Photolysis of CH3I under UV irradiation: effects of solvents, pH, and concentration.

In this work, the effects of the solvents, pH, and concentration on the photolysis of CH3I under UV irradiation were investigated. The photolysis of CH3I mainly occurs in the gas phase and is faster in its aqueous solution compared to in its n-hexane and methanol–water solutions. UV irradiation-induced photolysis of CH3I produces I2 and I3− whereas the formation of the latter is affected by the former. In addition, both the pH and concentration of CH3I aqueous solutions affect the formation and transformation of I3− and I2. The results are helpful and referable to understanding the photolysis behavior of CH3I under UV irradiation. [ABSTRACT FROM AUTHOR]