TCI E0703 4-(trans-4-Ethylcyclohexyl)benzonitrile is a mesogenic compound that combines an ethyl-substituted cyclohexane ring in the trans configuration with a benzene ring terminated by a nitrile group. TCI places it in the liquid crystal materials category, a class of substances engineered to display ordered phases intermediate between the solid and liquid states. In the laboratory, this compound serves as a building-block component of liquid crystal mixtures and as a model substance for studying the relationship between molecular structure and phase behaviour, making it especially useful for researchers working on display materials and molecular electronics.
The property that makes it a widely chosen material is its rigid, linear rod-like molecular shape, a consequence of the trans configuration of the cyclohexane ring, which extends the ethyl chain along the long molecular axis. Geometry of this kind supports parallel molecular packing, the prerequisite for formation of a nematic phase. The terminal nitrile group carries a large dipole moment oriented along the molecular axis, producing positive dielectric anisotropy and rendering the molecule responsive to an applied electric field. The combination of a non-conjugated cyclohexane core with an aromatic ring balances the ordering tendency against the fluidity needed for practical mixtures.
In Indonesian laboratories, the material is typically used in university and institutional research groups working on materials science, applied physics, and chemistry of electronic materials. It is handled in small quantities on the bench during the formulation of liquid crystal blends, in thermal and optical phase characterisation, and in teaching or thesis work where students examine how molecular architecture governs mesophase behaviour. Research-grade packaging from TCI suits this scale of work, where a single container supports repeated small-batch experiments.
- Liquid crystal mixture formulation: acts as a nematic host component whose rigid rod geometry and positive dielectric anisotropy contribute directly to the alignment and field response of the final blend.
- Structure–property relationship studies: serves as a well-defined reference molecule for correlating trans-cyclohexane geometry and terminal nitrile polarity with observed mesophase stability and transition behaviour.
- Display materials research: supports investigation of electro-optical switching, because the axial nitrile dipole makes molecular reorientation under an applied electric field straightforward to induce and measure.
- Thermal phase characterisation: provides a suitable sample for differential scanning calorimetry and polarised optical microscopy work, where ordered mesophases between the crystalline and isotropic states are identified.
- Molecular electronics and teaching applications: functions as a model mesogen for coursework and thesis projects demonstrating how molecular shape and dipole placement determine anisotropic material properties.
| Brand | TCI (Tokyo Chemical Industry) |
|---|---|
| CAS number | 72928-54-2 |
| Molecular formula | — |
| Purity | — |
| Category | Materials Science > Electronic Materials > Liquid Crystal (LC) Materials |
| Pack sizes | research-scale laboratory packaging; available pack sizes are confirmed at the time of ordering |
| Physical form | — |
| Storage | store in a closed original container in a cool, dry place away from light, following the manufacturer's product documentation |
- Catalogue code: E0703
Keep the compound in its original tightly closed container in a cool, dry, and well-ventilated area, protected from direct sunlight and away from heat sources or ignition sources. Amber glass or the supplier's original packaging is suitable, since exposure to light and moisture should be limited; secondary containment is advisable for longer storage. Handle in a fume hood using nitrile gloves, safety glasses, and a laboratory coat, and avoid inhalation of dust or contact with skin and eyes. Use clean, dry spatulas when weighing to prevent contamination that could alter phase behaviour, and always consult the manufacturer's safety data sheet before use and before disposal of residues.
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