Unexpected temperature dependence of ¹H paramagnetic shift in MAS NMR of nickelocene.

ABSTRACT: This work revisits the temperature dependence of ¹H paramagnetic shift in nickelocene as a potential nuclear magnetic resonance (NMR) thermometer under fast magic angle spinning (MAS) rate. Surprisingly, an abnormal temperature dependence of ¹H paramagnetic shift has been observed. In addition to a 1/T dependence term, a 1/T ² dependence term must be included to correctly describe the curvature behavior of the δ _{¹ H}-T correlation under fast MAS rate.

SUBMITTER: Jiang X 

PROVIDER: S-EPMC12406514 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature