2,2′-bipyridine, with the CAS number 366-18-7, is a heterocyclic organic compound. The product we supply is factory - sourced and comes at the best price. It appears as a white to light - yellow crystalline powder. The molecular formula of 2,2′-bipyridine is C₁₀H₈N₂, and its molecular weight is approximately 156.18 g/mol. The compound has a melting point in the range of 69 - 72°C and a boiling point of about 272 - 273°C. It is sparingly soluble in water but more soluble in organic solvents such as ethanol, ether, and chloroform.
2,2′-bipyridine has a wide range of applications in various fields. In the field of coordination chemistry, it is a commonly used ligand. It can form stable complexes with a variety of metal ions, including transition metals like iron, copper, and ruthenium. These metal - 2,2′-bipyridine complexes have unique optical, electronic, and magnetic properties, which make them useful in catalysis. For example, some ruthenium - 2,2′-bipyridine complexes are used as catalysts in redox reactions and photochemical reactions.
In analytical chemistry, 2,2′-bipyridine can be used as a reagent for the detection and determination of metal ions. It forms colored complexes with certain metal ions, and the intensity of the color can be measured to quantify the amount of metal ions in a sample.
It also has applications in the area of molecular electronics and materials science. The complexes formed with 2,2′-bipyridine can be incorporated into organic light - emitting diodes (OLEDs) and other optoelectronic devices to enhance their performance.
When using 2,2′-bipyridine, proper safety precautions should be taken. First, it should be stored in a cool, dry place away from direct sunlight and sources of heat. When handling the product, it is recommended to wear appropriate personal protective equipment, such as gloves and safety glasses.
In coordination chemistry experiments, to form metal complexes, 2,2′-bipyridine is usually dissolved in an appropriate organic solvent. The metal salt is then added to the solution under suitable reaction conditions, such as heating and stirring. The reaction time and temperature need to be carefully controlled according to the specific metal ion and the desired complex.
For analytical applications, a known amount of 2,2′-bipyridine is added to the sample solution containing the metal ions to be detected. After a certain reaction time, the absorbance of the solution is measured using a spectrophotometer at the characteristic wavelength of the metal - 2,2′-bipyridine complex.
Case 1: Catalysis in Organic Synthesis
A research group was working on a project to synthesize a particular organic compound through a redox reaction. They used a ruthenium - 2,2′-bipyridine complex as a catalyst. They dissolved 2,2′-bipyridine in ethanol and mixed it with a ruthenium salt solution. After refluxing the mixture for several hours, the resulting ruthenium - 2,2′-bipyridine complex was isolated. In the subsequent redox reaction of the organic substrates, the catalyst showed high activity and selectivity, resulting in a high yield of the desired product. The reaction time was significantly reduced compared to the reactions without the catalyst, and the product was easy to separate and purify.
Case 2: Metal Ion Detection in Environmental Samples
An environmental monitoring laboratory needed to determine the concentration of iron ions in a water sample. They added a specific amount of 2,2′-bipyridine to the water sample. The 2,2′-bipyridine reacted with the iron ions in the sample to form a red - colored complex. By measuring the absorbance of the solution at 522 nm using a spectrophotometer and comparing it with a calibration curve prepared with standard iron solutions, they were able to accurately determine the concentration of iron ions in the water sample.
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