J. Wu et al., Synthesis, properties and magnetic resonance spectra of new rare earth complexes with noncyclic polyether-glycylglycine Schiff base, ACT CHIM S, 59(8), 2001, pp. 1290-1293
Six novel rare earth complexes with noncyclic polyether-glycylglycine Schif
f base (TAGLGL) have been synthesized with "step by step" method. They were
confirmed by elemental analysis, IR, etc. and their formulas were establis
hed as [Ln(3)(TAGLGL) (NO3)(7)]. 4H(2)O (Ln = La, Nd, Sm, Gd, Yb, Y). Owing
to introducing a dipeptide bond with C=N and HN-C=O groups in the ligand,
H-1 NMR and solid high resolution C-13 NMR with CPMAS and TOSS techniques a
nd EPR spectra were used for elucidating the crystal field strength, the sy
mmetry in the obtained Gd( III) complex and the coordination of the donor a
toms of the ligand with rare earth elements.