4253-82-1

Basic information

• Product Name: 4-[(E)-4-Pyridinylazo]pyridine
• Synonyms: (E)-4,4'-Azobispyridine;(E)-4,4'-Azodipyridine;4,4'-[(E)-Azo]dipyridine;4-[(E)-4-Pyridinylazo]pyridine
• CAS NO: 4253-82-1
• Molecular Formula: C₁₀H₈N₄
• Molecular Weight: 184.2
• Mol File: 4253-82-1.mol
• Article Data: 15

Chemical Properties

• Melting Point: 108-109 °C(Solv: water (7732-18-5))
• Boiling Point: 344.9±17.0 °C(Predicted)
• Appearance: /
• Density: 1.18±0.1 g/cm3(Predicted)
• Storage Temp.: Inert atmosphere,Room Temperature
• PKA: 2.19±0.26(Predicted)
• CAS DataBase Reference: 4-[(E)-4-Pyridinylazo]pyridine(CAS DataBase Reference)
• NIST Chemistry Reference: 4-[(E)-4-Pyridinylazo]pyridine(4253-82-1)
• EPA Substance Registry System: 4-[(E)-4-Pyridinylazo]pyridine(4253-82-1)

Safety Data

• Hazardous Substances Data: 4253-82-1(Hazardous Substances Data)

Usage

General Description

4-[(E)-4-Pyridinylazo]pyridine, also known as 4-(E)-4-pyridylazo)pyridine, is a chemical compound commonly used as an analytical reagent for the spectrophotometric determination of several metal ions, such as copper, zinc, and nickel. It belongs to the family of azo compounds and is characterized by a structure with a pyridine ring substituted with an azo group. With its strong color development and specificity towards particular metal ions, 4-[(E)-4-Pyridinylazo]pyridine is widely employed in analytical chemistry for the detection and quantification of metal ions in various samples. The compound is also used in research and industry for its ability to form stable complexes with metal ions, making it valuable for selective extraction and separation processes. Additionally, 4-[(E)-4-Pyridinylazo]pyridine is a known skin and eye irritant and should be handled with proper care and safety precautions.

Upstream product

• 119416-31-8 [4,4']azoxypyridine 
• 504-24-5 4-aminopyridine 
• 1122-61-8 4-nitropyridine 
• 1124-33-0 4-nitraminopyridine N-oxide 
• 623-11-0 1-methyl-4-nitrosobenzene 
• 5221-42-1 4-acetylaminopyridine 
• 19808-51-6 1,2-di(pyridin-4-yl)hydrazine 
• 2632-99-7 1,2-bis(5-methylisoxazol-3-yl)hydrazine 

Downstream Products

• 19808-51-6 1,2-di(pyridin-4-yl)hydrazine 
• 1282616-25-4 trans-[(4,4'-azobispyridine)(Au(C₆F₄OCH₂C₆H₄O(CH₂)11CH₃-p))2] 
• 1282616-23-2 trans-[(4,4'-azobispyridine)(Au(C₆F₄O(CH₂)11CH₃-p))2] 

Relevant articles and documents

Reversing Chemoselectivity: Simultaneous Positive and Negative Catalysis by Chemically Equivalent Rims of a Cucurbit[7]uril Host

Enzyme catalysis has always been an inspiration and an unattainable goal for chemists due to features such as high specificity, selectivity, and efficiency. Here, we disclose a feature neither common in enzymes nor ever described for enzyme mimics, but one that could prove crucial for the catalytic performance of the latter, namely the ability to catalyze and inhibit two different reactions at the same time. Remarkably, this can be realized by two identical, spatially resolved catalytic sites. In the future, such a synchronized catalyst action could be used not only for controlling chemoselectivity, as in the present case, but also for regulating other types of chemical reactivity.

Thermally Twistable, Photobendable, Elastically Deformable, and Self-Healable Soft Crystals

The first example of a smart crystalline material, the 2:1 cocrystal of probenecid and 4,4′-azopyridine, which responds reversibly to multiple external stimuli (heat, UV light, and mechanical pressure) by twisting, bending, and elastic deformation without fracture is reported. This material is also able to self-heal on heating and cooling, thereby overcoming the main setbacks of molecular crystals for future applications as crystal actuators. The photo- and thermomechanical effects and self-healing capabilities of the material are rooted in reversible trans–cis isomerization of the azopyridine unit and crystal-to-crystal phase transition. Fairly isotropic intermolecular interactions and interlocked crisscrossed molecular packing secure high elasticity of the crystals.

Characterization and magnetic properties of two novel copper(II) coordination polymers prepared by different synthetic techniques

Two novel ternary Cu(II) coordination polymers with formulas {[Cu(μ2-AZPY)(H2BTC)2]}n (1) and {[Cu(μ2-AZPY)(μ2-HBTC)(H2O)]·AZPY}n (2) (AZPY – trans-4,4′-azobis(pyridine), BTC – benzene-1,3,5-tricarboxylate) have been synthesized using the solvothermal or diffusion techniques, respectively. Compounds were characterized by single crystal X-ray diffraction, thermogravimetry, infrared spectroscopy, elemental analysis and AAS. Removal of water and AZPY from the framework of 2 was investigated by wide-angle X-ray scattering measurements during in-situ heating. A magnetic study showed on antiferromagnetic coupling in 1 and 2 and magnetic properties may be influenced by both crystal field (CF) and inter-molecular interactions. The effective magnetic moment decreases from the values μeff = 4.97 μB for 1 and μeff = 3.39 μB for 2 at T = 290 K to the values of μeff = 1.41 μB for 1 and μeff = 1.27 μB for 2 at T = 2 K. The origin of the observed behavior is discussed.