Multiple-quantum ESR and distance measurements

  title={Multiple-quantum ESR and distance measurements},
  author={Petr P. Borbat and Jack H. Freed},
Ž . It is shown that allowed double-quantum coherences DQC can now be routinely generated in disordered and oriented solids containing nitroxide biradicals and random distributions of stable radicals. The Pake doublets obtained from DQC ̊ Ž . pathways can be effectively used to determine long ;30 A distances in the former case, and concentrations in the latter. The DQC signals are strong and often comparable to standard single-quantum signals. In the limit of non-selective pulses their… CONTINUE READING