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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Use of Isosbestic Points for Determination of Quantum Efficiency in Transient Absorption Spectroscopy
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Use of Isosbestic Points for Determination of Quantum Efficiency in Transient Absorption Spectroscopy

机译:利用等吸收点确定瞬态吸收光谱中的量子效率

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摘要

Isosbestic points in the transient absorption spectrum for an intermolecular photoinduced electron-transfer system (PET) (bis-(diphenylamino)diphenylbutadiene plus C_(70)in dilute solutions) are observed. An analytical treatment of these points indicate that they are a measure of the quantum efficiency for the PET process. Variation of parameters that affect PET quantum efficiency, such as solvent polarity and photoinitiator lifetime, result in predicted frequency shifts of the isosbestic point. Comparison to established methods of determination of quantum efficiency indicates that the method is quantitatively reliable as well as qualitatively useful. Application of the methodology to other systems is discussed.
机译:观察到瞬态吸收光谱中的分子间光致电子转移系统(PET)(稀溶液中的双(二苯基氨基)二苯基丁二烯加C_(70))的等吸收点。对这些点的分析处理表明,它们是PET工艺的量子效率的量度。影响PET量子效率的参数的变化(例如溶剂极性和光引发剂的寿命)会导致预测的等吸收点的频移。与确定的量子效率确定方法的比较表明,该方法在定量上可靠,在质量上也有用。讨论了该方法在其他系统上的应用。

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