Category: 39969-26-1

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

On the molecular structure, packing coefficients and thermal stabilities of the homologous series p-methoxy-XY-p’-alkyl tolanes was written by Prasad, J. Shashidhara. And the article was included in Molecular Crystals and Liquid Crystals in 1978.Category: ethers-buliding-blocks This article mentions the following:

The thermal stability in the p-methoxy-p‘-alkyltolan homologous series was studied by mol. packing coefficients (ratio of geometric volume of a mol. to the volume per mol. in the crystal) without actual conformation of the mols. in the crystalline state. The packing coefficient decreases for the nonmesogenic members (Me and Et) accounting for the decrease in stability and suddenly increases when the mesogenic state is encountered and then again decreases accounting for the thermal stability decrease within the mesogenic materials. In the experiment, the researchers used many compounds, for example, 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene (cas: 39969-26-1Category: ethers-buliding-blocks).

1-Methoxy-4-((4-propylphenyl)ethynyl)benzene (cas: 39969-26-1) belongs to ethers. Ether is less polar than esters, alcohols or amines because of the oxygen atom that is unable to participate in hydrogen bonding due to the presence of bulky alkyl groups on both sides of the oxygen atom. But ether is more polar than alkenes. Ethers feature bent C閳ユ彊閳ユ弲 linkages. In dimethyl ether, the bond angle is 111鎺?and C閳ユ彊 distances are 141 pm. The barrier to rotation about the C閳ユ彊 bonds is low. The bonding of oxygen in ethers, alcohols, and water is similar. In the language of valence bond theory, the hybridization at oxygen is sp3.Category: ethers-buliding-blocks

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

Silver-containing microemulsion as a high-efficient and recyclable catalytic system for hydration of alkynes was written by Dong, Qizhi;Li, Ningbo;Qiu, Renhua;Wang, Jinying;Guo, Cancheng;Xu, Xinhua. And the article was included in Journal of Organometallic Chemistry in 2015.Safety of 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene This article mentions the following:

A silver-catalyzed highly efficient and regioselective synthesis of ketones from a wide range of alkynes is described. The reaction is dramatically accelerated by its performance in aqueous emulsion, which is self-assembled by the addition of silver perfluorooctanesulfonate and perfluorooctanesulfonic acid (PFOS) to water. The reaction is conducted under convenient conditions with broad substrate scope, including a variety of aromatic and aliphatic terminal alkynes and internal alkynes. Furthermore, the air- and light-stable silver catalytic microemulsion can be reused for 4 times with minimal change in catalytic efficiency. In the experiment, the researchers used many compounds, for example, 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene (cas: 39969-26-1Safety of 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene).

1-Methoxy-4-((4-propylphenyl)ethynyl)benzene (cas: 39969-26-1) belongs to ethers. Of all the functional groups, ethers are the least reactive ones. Ether bonds are quite stable towards bases, oxidizing agents and reducing agents. Ethers feature bent C閳ユ彊閳ユ弲 linkages. In dimethyl ether, the bond angle is 111鎺?and C閳ユ彊 distances are 141 pm. The barrier to rotation about the C閳ユ彊 bonds is low. The bonding of oxygen in ethers, alcohols, and water is similar. In the language of valence bond theory, the hybridization at oxygen is sp3.Safety of 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene

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

New methods for calculating the temperatures and the enthalpy changes of virtual transitions and predicting phase diagrams – applied to the tolans was written by Domon, M.;Buisine, J. M.. And the article was included in Molecular Crystals and Liquid Crystals in 1987.Reference of 39969-26-1 This article mentions the following:

For a mesogen which does not exhibit an enantiotropic nematic phase when pure, 2 methods are proposed for the determination of the temperatures and enthalpy changes of the nematic-isotropic liquid virtual transitions. These calculations, based on Schroeder-van Laar and van Laar equations, use the value of the liquid appearance temperature for mixtures of the compound with another mesogen which exhibits the enantiotropic mesophase when pure. Both methods are applied to the study of the 1st 10 compounds in the 4-methoxy-4′-alkyltolan series. The results are used to determine the eutectic, liquid appearance and nematic disappearance temperatures of mixtures of 2 tolans that do not exhibit an enantiotropic nematic phase when pure. In 7 cases, an enantiotropic nematic phase is predicted and observed; in 1 case, the phase diagram differs from that expected; for the remainder, the calculated and exptl. data agree. In the experiment, the researchers used many compounds, for example, 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene (cas: 39969-26-1Reference of 39969-26-1).

1-Methoxy-4-((4-propylphenyl)ethynyl)benzene (cas: 39969-26-1) belongs to ethers. Ether is less polar than esters, alcohols or amines because of the oxygen atom that is unable to participate in hydrogen bonding due to the presence of bulky alkyl groups on both sides of the oxygen atom. But ether is more polar than alkenes. 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.Reference of 39969-26-1

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

Nematic tolanes and acetylenes was written by Skelton, Graham W.;Dong, Dewen;Tuffin, Rachel P.;Kelly, Stephen M.. And the article was included in Journal of Materials Chemistry in 2003.Synthetic Route of C18H18O This article mentions the following:

The 1st liquid crystals incorporating a nonconjugated C-C triple bond in the terminal chain to exhibit a nematic phase above the m.p. are reported. A variety of compounds incorporating a C-C triple bond in the terminal chain or between two Ph rings were synthesized as part of a study of the effects of the shape, conformation and rigidity of the terminal chains of liquid crystals on their mesophase behavior. Related tolanes incorporating an alkenyloxy chain with an addnl. C-C double bond or a simple alkoxy chain as a terminal substituent also were prepared for comparison purposes. In the experiment, the researchers used many compounds, for example, 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene (cas: 39969-26-1Synthetic Route 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. Ethers are good solvents partly because they are not very reactive. Most ethers can be cleaved, however, by hydrobromic acid (HBr) to give alkyl bromides or by hydroiodic acid (HI) to give alkyl iodides.Synthetic Route of C18H18O

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