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Aqueous Sulfate Separation by Crystallization of Sulfate–Water Clusters
Author(s) -
Custelcean Radu,
Williams Neil J.,
Seipp Charles A.
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201506314
Subject(s) - sulfate , crystallization , aqueous solution , chemistry , ligand (biochemistry) , water of crystallization , condensation , inorganic chemistry , organic chemistry , receptor , biochemistry , thermodynamics , physics
An effective approach to sulfate separation from aqueous solutions is based on the crystallization of extended [SO 4 (H 2 O) 5 2− ] n sulfate–water clusters with a bis(guanidinium) ligand. The ligand was generated in situ by hydrazone condensation in water, thereby bypassing the need for elaborate syntheses, tedious purifications, and organic solvents. Crystallization of sulfate–water clusters represents an alternative approach to the now established sulfate separation strategies that involve encapsulation of the “naked” anion.