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Chemical IR-spectroscopy of photochemical organic reactions in micro reactors



Consisting of 4 subprojects and 10 research teams of the Albert-Ludwigs-University of Freiburg and the Karlsruhe Institute of Technology (KIT), the project ProMiSe ("Assessing and Controlling Dynamic Local Process Conditions in Microreactors via Novel Integrated Microsensors") is funded by the German Research Foundation (DFG, Research Unit 2383). Subproject 3, in which the Gisela and Erwin Sick Chair of Microoptics is involved, focuses on photochemistry in microreactors. Several chemical reactions, which have already been successfully synthesized in traditional reaction flasks, will be transferred to flow-through synthesis in microreactors. As a continuous multistage synthesis, these reactions are activated with blue to ultraviolet light of varying intensity. Measurements along the reactor channel using spatially resolved IR spectroscopy provide a better insight into the dynamics of local transport and reaction processes of such systems. The optical system is developed exclusively for this application by Professor Zappe and his team and is based on tunable Fabry-Perot filters in the near to mid infrared range. Furthermore, these sensor data are used for a closed control loop, which allows the optimization of yield, product quality and flow time.


01.09.2019 bis 31.08.2022


Prof. Dr. Hans Zappe


David Ilioaë


DFG Research Unit 2383


Fabry–Perot filter, infrared spectroscopy, microreactor, flow chemistry, photochemistry, microsensor, control engineering
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