ChemPhysChem

Cover image for Vol. 8 Issue 15

October 22, 2007

Volume 8, Issue 15

Pages 2145–2274

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Graphical Abstract
    4. News
    5. Review
    6. Concept
    7. Communications
    8. Articles
    9. Preview
    1. Cover Picture: Hydration of the Calcium Dication: Direct Evidence for Second Shell Formation from Infrared Spectroscopy (ChemPhysChem 15/2007) (page 2145)

      Matthew F. Bush, Richard J. Saykally and Evan R. Williams

      Article first published online: 10 OCT 2007 | DOI: 10.1002/cphc.200790049

      Thumbnail image of graphical abstract

      The cover picture shows infrared photodissociation action spectra of hydrated divalent calcium ions. Electrospray ionization is used to produce the calcium ions which are then introduced into the ion cell of a Fourier-transform ion cyclotron resonance mass spectrometer where their infrared photodissociation action spectra are measured as a function of cluster size to reveal information about coordination number and hydrogen bonding. In their article on page 2245, Bush et al. demonstrate the effectiveness of infrared ion spectroscopy to probe the structure of hydrated ions.

  2. Graphical Abstract

    1. Top of page
    2. Cover Picture
    3. Graphical Abstract
    4. News
    5. Review
    6. Concept
    7. Communications
    8. Articles
    9. Preview
    1. Graphical Abstract: ChemPhysChem 15/2007 (pages 2147–2153)

      Article first published online: 10 OCT 2007 | DOI: 10.1002/cphc.200790050

  3. News

    1. Top of page
    2. Cover Picture
    3. Graphical Abstract
    4. News
    5. Review
    6. Concept
    7. Communications
    8. Articles
    9. Preview
  4. Review

    1. Top of page
    2. Cover Picture
    3. Graphical Abstract
    4. News
    5. Review
    6. Concept
    7. Communications
    8. Articles
    9. Preview
    1. Coherent anti-Stokes Raman Scattering Microscopy (pages 2156–2170)

      Michiel Müller and Andreas Zumbusch

      Article first published online: 4 SEP 2007 | DOI: 10.1002/cphc.200700202

      Thumbnail image of graphical abstract

      Selectivity without damage: Coherent anti-Stokes Raman scattering (CARS) microscopy is a highly sensitive and chemically selective optical imaging technique which does not require sample labeling. The nonlinear optical nature of the contrast mechanism offers high-3D resolution as well as low-average excitation intensities—two properties that make the method ideally suitable for live-cell imaging.

  5. Concept

    1. Top of page
    2. Cover Picture
    3. Graphical Abstract
    4. News
    5. Review
    6. Concept
    7. Communications
    8. Articles
    9. Preview
    1. “Nanoions”: Fundamental Properties and Analytical Applications of Charged Nanoparticles (pages 2171–2176)

      Kyle J. M. Bishop and Bartosz A. Grzybowski

      Article first published online: 31 AUG 2007 | DOI: 10.1002/cphc.200700349

      Thumbnail image of graphical abstract

      Nano-electrostatics: Sharp precipitation at the point of electroneutrality (see figure) is achieved for mixtures of oppositely charged nanoparticles (NPs). This behavior—reminiscent of the threshold precipitation of inorganic ions—is specific to the nanoscale and can be attributed to the formation of like-charged NP clusters stabilized in solution by mutual electrostatic repulsions.

  6. Communications

    1. Top of page
    2. Cover Picture
    3. Graphical Abstract
    4. News
    5. Review
    6. Concept
    7. Communications
    8. Articles
    9. Preview
    1. Hierarchical Organisation on a Two-Dimensional Supramolecular Network (pages 2177–2181)

      Paul A. Staniec, Luís M. A. Perdigão, Alex Saywell, Neil R. Champness and Peter H. Beton

      Article first published online: 13 SEP 2007 | DOI: 10.1002/cphc.200700513

      Thumbnail image of graphical abstract

      Supramolecular template: A new intermixed phase of PTCDI (perylene tetra-carboxylic di-imide) and melamine on Au(111) surfaces is shown to generate arrays of parallelogram-shaped pores capable of stabilising C60 dimers (see figure). The non-random pore occupancy implies that the supramolecular network imposes a hierarchy of organisation.

    2. A Novel Cobalt Submicro-Wire Network and Its Magnetic Properties (pages 2182–2184)

      Mingyun Guan, Jianhua Sun, Cuiling Gao, Xun Li and Zheng Xu

      Article first published online: 8 OCT 2007 | DOI: 10.1002/cphc.200700471

      Thumbnail image of graphical abstract

      Novel networks: Novel cobalt wire network structures are synthesized by a simple hydrothermal process. The network mesh-size can be tuned by solution concentration. Magnetic hysteresis loops (see figure) show that the coercive force is enhanced compared to bulk Co.

    3. Distinction of ortho- and para-Xylene by Femtosecond-Laser Mass Spectrometry (pages 2185–2188)

      Gunter Urbasch, Hans Georg Breunig and Karl-Michael Weitzel

      Article first published online: 1 OCT 2007 | DOI: 10.1002/cphc.200700498

      Thumbnail image of graphical abstract

      Isomer distinction: Using femtosecond-laser mass spectrometry structural isomers of xylene, that exhibit almost identical conventional electron impact mass spectra, can be distinguished. For femtosecond-pulse ionization the ion yields of the atomic fragments C+ and C2+ carry the memory of the structural identity of their parent molecules.

  7. Articles

    1. Top of page
    2. Cover Picture
    3. Graphical Abstract
    4. News
    5. Review
    6. Concept
    7. Communications
    8. Articles
    9. Preview
    1. Stochastic Detection of Motor Protein–RNA Complexes by Single-Channel Current Recording (pages 2189–2194)

      Yann Astier, Denis E. Kainov, Hagan Bayley, Roman Tuma and Stefan Howorka

      Article first published online: 20 SEP 2007 | DOI: 10.1002/cphc.200700179

      Thumbnail image of graphical abstract

      Strand translocation: The reversible formation of complexes between nucleic acids and proteins is detected using nanopore recordings to monitor current blockades caused by protein-bound nucleic acid strands. The picture shows a strand of oligoribonucleotide threaded through the central pore lumen of α-hemolysin and a P4 ATPase hexamer, and a representative single-channel current trace.

    2. In Situ Spectroscopic Characterization of Rectifying Molecular Monolayers Self-Assembled on Gold (pages 2195–2201)

      Alberto Girlando, Cristina Sissa, Francesca Terenziani, Anna Painelli, Anna Chwialkowska and Geoffrey J. Ashwell

      Article first published online: 8 OCT 2007 | DOI: 10.1002/cphc.200700447

      Thumbnail image of graphical abstract

      In situ characterization of rectifying molecular monolayers elucidate the rectification mechanism. Visible, Raman and IR spectra of Q3CNQ self-assembled monolayers on gold surfaces (see figure) are compared with Langmuir–Blodgett films of the same chromophore, showing that molecular polarity depends on the tilt angle of the molecule to the surface.

    3. Conformational Influence on the Type of Stabilization of Sulfur Radical Cations in Cyclic Peptides (pages 2202–2210)

      Gordon L. Hug, Krzysztof Bobrowski, Dariusz Pogocki, Gerald Hörner and Bronislaw Marciniak

      Article first published online: 1 OCT 2007 | DOI: 10.1002/cphc.200700369

      Thumbnail image of graphical abstract

      Under the influence: The difference in the native configurations of the two optical isomers of cyclo-Met-Met (see picture) results in contrasting behavior in the intramolecular stabilization of sulfur radical cations by the unoxidized sulfur in the neighboring methionine upon radiolytically-induced oxidation. Cyclo-(D-Met-L-Met) (right) serves as a better model for calmodulin than cyclo-(L-Met-L-Met) (left).

    4. States of Water Located in the Continuous Organic Phase of 1-Butyl-3-methylimidazolium Tetrafluoroborate/Triton X-100/Triethylamine Reverse Microemulsions (pages 2211–2217)

      Na Li, Quan Cao, Yanan Gao, Jin Zhang, Liqiang Zheng, Xiangtao Bai, Bin Dong, Zhen Li, Mingwei Zhao and Li Yu

      Article first published online: 20 SEP 2007 | DOI: 10.1002/cphc.200700382

      Thumbnail image of graphical abstract

      Microreactor: Ionic liquid droplets dispersed in organic media with the aid of a surfactant function as a new type of microreactor for base-catalyzed reactions. The authors perform extensive experimental analysis on the solubilization of water within these microemulsions and elucidate that the single-phase region (μE, in figure) consists of microdroplets.

    5. Dipeptide Structure Determination by Vibrational Circular Dichroism Combined with Quantum Chemistry Calculations (pages 2218–2226)

      Kyung-Koo Lee, Kwang-Im Oh, Hochan Lee, Cheonik Joo, Hogyu Han and Minhaeng Cho

      Article first published online: 17 SEP 2007 | DOI: 10.1002/cphc.200700352

      Thumbnail image of graphical abstract

      Protein vibrations: Combined experimental studies and theoretical calculations determine the solution structure and the local solvation environments of alanine dipeptide (AD, see PII conformation in the figure) and its isotopomer (AD*).

    6. Development of New Glass Composite Membranes and their Properties for Low Temperature H2/O2 Fuel Cells (pages 2227–2234)

      T. Uma and M. Nogami

      Article first published online: 17 SEP 2007 | DOI: 10.1002/cphc.200700276

      Thumbnail image of graphical abstract

      Advanced fuel cells: A new glass electrode membrane PWA/TiO2–P2O5–SiO2 is synthesized and its structural properties relevant to proton conduction are elucidated by infrared spectroscopy. When characterized at low temperature this membrane displays a maximum power density of 46.3 mW cm−2 and a current density value of 175 mA cm−2 at 0.2 V (see figure).

    7. Infrared Spectra of Protonated Uracil, Thymine and Cytosine (pages 2235–2244)

      Jean-Yves Salpin, Sébastien Guillaumont, Jeanine Tortajada, Luke MacAleese, Joël Lemaire and Philippe Maitre

      Article first published online: 1 OCT 2007 | DOI: 10.1002/cphc.200700284

      Thumbnail image of graphical abstract

      Tautomeric behavior of nucleobases: The gas-phase structures of protonated uracil, thymine, and cytosine are studied by using mid-infrared multiple-photon dissociation (IRMPD) spectroscopy. The authors conclude that two tautomeric ions, namely, an enolic ion and an oxo ion, are formed under their experimental conditions for all three cases.

    8. Hydration of the Calcium Dication: Direct Evidence for Second Shell Formation from Infrared Spectroscopy (pages 2245–2253)

      Matthew F. Bush, Richard J. Saykally and Evan R. Williams

      Article first published online: 18 SEP 2007 | DOI: 10.1002/cphc.200700404

      Thumbnail image of graphical abstract

      Infrared action spectra of hydrated divalent calcium ions provide evidence that calcium directly coordinates six water molecules in the gas phase and that subsequent water molecules are incorporated into outer solvent shells (see picture). These spectra also reveal detailed structural information, such as multiple hydrogen-bonding motifs for Ca2+(H2O)7.

    9. Insight into the Origin of the Thermosensitivity of Poly[2-(dimethylamino)ethyl methacrylate] (pages 2254–2259)

      Guangming Liu, Dan Wu, Chengcheng Ma, Guangzhao Zhang, Hongfei Wang and Shihe Yang

      Article first published online: 18 SEP 2007 | DOI: 10.1002/cphc.200700464

      Thumbnail image of graphical abstract

      Conformational changes: Poly[2-(dimethylamino)ethyl methacrylate] (PDEM) possesses pH-dependent thermosensitivity in aqueous solution (see figure), since the tertiary amine groups along the chain can be charged and uncharged at low and high pH values. Spectroscopic techniques are used to determine the orientation of polymer chains at the air/water interface at low, neutral and high pH.

    10. Electrochemically Induced Growth of Zinc Oxide (pages 2260–2264)

      Dennis Palms, Jochen Norwig and Gerhard Wegner

      Article first published online: 26 SEP 2007 | DOI: 10.1002/cphc.200700330

      Thumbnail image of graphical abstract

      Crystallisation kinetics of zinc oxide (see picture) in the presence of different polymers are investigated by amperometry according to Avrami and Johnson–Mehl's theory. Polymer additives dramatically changed the morphology of the ZnO films, because they influence the relative growth velocity of the crystal faces.

    11. You have free access to this content
      IR and NMR Properties of Ionic Liquids: Do They Tell Us the Same Thing? (pages 2265–2269)

      Alexander Wulf, Koichi Fumino, Dirk Michalik and Ralf Ludwig

      Article first published online: 1 OCT 2007 | DOI: 10.1002/cphc.200700508

      Thumbnail image of graphical abstract

      Good relations are important! Relations between IR and NMR spectroscopic properties provide detailed information about the structure and dynamics of ionic liquids. This is shown for vibrational frequencies, chemical shifts, quadrupole coupling constants, and reorientational correlation times of imidazolium cations in [CnMIM][SCN]. These relations are valid for all ionic liquids—no matter what cation/anion combination is used.

  8. Preview

    1. Top of page
    2. Cover Picture
    3. Graphical Abstract
    4. News
    5. Review
    6. Concept
    7. Communications
    8. Articles
    9. Preview
    1. You have free access to this content
      Preview: ChemPhysChem 16/2007 (page 2274)

      Article first published online: 10 OCT 2007 | DOI: 10.1002/cphc.200790052

SEARCH

SEARCH BY CITATION