Browse > Article

Preparation and Mesomorphic Properties of tetramethylene-1,4-bis (p-oxybenzylidene p-substituted aniline)  

Choi, Ok-Byung (College of Natural Science, Hoseo University)
Park, Joo-Hoon (College of Natural Science, Hoseo University)
Lee, Yong-Seop (College of Natural Science, Hoseo University)
Lee, Whan-Myung (College of Natural Science, Hoseo University)
Kim, Ki-Hwan (College of Natural Science, Hoseo University)
Lee, Eun-Kyoung (College of Natural Science, Hoseo University)
Ko, Kyung-Kon (College of Natural Science, Hoseo University)
Lee, Eun-Sang (College of Natural Science, Hoseo University)
So, Bong-Keun (College of Natural Science, Hannam University)
Lee, Chang-Joon (College of Natural Science, Hannam University)
Lee, Soo-Min (College of Natural Science, Hannam University)
Publication Information
Korean Chemical Engineering Research / v.45, no.2, 2007 , pp. 155-159 More about this Journal
Abstract
A series of new dimesogenic compounds having two identical, terminal Schiff base type mesogens and a central tetramethylene spacer were synthesized. Their thermotropic and mesomorphic properties of the compounds were investigated by differential scanning calorimetry and polarizing microscopy. The compounds with X= -F, -Cl, -Br, -CN and $-OCH_3$ were enantiotropically nematic liquid crystal. In contrast, the compounds with X= -I and $-CF_3$ were non-liquid crystal. The nematic forming efficiency of the groups was in the order of -CN > $-OCH_3$ > -Br > -Cl > -F.
Keywords
Liquid Crystalline Compounds; Dimesogenic Liquid Crystals; Non-Conventional Liquid Crystals;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
1 Jin, J.-I., 'Liquid Crystalline Behavior of Novel Dimesogenic Compounds,' Mol. Cryst. Liq. Cryst., 267, 249-265(1995)   DOI
2 Jin, J.-I and Park, J.-H., 'Main Chain Thermotropic Copolyesters Containing Imino Group Linked Mesogenic Units and Polymethylene Spacers,' Eur. Polym. J., 23(12), 973-977(1987)   DOI   ScienceOn
3 Donahoe, H. B., Benjamin, L. E., Fennoy, L. V. and Greiff, D., 'Synthesis of Potential Rickettsiostatic Agents.I.4,4'-Dicarboxy- $\alpha, \omega$-diphenoxyalkanes,' J. Org. Chem., 26, 474-475(1961)   DOI
4 Park, J.-H., Choi, O.-B., Shin, J.-C., Kang, K.-M., Kim, K.-H., Lee, C.-J., So, B.-K. and Lee, S.-M., 'Effect of Molecular Structure on Liquid Crystalline Properties(1); 1,10-Bis(p-2-,3-,4-halogenophenoxycarbonyl) phenoxydecane,' J. Kor. Chem, Soc., 48(3), 322-326(2004)   DOI
5 Demus, D., Textures of Liquid Crystals, Verlag Chemie, N.Y.(1978)
6 Gray, G. W., Winsor, P. A., Eds. Liquid Crystals and Plastic Crystals, John wiley and Sons Inc, London, Vol.1.1. 115-125(1974)
7 Park, J.-H., Choi, O.-B., Lee, J.-S., Kang, K.-M., Shin, J.-C., Kim, K.-H., Kim, H.-J., Lee, C. J., So, B.-K. and Lee, S.-M., 'Liquid Cristalline Properties of Schiff Base Mono-and Dimesogenic Compounds,' Kor. Chem. Eng.Res., 43(1), 176-180(2005)
8 Dehne, H., Roger, A., Demus, D., Diele, S., Kresse, H., Pelzl, G. and Wedeler, W., 'Sulphur Ligated Siamese Twin Mesogens,' Liq. Cryst., 6, 47-62(1989)   DOI
9 Collings, P. J., Liquid Crystals, Princeton University Press, Princeton and Oxford (2002)
10 Yoon, S. H., 'Organic Material for LCD Components,' Poly. Scie. Tech., 15(6), 674-682(2004)
11 Jin, J.-I. and Park, J.-H., 'Thermotropic Compounds with Two Terminal Mesogenic Units and a Central Spacer. 5. Homologous Series of Polymethylene-${\alpha},\;{\omega}$-Bis(p-oxybenzylidene Aniline),' Mol. Cryst. Liq. Cryst., 110, 293-308(1984)   DOI
12 Demus, D., Goodby, J., Gray, G. W., Spiess, H.-W. and vill, V., Handbook of Liquid Crystals, Wiley-VCH, Weinhem, Vol.1. (1998)
13 Jin, J.-I., Kang, J.-S., Jo, B.-W. and Lenz, R.W., 'Synthesis and Properties of Thermotropic Compounds with Two Terminal Mesogenic Units and a Central Spacer III. Homologous Series of $\alpha, \omega$-Bis[4-(p-nitrobenzoyloxy)phenoxy]alkanes,' Bull. Kor. Chem. Soc., 4(4), 176-180(1983)
14 Jin, J.-I., 'Liquid Crystalline Behavior of Novel Dimesogenic Compound,' Mol. Cryst. Liq. Cryst., 267, 249-269(1995)   DOI
15 Demus, D. and Zaschke, H., Flussige Kristalle in Tabellen II, VEB Deutscher Verlag fur Grundstoffindustire, Leipzig (1984)
16 Park, J.-H., Lee, H.-M., Choi, O.-B., Lee, Y.-S., Ko, K.-K., Lee, E.-S., Song, J.-H., Kim, K.-W., Lee, E.-K., Lee, C.-J., So, B.-K. and Lee, S.-M., 'H-Shaped Dimesogenic Compounds; Synthesis and Thermotropic Properties of $\alpha, \omega$-Bis[2,5-bis(4-cyanophenoxycarbonyl) phenoxy]alkanes,' J. Kor. Chem. Soc., 50(3), 263-268(2006)   DOI