Synthesis and Properties of Fluorinated Isothiocyanate Phenyl-Tolane Liquid Crystal Compounds

Zeng-hui, 彭增辉 Peng; Li-shuang, 姚丽双 Yao; Quanquan, 穆全全 Mu; Jing-li, 赵晶丽 Zhao; Yonggang, 刘永刚 Liu; Da-yu, 李大禹 Li; Dong-mei, 闫冬梅 Yan

doi:10.3788/yjyxs20132804.0479

Cited by 3 publications

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“…The liquid crystals containing NCS group have higher birefringence, higher resistivity and lower viscosity than the liquid crystals containing CN group, which has become the focus of research and development. Since 2000, many NCSbased liquid crystal compounds and their mixtures have been reported [6][7][8][9][10][11][12][13][14][15][16][17][18]. However, currently known NCS liquid crystals have some defects, including high viscosity and narrow operating temperature range.…”

Section: Introductionmentioning

confidence: 99%

P‐12.12: Development and Application of High Birefringence Liquid Crystal Materials

Li¹,

Li²,

Hu³

et al. 2023

Symp Digest of Tech Papers

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The development of new liquid crystal optoelectronic devices, including laser phase modulation, microwave and terahertz devices, requires liquid crystal materials with high birefringence. In this paper, three new molecular design strategies are proposed, including the introduction of olefin chain, lateral fluorine substitution and new ring core. Four new series of isothiocyanate liquid crystal compounds with high birefringence, low melting point and wide nematic temperature range were synthesized. Based on these new liquid crystal compounds, a liquid crystal mixture with nematic temperature range of ‐40~146 ºC and birefringence of 0.42 was developed. At 19 GHz, the new liquid crystal mixture shows excellent dielectric properties, with dielectric anisotropy of 1.28 and dielectric loss of 0.0087. The new liquid crystal mixture also has very low viscoelastic coefficient. The results at 1550nm and 60 ºC show that the response speed can reach 3.6 milliseconds with 2π phase modulation in the reflection mode.

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Section: Introductionmentioning

confidence: 99%

P‐12.12: Development and Application of High Birefringence Liquid Crystal Materials

Li¹,

Li²,

Hu³

et al. 2023

Symp Digest of Tech Papers

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Electrooptical properties of new type fluorinated phenyl-tolane isothiocyanate liquid crystal compounds

et al. 2015

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Rotational viscosity comparison of liquid crystals based on the molecular dynamics of mixtures

Wang¹,

Peng²,

Liu³

et al. 2015

Acta Phys. Sin.

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It is critical to improve the response speed of a liquid crystal wavefront corrector in order to increase the bandwidth of a liquid crystal adaptive optics system. The design of liquid crystal molecules with small rotational viscosity becomes a basic method of increasing the response speed of a liquid crystal wavefront corrector. Various phases of liquid crystal from molecular dynamics simulation are given in this paper, and the detailed computational methods of order parameter and rotational viscosity are also presented. Rotational viscosities of liquid crystals are compared based on the molecular dynamics of mixtures. The data fluctuation is reduced effectively through several simulations and the multiple analysis of original data. A detailed process of molecular dynamics of mixtures is given in this paper and the result is greatly satisfactory. We believe that one can perform a better molecular design using this process and obtain a better understanding of molecular interactions of LCs.

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Synthesis and Properties of Fluorinated Isothiocyanate Phenyl-Tolane Liquid Crystal Compounds

Cited by 3 publications

References 0 publications

P‐12.12: Development and Application of High Birefringence Liquid Crystal Materials

P‐12.12: Development and Application of High Birefringence Liquid Crystal Materials

Electrooptical properties of new type fluorinated phenyl-tolane isothiocyanate liquid crystal compounds

Rotational viscosity comparison of liquid crystals based on the molecular dynamics of mixtures

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