Laboratory apparatus for the accurate, facile and rapid determination of visible light photoreaction quantum yields
Laboratory apparatus for the accurate, facile and rapid determination of visible light photoreaction quantum yields
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DOI：
10.1039/c0pp00195c
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发表时间：
2010-01-01
影响因子：
3.1
通讯作者：
Riedle, Eberhard
中科院分区：
文献类型：
--
作者：
Megerle, Uwe;Lechner, Robert;Riedle, Eberhard
报道了一种直接测定光催化和光化学过程量子产率的新装置。它将光吸收量的光电测量与产品的定量化学分析相结合。高功率可见光LED被发现是用于照明的方便光源，而不需要光谱滤波。LED输出可以有效地以受控方式成像到样品中。剩余的透射光由专用和校准的太阳能电池连续监测。该装置可在化学合成实验室的条件下使用。提供了器械组装和操作所需的所有信息。通过与标准化学光辐射测量法的比较以及通过测定其他人报告的反应和我们自己实验室研究的反应的量子产率来验证性能。
A novel setup for the direct determination of the quantum yield in photocatalytic and photochemical processes is reported. It combines the opto-electronic measurement of the absorbed amount of light with established quantitative chemical analysis of the products. High power visible LEDs are found to be convenient light sources for the illumination without the need for spectral filtering. The LED output can be imaged efficiently and in a controlled fashion into the sample. The residual transmitted light is continuously monitored by a dedicated and calibrated solar cell. The setup can be used under the conditions of a chemical synthesis laboratory. All information needed for the assembly and operation of the device is made available. The performance is validated by comparison to standard chemical actinometry and by the determination of quantum yields for reactions reported by others and ones investigated in our own laboratory.