Effects of polydispersity on fluorescence quenching in micelles
Effects of polydispersity on fluorescence quenching in micelles
复制标题
多分散性对胶束荧光猝灭的影响
DOI：
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发表时间：
1982
期刊：
影响因子：
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通讯作者：
J. Löfroth
中科院分区：
文献类型：
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作者：
M. Almgren;J. Löfroth
从理论上讨论了多分散性对胶束体系中荧光猝灭的影响。对计算机生成的多分散胶束系统中猝灭的荧光衰减数据进行了测试。结果表明，估计的参数，即聚集数和速率常数，高度依赖于胶束尺寸分布以及增溶物-胶束系统的动态特性。考虑两种极端情况：一种是静态情况，即在停留时间内胶束的尺寸没有发生变化；另一种是动态情况，即发生非常大的尺寸变化。在静态情况下，在猝灭剂浓度为零的限度内，估计的聚集数将随着猝灭剂浓度的增加而从重均聚集数减少。在动态情况下，获得数均聚集数，与猝灭剂浓度无关。初始衰减常数包含有关聚合数的信息，并且在生成的数据中，这可以...
The effects of polydispersity on fluorescence quenching in micelle systems are discussed theoretically. Predictions are tested on computer generated fluorescence decay data for quenching in polydisperse micelle systems. It is shown that the estimated parameters, i.e, aggregation numbers and rate constants, are highly dependent on the micelle size distribution, and on the dynamic properties of the solubilizate–micelle system. Two extreme cases are considered: a static one, where no size changes of the micelles occur during the residence time, and a dynamic one where very large size variations take place. In the static case, the estimated aggregation number will decrease with quencher concentration from the weight average aggregation number in the limit of zero quencher concentration. In the dynamic case, the number average aggregation number is obtained, independent of quencher concentration. The initial decay constant contains information about the aggregation numbers, and in the generated data, this coul...