Pair distribution function and ⁷¹Ga NMR study of aqueous Ga³⁺ complexes.

ABSTRACT: The atomic structures, and thereby the coordination chemistry, of metal ions in aqueous solution represent a cornerstone of chemistry, since they provide first steps in rationalizing generally observed chemical information. However, accurate structural information about metal ion solution species is often surprisingly scarce. Here, the atomic structures of Ga³⁺ ion complexes were determined directly in aqueous solutions across a wide range of pH, counter anions and concentrations by X-ray pair distribution function analysis and ⁷¹Ga NMR. At low pH (<2) octahedrally coordinated gallium dominates as either monomers with a high degree of solvent ordering or as Ga-dimers. At slightly higher pH (pH ≈ 2-3) a polyoxogallate structure is identified as either Ga₃₀ o

SUBMITTER: Nielsen IG 

PROVIDER: S-EPMC8580017 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature