| 摘要: | 本篇論文主要分成兩個部分：以3-hydroxy-3-(naphthalen-2-yl) acrylaldehyde作主體，延伸出化合物2及4a-4c，分別為系列一、二之配位基，再和金屬反應生成錯合物1及3a-3c為第一個部分；第二個部分探討的是含triketone的有機液晶分子的特性。 系列一為對稱的萘環結構，配位基2 (n= 6, 8, 12, 16)及銅錯合物1 (n= 8, 12, 16) 均具有Colh液晶相；系列二為不對稱的萘環和苯環結構，減少中心硬端的比例，並改變側鏈基支數和推拉電子的能力，使液晶行為更加穩定，呈現的液晶相種類亦為Colh液晶相。並透過理論計算推測盤狀堆疊的情形，再配合MASS及IR，證實錯合物為雙金屬配位。 系列三在設計分子時，除側鏈基碳數(n= 8, 10, 12, 14, 16)的不同，並藉由增加-OH官能基改變amine的結構，進而和文獻結構比較探討氫鍵作用力對分子排列的影響。其中化合物5a (n= 14, 16)為SmC液晶相；而系列5b 則有廣泛的SmA液晶相。 以上系列皆利用NMR、EA等儀器分析鑑定結構及純度；而液晶性質則使用POM、DSC及變溫XRD進行探討。 This report is divided into two parts: the first, series I, II respectively the ligands 2, 4a-4c, and their complexes 1, 3a-3c. Synthesis, characterization and mesomorphic properties of new mesogenic derivatives based on 3-hydroxy-3-(naphthalen-2-yl) acrylaldehyde. The second part is the organic liquid crystal based on triketone. All organic derivatives were characterized by 1H-NMR and 13C-NMR spectroscopy and elemental analysis.Their physical properties were characterized by optical microscopy, differential scanning calorimetry, and temperature-dependent powder X-ray diffraction measurements. In series I, ligands 2 (n = 1, 4, 8, 12, 16) and complexes 1 (n = 8, 12, 16) were exhibited Colh phase, and series II has more stable mesomorphic properties, is also exhibited Colh phase. Arrange through theoretical evaluation, with the MASS and IR, to proved Cu2+ ion formed binuclear complexes. Finally, in series III, we changes of alkoxy chain and increase the-OH functional group of amine, to contrast with literature. Ligands 5a (n = 14, 16) exhibited SmC phase and 5b (n = 8, 10, 12, 14, 16) exhibited SmA phase. |
