Citation: Zhen Qiang Yu, Cai Zhen Zhu, Zhe Zhang, Jian Hong Liu, Jacky W. Y. Lam, Ben Zhong Tang. Monotropic smectic A to double layer smectic C transition of biphenyl containing liquid crystal acetylene[J]. Chinese Chemical Letters, ;2011, 22(11): 1355-1358. doi: 10.1016/j.cclet.2011.06.013 shu

Monotropic smectic A to double layer smectic C transition of biphenyl containing liquid crystal acetylene

a Shenzhen Key Laboratory of Functional Polymers and School of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, China;
b Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, China

Received Date: 31 March 2011

Fund Project: The author (Z.Q.Yu) would like to thank the financial supports of National Natural Science Foundation of China (No.21074073) and Shenzhen Key Laboratory of Functional Polymers (No.FP20100011).

5-[(4'-Heptoxy-4-biphenylyl)carbonyloxy]-l-pentyne (A-3, 7) was synthesized and the phase structures and transitions were investigated by differential scanning calorimetry (DSC), wide angle X-ray diffraction (WAXD), polarized light microscopy (PLM) and the molecular packing in the crystal and liquid crystalline phases were simulated by molecular dynamic simulation. The results showed that the sample formed thermodynamically metastable SmA and SmC₂ phases before crystallized during cooling and the crystal phase directly transformed into isotropic phase during heating.
- Liquid crystal,
- Phase structure,
- Phase transition,
- Smectic phase,
- X-ray diffraction
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