Ferro- and antiferromagnetic exchange coupling constants in PELDOR spectra

D Margraf, P. Cekan, T.F. Prisner, S.Th. Sigurdsson*, Olav Schiemann

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

Pulsed electron electron double resonance (PELDOR) is a well-established method for measuring nanometer distances between paramagnetic centres. Here, we demonstrate on three rigid and conjugated biradicals how the presence of an exchange coupling constant J and its distribtion DJ influences PELDOR data and its analysis. In principle two combinations of J and D fulfill the experimental data in each case. The correct one, including the sign of J, can be determined via simulations in case the two halves of the Pake pattern are separated enough.

Original languageEnglish
Pages (from-to)6708-6714
Number of pages7
JournalPhysical Chemistry Chemical Physics
Volume11
DOIs
Publication statusPublished - 2009

Keywords

  • ELECTRON DOUBLE-RESONANCE
  • PULSED ELECTRON
  • CONFORMATIONAL FLEXIBILITY
  • RIBONUCLEOTIDE REDUCTASE
  • DISTANCE DISTRIBUTIONS
  • DISORDERED SOLIDS
  • EPR SPECTROSCOPY
  • RADICAL PAIRS
  • SPIN-ECHO
  • ORIENTATION

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