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Issue 11, 2019
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Light as a reaction parameter – systematic wavelength screening in photochemical synthesis

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Abstract

We unfold light as a reaction parameter in a continuous-flow photoreactor using 16 LED arrays with different emission bands (350–700 nm) but identical irradiances. For the perfluoroalkylation of 2-methylindole, three reaction mechanisms are revealed wavelength-selectively and subsequently transferred into independent synthetic routes: i) photoredox catalyzed by eosin Y, ii) via amine-based electron donor–acceptor (EDA) complexes (catalyst-free), and iii) via indole-based EDA complexes (catalyst- and additive-free). The presented methodology enables routine and systematic screening of irradiation wavelengths and intensities in photochemical synthesis.

Graphical abstract: Light as a reaction parameter – systematic wavelength screening in photochemical synthesis

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Publication details

The article was received on 17 Aug 2019, accepted on 09 Sep 2019 and first published on 09 Sep 2019


Article type: Communication
DOI: 10.1039/C9RE00339H
React. Chem. Eng., 2019,4, 1912-1916
  • Open access: Creative Commons BY license
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    Light as a reaction parameter – systematic wavelength screening in photochemical synthesis

    C. P. Haas, T. Roider, R. W. Hoffmann and U. Tallarek, React. Chem. Eng., 2019, 4, 1912
    DOI: 10.1039/C9RE00339H

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