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Persistent URL http://purl.org/net/epubs/work/50958
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Record Id 50958
Title Solvent structure and the extended range hydration of Cr3+ in aqueous solution
Abstract H/D isotopic substitution neutron scattering has been used to investigate the short and intermediate range solution structure in a 1 m aqueous solution of chromium nitrate. To improve the reliability of the local structural information on the cation environment, information has been incorporated from available 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 method facilitates the construction of a model that is consistent with regards to both the structural details of the immediate Cr3+ aqua-ion environment and the bulk hydrogen-bonded network of solvent water molecules. The results confirm the suitability of the [Cr(H2O)6]3+ hydrated ion concept to describe the first hydration shell of this cation and clarify how this pseudomolecular unit is structurally incorporated in the longer range aqueous environment.
Keywords Chemistry , Neutron Scattering , EPSR , Solution Structure , EXAFS , Diamond Light Source
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Language English (EN)
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Journal Article J Phys Chem B 113 (2009): 11858-11864. doi:10.1021/jp904382n 2009