Methylammonium halide
Methylammonium halides are organic halides with a formula of [CH3NH3]+X−, where X is F for methylammonium fluoride, Cl for methylammonium chloride, Br for methylammonium bromide, or I for methylammonium iodide. Generally they are white or light colored powders.
Applications
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These salts are components of perovskite solar cells, which are being evaluated for commercialization.[1] The iodide is the most commonly used. Magneto-optical data storage concepts are also being testing based on various ammonium halides.[2]
Production
[edit | edit source]These compounds are usually prepared by combining equimolar amounts of methylamine with the appropriate halide acid. For instance methylammonium iodide is prepared by combining methylamine and hydrogen iodide at 0 °C for 120 minutes followed by evaporation at 60 °C, yielding crystals of methylammonium iodide.[3]
- CH3NH2 + HI → [CH3NH3]I
Crystallography
[edit | edit source]These compounds' crystallography has been the subject of much investigation. J.S. Hendricks published an early paper on them in 1928.[4] Methylammonium chloride was investigated again in 1946[5] and methylammonium bromide in 1961.[6]
See also
[edit | edit source]References
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