Ethynylbenzenes [Liquid Crystal (LC) Building Blocks]

Ethynylbenzenes [Liquid Crystal (LC) Building Blocks] — contains phenylacetylene derivatives substituted with bromo, fluoro, alkyl, and cyclohexyl groups, which provide a rigid ethynyl group as a building block for extending the conjugated system in liquid crystal mesogens.

These substituted ethynylbenzenes are used by liquid crystal materials researchers as intermediates in Sonogashira or Negishi coupling to assemble aryl-ethynyl-aryl mesogen chains that influence the optical anisotropy and phase transition temperature of the final liquid crystal product. Variations in halogen substituents and alkyl/cyclohexyl chains allow adjustment of the polarity and rigidity of the mesogen molecule.

Example products in this collection: TCI B3701 766-96-1 1-Bromo-4-ethynylbenzene, TCI C2670 873-73-4 1-Chloro-4-ethynylbenzene, TCI B2301 79887-09-5 1-Butyl-4-ethynylbenzene, TCI D2151 935-14-8 1,4-Diethynylbenzene, TCI F0470 766-98-3 1-Ethynyl-4-fluorobenzene, TCI E0505 14235-81-5 4-Ethynylaniline, TCI E1352 151361-87-4 1-Ethynyl-3,5-difluorobenzene, TCI E0564 79887-11-9 1-Ethynyl-4-hexylbenzene.

Pay attention to the position and type of substituents (halogen, alkyl, or trans-cyclohexyl) on the benzene ring, as these determine the geometry and mesomorphic properties of the final product, as well as the isomeric purity of the positional isomers. All products are genuine Tokyo Chemical Industry (TCI) Japan products, with purity, packaging, and storage conditions listed on each item's page.

Other categories listed alongside under Liquid Crystal (LC) Building Blocks, often used together in a single laboratory workflow:

Back to Liquid Crystal (LC) Building Blocks. For large-volume procurement, special packaging, or specific grades, contact the AMI Scientific team — the official distributor of TCI Japan in Indonesia — to check availability and lead time directly from Japan.

Related TCI catalogs (PDF)

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