UV TALK LETTER Vol. 15

For photoreaction research, including research into photocatalysts, it is important to evaluate which light wavelengths are absorbed and how a reaction progresses (excitation wavelengths), as well as how efficiently absorbed light is used in a reaction. In photochemical reactions, the quantum yield is an indicator that shows the efficiency of how absorbed light is used for a reaction. A chemical actinometer is the device typically used to measure quantum yield. However, chemical actinometers require a substantial amount of time and labor to be able to quantify the quantum yield. Shimadzu has developed the QYM-01 photoreaction quantum yield evaluation system, which is capable of calculating quantum yield through an easier procedure and with more accuracy compared to a chemical actinometer. Note there exists both a photoreaction quantum yield and a fluorescence quantum yield, and the QYM-01 measures the photoreaction quantum yield.