Advanced Materials

Cover image for Advanced Materials

December 1991

Volume 3, Issue 12

Pages fmi–fmi, 582–629

  1. Masthead

    1. Top of page
    2. Masthead
    3. Essay
    4. Materials Forum
    5. Articles
    6. Communications
    7. Research News
    8. Talking Point
    9. Research News
    10. Book Reviews
    1. Masthead (page fmi)

      Version of Record online: 15 SEP 2004 | DOI: 10.1002/adma.19910031201

  2. Essay

    1. Top of page
    2. Masthead
    3. Essay
    4. Materials Forum
    5. Articles
    6. Communications
    7. Research News
    8. Talking Point
    9. Research News
    10. Book Reviews
    1. ‘Sir humphry davy who abominated gravy…’ (pages 582–589)

      Prof. John Meurig. Thomas

      Version of Record online: 15 SEP 2004 | DOI: 10.1002/adma.19910031202

      Essay: Humphry Davy made many contributions to basic science, including materials science. In this extended Christmas essay, one of the most recent directors of the Royal Institution in London reviews the and work of one of his most illustrious predecessors from a humble beginning as the son of a Cornish woodcarver to the heights of the Presidency of the Royal Society.

  3. Materials Forum

    1. Top of page
    2. Masthead
    3. Essay
    4. Materials Forum
    5. Articles
    6. Communications
    7. Research News
    8. Talking Point
    9. Research News
    10. Book Reviews
    1. Materials Forum (pages 589–599)

      Version of Record online: 15 SEP 2004 | DOI: 10.1002/adma.19910031203

  4. Articles

    1. Top of page
    2. Masthead
    3. Essay
    4. Materials Forum
    5. Articles
    6. Communications
    7. Research News
    8. Talking Point
    9. Research News
    10. Book Reviews
    1. Correlation between primary chemical structure and property phenomena in polycondensates (pages 590–599)

      Dr. Klaus Sommer

      Version of Record online: 15 SEP 2004 | DOI: 10.1002/adma.19910031204

      Review: The property-determining structural elements in high-performance thermoplastics can be investigated with the help of theoretical simulation method of the amorphous cell or dynamic Monte Carlo type. Taking polycarbonates, polyetherketones, and polyethersulphones as examples, the presistences length of structurally valied ploymers (see figure) can be calculated, information which is useful in the development of new plastics and the improvement of existing ones.

      • equation image
  5. Communications

    1. Top of page
    2. Masthead
    3. Essay
    4. Materials Forum
    5. Articles
    6. Communications
    7. Research News
    8. Talking Point
    9. Research News
    10. Book Reviews
    1. A fully conjugated ‘dimeric’ BEDT-TTF system;[l] synthesis, crystal structure, and electrical properties (pages 600–602)

      Martin Adam, Angelika Bohnen, Volker Enkelmann and Prof. Klaus Müllen

      Version of Record online: 15 SEP 2004 | DOI: 10.1002/adma.19910031205

      Communication: The low dimentionality of the charge-carrier transport in conducting BEDT-TTF radical cation salts usually results in a metal-insulator transition. The extended BEDT-TTF derivative presented here contains two TTF moieties in full π conjugation and is the result of research aimed at increasing the dimentionaly of the system. The synthesis and electrochemical properties of the new doner are reported.

    2. An hexagonal columnar mesophase in half-disk-shaped thallium (i) complexes (pages 602–605)

      Dr. Joaquín Barberá, Dr. Carlos Cativiela, Dr. José Luis. Serrano and María Mar Zurbano

      Version of Record online: 15 SEP 2004 | DOI: 10.1002/adma.19910031206

      Communication: The first example of a discotic thallium (I) metallomesogen is reported. The complex is formed by the association of two half-disc-shaped molecules (see figure) and the properties of the liquid crystalline material studied using DSC and X-ray differaction. The materials, with varying numbers of alkyl groups bonded to the central aromatic cores, are also compared with the previously known copper analogues.

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    3. Characterization and optimization of langmuir-blodgett films containing polymer-bound fluorophores (pages 605–608)

      Dr. Hans-Ulrich Siegmund, Dr. Arno Becker and Dr. Dietmar Möbius

      Version of Record online: 15 SEP 2004 | DOI: 10.1002/adma.19910031207

      Communication: The covalent and homogeneous incoporation of fluorophores (coumarin dyes) into Langmuir-Blodgett films of amphiphilic polymethacrylates is reported. Method for optimizing the flourescence and quality of the films, which have potential applications in biosensing, are discussed and the properties of an amphiphilec, monomeric coumarin which forms mixed monolayers with other aphiphiles described.

    4. Sevenfold diamond structure and conductivity of copper dicyanoquinonediimines Cu(DCNQI)2 (pages 608–611)

      Prof. Otto Ermer

      Version of Record online: 15 SEP 2004 | DOI: 10.1002/adma.19910031208

      Communication: The high substituent sensitivity of the electrical conductivity of copper DCNQI radical anion salts (see figure) is atributed to the fact that the stacks of copper atoms and bridging DCNQI ligands are covalently clamped together within the frame work of a sevenfold interpenetrating super diamond architecture. This observation should influence more quantitative approaches to explaining and modeling the conductivity behaviour of the Cu(DCNQI)2 salts.

    5. Selective transport of anions across liquid membranes using the ferrocenium/ferrocene redox couple (pages 611–613)

      Dr. Giancarlo de Santis, Prof. Michela di Casa, Prof. Luigi Fabbrizzi, Dr. Maurizio Licchelli and Dr. Piersandro Pallavicini

      Version of Record online: 15 SEP 2004 | DOI: 10.1002/adma.19910031209

      Communication: Anions can be selectively transported across a bulk liquid membrane by the 1-hexadecylferrocenium ion through a process driven by a chemically generated redox potential gradient. The liquid membrane, a solution in dichloromethane, acts as a filter for anions, being permeable to perchlorate ions and impermeable to choride ions. The alkyl substitution of the ferrocenium ion serves to confine the ion to the membrane phase.

  6. Research News

    1. Top of page
    2. Masthead
    3. Essay
    4. Materials Forum
    5. Articles
    6. Communications
    7. Research News
    8. Talking Point
    9. Research News
    10. Book Reviews
    1. Orientation and dynamics in polymers by infrared dichroism spectroscopy (pages 614–616)

      Dr. Nicholas Reynolds

      Version of Record online: 15 SEP 2004 | DOI: 10.1002/adma.19910031210

      Research News: The oreintation of polymer molecules has a significant effect on the mechanical properties of polymeric materials. Infrared dichroism spectroscopy is a highly sensitive, chemically specific technique for examining the orientation of the electrical dipole moments in molecules ans as such can be applied to the study of the mechanisms of orientational relaxation in entangled polymer melts. The technique and some of its recent applications are presented.

    2. Highly-ordered ultrathin lc multilayer films on solid substrates (pages 617–619)

      Dr. Gero Decher, Dr. Joseph Maclennan, Jürgen Reibel and Ulrich Sohling

      Version of Record online: 15 SEP 2004 | DOI: 10.1002/adma.19910031211

      Research News: Freely suspended thin film of smectic liquid crystalline materials can be described as two-dimensinal fluids with a regular layer structure in the third dimention. By reducing the internal pressure in the set up shown in the figure the films can be transferred onto solid supports allowing their study, manipulation, and potential use in applications such as integrated optics and sensors.

  7. Talking Point

    1. Top of page
    2. Masthead
    3. Essay
    4. Materials Forum
    5. Articles
    6. Communications
    7. Research News
    8. Talking Point
    9. Research News
    10. Book Reviews
    1. A sober and accurate assessment (pages 619–623)

      Prof. Patricia A. Bianconi

      Version of Record online: 15 SEP 2004 | DOI: 10.1002/adma.19910031212

      Talking point: In our September issue, Rustum Roy and John Maddox provided two different points of view concerning a research paper published in Nature. The author of that paper, which is concerned with the synthesis of inorganic/organic composites in which the inorganic crystals display controlled size, shape, and orientation, now presents her opinion, explaining the aims and background to the work, and addressing the criticism levelled both at her work and the field.

  8. Research News

    1. Top of page
    2. Masthead
    3. Essay
    4. Materials Forum
    5. Articles
    6. Communications
    7. Research News
    8. Talking Point
    9. Research News
    10. Book Reviews
    1. Talking point. Are free radicals involved in biodegradation of implanted polymers? (pages 623–626)

      Prof. David F. Williams and Sheng P. Zhong

      Version of Record online: 15 SEP 2004 | DOI: 10.1002/adma.19910031213

      Research News/Talking Point: The role of cells and cellular products in polymer degradation is an important factor in examining the biocompatibility and performance of polymer-based implants in surgery. Cells release many enzymes and biologically active species into their environment, a fact which makes it difficult to distinguish which released factor is dominant in any cell-mediated degradation of implanted materials. The various possibilities are discussed and a mechanism involving free radicals proposed.

  9. Book Reviews

    1. Top of page
    2. Masthead
    3. Essay
    4. Materials Forum
    5. Articles
    6. Communications
    7. Research News
    8. Talking Point
    9. Research News
    10. Book Reviews

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