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Issue 13, 2017
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Combined static and dynamic quenching in micellar systems—closed-form integrated rate laws verified using a versatile probe

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Abstract

We demonstrate that the 3-aminoperylene radical cation is a near-ideal probe for investigating kinetic and transport processes in SDS micellar systems. Its isolated generation by two-photon ionization at a wavelength where most quenchers are transparent (532 nm) is free from side reactions; no exit from the micelles is detectable on a millisecond timescale; and its unquenched lifetime is as long as 350 ms, thus allowing the study of quenching processes over a time frame spanning at least 7 orders of magnitude. The lipophilic antioxidant ascorbyl palmitate reconverts it to its parent compound through the interplay of static and fast dynamic intramicellar quenching as well as through subsequent slow intermicellar migration. Using this radical-cation probe, we have successfully validated closed-form expressions which we derived for the probe decay in all these situations. From these functions, we also obtained an exact and closed-form analytical result for Stern–Volmer experiments with combined static and dynamic intramicellar quenching.

Graphical abstract: Combined static and dynamic quenching in micellar systems—closed-form integrated rate laws verified using a versatile probe

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Publication details

The article was received on 12 Dec 2016, accepted on 01 Mar 2017, published on 01 Mar 2017 and first published online on 01 Mar 2017


Article type: Paper
DOI: 10.1039/C6CP08491E
Citation: Phys. Chem. Chem. Phys., 2017,19, 8735-8741
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    Combined static and dynamic quenching in micellar systems—closed-form integrated rate laws verified using a versatile probe

    T. Kohlmann, R. Naumann, C. Kerzig and M. Goez, Phys. Chem. Chem. Phys., 2017, 19, 8735
    DOI: 10.1039/C6CP08491E

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