Photochemical screening reactor

Reactor 19 [R 19] Photochemical Active Catalyst Parallel Screening Reactor... [Pg.459]

The photochemical reactor should be adequately provided with a protective screen. [Pg.65]

Utilizing the reactor developed by Jensen, Beeler and co-workers developed a platform for multidimensional reaction screening of photochemical reactions. This platform employed photo-optical components... [Pg.179]

We present here the first experimental demonstration of photochemical bistability in an open reactor. This bistable reaction results from the non-linear properties of a photochromic system the dimer of the triphenylimidazyl radical in chloroform. Hysteresis is observed on the plots of the stationary states of the system over a wide range of flow rates. Within this region, the system is bistable and can be made to flip from one state to the other by an external manipulation. One of the stable states is characterized by a high concentration of violet radicals 2 while in the other the violet radicals are replaced by highly fluorescent compounds. Mechanistic studies showed that this bistability was due to a positive feedback loop. This was thought to arise from the screening effect of the violet radicals 2 with respect to the irradiation of the triphenyl imidazole 3 in combination with an inhibition of the violet radicals 2 by the products of photolysis of triphenylimidazole 3. [Pg.487]

Big Chemical Encyclopedia