Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
ISSN-L : 0366-7022
Volume 44 , Issue 5
Showing 1-45 articles out of 45 articles from the selected issue
Highlight Review
  • Jack D. Evans, Christopher J. Sumby, Christian J. Doonan
    2015 Volume 44 Issue 5 Pages 582-588
    Published: May 05, 2015
    Released: May 05, 2015
    [Advance publication] Released: February 14, 2015
    JOURNALS FREE ACCESS
    Solids composed of shape-persistent organic cage molecules are an emerging class of porous materials. Research in this area has recently progressed from understanding the nature of porosity in these materials to finding applications suited to their unique properties. For example, given that the cages are held together in the solid state by relatively weak (compared to covalent interactions) dispersion forces, the resultant materials are structurally flexible and thus physical properties, such as porosity, that can be modulated according to the adsorbate to which it is exposed. Moreover, discrete cages are soluble and can thus be reprecipitated as structural polymorphs that possess different properties, or processed into thin layers or composite materials such as mixed matrix membranes. In this review, we highlight the synthetic strategies that have been employed to produce porous organic cages and discuss recent advances in design concepts that have led to ultraporous solids. We will also canvass recent applications of these materials and posit potential areas of development.
    Solids composed of shape-persistent organic cage molecules are an emerging class of porous materials. Research in this area has, recently, progressed from understanding the nature of porosity in these materials to finding applications suited to their unique properties. For example, given that the cages are held together in the solid state by relatively weak (compared to covalent interactions) dispersion forces, the resultant materials are structurally flexible and thus physical properties, such as porosity, can be modulated according to the adsorbate it is exposed to. Moreover, discrete cages are soluble and can thus be reprecipitated as structural polymorphs that possess different properties, or processed into thin layers or composite materials such as mixed matrix membranes. In this review, we highlight the synthetic strategies that have been employed to produce porous organic cages and discuss recent advances in design concepts that have led to ultraporous solids. We will also canvass recent applications of these materials and posit potential areas of development. Fullsize Image
     
Letter
Editor’s Choice
  • Jiaxing Song, Ji Bian, Enqiang Zheng, Xiao-Feng Wang, Wenjing Tian, Ts ...
    2015 Volume 44 Issue 5 Pages 610-612
    Published: May 05, 2015
    Released: May 05, 2015
    [Advance publication] Released: February 07, 2015
    JOURNALS OPEN ACCESS
    ZnO thin films prepared by spin-coating of nanoparticles at low temperature were utilized as the electron collection layer in CH3NH3PbI3-based perovskite solar cells having a planar heterojunction structure. The thickness of ZnO layer as a key parameter to determine the photovoltaic performance was optimized. The highest power conversion efficiency of up to 13.9% with small hysteretic behavior of current–voltage curves was achieved under AM 1.5 illumination (100 mW cm−2). The ZnO-based devices exhibited significantly improved durability as compared to the control device with exposure to the ambient air environment.
Letter
Editor’s Choice
Letter
Editor’s Choice
  • Koichi Ohno, Hiroko Satoh, Takeaki Iwamoto
    2015 Volume 44 Issue 5 Pages 712-714
    Published: May 05, 2015
    Released: May 05, 2015
    [Advance publication] Released: March 06, 2015
    JOURNALS OPEN ACCESS
    A new carbon family with a prism structure has been found by quantum chemical calculations. The prism-C20 has a D10h structure with double-layered decagonal rings connected each other by ten vertical CC bonds. The CC bond lengths are 0.144 nm on the decagonal rings and 0.148 nm on the side faces. The diameter of the ring is 0.465 nm. The prism-C20 is expected to be stable, since the lowest energy barrier from it was estimated to be 158.0 kJ mol−1.
Letter
feedback
Top