High Quality Chromium(III) Acetylacetonate with CAS number 21679 - 31 - 2 is a well - known coordination compound. Its chemical formula is Cr(C₅H₇O₂)₃. The compound has a molecular weight of approximately 349.31 g/mol. It usually appears as a purple crystalline solid. This product offers the best price in the market while maintaining high quality standards. It has good solubility in some organic solvents such as chloroform, benzene, and toluene. The melting point of Chromium(III) acetylacetonate is around 216 - 218 °C. It is stable under normal storage conditions but should be kept away from strong oxidizing agents and high - energy radiation sources.
In the field of catalysis, Chromium(III) acetylacetonate serves as an important catalyst precursor. It can be used in various organic synthesis reactions, such as polymerization reactions. For example, it can participate in the polymerization of olefins to produce polymers with specific structures and properties. In materials science, it is used in the preparation of thin films and nanoparticles. By using appropriate deposition techniques, thin films containing chromium can be prepared on substrates, which have potential applications in optical and electronic devices. Additionally, it is also used in the field of analytical chemistry as a reference standard for elemental analysis of chromium. In biological research, it can be used as a contrast agent in certain imaging techniques due to its unique coordination properties.
When using Chromium(III) acetylacetonate in organic synthesis, first, you need to choose a suitable reaction solvent according to the reaction requirements. As mentioned earlier, common organic solvents like chloroform or benzene can be used. Weigh an appropriate amount of the product accurately according to the stoichiometry of the reaction and add it to the reaction system. The reaction temperature and time should be strictly controlled according to the specific reaction conditions. For thin - film preparation, you can use physical vapor deposition or chemical solution - based methods. In physical vapor deposition, the product is heated in a vacuum chamber to evaporate and deposit on the substrate. For chemical solution - based methods, dissolve the product in a suitable solvent to form a precursor solution, and then use methods such as spin - coating or dip - coating to deposit the solution on the substrate and then perform subsequent heat treatment steps.
Case 1: Polymerization of Propylene
In a research project focused on preparing high - performance polypropylene, Chromium(III) acetylacetonate was used as a catalyst precursor. A specific amount of the compound was dissolved in toluene, and then a cocatalyst was added. Under a controlled temperature of 80 °C and a pressure of 2 MPa, the propylene monomers were introduced into the reaction system. After a reaction time of 4 hours, a polypropylene product with a high molecular weight and a narrow molecular weight distribution was obtained. The product showed excellent mechanical properties, which were suitable for use in the automotive industry for manufacturing parts such as bumpers.
Case 2: Thin - Film Preparation for Optoelectronic Devices
In an optoelectronic research group, Chromium(III) acetylacetonate was used to prepare chromium - containing thin films. The compound was dissolved in ethanol to form a 0.1 M precursor solution. The solution was spin - coated onto a glass substrate at a speed of 3000 rpm for 30 seconds. After that, the coated substrate was annealed at 400 °C for 2 hours. The resulting thin film had good optical transmittance and electrical conductivity, which was further used in the fabrication of organic light - emitting diodes (OLEDs) and showed improved device performance.
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