Hardware modification of a 7 mm MAS NMR probe to a single-crystal goniometer

Solid State Nuclear Magnetic Resonance
Gábor Kovács, János Rohonczy

Abstract

Tensorial terms of the Hamiltonian can be measured by solid-state single-crystal nuclear magnetic resonance (NMR) spectroscopy which requires a goniometer NMR probehead. Goniometer probes; however, are not standard parts of solid NMR spectrometers and are available only at a much higher price than magic-angle spinning (MAS) probeheads widely used in research. Due to requirements of MAS experiments, modern probeheads are designed for small ceramic rotors, which are 1-4 mm in diameter, to reach very high angular frequencies, so there are several older 7 mm MAS probeheads used rarely todays in NMR laboratories. In this paper, a simple method is presented how to rebuild step-by-step a 7 mm Bruker MAS probehead to be suitable for single-crystal spectroscopy. In the second part (31)P chemical shift tensors of Na(4)P(2)O(7) x 10H(2)O are determined to demonstrate the functionality of the rebuilt probehead.

Citations

Mar 2, 2016·Solid State Nuclear Magnetic Resonance·Bálint Koczor, János Rohonczy
Jun 4, 2021·Progress in Nuclear Magnetic Resonance Spectroscopy·Thomas Vosegaard

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