125151-55-5

Upstream product

• 115-19-5 2-methyl-but-3-yn-2-ol 
• 116223-55-3 1-iodo-4- (pentyloxy) benzene 
• 540-38-5 p-Iodophenol 
• 110-53-2 1-Bromopentane 
• 628-17-1 amyl iodide 
• 106-41-2 4-bromo-phenol 
• 30752-18-2 1-bromo-4-pentyloxybenzene 

Downstream Products

• 239104-42-8 trifluoro-methanesulfonic acid 2-methyl-4-(4-pentyloxy-phenylethynyl)-phenyl ester 
• 239104-45-1 2-[2-methyl-4-(4-pentyloxy-phenylethynyl)-phenoxy]-tetrahydro-pyran 
• 239104-41-7 2-methyl-4-(4-pentyloxy-phenylethynyl)-phenol 
• 79887-16-4 1-ethynyl-4-(pentyloxy)benzene 

Relevant academic research and scientific papers

High birefringence nematic liquid crystals for display and telecom applications

Several compounds with high birefringence and, having tolane structure were synthesized. For a high polarizability, isothiocyanato (NCS) terminal group was introduced. Another goal of this study was reduction of melting point and smectic phases by introduction of fluorine as lateral substituent. The transition temperatures for all the synthesized compounds and the refractive and dielectric indices for one of the compounds have been determined. Electro-optic (EO) measurements were also performed.

Synthesis and mesomorphic properties of some fluorinated benzoate liquid crystals

Three series of [4-(4′-n-alkyloxyphenyl)acetylenyl]-2,6- difluorophenyl fluorinated benezoates and one series of fluorinated benzoates with 2,3,5,6-tetrafluorophenylene group and semi-perfluorocarbon chain have been synthesized. Their phase transition temperatures have been measured by texture observation in a polarizing microscope and confirmed by DSC. For the series without fluorocarbon chains, increasing the quantity of fluorosubstituents on the terminal phenyl groups decreased nematic stability (TN-I), but the breadth of the SmA phase range was increased. Lateral fluorosubstitution in the central group lowered the nematic stability (TN-I) and decreased the breadth of the SmA phase range. The series with semiperfluorocarbon chains were more likely to form SmA phases than the series with hydrogencarbon chains, and with the increasing of fluorosubstituents quantity on the terminal phenyl groups nematic and SmA stability (TN-I and TsmA-N) were both decreased.

High birefringence phenylacetylene liquid crystals with low viscosity

We have synthesized new high Δ n 3-ring phenylacetylene(3PA) liquid crystals which have substituent groups with core center phenyl ring and investigated the effects of substitution on physical properties. Nematic range and viscosity were improved remarkab

Synthesis and mesomorphic properties of some fluoro-substituted benzoates

Several series of fluoro-substituted benzoate liquid crystals have been synthesized. The results showed that the SmA phase is enhanced with the increasing of the degree of fluoro-substitution on the para- and meta-position of the terminal phenyl groups. And the molecules which have same molecular structural formula show nearly the same melting points. It is also discussed about the effect of the ester bond's direction on the mesomorphic properties.