期刊論文
| 學年 | 101 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2012-11-26 |
| 作品名稱 | Induction of the Columnar Phase of Unconventional Dendrimers by Breaking the C2 Symmetry of Molecules |
| 作品名稱（其他語言） | |
| 著者 | Lai, Long-Li; Wang, Sheng-Wei; Cheng, Kung-Lung; Lee, Jey-Jau; Wang, Tsai-Hui; Hsu, Hsiu-Fu |
| 單位 | 淡江大學化學學系 |
| 出版者 | Weinheim: Wiley - V C H Verlag GmbH & Co. KGaA |
| 著錄名稱、卷期、頁數 | Chemistry - A European Journal 18(48), pp.15361-15367 |
| 摘要 | Two triazine-based unconventional dendrimers were prepared and characterized by 1H and 13C NMR spectroscopy, mass spectrometry, and elemental analysis. Differential scanning calorimetry, polarizing microscopy, and powder XRD studies showed that these dendrimers display columnar liquid-crystalline phases during thermal treatment. This is ascribable to breaking of their C2 symmetry. The molecular conformations of prepared dendrimers were obtained by computer simulation with the MM3 model of the CaChe program in the gas phase. The simulation showed that the conformations of the prepared dendrimers are rather flat and disfavor formation of the LC phase. However, due to C2-symmetry breaking, the prepared dendrimers have structural isomers in the solid state and thus show the desired columnar phases. This new strategy should be applicable to other types of unconventional dendrimers with rigid frameworks. |
| 關鍵字 | dendrimers;liquid crystals;nitrogen heterocycles;symmetry breaking |
| 語言 | en_US |
| ISSN | 1521-3765 0947-6539 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | Lai, Long-Li |
| 審稿制度 | 是 |
| 國別 | DEU |
| 公開徵稿 | |
| 出版型式 | 電子版 紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/80009 ) |