³¹P NMR Chemical Shift Anisotropy in Paramagnetic Lanthanide Phosphide Complexes.

ABSTRACT: Lanthanide (Ln) magnetic resonance imaging and chiral shift reagents generally exploit ¹H NMR shifts, as paramagnetic broadening tends to preclude the use of heavier, less sensitive nuclei. Here, we report the solution and solid-state ³¹P NMR shifts of an isostructural series of distorted trigonal bipyramidal Ln(III) tris-silylphosphide complexes, [Ln{P(SiMe₃)₂}₃(THF)₂] (1-Ln; Ln = La, Ce, Pr, Nd, Sm); 1-Ln was also characterized by elemental analysis; single-crystal and powder X-ray diffraction; multinuclear NMR, EPR, ATR-IR, and UV-vis-NIR spectroscopy; and SQUID magnetometry. Breaking assumptions, we observed paramagnetically broadened ³¹P NMR spectra for the Ln-bound P atoms for the 1-L

SUBMITTER: Baldwin J 

PROVIDER: S-EPMC11937968 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature