Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
ISSN-L : 0366-7022
Volume 41 , Issue 9
Showing 1-50 articles out of 65 articles from the selected issue
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  • Yasuhiro Morisaki, Yoshiki Chujo
    2012 Volume 41 Issue 9 Pages 840-846
    Published: September 05, 2012
    Released: August 25, 2012
    JOURNALS OPEN ACCESS
    Incorporation of a [2.2]paracyclophane skeleton into a conjugated polymer main chain affords a polymer comprising stacked π-electron systems. In this article, we describe the synthesis and optical properties of some [2.2]paracyclophane-based polymers on the basis of the results of our resent research. We discuss the role of [2.2]paracyclophane in the polymer backbone, through-space conjugation of the polymer, and the feasibility of using the titled polymers as single molecular wires that allow for unidirectional energy and charge transfer via through-space interactions.
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  • Yidong Zhang, Liwei Mi
    2012 Volume 41 Issue 9 Pages 915-916
    Published: September 05, 2012
    Released: August 25, 2012
    JOURNALS OPEN ACCESS
    A superhydrophobic ZnS film was successfully fabricated by a simple solvothermal method using Zn foil and S powder as raw materials in an absolute ethanol solution at 160 °C for 8 h. The products were characterized by X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and contact angle (CA) measurements. The results show that the obtained ZnS film was hexagonal phase, composed of many dense and uniform interconnected nanoflakes of average thickness ca. 120 nm. A possible reaction mechanism was proposed and discussed. It was found that the ZnS film exhibits superhydrophobicity owing to its special nanoflake structure.
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  • Sanmitra Barman, Smita Patil, Christopher J. Levy
    2012 Volume 41 Issue 9 Pages 974-975
    Published: September 05, 2012
    Released: September 08, 2012
    JOURNALS RESTRICTED ACCESS
    A new helix-directing salan ligand (R,R)-2 with the (1R,2R)-diaminocyclohexyl backbone and benz[a]anthryl sidearms was synthesized by borohydride reduction of the corresponding salen ligand. Formylation and reduction of (R,R)-2 yielded the N-Me counterpart, (R,R)-3. Complexation of these flexible ligands to TiCl4 produced the [TiCl2(salan)] complexes (R,R)-4 and (R,R)-5, which were characterized by NMR, IR, and HRMS techniques. The complexes were tested as catalysts for the asymmetric sulfoxidation of thioanisole with cumene hydroperoxide and hydrogen peroxide as the oxidants. Modest selectivity was observed, with the N-H salan complex showing somewhat better chiral induction.
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