Chemical Identity and Structural Features

4-Cyano-3-fluorophenyl 4-(4-ethylcyclohexyl)benzoate (Aladdin SKU: C1065064) is a structurally anisotropic organic molecule belonging to the broad family of cyanophenyl benzoate esters. Its molecular architecture consists of three key regions:

• Polar headgroup: A phenyl ring bearing both a nitrile (–CN) substituent at the 4-position and a fluorine atom at the 3-position. The strong dipole moment of the CN group, combined with the moderate electronegativity of fluorine, imparts significant polarity and dielectric anisotropy to the molecule.
• Ester linkage (–COO–): Connects the polar aromatic headgroup to the central benzoate core, providing rotational flexibility and contributing to mesophase stability in liquid crystal host systems.
• Alicyclic tail: A 4-(4-ethylcyclohexyl)phenyl moiety forms the tail section. The trans-cyclohexyl ring reinforces molecular linearity and rigidity, while the terminal ethyl chain modulates melting point and solubility.

This rod-like (calamitic) molecular geometry is characteristic of nematic and smectic liquid crystal mesogens. The incorporation of fluorine adjacent to the cyano group is a widely used strategy in liquid crystal chemistry to tune dielectric properties, viscosity, and phase transition temperatures without significantly altering molecular length.

Physicochemical Properties and Handling Guidelines

Because detailed characterization data specific to this compound are not fully disclosed in the current source material, the following guidance is based on structural analogy with well-characterized cyanophenyl benzoate esters and general best-practice laboratory handling. Researchers should always consult the Certificate of Analysis (CoA) supplied with each lot for confirmed purity, melting point, and spectral data.

Expected Physicochemical Profile

• Appearance: Likely a white to off-white crystalline powder or low-melting solid, consistent with analogous mesogens of similar molecular weight.
• Solubility: Expected to dissolve readily in common organic solvents such as dichloromethane, chloroform, tetrahydrofuran, and toluene. Sparingly soluble or insoluble in water due to the highly nonpolar cyclohexylphenyl tail.
• Thermal behavior: Compounds of this structural class typically exhibit crystal-to-mesophase and mesophase-to-isotropic transitions detectable by differential scanning calorimetry (DSC) and polarized optical microscopy (POM). Specific transition temperatures should be confirmed experimentally.

Storage Recommendations

• Store in a tightly sealed container under cool, dry conditions, away from light and moisture.
• Refrigeration (2–8 °C) is recommended for long-term storage to prevent decomposition or phase changes.
• Avoid prolonged exposure to strong oxidizers, strong bases, or high temperatures that could hydrolyze the ester linkage.

Safety Precautions

• The nitrile group warrants standard precautions for organonitrile compounds: work in a well-ventilated fume hood, wear appropriate PPE (gloves, safety glasses, lab coat).
• Consult the Safety Data Sheet (SDS) before use. No specific acute toxicity data are available in the current source; treat as a potentially harmful chemical until full toxicological data are obtained.

Research Applications and Use Cases

4-Cyano-3-fluorophenyl 4-(4-ethylcyclohexyl)benzoate is primarily of interest in the following research domains:

Liquid Crystal Science and Display Technology

Cyanophenyl benzoate esters bearing fluorine substituents are canonical components of nematic liquid crystal mixtures used in electro-optic applications. The lateral fluorine at the 3-position of the cyanophenyl ring modifies the dielectric anisotropy (Δε) and reduces rotational viscosity compared to non-fluorinated analogs, thereby improving switching speeds in liquid crystal display (LCD) cells. This compound may serve as:

• A neat mesogen or dopant in nematic host mixtures for evaluation of phase behavior and electro-optic response.
• A structural reference compound in quantitative structure–property relationship (QSPR) studies correlating substitution patterns with mesophase temperatures and physical constants.

Organic Synthesis and Medicinal Chemistry

The molecule's ester core, aromatic fluorine, and nitrile handle make it a versatile intermediate or building block:

• The ester bond can be selectively hydrolyzed to yield the corresponding phenol (4-cyano-3-fluorophenol) or carboxylic acid, enabling further derivatization.
• The aryl nitrile can be transformed into amines, tetrazoles, or amides via standard functional-group interconversions, broadening its utility in medicinal chemistry fragment libraries.

Materials Science and Self-Assembly Research

Rod-like molecules with defined polarity gradients are extensively studied for thin-film fabrication, self-assembled monolayers (SAMs), and organic semiconductor blends. Researchers investigating anisotropic coatings or polarized-emission materials may employ this compound as a model calamitic molecule.

Quality, Purity, and Specification Guidance

When ordering or using 4-Cyano-3-fluorophenyl 4-(4-ethylcyclohexyl)benzoate (C1065064) from Aladdin Scientific, researchers should consider the following specification points:

• Purity verification: High-performance liquid chromatography (HPLC) and nuclear magnetic resonance (NMR) spectroscopy are the standard methods for confirming compound identity and purity. Request the lot-specific CoA to verify that the material meets the purity grade required for your application (e.g., ≥98% for electro-optic measurements, or lower grades acceptable for synthetic use).
• Lot-to-lot consistency: For quantitative liquid crystal studies where transition temperatures are critical, ensure that the same lot is used throughout a series of experiments, or re-characterize each new lot by DSC.
• Handling purity: Moisture and particulate contamination can shift phase transition temperatures and degrade electro-optic performance. Use dry, clean glassware and handle in low-humidity environments where possible.
• Analytical traceability: The PubChem identifier TJY-250415 can be used to cross-reference structural data in public databases, supporting compound authentication workflows.

For application-specific purity requirements or custom lot sizes, contact Aladdin Scientific technical support or your regional sales representative.