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Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received August 3, 2006
Accepted November 8, 2006

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Tetramethylene-1,4-bis(p-oxybenzylidene p-substituted aniline)의 합성과 액정성

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

최옥병 박주훈^† 이용섭 이환명 김기환 이은경 고경곤 이은상 소봉근¹ 이창준¹ 이수민¹

Ok-Byung Choi Joo-Hoon Park^† Yong-Seop Lee Whan-Myung Lee Ki-Hwan Kim Eun-Kyoung Lee Kyung-Kon Ko Eun-Sang Lee Bong-Keun So¹ Chang-Joon Lee¹ Soo-Min Lee¹

호서대학교 자연과학대학, 336-795 충남 아산시 배방면 세출리 165 ¹한남대학교 자연과학대학, 306-791 대전시 대덕구 오정동 133

College of Natural Science, Hoseo University, 165, Sechul-ri, Baebang-myun, Asan, Chungnam 336-795, Korea ¹College of Natural Science, Hannam University, 133, Ojeong-dong, Daedeok-gu, Daejeon 306-791, Korea

jhpark@office.hoseo.ac.kr

Korean Chemical Engineering Research, April 2007, 45(2), 155-159(5), NONE Epub 7 May 2007

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Abstract

말단에 두 개의 동일한 schiff base 메소젠과 중앙에 테트라메틸렌 유연격자를 갖는 새로운 이메소제닉 화합물을 합성하였다. 이들의 열적성질 및 액정성은 시차주사열분석기와 가열판이 부착된 편광현미경을 사용하여 조사하였다. X= -F, -Cl, -Br, -CN 및 -OCH3 화합물은 양방성 네마틱 액정이었으며, 이에 반하여 X= -I와 -CF3 화합물은 액정상을 형성하지 못하였다. 이 화합물들의 네마틱 그룹 효율은 -CN > -OCH3 > -Br > -Cl > -F 순서이었다.

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 -OCH3 were enantiotropically nematic liquid crystal. In contrast, the compounds with X= -I and -CF3 were non-liquid crystal. The nematic forming efficiency of the groups was in the order of -CN > -OCH3 > -Br > -Cl > -F.

Keywords

Liquid Crystalline Compounds Dimesogenic Liquid Crystals Non-Conventional Liquid Crystals

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