Photodecomposition of bromophenols

• Photodecomposition serves as a potent elimination corridor for BPs in the environment.
• PBs decompose more effectively in the gaseous phase than in the aqueous phase.
• Photoreactivity of BPs decreases along the following sequence ortho > meta > para.
• TDDFT calculations reveal that higher brominated congeners display lower excitations energies, and are more labile to photodebrominate.