Chemical Identity and Structure

9,10-Bis(4-methoxyphenyl)anthracene belongs to the anthracene family of polycyclic aromatic hydrocarbons (PAHs). The anthracene backbone consists of three linearly fused six-membered aromatic rings and serves as the principal chromophore responsible for the compound's photophysical activity. Substitution at the sterically accessible 9- and 10-positions with 4-methoxyphenyl (anisyl) groups extends the π-conjugation of the system, red-shifts both absorption and emission compared with unsubstituted anthracene, and improves solid-state packing by reducing excimer quenching tendencies.

The methoxy (–OCH₃) groups are electron-donating substituents that raise the HOMO energy level relative to unsubstituted anthracene, narrowing the HOMO–LUMO gap and tuning the emission wavelength toward the blue-green region. This electronic fine-tuning is particularly valuable in designing organic light-emitting device (OLED) architectures where precise color coordinates are required.

Note: Exact spectroscopic parameters (absorption maximum, emission maximum, quantum yield, extinction coefficient) should be confirmed from the Aladdin Scientific product datasheet or primary literature before use in quantitative experiments.

Photophysical Properties and Fluorescence Behavior

Anthracene derivatives are well-known for their intense fluorescence arising from the S₁→S₀ radiative transition. The introduction of aryl groups at the 9- and 10-positions disrupts molecular planarity slightly due to steric interactions with the peri-hydrogens of the anthracene core, which can reduce intermolecular π–π stacking in the solid state and thereby suppress concentration quenching. The 4-methoxyphenyl substituents provide additional inductive and mesomeric electron donation, modulating excited-state energetics.

In dilute solution (e.g., in chloroform, toluene, or THF), 9,10-Bis(4-methoxyphenyl)anthracene is expected to exhibit a characteristic vibronic fine structure in both absorption and emission spectra, typical of anthracene-based fluorophores. High fluorescence quantum yields are generally associated with such 9,10-diarylanthracene scaffolds, making them attractive as reference standards and emitter dopants.

Review flag: Specific quantum yield values, Stokes shift, and solvent-dependent spectral data are not confirmed from the source material and should be verified against the product datasheet or peer-reviewed literature prior to reporting.

Laboratory Handling and Storage Guidelines

Storage: Store 9,10-Bis(4-methoxyphenyl)anthracene in a cool, dry location away from direct light. Because anthracene derivatives can undergo photooxidation (endoperoxide formation) upon prolonged exposure to light and oxygen, it is advisable to keep the compound in amber vials or foil-wrapped containers under an inert atmosphere (nitrogen or argon) when long-term storage is required. Confirm recommended storage temperature from the product label or Safety Data Sheet (SDS).

Handling precautions: As with most fine organic reagents, avoid inhalation of dust or aerosols. Use appropriate personal protective equipment (PPE) including nitrile gloves, safety glasses, and a lab coat. Conduct weighing operations in a fume hood or ventilated enclosure. Consult the Aladdin Scientific SDS for full toxicological and first-aid information before use.

Solubility: The compound is expected to dissolve readily in common organic solvents such as chloroform, dichloromethane, toluene, and THF, while exhibiting low solubility in water and protic solvents. Solubility data should be confirmed experimentally or from the datasheet for each specific application.

Stability: Avoid extended exposure to strong oxidising agents, strong acids, and UV radiation during routine bench work to maintain compound integrity.

Research Applications

Organic Light-Emitting Diodes (OLEDs): 9,10-Diarylanthracene derivatives are among the most extensively studied blue and blue-green emitter candidates for OLED device architectures. Their high photoluminescence efficiency, relatively wide bandgap, and good film-forming properties make them suitable as emitter dopants or host materials in the emitting layer (EML). 9,10-Bis(4-methoxyphenyl)anthracene can serve as a model compound for structure–property relationship studies comparing the effect of methoxy substitution on device performance metrics such as external quantum efficiency (EQE) and CIE color coordinates.

Fluorescence Probes and Sensors: The responsive fluorescence of anthracene-based dyes can be exploited in singlet oxygen detection assays (anthracene endoperoxide formation), oxygen sensing, and mechanofluorochromic studies. Researchers may use this compound as a spectroscopic reference or as a scaffold for further functionalisation.

Organic Photovoltaics and Charge-Transport Studies: As a conjugated organic molecule, 9,10-Bis(4-methoxyphenyl)anthracene may be investigated in the context of organic field-effect transistors (OFETs) or as a model chromophore in energy-transfer studies using Förster resonance energy transfer (FRET) frameworks.

Photophysical Benchmarking: High-purity 9,10-diarylanthracene compounds are frequently employed as fluorescence quantum yield standards. Researchers should verify whether the specific compound at the required purity grade meets established reference criteria before use as a standard.

Purity, Quality Specifications, and Ordering Information

Aladdin Scientific supplies 9,10-Bis(4-methoxyphenyl)anthracene under SKU B152535. For fluorescence, OLED, and other photophysical applications, reagent purity is a critical determinant of experimental reproducibility. Trace impurities, particularly other fluorescent compounds or quenchers, can substantially alter measured quantum yields and emission spectra.

Researchers and procurement personnel should consult the current Certificate of Analysis (CoA) available on the Aladdin Scientific website for the specific lot-level purity data, characterisation methods (e.g., HPLC, NMR), and physical property data confirmed for each batch. Purity grades and available pack sizes should be confirmed at the time of ordering, as these may be updated.

For bulk quantities, custom purity grades, or specific analytical certifications required for regulatory or publication purposes, contact Aladdin Scientific technical support or your regional sales representative directly.