Fabry, DavidDavidFabryHo, Yee AnnYee AnnHoZapf, RalfRalfZapfTremel, WolfgangWolfgangTremelPanthöfer, MartinMartinPanthöferRueping, MagnusMagnusRuepingRehm, Thomas H.Thomas H.Rehm2022-03-052022-03-052017https://publica.fraunhofer.de/handle/publica/24809510.1039/C7GC00497DTitanium dioxide was applied as an immobilized photocatalyst in a microstructured falling film reactor for the continuous-flow C-H arylation of heteroarenes with aryldiazonium salts as the starting material. Detailed investigations of the catalyst and a successful long-term run proved its excellent usability for this process. Very good yields up to 99% were achieved with broad substrate scope and were compared with batch synthesis. The transfer to the continuous-flow mode revealed an impressive boost in reactor performance solely resulting from the improved irradiation and contact of the catalyst, substrate and light.enphotocatalysiscontinuous flowmicroreactor660journal article