Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
ISSN-L : 0366-7022
Volume 40 , Issue 7
Showing 1-42 articles out of 42 articles from the selected issue
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  • Karsten Jennum, Mogens Brøndsted Nielsen
    2011 Volume 40 Issue 7 Pages 662-667
    Published: July 05, 2011
    Released: June 04, 2011
    JOURNALS FREE ACCESS
    Molecules with two orthogonally oriented π-systems (cruciforms) have attracted interest by virtue of the different conjugation pathways that exist between the individual parts of the molecule. In particular, the possibility for changing the conjugation pathways by an external stimulus may provide controllable molecular switches for molecular electronics. Here we highlight our design and synthesis of cruciform molecules incorporating the redox-active unit tetrathiafulvalene (TTF) placed vertically to an oligo(phenyleneethynylene) (OPE) unit. These molecules have potential as redox-controlled wires (transistors) for molecular electronics. The OPE–TTF cruciforms are prepared by a combination of stepwise metal-catalyzed cross-coupling and Wittig reactions.
    Here we highlight our design and synthesis of cruciform molecules incorporating the redox-active unit tetrathiafulvalene (TTF) placed vertically to an oligo(phenyleneethynylene) (OPE) unit. These molecules have potential as redox-controlled wires (transistors) for molecular electronics. Fullsize Image
  • Tao Zhang, Nobuyuki Imanishi, Yasuo Takeda, Osamu Yamamoto
    2011 Volume 40 Issue 7 Pages 668-673
    Published: July 05, 2011
    Released: June 04, 2011
    JOURNALS FREE ACCESS
    Several key issues of aqueous lithium/air rechargeable batteries that consists of a water-stable lithium electrode, an aqueous electrolyte, and a bifunctional air electrode are reviewed. Based on research and discussion of these issues, the challenges and prospects for high energy density aqueous lithium/air rechargeable batteries are described. From a broader perspective, lithium/air rechargeable batteries that employ aprotic electrolytes are also briefly introduced for comparison.
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