Intermolecular electron self exchange kinetics measured by electron paramagnetic resonance linebroadening effects: useful rate constants for the application of Marcus theory

Authors
Grampp, G
Citation
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
ISSN journal
13861425 → ACNP
Volume
54
Issue
14
Year of publication
1998
Pages
2349 - 2358
Database
ISI
SICI code
1386-1425(199812)54:14<2349:IESEKM>2.0.ZU;2-X
Abstract
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.