Issue 69, 2023

Cation coordination polyhedra lead to multiple lengthscale organization in aqueous electrolytes

Abstract

Understanding multiple lengthscale correlations in the pair distribution functions (PDFs) of aq. electrolytes is a persistent challenge. Here, the coordination chemistry of polyoxoanions supports an ion-network of cation-coordination polyhedra in NaNO3(aq) and NaNO2(aq) that induce long-range solution structure. Oxygen correlations associated with Na+-coordination polyhedra have two characteristics lengthscales; 3.5–5.5 Å and 5.5–7.5 Å, the latter solely associated oligomers. The PDF contraction between 5.5–7.5 Å observed in many electrolytes is attributed to the distinct O⋯O correlation found in dimers and dimer subunits within oligomers.

Graphical abstract: Cation coordination polyhedra lead to multiple lengthscale organization in aqueous electrolytes

Supplementary files

Article information

Article type
Communication
Submitted
24 May 2023
Accepted
27 Jul 2023
First published
28 Jul 2023

Chem. Commun., 2023,59, 10400-10403

Author version available

Cation coordination polyhedra lead to multiple lengthscale organization in aqueous electrolytes

Y. Wei, E. T. Nienhuis, S. T. Mergelsberg, T. R. Graham, Q. Guo, G. K. Schenter, C. I. Pearce and A. E. Clark, Chem. Commun., 2023, 59, 10400 DOI: 10.1039/D3CC02416D

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