臺灣博碩士論文加值系統

本文實驗合成一系列吡啶基分子與羧酸基分子，利用H1-NMR
EA作為結構鑑定。再藉由氫鍵鍵結形成彎曲狀超分子，並以POM
電性量測探討其液晶行為。
我們成功的以吡啶基分子與羧酸基分子形成超分子得到向列相(N)，並導入F官能基於羧酸基分子後，影響其超分子的液晶像溫度範圍。再將其掌性結構導入羧酸基分子中，使N相轉變為N*相。
接著，我們將吡啶基分子與含掌性結構且有F官能基羧酸基分子以不同的莫爾百分比混摻，在羧酸基分子過量的情形下，可因自身氫鍵而鍵結成棒狀的結構。在C9IIIPy-A2F*與C7IIIPy-A2F*的系列中，成功觀察到了BPI/II的藍相結構，在C9IIIPy-A2F*的羧酸基分子佔其莫爾百分比60% ~ 80%可以觀察到藍相，其中以70%具有較長的藍相，約8℃的溫度範圍。在C7IIIPy-A2F*的羧酸基分子佔其莫爾百分比60% ~ 70%時亦可觀察到藍相，其中以60%具有較長的藍相，約7℃的溫度範圍。

We synthesized a series of pyridine-based molecules and carboxylic acid molecules. The chemical structures of these compounds were characterized by H1-NMR and EA. They consisted of hydrogen bonding supramolecular diad mixtures. The liquid crystalline phases and mesomorphic behavior of all compounds were identified from the results of POM and Electro-optical measurement.
Pyridyl molecules connected to a simple carboxylic acid molecule by a hydrogen bond have a nematic phase. The F functional group in carboxylic acid-based molecules affects their supramolecular liquid crystal temperature range. As the carboxylic acid molecules have chiral structure, the nematic phase switches to the chiral nematic phase.
Next, we mixed pyridine-based molecules with carboxylic acid molecules with chiral structures and F functional groups in different molar percentage blends. In the case of excess carboxylic acid molecules, the carboxylic acid molecules will form a rod-like structure with another via a hydrogen bond. This series of C9IIIPy-A2F * and C7IIIPy-A2F * have blue phase (BPI /II). The series of C9IIIPy-A2F * have blue phase when carboxylic acid molecules are 60 mol% to 80 mol%. The blue phase temperature range is about 8℃. The series of C7IIIPy-A2F * also have blue phase when carboxylic acid molecules are 60 mol% to 70 mol%. The blue phase temperature range is about 7℃.

目錄
誌謝............................................................................................................I
摘要..........................................................................................................II
Abstract…………………………………………………………………III
目錄……………………………………………………………………...V
圖目錄……………………………………………………………...…VIII
表目錄……………………………………………………………..…XIII
第一章 緒論…………………………………………………………..…1
1-1 前言……………………………………………………....2
1-2 液晶簡介…………………………………………………3
1-2-1液晶的發現……………………………………...…3
1-2-2 液晶的分類…………………………………….....5
1-2-3 液晶的性質……………………………………….8
1-2-4液晶相的鑑定方法…………………………….…10
1-3 鐵電型液晶………………………………..…………….13
1-3-1 鐵電性………………………………………….13
1-3-2 鐵電型液晶………………………………….…14
1-3-3 反鐵電型液晶……………………………….…...15
1-4 香蕉型液晶……………………………………………...17
1-4-1香蕉型液晶簡介………………………………….17
1-4-2 香蕉型液晶分子設計……………………...……19
1-5 超分子液晶………………………………………………20
1-5-1超分子氫鍵型液晶………………………………..20
1-5-2氫鍵彎曲狀液晶分子…………………………..…21
1-6藍相液晶…………………………………………………..23
1-6-1 藍相液晶的歷史……………………………….....23
1-6-2 藍相液晶的介……………………………...……..24
1-6-3 藍相液晶分子設計……………………………….27
1-6-4 T型藍相液晶分子……………………………….27
1-6-5 聯萘藍相液晶分子……………………………….28
1-6-6 彎曲型藍相液晶………………………………….28
1-6-7 超分子藍相液晶分子…………………………….31
1-7 研究動機與方向………………………………………….31
第二章 實驗部分………………………………………………………36
2-1 實驗藥品………………………………………………….37
2-2 實驗儀器………………………………………………….39
2-3 合成流程……………………………………………….…42
2-4 合成步驟………………………………………………….50
第三章 結果與討論……………………………………………………83
3-1吡啶基與羧酸基結構之超分子彎曲狀液晶……………..84
3-2 超分子液晶相POM觀察之探討…………………………..86
3-3 超分子藍相液晶POM之探討……………………………...94
3-3-1 旋光分子混摻…………………………………….94
3-3-2 超分子C9IIIPy-A2F*藍相之探討………………..97
3-3-3超分子C7IIIPy-A2F*藍相之探討…………………99
3-3-4超分子C9IIIPy-A2F*藍相液晶之電性量測…….100
3-4 結論……………………………………………………...104
3-5 未來展望………………………………………………...105
參考文獻………………………………………………………………106
附錄……………………………………………………………………109

參考文獻
[1] F. Reinitzer, Monatshefte für Chemie, 1888, 9, 421; Ann. Physik., 1908, 27, 213.
[2] O. Lehmann, Z. physik. Chem., 1889, 4, 462；Ann. Physik., 1908, 25, 852.
[3] D.Vorländer,ChemischeKristallographie.der.Flüssigleiten,Akademische Verlagsgesellschaft, Leipzig, 1924.
[4] S. Kumar, Liquid crystals: experimental study of physical properties and phase transitions, New York, 2001, p.49.
[5] N.Gimeno ; M. B. Ros; J. L.Serrano, Chem. Mater., 2008, 20, 1262.
[6] R. B. Meyer, L. Strzelecki and P. Keller, J. Phys. (Fr.) Lett., 1975, 36, L 69
[7] N. A. Clark and S. T. Lagerwall, Appl. Phys. Lett. 1980, 36, 899
[8] A. D. L. Chandani, T. Hagiwara, Y. Suzuki, Y. Ouchi, H. Takezoe and A. Fukuda, Jpn. J. Appl. Phys, 1988, 27, L 729
[9] T. Niori, F. Sekine, J. Watanabe, T. Furukawa and H. Takezoe, J. Mater. Chem., 1996, 6, 1231; T. Niori, F. Sekine, J. Watanabe, T. Furukawa and H. Takezoe, Mol. Cryst. Liq. Cryst., 1997, 301, 337; F. Sekine, Y. Takanashi, T. Niori, J. Watanabe and H. Takezoe, Jpn. J. Appl. Phys., 1997, 36, 1201.
[10] R. A.Reddy, C. Tschierske. J. Mater. Chem., 2006, 16, 907.
[11] C.V. Yelamaggad, I.S. Shashikala, G. Liao, D.S.S. Rao, S.K. Prasad, Q. Li, A. Jakli, Chem. Mater., 2006, 18, 6100.
[12] T. Kato, J M J. Frechet. J. Am. Chem. Soc., 1989, 111, 8533.
[13] T. Kato, Structure &Bonding, 96; Berlin :Springer2 Verlag, 2000, 85
[14] A. Blumstein, S. B. Clough, L. Patel, Macromolecules, 1989, 111, 243.
[15] T. Kato and J. Frechet, Macromolecules, 1989, 22, 3818.
[16] L. Y. Wang, I. H. Chiang, P. J. Yang, W. S. Li, I. T. Chao, H. C. Lin, J. Phys. Chem. B, 2009, 113, 14648.
[17] W. H. Chen, W. T. Chuang, U. S. Jeng, H. S. Sheu, H. C. Lin, J. Am. Chem. Soc., 20011, 133, 15674.
[18] Reinitzer F.Monatsh.Chem.,1888,421
[19] Atsushi Yoshizawa, J. Mater. Chem., 2005, 15, 3285.
[20] Atsushi Yoshizawa, Liq. Cryst., 2007, 34, 1039.
[21] A. D. L. Chandani, T. Hagiwara, Y. Suzuki, Y. Ouchi, H. Takezoe and A. Fukuda, Jpn. J. Appl. Phys., 1988, 27, 729.
[22] J. Rokunohe, A. Yoshizawa, J. Mater. Chem., 2005, 15, 275-279.
[23] A. Yoshizawa, Y. Kogawa, K. Kobayashi, Y. Takanishi, J. Yamamoto, J. Mater. Chem., 2009,19, 5759.
[24] M .Nakata ,Y. Takanishi , J.Watanabe , Takezoe H. Phys. Rev. E, 2003,68
[25] S.Taushanoff , K. V. Le, J. Williams , R. J. Twieg, B. K. Sadashiva , H.Takezoe, A.Jákli ,J. Mater. Chem, 2010, 20, 5893
[26] K. V. Le, S. Aya, Y. Sasaki , H. Choi, F. Araoka F, K. Ema, J. Mieezkowski, A. Jakli, K. Ishikawa, H. Takezoe, J. Mater. Chem, 2011, 21, 2855
[27] M. Lee, S.T. Hur, H. Higuchi, K. Song, S. W. Choi, H. Kikuchi, J. Mater. Chem. , 2010, 20,5813
[28] W. He, G. Pan, Z. Yang, D. Zhao, G. Niu, W. Huang, X. Yuan, J. Guo, H. Cao, H. Yang, Adv. Mater., 2009, 21, 2050.