Solvation Structure and Ion Complexation of La3+ in a 1 Molal Aqueous Solution of Lanthanum Chloride

Citations Over TimeTop 10% of 2011 papers

Abstract

H/D isotopic substitution neutron scattering and X-ray scattering have been used to investigate the short and intermediate range solution structure in a 1 m aqueous solution of lanthanum chloride. To improve the reliability of the local structural information on the cation environment, information has been incorporated from Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy data into the applied analytical framework. The markedly different structural sensitivities of the experimental probes allow the construction of a detailed three-dimensional atomistic model using the Empirical Potential Structure Refinement (EPSR) technique. The results show that at the investigated concentration La(3+) is hydrated by eight water molecules and one chloride ion, forming an inner-sphere ion complex in which the water molecules maintain angular configurations consistent with a tricapped trigonal prism configuration. This local geometry considerably disrupts the bulk solvent structure.

Related Papers

• → Dynamics of Water Molecules in Aqueous Solvation Shells(2001)460 cited
• → Ferric Chloride Complexes in Aqueous Solution: An EXAFS Study(2018)59 cited
• → Solvation Structure of Ions in Water(2007)29 cited
• → Stability and structure of formamide and urea dimers in aqueous solution. A theoretical study(1989)48 cited
• → The Influence of Salts on the Absorption Spectra of Aqueous Cobalt Chloride Solutions(1938)2 cited