semiconducting or metallic and, yet, their interactions with other molecules are often treated as if they were all the same. The authors develop two simple three-dimensional functions that describe the extra energy of interaction of a charge with a metallic nanotube. This energy depends on the radius of the tube and the distance of the charge from either the inner or outer surface of the conducting tube.

    2. An Electrokinetic Method for Rapid Synthesis of Nanotubes (pages 1009–1012)

      Wei Chen and Xing-Hua Xia

      Version of Record online: 13 FEB 2007 | DOI: 10.1002/cphc.200600711

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      Templated nanotubes: Electroosmotic flow causes charged ions to move into nanochannels of a porous membrane when a potential is applied (see picture). A reaction zone is established in the channels, and nanotubes are deposited. Subsequent dissolution of the membrane yields an array of nanotubes.

    3. A Novel Approach Towards Carbon–Ru Electrodes with Mesoporosity for Supercapacitors (pages 1013–1015)

      Guanglei Cui, Linjie Zhi, Arne Thomas, Ingo Lieberwirth, Ute Kolb and Klaus Müllen

      Version of Record online: 5 APR 2007 | DOI: 10.1002/cphc.200600789

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      Novel composites for supercapacitors: Carbon–Ru nanocomposites with mesoporous structures and homogeneously dispersed Ru nanoparticles in the carbon matrix (see SEM and TEM images), obtained by a simple pyrolysis procedure, display capacitive properties for supercapacitors.

    4. Water Molecules Adsorbed at Electrode Surfaces Determine the Macroscopic Contact Angles (pages 1016–1018)

      Tomoyuki Nagai, Shuji Nakanishi and Yoshihiro Nakato

      Version of Record online: 5 APR 2007 | DOI: 10.1002/cphc.200700093

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      Wetting properties: Contact angle measurements of an oil droplet put on H2SO4|Pt(111) and H2SO4|Au(111) electrochemical interfaces have revealed that particular atomic arrangements of adsorbed water molecules determine the macroscopic wetting properties.

  7. Articles

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    1. Magnetic Properties and Crystal Structure of Solvent-Free Sc@C82 Metallofullerene Microcrystals (pages 1019–1024)

      Yasuhiro Ito, Wataru Fujita, Toshiya Okazaki, Toshiki Sugai, Kunio Awaga, Eiji Nishibori, Masaki Takata, Makoto Sakata and Hisanori Shinohara

      Version of Record online: 10 APR 2007 | DOI: 10.1002/cphc.200700097

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      Abnormal behavior of the magnetic susceptibility of solvent-free Sc@C82 microcrystals is observed between 120 K and 200 K (see figure). The presence of the antiferromagnetic-like interaction exerted among Sc@C82 molecules restricts the molecular rotation to uniaxial.

    2. Dendritic Morphology in Homeotropically Aligned Discotic Films (pages 1025–1028)

      Wojciech Pisula, Marcel Kastler, Bassem El Hamaoui, Mari-Cruz García-Gutiérrez, Richard J. Davies, Christian Riekel and Klaus Müllen

      Version of Record online: 23 MAR 2007 | DOI: 10.1002/cphc.200600787

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      Dendritic morphology: A homeotropically self-oriented discotic liquid-crystalline hexa-peri-hexabenzocoronene reveals a dendritic morphology resulting from film dewetting (see figure: 3D confocal surface measurement) when processed from the isotropic phase. This dewetting process reduces the contact area between the material and the surface.

    3. Structures, Stabilities, and Electronic and Optical Properties of C58 Fullerene Isomers, Ions, and Metallofullerenes (pages 1029–1036)

      De-Li Chen, Wei Quan Tian, Ji-Kang Feng and Chia-Chung Sun

      Version of Record online: 12 MAR 2007 | DOI: 10.1002/cphc.200600785

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      C58fullerene: The classic fullerene C58(C3v:0001) and the quasi-fullerene C58(Cs:hept) with a heptagonal ring not only possess the lowest energies among all of the C58 isomers, but also prevail in a large range of temperatures (see picture). Analyses show that C58 fullerene has larger second-order hyperpolarizabilities than those of C60.

    4. Scanning Tunneling Microscopy and Spectroscopy Studies of 4-Methyl- 4′-(n-mercaptoalkyl)biphenyls on Au(111)-(1×1) (pages 1037–1048)

      Gujin J. Su, Rocio Aguilar-Sanchez, Zhihai Li, Ilya Pobelov, Melanie Homberger, Ulrich Simon and Thomas Wandlowski

      Version of Record online: 2 MAY 2007 | DOI: 10.1002/cphc.200600781

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      Building bridges: Self-assembled adlayers of biphenylalkanthioles BPn (CH3[BOND]C6H4[BOND]C6H4[BOND](CH2)n[BOND]SH, n=3–6) were studied at the Au(111)-(1×1)/mesitylene interface under ambient conditions by STM and STS. The local electronic properties of Au tip|BPn|Au(111)-(1×1) junctions were characterized by current–distance and current–voltage spectroscopy in a large current range (μA) and at bias voltages up to ±3 V.

    5. Optical Fourier Transform Spectroscopy of Single-Walled Carbon Nanotubes and Single Molecules (pages 1049–1055)

      Rafał Korlacki, Mathias Steiner, Huihong Qian, Achim Hartschuh and Alfred J. Meixner

      Version of Record online: 12 MAR 2007 | DOI: 10.1002/cphc.200600739

      Thumbnail image of graphical abstract

      Single-molecule optical Fourier transform spectroscopy in combination with confocal microscopy is used for the first time for Raman and fluorescence studies of spatially isolated single-walled carbon nanotubes and single terrylene molecules. The picture shows a schematic diagram of the optical setup that was used to measure two beam interferograms from molecular emission.

    6. Nonlinear Optical Properties of Ferrocene- and Porphyrin–[60]Fullerene Dyads (pages 1056–1064)

      Evangelia Xenogiannopoulou, Miroslav Medved, Kostas Iliopoulos, Stelios Couris, Manthos G. Papadopoulos, Davide Bonifazi, Chloè Sooambar, Aurelio Mateo-Alonso and Maurizio Prato

      Version of Record online: 12 MAR 2007 | DOI: 10.1002/cphc.200600760

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      Improved responses: Novel fullerene dyads (see figure) exhibit an enhancement of their nonlinear optical response compared to pristine fullerenes. There is good agreement between the semiempirical calculations and the measured hyperpolarizability [by the optical Kerr effect (OKE)], suggesting that simple semiempirical methods can be employed for the design and optimization of fullerene dyads.

    7. Imaginary Vibrational Modes in Polycyclic Aromatic Hydrocarbons: A Challenging Test for the Hardness Profiles (pages 1065–1070)

      Miquel Torrent-Sucarrat, Paul Geerlings and Josep M. Luis

      Version of Record online: 22 FEB 2007 | DOI: 10.1002/cphc.200700011

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      Performance test: The energy (—, in figure) and equation image(- - - -) and equation image (–•–•) hardness profiles calculated for molecular distortions of benzene along the imaginary vibrational mode at the MP2/6-311G level show a lack of correspondence between the number of stationary points. This indicates the incorrectness of the energy profile.

    8. Adsorption Properties of the Penicillin Derivative DTPA on Gold Substrates (pages 1071–1076)

      Laurent Dreesen, Christophe Silien, Cédric Volcke, Yannick Sartenaer, Paul A. Thiry, André Peremans, Jerome Grugier, Jacqueline Marchand-Brynaert, Alain Brans, Stana Grubisic and Bernard Joris

      Version of Record online: 2 MAY 2007 | DOI: 10.1002/cphc.200700087

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      Immobilized antibiotics: A penicillin derivative is synthesized with a sulfur-containing terminal group, which allows it to anchor to metallic substrates. This molecule spontaneously forms self-assembled monolayers on gold substrates (see picture) without alteration of the penicillin pharmacophore properties.

    9. Molecular Dynamics Simulations of CN Dynamics and Spectroscopy in Myoglobin (pages 1077–1084)

      Jonas Danielsson and Markus Meuwly

      Version of Record online: 16 APR 2007 | DOI: 10.1002/cphc.200700042

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      Ligand–protein interactions: Molecular dynamics simulations are used to investigate the vibrational dynamics of the cyanide anion and the heme group for cyanide bound to myoglobin (see picture). The resulting structural dynamics are analyzed and the IR absorption spectra of the ligand stretches are extracted. Different ligand binding modes and protonation states are considered.

    10. Theoretical Prediction and the First IR Matrix Observation of Several L-Cysteine Molecule Conformers (pages 1085–1094)

      Jan Cz. Dobrowolski, Michał H. Jamróz, Robert Kołos, Joanna E. Rode and Joanna Sadlej

      Version of Record online: 11 APR 2007 | DOI: 10.1002/cphc.200600784

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      Cold conformers: Argon-matrix low-temperature IR spectra of cysteine are recorded and compared to calculated spectra. The presence of at least three cysteine conformers, both with and without intramolecular hydrogen bonding, can be observed. The presence of several conformers is illustrated in the picture, which shows the ν(SH) stretching vibrations.

    11. Photophysics and X-ray Structure of Crystalline 2-Aminopurine (pages 1095–1102)

      Robert K. Neely, Steven W. Magennis, Simon Parsons and Anita C. Jones

      Version of Record online: 27 MAR 2007 | DOI: 10.1002/cphc.200600593

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      Interbase interactions in DNA are mimicked in the crystal lattice of 2-aminopurine, a fluorescent analogue of adenine (see picture). π-stacking interaction between 2-aminopurine molecules in the crystal produces a low-energy excited state, showing redshifted emission.

    12. New Types of Brönsted Acid–Base Ionic Liquids-Based Membranes for Applications in PEMFCs (pages 1103–1107)

      Alessandra Fernicola, Stefania Panero, Bruno Scrosati, Masahiro Tamada and Hiroyuki Ohno

      Version of Record online: 28 MAR 2007 | DOI: 10.1002/cphc.200600782

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      Better than the sum of its parts: A series of ionic liquids are prepared by neutralizing tertiary amines with N,N-bis(trifluoromethanesulfonyl)imide (HX, see scheme). These ionic liquids have very good temperature stability and high ionic conductivity. By incorporating them into a poly(vinylidenfluoride-co-hexafluoropropylene) polymer matrix, membranes with a high melting temperature, decomposition point and ionic conductivity are obtained.

    13. Simultaneous Tuning of Chemical Composition and Topography of Copolymer Surfaces: Micelles as Building Blocks (pages 1108–1114)

      Ning Zhao, Xiaoyan Zhang, Xiaoli Zhang and Jian Xu

      Version of Record online: 16 APR 2007 | DOI: 10.1002/cphc.200700032

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      Wetting behavior of copolymer poly(styrene)-b-poly(dimethylsiloxane) is facilely controlled by casting the copolymer from selective solvents. As can be seen in the SEM images shown in the picture, alternately exposing the surface to butanone or DMF allows reversible switching from a hydrophobic (left) to a superhydrophobic (right) state. The insets show the water contact angles.

    14. Titanium-Containing Zeolites and Microporous Molecular Sieves as Photovoltaic Solar Cells (pages 1115–1119)

      Pedro Atienzar, Susana Valencia, Avelino Corma and Hermenegildo García

      Version of Record online: 5 APR 2007 | DOI: 10.1002/cphc.200700019

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      Light catcher: Titanium-containing zeolites give a photovoltaic response when used in dye-sensitized solar cells. The picture shows a schematic depiction of such a cell. The dye is adsorbed on the surface titanium atoms of the zeolite, which is sandwiched between two transparent glass and conducting oxide electrodes.

  8. Preview

    1. Top of page
    2. Cover Picture
    3. Graphical Abstract
    4. News
    5. Review
    6. Minireview
    7. Communications
    8. Articles
    9. Preview
    1. Preview: ChemPhysChem 8/2007 (page 1122)

      Version of Record online: 2 MAY 2007 | DOI: 10.1002/cphc.200790017

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