Chen, Ran et al. published their research in Liquid Crystals in 2019 | CAS: 39969-26-1

1-Methoxy-4-((4-propylphenyl)ethynyl)benzene (cas: 39969-26-1) belongs to ethers. The oxygen atom in ethers are more electronegative than carbon, thus the hydrogens which are alpha to the ethers are more acidic than the simple hydrocarbons. Autoxidation is the spontaneous oxidation of a compound in air. In the presence of oxygen, ethers slowly autoxidize to form hydroperoxides and dialkyl peroxides. If concentrated or heated, these peroxides may explode. To prevent such explosions, ethers should be obtained in small quantities, kept in tightly sealed containers, and used promptly.Electric Literature of C18H18O

High-frame-rate liquid crystal phase modulator for augmented reality displays was written by Chen, Ran;Huang, Yuge;Li, Jian;Hu, Minggang;Li, Juanli;Chen, Xinbing;Chen, Pei;Wu, Shin-Tson;An, Zhongwei. And the article was included in Liquid Crystals in 2019.Electric Literature of C18H18O This article mentions the following:

We optimize a new liquid crystal mixture with wide nematic range, high birefringence (铻杗), high resistivity, moderate dielec. anisotropy (铻栬敋) and relatively low rotational viscosity for augmented reality display applications. High 铻杗 and large 铻栬敋 allow a thin cell gap (d 閳?1.5 娓璵) to be employed in a reflective liquid-crystal-on-silicon (LCoS) device to achieve 2锜?phase change at 5 V and 2.87 ms average phase-to-phase response time at 40鎺矯 without complicated overdrive circuitry. Such a fast response time enables an LCoS panel to achieve 240 Hz frame rate for field sequential color operation to avoid image flickering. In the experiment, the researchers used many compounds, for example, 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene (cas: 39969-26-1Electric Literature of C18H18O).

1-Methoxy-4-((4-propylphenyl)ethynyl)benzene (cas: 39969-26-1) belongs to ethers. The oxygen atom in ethers are more electronegative than carbon, thus the hydrogens which are alpha to the ethers are more acidic than the simple hydrocarbons. Autoxidation is the spontaneous oxidation of a compound in air. In the presence of oxygen, ethers slowly autoxidize to form hydroperoxides and dialkyl peroxides. If concentrated or heated, these peroxides may explode. To prevent such explosions, ethers should be obtained in small quantities, kept in tightly sealed containers, and used promptly.Electric Literature of C18H18O

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem