Бромид хрома (CrBr3)

Description

Chromium bromide (CrBr3) is a chromium tribromide, a layered, hygroscopic crystalline material, a member of the chromium trihalide family along with CrCl3 and CrI3. Synonym: chromium tribromide.

Basic Attributes

• CAS No.: 10031-25-1
• Chemical formula: Br3Cr
• Molecular Weight: 371.6121
• Exact weight: 288.69600
• EU number: 233-088-6
• UNII: WZB719DDER
• PSA Features: 0
• XLogP3: 2.53680

Physico-chemical characteristics

• Density: 4.680 g/cm3
• Melting point: 1130 °C
• Solubility in water: insoluble in cold water, soluble in hot water
• Stability: hygroscopic

CrBr3 has a layered crystal structure similar to graphite, which allows the crystal to be exfoliated (exfoliated) down to monolayers by conventional mechanical methods. The material is a two-dimensional ferromagnetic semiconductor with a Curie temperature of about 40 K.

Scope of application

The layered structure makes chromium bromide an object of research in two-dimensional materials and spintronics: monolayers and few-layer CrBr3 samples are used to study the magnetic and optical properties of low-dimensional systems. The ferromagnetic characteristics of the material are promising for magnetic memory devices (MRAM), magnetic sensors and spin valves. In addition, the compound is used as a precursor to catalysts for ethylene oligomerization.

• studies of the magnetic and optical properties of two-dimensional materials and layered transition metal halides
• spintronics: magnetic memory devices, magnetic sensors, spin valves
• precursor to catalysts for ethylene oligomerization

Safety Information

There is no specific hazard classification for this compound in the original dump. As a hygroscopic transition metal halide, the substance requires protection from moisture during storage and handling: when working with powder and single crystals, use gloves and safety glasses, and avoid inhaling dust.

Storage and transportation conditions

Store in an airtight container in a dry place, preferably in an inert atmosphere or glove box to minimize hydrolysis in air due to its pronounced hygroscopicity. When working with single crystals for exfoliation, avoid prolonged contact with atmospheric air.

Place in the chromium trihalide family

CrBr3 occupies an intermediate position in the series of chromium trihalides CrCl3–CrBr3–CrI3 in terms of magnetic anisotropy and Curie temperature: chloride has a magnetic behavior closer to the two-dimensional Heisenberg type, iodide has strong anisotropy and a three-dimensional magnetic character, and bromide combines intermediate properties with a Curie temperature of about 40 K, convenient for laboratory use. cryogenic research.

Delivery form

The material is supplied in powder and single crystal forms, suitable for mechanical exfoliation to produce thin films of two-dimensional materials in a controlled atmosphere.