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Citation: MO Lingchao, LIANG Xiaoqin, AN Zhongwei, CHEN Xinbing, CHEN Pei. Synthesis and Properties of Lateral Multi-fluorine Substituted Internal Alkynes Liquid Crystals[J]. Chinese Journal of Applied Chemistry, ;2013, 30(8): 861-866. doi: 10.3724/SP.J.1095.2013.20446 shu

Synthesis and Properties of Lateral Multi-fluorine Substituted Internal Alkynes Liquid Crystals

a. Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Materials Science and Engineering, Shanxi Normal University, Xi'an 710100, China;
b. Xi'an Modern Chemistry Research Institute, Xi'an 710065, China

Received Date: 4 October 2012
Revised Date: 13 November 2012

Sixteen lateral multi-fluorine substituted internal alkynes liquid crystals were synthesized via a series of reactions including substituted phenylboronic acidation,Suzuki cross-coupling,Sonogashira crosscoupling and iodination using 4-bromo-alkylbenzene and 4-bromo-2,3-difluoro-phenol precursors. The structures of the products were characterized by means of IR,NMR and MS. The differential scanning calorimetric,polarizing microscope and Abbe refractometer,were used to investigate their properties.The results demonstrate that the compounds possess low melting point,wide phase transition interval and high optical anisotropy value(△n > 0.3). The obtained liquid crystals might find broad potential applications in dual-frequency liquid crystals.
- lateral multi-fluorine substitution,
- internal alkynes,
- dual-frequency liquid crystals
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