教師資料查詢 | 類別: 期刊論文 | 教師: 徐秀福 Hsiu-fu Hsu (瀏覽個人網頁)

標題: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
語言英文
ISSN2050-7534
期刊性質國外
收錄於SCI;
產學合作
通訊作者
審稿制度
國別英國
公開徵稿
出版型式,電子版
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