The first high-pressure high-resolution NMR probe for a normal bore cryomagnet¹

Abstract

We describe a high-pressure high-resolution NMR probe fitting into a 4.7 Tesla normal bore (50 mm Ø) cryomagnet used with a Bruker AC-200 spectrometer. The probe is designed for a pressure range from 0.1 to 200 MPa and can be used in a temperature domain from -50 to + 120°C. Eguipped with a double tuned frequeney adapter circuit the probe is used for ¹H (200 MHz) observation and ²H (30.7 MHz) field locking for easy homogeneity adjustment. The resolution obtained routinely is better than 1 Hz (< 5′10⁻⁹). Other frequencies, e.g. 27.1 MHz for ¹⁷O observation, can easily be obtained by changing and according the frequency adapter box.

Key Words:

• High pressure high-resolution NMR probe
• proton NMR
• multinuclear NMR