title: Does cation dehydration drive the binding of metal ions to polyelectrolytes in water? What we can learn from the behaviour of aluminium(III) and chromium(III).
abstract: Much stronger binding is seen in aqueous solutions between the anionic polyelectrolyte potassium poly(vinyl sulfate) and the substitution labile aluminium(III) than with the kinetically inert chromium(III). This strongly supports the idea that entropy driven water loss from the hydration sphere of the metal ion plays a major role in driving binding of the trivalent metal ion to the polyelectrolyte.
authors.affiliation: Departamento de Química, Universidade de Coimbra, 3004-535 Coimbra, Portugal. burrows@ci.uc.pt
authors.forename: Hugh D
authors.initials: HD
authors.lastname: Burrows
authors.forename: Diana
authors.initials: D
authors.lastname: Costa
authors.forename: M Luísa
authors.initials: ML
authors.lastname: Ramos
authors.forename: M da Graça
authors.initials: Mda G
authors.lastname: Miguel
authors.forename: M Helena
authors.initials: MH
authors.lastname: Teixeira
authors.forename: Alberto A C C
authors.initials: AA
authors.lastname: Pais
authors.forename: Artur J M
authors.initials: AJ
authors.lastname: Valente
authors.forename: Margarida
authors.initials: M
authors.lastname: Bastos
authors.forename: Guangyue
authors.initials: G
authors.lastname: Bai
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D011145:Polyvinyls / Q000737:chemistry*
chemical_list: D011145:Polyvinyls; D002857:Chromium; C019050:polyvinyl sulfate; D000535:Aluminum