Fig. 2: ESI-MS analysis of in-droplet trifluoromethylation reactions.
From: A droplet microfluidic platform for high-throughput photochemical reaction discovery

MH+ molecular ions were monitored for all trifluoromethylated products except for 1, which was prominently observed as a m/z = 309 fragment. Ru(bpy)3Cl2 tris(bipyridine)ruthenium(II) chloride.