Addition of CH3NH2 and HI at ice cold conditions then stirr for 2 h, followed by heating at 80-90oC for 3 h, eventually you will get while solid. This one should go for washing with ether multiple times and dried in an oven at 600C for one day.
In detail you can find in nature paper about the preparation of CH3NH3I.
Thanks Marina..I have tried the way mentioned in most perovskite papers that is precipitating methyl ammonium iodide in ice bath. The precipitate was formed initially but it redissolved in that solution itself while evaporation process.
It is a collection of experimental sections from famous articles
Note: to be able to have the precipitation you need to first rotary evaporate the mixture after mixing at 0^o for 2h. Then secondly you need to wash what left after rotary evaporation with ether. At that time you will see the white ppt formed.
Hello everyone, I have a problem too, because it is acid-base reaction when I follow the articles and add HI to MA, after that the pH of the solution is higher than 9 -10. I have white powder and wash several times with ether.the problemis here, when I make a perovskite soltion (PbI2+MAI), solution is cloudy and I dont have clear-yellow solution. thanks in advance
Dear all, just being genuinely curious here as I begun on perovskite synthesis and fabrication work. Why do many groups prepare MAI or MABr via in-house synthesis methods? Wouldn't it be much easier to just purchase the chemicals directly? Was the rationale behind such a synthesis chemistry-driven or just cheaper to produce?
Hey Everyone, not sure if this question is still active, but does anyone know what pressure (in mmHG) is typically used for the vacuum drying step to purify MAI?
Hi Peter van der Windt , I am synthesizing MAI for my Perovskite regularly. Usually, I just put the vacuum at 600 mm/Hg at 80 - 100 deg. The vacuum will decrease while heating. so, you wont much bother about the vacuum pressure level. I have analysed XRD for both commercial and synthesized. Both are perfectly matched. So, the only thing we need to do is make sure that our sample is in vacuum...All the Best...
When the temperature is 80 degrees, I found that 1gMAI needs 15Ml ethanol to dissolve it. When mass production, the amount of solvent used for ethanol is very large. Please ask what simple purification method is there besides ethanol