1,3,5-Trimethoxybenzene can be used to quench residual chlorine and bromine without altering disinfection byproducts that are reactive toward traditional quenchers.

A series of Fe(iii) complexes was recently reported that are active for photocatalytic hydrogen generation when paired with fluorescein and triethylamine. Herein we report an Fe(iii) complex immobilized on TiO2 and SrTiO3 that is significantly more active than the homogeneous system, achieving up to 7800 turnovers in 31 hours.