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)

被引：19

作者：

Burrows, Hugh D. ^{[1
]}

Costa, Diana ^{[1
,2
]}

Luisa Ramos, M. ^{[1
,3
]}

Miguel, M. da Graca ^{[1
]}

Helena Teixeira, M. ^{[1
]}

Pais, Alberto A. C. C. ^{[1
]}

Valente, Artur J. M. ^{[1
]}

Bastos, Margarida ^{[4
]}

Bai, Guangyue ^{[4
]}

机构：

[1] Univ Coimbra, Dept Quim, P-3004535 Coimbra, Portugal

[2] Univ Beira Interior, CICS, P-6201001 Covilha, Portugal

[3] Univ Coimbra, Ctr Neurociencias & Biol Celular, P-3004517 Coimbra, Portugal

[4] Univ Porto, Dept Quim & Bioquim, Fac Ciencias, P-4169007 Oporto, Portugal

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2012年 / 14卷 / 22期

关键词：

AQUEOUS-SOLUTION; HYDRATION; DNA; THERMODYNAMICS; CONDENSATION; SOLVATION; 298.15-K; DYNAMICS; EXCHANGE; ENTHALPY;

D O I：

10.1039/c2cp40480j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：7950 / 7953

页数：4

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