Lead‐207 NMR spectroscopy at 1.4 T: Application of benchtop instrumentation to a challenging I = ½ nucleus

• Author(s) / Creator(s)

  • Bernard, G.M.
  • Michaelis, V.K.

• The practicality of obtaining liquid‐ and solid‐state 207Pb nuclear magnetic resonance (NMR) spectra with a low permanent‐field magnet is investigated. Obtaining 207Pb NMR spectra of salts in solution is shown to be viable for samples as dilute as 0.05 M. The concentration dependence of the 207Pb chemical shifts for lead nitrate was investigated; the results are comparable with those obtained with high‐field instruments. Likewise, the isotope effect of substituting D2O for H2O as the solvent was investigated and found to be comparable with those reported previously. Obtaining solid‐state 207Pb NMR spectra is challenging, but we demonstrate the ability to obtain such spectra for three unique solid samples. An axially symmetric 207Pb powder pattern for lead nitrate and the powder pattern expected for lead chloride reveal linewidths dominated by shielding anisotropy, while 207Pb‐35/37Cl J‐coupling dominates in the methylammonium lead chloride perovskite material. Finally, recent innovations and the future potential of the instruments are considered.

• Date created

  2020-01-01

• Subjects / Keywords

  • NMR
  • low-field
  • Lead-207
  • perovskite

• Type of Item

  Article (Draft / Submitted)

• DOI

  https://doi.org/10.7939/r3-mghp-6a73

• License

  Attribution-NonCommercial 4.0 International