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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/25013

    Title: In Situ Synthesis of Hexakis(alkoxy)diquinoxalino[2,3-a:2‘,3‘-c]phenazines:  Mesogenic Phase Transition of the Electron-Deficient Discotic Compounds
    Authors: 徐秀福;Hsu, Hsiu-fu
    Contributors: 淡江大學化學學系
    Date: 2004-04-30
    Issue Date: 2009-12-01
    Publisher: American Chemical Society
    Abstract: 2,3,8,9,14,15-Hexakis(alkoxy)diquinoxalino[2,3-a:2‘,3‘-c]phenazines with alkyl side chains varying from 6 to 12 carbon atoms were readily synthesized by the condensation of hexaketocyclohexane with the respective 1,2-bisalkoxy-4,5-diaminobenzene. Polarization microscopy and DSC studies showed all these compounds to exhibit a very wide mesophase range of over 150 °C. An interesting Dhd to Drd transition was observed for the octyl derivative 3b, as determined by X-ray diffraction measurements. The hexyl derivative showed three reduction potentials, suggesting that the HATN core maintained its electron-deficient characteristic and considered suitable as an n-doped discotic-liquid crystalline material. Incorporation of six alkoxy chains did not override the electron deficiency of the HATN core.
    Relation: Journal of Organic Chemistry 69(9), pp.3181-3185
    DOI: 10.1021/jo035840l
    Appears in Collections:[Graduate Institute & Department of Chemistry] Journal Article

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