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Determination of Triplet Quantum Yaields from Triplet-Triplet Annihilation Fluorescence

机译:从三重态-三重An灭荧光测定三重态量子产率

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摘要

A new method for measuring triplet quantum yields is described and demonstrated.In this self-calibrated technique, one compares intensities of prompt fluorescence and delayed triplet-triplet annihilation fluorescence from the solution-phase sample of interest.This approach differs from other methods in that it requires no reference compounds,energy-transfer partners,or absolute measurements of triplet state energy,sample concentration,optical density,excitation energy,or emission intensity.Instead,the triplet quantum yield is determined from the emission time profile,using data from a single sample.Results from this method agree with published values to within ca.0.02,even in the unfavorable case of a weakly fluorescent sample.
机译:描述并演示了一种测量三重态量子产率的新方法。在此自校准技术中,该方法比较了目标溶液相样品中的快速荧光和延迟的三重态三重态let灭荧光的强度,该方法与其他方法的不同之处在于它不需要参考化合物,能量转移伙伴或三重态能量,样品浓度,光密度,激发能或发射强度的绝对测量值。三重态量子产率由发射时间曲线确定,使用来自即使在弱荧光样品的不利情况下,该方法的结果也与公布的值相吻合,在约0.02以内。

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