Performing a photochemical transformation using white light and the slow addition of a photocatalyst. On left there is a reaction that is stirred on a magnetic stirrer and kept under a slight over pressure of nitrogen gas to keep the reaction oxygen free. From the other side a quite old, but still perfectly working syringe pump is used to add a reagent to the reaction with a really low speed though a rubber septa. This technique is frequently used when low concentration matters and it is critical to keep at least one of reactants on a low but constant concentration.
9:32 pm  •  7 April 2020  •  110 notes  •  View comments