Synthesis and properties of isothiocyanate liquid crystals containing cyclohexene unit

Wan, Danyang; Gu, Xin; Li, Juanli; Hu, Minggang; Che, Zhaoyi; Guo, Qiang; Mo, Lingchao; Li, Jian

doi:10.1080/02678292.2021.1873436

Cited by 5 publications

(1 citation statement)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The application of fluorinated NCS liquid crystals 7r and 8r with terphenyl skeleton is limited due to their very high melting points. We introduce a cyclohexene unit into the molecular skeleton (Figure 3) to replace one of the benzene rings, which greatly reduces the melting point of the liquid crystal and improves the solubility [23]. 3.…”

Section: Ncs Liquid Crystal Compounds Containing Cyclohexene Ringmentioning

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Ncs Liquid Crystal Compounds Containing Cyclohexene Ringmentioning

confidence: 99%