Pyrene-viologen complexes in SDS micelles: quenching parameters and use as probes of aggregation numbers.,Photochemical & Photobiological Sciences

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Pyrene-viologen complexes in SDS micelles: quenching parameters and use as probes of aggregation numbers.
Photochemical & Photobiological Sciences ( IF 2.7 ) Pub Date : 2019-12-18 , DOI: 10.1039/c9pp00439d
Tim Kohlmann ₁ , Martin Goez ₁

Affiliation

Through a formal-kinetic treatment, we rigorously derive the micellar occupations in the presence of fluorophore-quencher ground-state complexes and the resulting expressions for the time-dependent and stationary observables in the case of combined static and dynamic quenching. We present a protocol for data analysis that effectively isolates the processes, thereby ensuring rapid fit convergence and unique parameter sets. By this approach, we interpret time-resolved fluorescence measurements on pyrene quenched by a homologous series of viologens in SDS micelles. The dynamic intramicellar quenching is diffusion limited; and the formation of the ground-state complexes is entropy driven, with a constant increment per methylene group in the viologen sidechains. The micellar aggregation numbers are obtained with a precision comparable to neutron scattering, including their temperature dependence.

中文翻译：

SDS胶束中的-紫精复合物：淬灭参数，用作聚集数探针。

通过正式的动力学处理，我们在存在荧光团-猝灭基态复合物的情况下，严格推导了胶束占据，并且在静态和动态猝灭相结合的情况下，得出了时间依赖性和静态可观观测值的表达式。我们提出了一种用于数据分析的协议，该协议可以有效地隔离流程，从而确保快速拟合收敛和唯一的参数集。通过这种方法，我们解释了在SDS胶束中由一系列紫精同素淬灭后的pyr的时间分辨荧光测量结果。动态的胶束内淬灭是扩散受限的；基态络合物的形成是由熵驱动的，紫精侧链中的每个亚甲基基团都有一个恒定的增量。

更新日期：2020-02-13

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