Modernization of a Photochemical Reaction for the Undergraduate Laboratory: Continuous Flow Photopinacol Coupling,Journal of Chemical Education

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Modernization of a Photochemical Reaction for the Undergraduate Laboratory: Continuous Flow Photopinacol Coupling
Journal of Chemical Education ( IF 2.5 ) Pub Date : 2019-12-18 , DOI: 10.1021/acs.jchemed.9b00628
Kate Volpe ₁ , Erin E. Podlesny ₁

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A continuous flow photopinacol coupling of benzophenone has been developed and implemented in the undergraduate laboratory. This photoreduction was accomplished using 2-propanol as an H atom donor and cosolvent in the reaction. The simple and inexpensive UV light source and flow reactor design (less than $350/photochemical flow system) provide an operationally accessible experiment. Students successfully compared the efficiencies (percentage conversion) of both flow and batch methods and explored fundamental continuous flow concepts to explain how and why continuous flow can improve the efficiency of a photochemical reaction. The percentage conversions for the flow reactions (average 82%) were more than 8 times higher than the batch reactions, based on irradiation of equal reaction volumes for 10 min.

中文翻译：

现代化光化学反应的本科实验室：连续流光频哪醇偶联。

苯甲酮的连续流动光频哪醇偶联已在大学实验室中开发和实施。使用2-丙醇作为H原子供体和反应中的助溶剂来完成该光还原。简单且便宜的紫外光源和流动反应器设计（少于350美元/光化学流动系统）提供了可操作的实验。学生成功地比较了流法和分批法的效率（转化率），并探索了基本的连续流概念，以解释连续流如何以及为什么可以提高光化学反应的效率。基于等体积反应10分钟，流式反应的转化率（平均82％）比分批反应高出8倍以上。

更新日期：2019-12-19

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