Stilbene
Overview
Stilbene is an organic hydrocarbon consisting of two phenyl groups linked by an ethylene bridge. It exists in two isomeric forms: trans-stilbene (more stable) and cis-stilbene. The compound is notable for its fluorescence properties and role as a scaffold in synthesizing pharmaceuticals, agrochemicals, and specialty chemicals. First isolated in 1843, stilbene derivatives are now industrially significant, particularly in optoelectronics and photochemistry. Its derivatives include resveratrol, a naturally occurring polyphenol with antioxidant properties.
Physical and Chemical Properties
Trans-stilbene forms colorless crystals with a melting point of 122–125°C and exhibits strong blue fluorescence under UV light. The cis-isomer is less stable and tends to isomerize to the trans-form under light or heat. The compound is chemically stable but undergoes reactions typical of alkenes, such as hydrogenation and epoxidation. Its photoactivity makes it useful in studies of photochemical kinetics and as a laser dye solvent.
Main Applications
Stilbene serves as a precursor for dyes (e.g., stilbene dyes for paper and textiles) and optical brighteners in detergents. In pharmaceuticals, it is used to synthesize drugs like diethylstilbestrol (historically) and resveratrol analogs. Industrial applications include UV-curable resins and organic light-emitting diodes (OLEDs). Its fluorescent properties are exploited in molecular probes and sensors for biochemical research.
Safety and Storage
Stilbene poses moderate toxicity; dust inhalation or skin contact may cause irritation. Use personal protective equipment (PPE) like gloves and goggles during handling. Storage requires protection from light and moisture to prevent degradation. In case of spills, absorb with inert material and dispose of as hazardous waste. Regulatory compliance (e.g., REACH, OSHA) must be verified for specific derivatives.
B2B Procurement Guide
Buyers should confirm isomer type (trans/cis) and purity (typically 95–99%) for industrial use. Pricing varies by quantity and supplier; bulk orders (100+ kg) may reduce costs by 10–20%. Reputable suppliers provide certificates of analysis (CoA) and SDS documentation. Consider logistics: stilbene derivatives may require temperature-controlled shipping due to sensitivity to heat and light.
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