Abstract
The problem of proton magnetic resonance linewidths for molecules that are taking part in one electron transfer reactions is re-examined, and it is concluded that the ``weak-pulse'' limit (aHτp≪1) is more generally applicable than the ``strong-pulse'' limit (aHτp≫1) that was discussed by McConnell and Berger. Density matrix equations are set up using the formalism of Alexander in order to calculate line shapes from the hyperfine splitting constants and the lifetimes of the diamagnetic and paramagnetic species; and it is shown that when more than one absorption line are observed, under certain conditions, the bimolecular rate constant for electron transfer may be determined without a knowledge of the concentration of unpaired electrons. These equations are applied to the electron transfer reaction between NNN′N′-tetramethyl-p-phenylene diamine and its monocation radical in acetonitrile, and we find that the rate constant for electron transfer is (2.0±1.0)×108 liter mole−1 sec−1.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
