Dynamic Nuclear Polarization

Dynamic Nuclear Polarization (DNP) results from the transfer of spin polarization from electrons to nuclei by Overhauser effect in solution, solid effect with mixing of spin-states and spontaneous cross-relaxation/thermal mixing. The latter is the dominant mechanism for observing DNP signal at high field. The polarization of the electrons can be enhanced by continuous microwave irradiation with energy at EPR frequencies. Significant sensitivity gains are expected from DNP enhancements in solid state NMR experiments with applications in biological solids and materials science.


  • Bruker Ascend 600 MHz Wide Bore Compact Magnet, 395 GHz high powered Gyrotron System for microwave generation.
  • Polarization enhancement yields factor up to 80 gain in sensitivity for solid-state NMR
  • Optimized microwave beam propagation to the sample ensured by special transmission lines.
  • AVANCE III HD console with Topspin 3.1.
  • Low Temperature (LT) MAS Probe (~100K) with cold sample coil and RF Circuit.
  • Wide bore 3.2 mm triple resonance HCN probe, 3.2 mm HCND probe for observing quadrupolar nuclei and 1.9 mm HCN probe.
  • Designed for long term stability.
  • 6,000 gallon bulk nitrogen tank for continuous operation of the LT MAS Probe

Bruker 600 MHz DNP-NMR with 395 GHz Gyrotron, LT-MAS Probe