【摘要】：通過收斂法合成了母核為亞胺鍵連接的芳環(huán)與氟代芳環(huán),外圍為3,4,5-三(正十二烷氧基)苯基亞甲基的第一代樹枝狀亞胺分子,并對其熱致液晶行為和聚集體結構進行了研究.示差掃描量熱和熱臺偏光光學顯微鏡研究表明該亞胺分子在93?C到118?C的溫度范圍內為具有雙折射的液晶相.X-射線衍射結果表明該亞胺分子的液晶相為斜柱狀結構(a=4.90 nm,b=3.51 nm,γ=110?).芳環(huán)-氟代芳環(huán)的面對面交替堆積和氫鍵驅動亞胺分子形成了柱狀聚集體,分子外圍的柔性十二烷氧基鏈的無序伸展,與母核聚集體發(fā)生微相分離,促使了亞胺分子斜柱狀液晶相的形成.
[Abstract]:The first generation dendritic imine molecules with an imine bond of the mother nucleus and a fluoroaromatic ring with a periphery of 3 ~ 4N ~ 5- tris (n-dodecyloxy) phenyl methylene were synthesized by convergence method. The thermotropic liquid crystal behavior and the aggregate structure of the dendrimers were also studied. The results of differential scanning calorimetry and polarizing optical microscopy show that the imine molecule is a birefringent liquid crystal phase with birefringence in the temperature range from 93C to 118C. The results show that the liquid crystal phase of the imine molecule is an oblique columnar structure (a4.90 nmBN 3.51 nm, 緯 110?). The face to face stacking of aromatic ring and fluoroaromatic ring and the hydrogen bond drive the imine molecules to form columnar aggregates. The flexible dodecoxyl chains around the molecules spread out disorderly and separated from the parent nuclear aggregates. The formation of the liquid crystal phase of imine molecule is inclined columnar.
【作者單位】： 北京大學化學與分子工程學院;
【基金】：國家自然科學基金(基金號21074004)資助項目
【分類號】：O641.3;O753.2

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本文編號：2152700