Magnetic Resonance (Aug 2024)

<sup>1</sup>H-enhanced <sup>103</sup>Rh NMR spectroscopy and relaxometry of <sup>103</sup>Rh(acac)<sub>3</sub> in solution

  • H. Harbor-Collins,
  • M. Sabba,
  • M. Leutzsch,
  • M. H. Levitt

DOI
https://doi.org/10.5194/mr-5-121-2024
Journal volume & issue
Vol. 5
pp. 121 – 129

Abstract

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Recently developed polarisation transfer techniques are applied to the 103Rh nuclear magnetic resonance (NMR) of the 103Rh(acac)3 coordination complex in solution. Four-bond 1H–103Rh J couplings of around 0.39 Hz are exploited to enhance the 103Rh NMR signal and to estimate the 103Rh T1 and T2 relaxation times as a function of field and temperature. The 103Rh longitudinal T1 relaxation in 103Rh(acac)3 is shown to be dominated by the spin–rotation mechanism, with an additional field-dependent contribution from the 103Rh chemical shift anisotropy.