In Situ Synthesis of Hexakis(alkoxy)diquinoxalino[2,3-a:2‘,3‘-c]phenazines:  Mesogenic Phase Transition of the Electron-Deficient Discotic Compounds
學年 92
學期 2
出版（發表）日期 2004-04-30
作品名稱 In Situ Synthesis of Hexakis(alkoxy)diquinoxalino[2,3-a:2‘,3‘-c]phenazines:  Mesogenic Phase Transition of the Electron-Deficient Discotic Compounds
作品名稱（其他語言）
著者 徐秀福; Hsu, Hsiu-fu
單位 淡江大學化學學系
出版者 American Chemical Society
著錄名稱、卷期、頁數 Journal of Organic Chemistry 69(9), pp.3181-3185
摘要 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.
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語言 en
ISSN 0022-3263
期刊性質 國內
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審稿制度 否
國別 TWN
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