technical info
Structural Characteristics: Azo compounds contain the -N=N- double bond, which is the main chromophore group, enabling the production of vibrant and stable colors.
Optical Properties: The azo group can exhibit a wide range of colors from yellow to deep red, depending on the conjugated system.
Photoisomerization: Azo compounds possess cis-trans isomerization properties, enabling their application in photochromic materials.
Substituent Effects: Introducing different substituents (-OH, -SO3Na, -Cl, etc.) on the benzene ring can significantly influence the dye's water solubility and color.
Polymer Applications: Azo initiators (e.g., AIBN) are commonly used free-radical initiators in polymerization reactions.
Blowing Agent Applications: Certain azo compounds (e.g., azodicarbonamide, ADC) decompose upon heating, releasing nitrogen gas, and are used in plastic and rubber foaming.
Thermal Stability: Azo products with different structures exhibit a wide range of decomposition temperatures, typically between 120°C to 200°C.
Environmental Trends: Traditional azo dyes have been restricted by the EU REACH regulation due to the potential release of aromatic amines.
Pharmaceutical Applications: Some azo derivatives can serve as drug carriers or precursors, with applications in controlled-release systems.
Pigment Advantages: Insoluble azo pigments exhibit excellent light and weathering fastness, widely used in construction materials and automotive coatings.
Electronic Materials: Azo compounds have potential applications in photoresists, photosensitive materials, and liquid crystal displays.
Synthetic Flexibility: Azo compounds can be synthesized into a diverse range of derivatives through diazotization and coupling reactions.
Safety Considerations: Some azo products may pose potential carcinogenic risks, requiring compliance with industrial safety regulations.
Nano Applications: Azo groups can be combined with nanoparticles to prepare photo-responsive nanomaterials.
Green Chemistry: Recent research focuses on developing low-toxicity, water-based eco-friendly azo dyes to reduce environmental impact.
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Trade Name |
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2,2′-Azobis (2-amidinopropane) dihydrochloride
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2,2-Azobis[2-methyl-N-(2-hyd roxyethyl)propionamide]
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2,2′-Azobis(2,4-dimethyl)valeronitrile
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Dimethyl 2,2'-azobis(2-methylpropionate)
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2,2'-Azobis-(2-methylbutyronitri le)
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2,2'-Azobis-(2-methylbutyronitri le)
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