1 research outputs found
l‑Alanine/Nickel-Induced Size Sorting of Lanthanide(III) Ions in 4f–4f′ Heterometallic Complexes
A versatile
approach to create a novel class of mixed-lanthanide
compounds with predetermined locations of different lanthanides in
cationic and anionic positions has been developed. Pure 4f–4f′
heterometallic complexes were constructed from two independent building
blocks: the complex cation [LnÂ{NiÂ(ala)<sub>2</sub>}<sub>6</sub>]<sup>3+</sup> (ala = l-alaninate), which can be formed by La<sup>3+</sup>, Ce<sup>3+</sup>, Pr<sup>3+</sup>, and Nd<sup>3+</sup> exclusively,
and the anion [GdÂ(NO<sub>3</sub>)<sub>3</sub>(OH)<sub>3</sub>(H<sub>2</sub>O)]<sup>3–</sup>. The compositions and structures of
the complexes were studied by X-ray crystallography, energy-dispersive
X-ray spectroscopy, and inductively coupled plasma mass spectrometry.
The X-ray structural analysis showed the high rigidity of the l-alanine/NiÂ(II) supramolecular unit in the complex cations,
which affected immediately its selectivity toward certain lanthanides