Journal of the Japan Society of Colour Material
Online ISSN : 1883-2199
Print ISSN : 0010-180X
ISSN-L : 0010-180X
Search
Advanced search
OR
Browse
Search
Volume 83, Issue 7
Displaying 1-4 of 4 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
Original Research Paper
  • Photochromism of a 2-Hydroxy-4’-Methoxychalcone/Silica Composite
    Yuta KAWANO, Takakazu TAKENOUCHI, Yoshiumi KOHNO, Ryoka MATSUSHIMA, Ma ...
    2010 Volume 83 Issue 7 Pages 289-294
    Published: July 20, 2010
    Released on J-STAGE: October 20, 2010
    DOIhttps://doi.org/10.4011/shikizai.83.289
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A synthetic anthocyanin pigment, 2-hydroxy-4’-methoxychalcone (HMC), has the same molecular skeleton as plant pigments and promises to be practically applicable as a safe and environmentally friendly photochromic pigment. With the objective of using HMC in dry conditions, we prepared a composite of silica and HMC and investigated its photochromic properties. In order to maximize the adsorption of HMC onto silica, we prepared a HMC solution with UV-A irradiation at pH 3.7 in which HMC was mainly in the flavylium cation form. Unlike the HMC solution, the HMC/silica composite did not exhibit optical decoloring under UV-C irradiation : only coloration was observed under UV-A irradiation. On the other hand, decoloration occurred in the dark within five days, and occurred more readily at a higher temperature and higher humidity than normal.
    View full abstract
    Download PDF (529K)
Digest
  • Advanced Polymer Materials Synthesized by New Living Radical Polymerization Method
    Takashi KAMESHIMA
    2010 Volume 83 Issue 7 Pages 295-299
    Published: July 20, 2010
    Released on J-STAGE: October 20, 2010
    DOIhttps://doi.org/10.4011/shikizai.83.295
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Living radical polymerization (LRP) has become an increasingly important tool for the synthesis of advanced polymer materials. An alternative and more attractive strategy would be to use living radical polymerizations, which are now widely used for the controlled polymerization of a variety of functionalized monomers.
    Organotellurium-mediated living radical polymerization (TERP) using an organotellurium compound as a promoter is one of the living radical polymerization methods. Compared with the conventional living radical polymerization, TERP has a wide monomer compatibility (applicability) from acrylates and styrene to non-conjugated vinyl monomers, along with a molecular-weight controllability even in a high molecular-weight range over 100,000.
    View full abstract
    Download PDF (872K)
Review
  • Studies on Molecular Penetration through Metal Films by Inelastic Electron Tunneling Spectroscopy
    Morihide HIGO, Masaru MITSUSHIO
    2010 Volume 83 Issue 7 Pages 300-307
    Published: July 20, 2010
    Released on J-STAGE: October 20, 2010
    DOIhttps://doi.org/10.4011/shikizai.83.300
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Studies on penetration of sample molecules (infusion doping) through metal-top electrodes of tunneling junctions of metal/insulator/metal by inelastic electron tunneling spectroscopy (IETS) were reviewed. IETS gives a detailed vibrational spectrum of adsorbed species on the insulator of the junction. It was found that water molecules penetrate the metal-top films (Au or Pb) along grain boundaries and reach the insulator surfaces, which result in the changes of the interface properties. Sample molecules were found to penetrate the metal films together with water molecules and are adsorbed on the insulator surfaces of the junctions. Tunneling spectra by penetrated molecules are identical to those obtained by doping from the vapors or solutions. Changes of junction resistances and those in the morphology of the lead-top films by infusion doping were also observed.
    View full abstract
    Download PDF (1147K)
Serial Lecture
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top