引用本文:
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
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

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

Monotropic smectic A to double layer smectic C transition of biphenyl containing liquid crystal acetylene
摘要:
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.
English
Monotropic smectic A to double layer smectic C transition of biphenyl containing liquid crystal acetylene
Abstract:
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.
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Key words:
- Liquid crystal
- / Phase structure
- / Phase transition
- / Smectic phase
- / X-ray diffraction

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