Intermolecular electron self exchange kinetics measured by electron paramagnetic resonance linebroadening effects: useful rate constants for the application of Marcus theory
G. Grampp, Intermolecular electron self exchange kinetics measured by electron paramagnetic resonance linebroadening effects: useful rate constants for the application of Marcus theory, SPECT ACT A, 54(14), 1998, pp. 2349-2358
Citations number
56
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
The different methods to obtain rate constants of homogeneous intermolecula
r electron-self exchange reactions in solutions from dynamic linebroadening
effects in CW-electron paramagnetic resonance (EPR) spectra are discussed
in details. The limitations of the slow and fast exchange region are explai
ned. The medium exchange region is also discussed. Experimental details are
given. The exchange rates of the 2-methyl-1,4-naphtoquinone/2-methyl-1,4-n
apthoquinone radical anion and the 1-nitronaphthalene/1-nitronaphthalene ra
dical anion redox couples are reported to 9.2 10(8) M-1 s(-1) (EtOH, 263 K)
and 1.8.10(8) M-1 s(-1) (DMF, 266 K), respectively. (C) 1998 Elsevier Scie
nce B.V. All rights reserved.