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6930721 
Journal Article 
A New and Robust Method for In-situ EPR Electrochemistry 
Toybenshlak, M; Carmieli, R; , 
2019 
1 
Israel Journal of Chemistry
ISSN: 0021-2148
EISSN: 1869-5868 
WILEY-V C H VERLAG GMBH 
WEINHEIM 
59 
11-12 
1020-1026 
English 
WOS:000484430400001 
A new and simple design of electrochemical setup for in-situ generation of free radicals to be measured using X-band (9.5 GHz) electron paramagnetic resonance (EPR) spectrometer is described. The cell parts are all from commercially available components and requires no specially made glassware. The EPR performance of the setup is demonstrated by in-situ electrochemical generation of organic radical cations and radical anions such as quinones, perylene-diimide, pyrene, flavin, tryptophan and tyrosine through oxidation or reduction in solution. The well-resolved EPR spectra of the radical products were simulated and analyzed and the hyperfine coupling constants have been assigned for the interactions of the unpaired electron with the various ring protons and the nitrogen nuclei. 
Electron paramagnetic resonance (EPR); in-situ electrochemistry; radical ions and paramagnetic intermediates