Unlike high-field DNP-enhanced solid- state NMR experiments, ODNP experiments at 9 GHz do not require a large superconducting NMR magnet or a high-power/high-frequency microwave source such as a gyrotron. In fact, any X-band EPR spectrometer can be easily upgraded with Bridge12 products for ODNP spectroscopy.
The Bridge12 ODNP probe can be easily installed in a conventional X-band EPR cavity (e.g. Bruker 4102ST or Varian E231) and it comes with all necessary adapter parts to mount the probe. The positions of the NMR coil wires are optimized and the Q of the EPR cavity is only minimally affected. This conserves the high conversion factor of the EPR probe and minimizes sample heating even when using very high microwave power.
The Bridge12 ODNP probe has a simple and convenient system to change the sample. Once the probe is mounted inside the EPR cavity and its position is optimized the probe will stay inside the EPR cavity and the probe does not have to be removed to change the sample. The sample can be loaded either into a quartz sample tube (2 mm OD, 1 mm ID) or into a small sample capillary (0.84 mm OD, 0.6 mm ID). The probe comes with sample holders for both options.
The Bridge12 ODNP probe is a single channel NMR probe. Depending on your application the probe can be tuned to observe 1H, 19F, 2H, 13C or any other nucleus you are interested in.
All RF tuning elements are conveniently located at the front of the probe. That makes it very easy to tune the probe to a new frequency and for example DNP enhancement profiles are recorded in a very short amount of time.