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Citation: LIU Ping, ZHOU Xiao-Ping, XU Yun-Hua, HU Jian-Hua, ZHAO Qi-Zhong, TONG Zhen, DENG Wen-Ji. Synthesis of Terthiophene Derivatives and Their Liquid Crystal Properties[J]. Chinese Journal of Applied Chemistry, ;2004, 21(8): 797-800. shu

Synthesis of Terthiophene Derivatives and Their Liquid Crystal Properties

1.
a Research Institute of Materials Science, South China University of Science and Technology, Guangzhou 510640;
2.
b Department of Applied Physics, South China University of Science and Technology, Guangzhou 510640

Corresponding author: LIU Ping,
Received Date: 26 September 2003
Available Online: 10 December 2003
Fund Project: 教育部留学回国人员科研启动基金、科技部基础研究重大项目前期研究专项(2001CCA03500) (2001CCA03500)

Two terthiophene derivatives containing an alkylamide group, N,N'-dialkyl-5,5"-dichloro-2,2':5',2"-terthiophene-4,4"-dicarboxamide(DNC_nDI3T,n=8,18) and N,N'-dialkyl-5,5"-diiodo-2,2':5',2"-terthiophene-4,4"-dicarboxamide(DNC_nDI3T,n=8,18) were synthesized, their thermal behavior were examined. Polarized light microscopy and differential scanning calorimetry reveal DNC₁₈Dl3T and DNC₁₈DI3T exhibit smectic A phase, whereas DNC₈Dl3T and DNC₈DI3T do not form liquid crystal phase. It indicated that the alkyl chain length shows great effects on the liquid crystal phase formation.
- terthiophene,
- liquid crystal,
- smectic A phase
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