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Abstract Title:

Radio frequency magnetic field effects on a radical recombination reaction: a diagnostic test for the radical pair mechanism.

Abstract Source:

J Am Chem Soc. 2004 Jul 7 ;126(26):8102-3. PMID: 15225036

Abstract Author(s):

Kevin B Henbest, Philipp Kukura, Christopher T Rodgers, P J Hore, Christiane R Timmel

Article Affiliation:

Kevin B Henbest

Abstract:

The photoinduced electron-transfer reaction of chrysene with isomers of dicyanobenzene is used to demonstrate the sensitivity of a radical recombination reaction to the orientation and frequency (5-50 MHz) of a approximately 300 muT radio frequency magnetic field in the presence of a 0-4 mT static magnetic field. The recombination yield is detected via the fluorescence of the exciplex formed exclusively from the electronic singlet state of the radical ion pair Chr*+/DCB*-. Magnetic field effects are simulated using a modified version of the gamma-COMPUTE algorithm, devised for the simulation of magic angle spinning NMR spectra of powdered samples. The response of a chemical or biological system to simultaneously applied radio frequency and static or extremely low-frequency magnetic fields could form the basis for a diagnostic test for the operation of the radical pair mechanism that would not require prior knowledge of the nature and properties of the radical reaction.

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Sayer Ji
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