title: Frequency-switching inversion-recovery for severely hyperfine-shifted NMR: evidence of asymmetric electron relaxation in high-spin Co(II).
abstract: A new method for reliably measuring longitudinal relaxation rates for severely hyperfine-shifted NMR signals in aqueous solutions is presented. The method is illustrated for a well-defined cobalt tetracysteinate, with relevance to cobalt-substituted metalloproteins. The relaxation measurements are indicative of asymmetric electronic relaxation of the high-spin Co(II) ion.
authors.affiliation: Department of Chemistry, University of New Mexico, Albuquerque, New Mexico 87131, USA.
authors.forename: Erin A
authors.initials: EA
authors.lastname: Riley
authors.forename: Amy K
authors.initials: AK
authors.lastname: Petros
authors.forename: Karen Ann
authors.initials: KA
authors.lastname: Smith
authors.forename: Brian R
authors.initials: BR
authors.lastname: Gibney
authors.forename: David L
authors.initials: DL
authors.lastname: Tierney