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Issue 2, 2014
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TREPR spectra of micelle-confined spin correlated radical pairs: I. Molecular motion and simulations

Valery F. Tarasov,a  Lauren E. Jarocha,b  Nikolai I. Avdievichb  and  Malcolm D. E. Forbes*b 
Author affiliations

* Corresponding authors

a Semenov Institute of Chemical Physics of RAS, Kosygin St. 4, Moscow 119991, Russia

b Department of Chemistry, Caudill Laboratories, CB # 3290, University of North Carolina at Chapel Hill, Chapel Hill, USA
E-mail: mdef@unc.edu

Abstract

Radical pairs created by the photoreduction of benzophenone (BP) in sodium dodecyl sulfate (SDS) micelles exhibit strong asymmetry in the line shapes of their time-resolved electron paramagnetic resonance (TREPR) signals. The asymmetry is strongly dependent on the temperature from 16 °C to 66 °C. Simulations of the anti-phase structure (APS) line shape of these spin correlated radical pairs (SCRPs), based on a numerical solution of the Stochastic Liouville Equation with the spin exchange interaction depending exponentially on the distance between radicals, are presented and discussed. The proposed model takes into account the diffusive motion of the radicals along with the motion of the transverse magnetization and accounts satisfactorily and self-consistently for the asymmetry of the observed TREPR signals.

Graphical abstract: TREPR spectra of micelle-confined spin correlated radical pairs: I. Molecular motion and simulations

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Publication details

The article was received on 15 Sep 2013, accepted on 08 Dec 2013 and first published on 09 Dec 2013


Article type: Paper
DOI: 10.1039/C3PP50328C
Citation: Photochem. Photobiol. Sci., 2014,13, 439-453
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    TREPR spectra of micelle-confined spin correlated radical pairs: I. Molecular motion and simulations

    V. F. Tarasov, L. E. Jarocha, N. I. Avdievich and M. D. E. Forbes, Photochem. Photobiol. Sci., 2014, 13, 439
    DOI: 10.1039/C3PP50328C

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