Both increasing the Iso-to-Col transition and lowering the solidifying temperatures of a triazine-based dendrimer by introducing CN polar groups in the dendritic core
學年 108
學期 1
出版（發表）日期 2019-10-20
作品名稱 Both increasing the Iso-to-Col transition and lowering the solidifying temperatures of a triazine-based dendrimer by introducing CN polar groups in the dendritic core
作品名稱（其他語言）
著者 Cheng-Hua Lee; Chun-Chi Huang; Chia-Ying Li; Long-Li Lai; Jey-Jau Lee; Hsiu-Fu Hsu
單位
出版者
著錄名稱、卷期、頁數 Journal of Materials Chemistry C 7(45), p.14232-14238
摘要 Two new triazine-based dendrimers 1a and 1b, containing –NY(CH2)3NY– linkers between two G3 dendrons (1a: Y = Bz, 1b: Y = 4-cyanoBz; Bz = benzyl), were successfully prepared in ∼32 and ∼34% yields, respectively. Compared with dendrimer 1c that contains –NH(CH2)3NH– linkers between two G3 dendrons, dendrimer 1a exhibits a similar mesogenic range to 1c, but 1b possesses a broader mesophase-temperature range than 1c. Surprisingly, dendrimer 1b not only increases the isotropic-phase-to-columnar-mesophase (Iso-to-Col) transition temperature but also lowers the solidifying temperature on cooling. It is believed that the CN groups in the dendritic linker of 1b increase both the molecular interaction between dendrimers, leading to its increasing Iso-to-Col transition temperature, and dendritic distances within columns, leading to its decreasing solidifying temperature.
關鍵字
語言 en
ISSN 2050-7534
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 否
國別 GBR
公開徵稿
出版型式 ,電子版
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