Ziegenbalg Dirk, Kreisel Günter, Weiß Dieter, Kralisch Dana
Institut für Technische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany.
Photochem Photobiol Sci. 2014 Jul;13(7):1005-15. doi: 10.1039/c3pp50302j. Epub 2014 Apr 22.
In this work, the use of OLEDs as light sources to initiate photochemical reactions is presented for the first time. A newly developed modular photoreactor system utilising microstructured reactors was equipped with commercially available OLED panels. The technical feature of being a surface emitter, the low thickness and the potentially high luminescent efficiency give reason to expect this kind of light source to be well suited for photochemical reactions. The reactor system was investigated by using photooxygenations as benchmark reactions. In detail, photosensitised [4 + 2]-cycloadditions and [2 + 2]-cycloadditions of (1)O2 were examined as well as Schenck-ene-reactions. It was demonstrated that OLEDs can be successfully used for conducting photochemical reactions. Moreover the equilibrium concentration of (1)O2 can be increased by varying the process conditions. Based on the experimental investigations, a reactor comparison showed that, with respect to productivity and efficiency, the investigated microstructured photoreactor is currently not outperforming conventional batch reactors.
在这项工作中，首次展示了使用有机发光二极管（OLED）作为光源引发光化学反应。一种新开发的利用微结构反应器的模块化光反应器系统配备了市售的OLED面板。作为表面发射体的技术特性、低厚度以及潜在的高发光效率，使得有理由期望这种光源非常适合光化学反应。通过使用光氧化反应作为基准反应来研究该反应器系统。具体而言，研究了（1）O₂的光敏[4 + 2] - 环加成反应和[2 + 2] - 环加成反应以及申克 - 烯反应。结果表明，OLED可成功用于进行光化学反应。此外，通过改变工艺条件可以提高（1）O₂的平衡浓度。基于实验研究，反应器比较表明，就生产率和效率而言，所研究的微结构光反应器目前并不优于传统的间歇式反应器。
