title: A novel approach to separating EPR lines arising from species with different transition moments.
abstract: In pulsed EPR, spectral contributions from several species in one sample can be separated based on different EPR transition probabilities. This is usually done by monitoring the Rabi nutations in a 2D experiment. By using long pulses, the FID and echo shapes of species with different transition probabilities differ significantly, including temporal shifts of the observed echo signals in a two-pulse ESE experiment. These shifts can be used to disentangle spectral components in a 1D field-swept ESE experiment by choosing an appropriate detection time. This approach is demonstrated by experiments on a sample containing Mn(2+) and Cr(3+) centers as well as on an exchange-coupled Mn(III)/Mn(IV) system with Mn(2+) contaminations.
authors.affiliation: Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, 10623 Berlin, Germany.
authors.forename: W
authors.initials: W
authors.lastname: Hofbauer
authors.forename: R
authors.initials: R
authors.lastname: Bittl
mesh_terms: D002857:Chromium / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D008345:Manganese / Q000737:chemistry*; D008433:Mathematics; D008872:Microwaves; D011208:Powders / Q000737:chemistry
chemical_list: D011208:Powders; D002857:Chromium; D008345:Manganese