Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
ISSN-L : 0366-7022
Volume 39 , Issue 12
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  • Harry L. Tuller, Sean R. Bishop
    2010 Volume 39 Issue 12 Pages 1226-1231
    Published: December 05, 2010
    Released: November 13, 2010
    JOURNALS RESTRICTED ACCESS
    Many advanced materials today derive their function from precise control of point defects. Through manipulation of point defects, the electrical, optical, mechanical, and other properties of materials can be systematically modified and optimized. This feature paper illustrates the type of progress that has been made in understanding the often complex equilibria exhibited by many materials and shows, by use of examples, how this knowledge can be applied to tailor materials’ properties through defect engineering. Examples which highlight key points of defect engineering include: dark conductivity of radiation detectors, chemomechanics and nanoionics of solid oxide fuel cell materials, sensitivity of high frequency resonators for high-temperature mass measurements, and emission lifetime and luminescence intensity of phosphor materials.
  • Arihiro Kanazawa, Shokyoku Kanaoka, Sadahito Aoshima
    2010 Volume 39 Issue 12 Pages 1232-1237
    Published: December 05, 2010
    Released: October 30, 2010
    JOURNALS RESTRICTED ACCESS
    Recent advancements in living cationic polymerization of vinyl ethers are reviewed, especially focusing on newly developed initiating systems using various Lewis acid catalysts. In concert with the diversification of efficient metal halide catalysts, several types of initiators (cationogens) have been shown to mediate living polymerization, in which the nature of the central metals is responsible for the polymerization behavior. Other types of initiating systems, e.g., living cationic polymerization using metal oxides as solid catalysts and Lewis acid-free systems, are also summarized, as well as the applications of the polymerization for the synthesis of functional poly(vinyl ether)s.
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