Star-Shaped Mesogens of Triazine-Based Dendrons and Dendrimers as Unconventional Columnar Liquid Crystals
學年 96
學期 1
出版（發表）日期 2008-01-18
作品名稱 Star-Shaped Mesogens of Triazine-Based Dendrons and Dendrimers as Unconventional Columnar Liquid Crystals
作品名稱（其他語言）
著者 徐秀福; Hsu, Hsiu-fu; Lai, Long-li ; Lee, Cheng-hua; Wang, Ling-yung; Cheng, Kung-lung
單位 淡江大學化學學系
出版者 Washington: American Chemical Society
著錄名稱、卷期、頁數 Journal of Organic Chemistry 73(2), pp.485-490
摘要 [GRAPHICS] Dendrons G(n)-Cl and G(n)-NH (n = 2-4) and novel dendrimers G(n)-N similar to N-G(n) (n = 2-4) based on triazine and piperazine units were efficiently prepared in good yields without employing the protection and deprotection processes and are fully characterized by H-1 NMR and C-13 NMR spectroscopies, elemental analysis, and mass spectroscopy. These compounds are transparent and possess good thermal stability. G(4)-Cl shows a monotropic columnar phase in a narrow range with a coexisting crystalline phase. Dendron G(4)-NH shows a rectangular column-phase, and dendrimer G(4)-N similar to N-G(4) exhibits a monotropic hexagonal columnar phase. These identifications were supported by the polarizing optical scope and powder XRD studies.
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語言 en
ISSN 0022-3263
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產學合作
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國別 USA
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