A solution study on the ability of some derivatised sugars [glucuronic acid (GluA), galacturonic acid (GalA) and glucosaminic acid (GlNA)] to complex the Hg(II) ion is reported. The stability constants of the complex species were determined by potentiometric measurements while H-1 NMR experiments allow to define the coordination sites of sugar molecules. GluA coordinates the metal ion through the carboxylic oxygen and the O-4 hydroxyl group and is found to form more stable complexes with respect to GalA in which metal ligation is from the carboxylic oxygen and the O-5 ring oxygen. GlNA forms stable complexes chelating Hg(II) ion through carboxylic oxygen and the a-amino group. The ternary 2,2´-bipyridine containing systems were also investigated by means of potentiometric studies. The ML2 complexes were also isolated in the solid state and characterised by IR spectroscopy.

Hg(II)-coordination by sugar-acids: Role of the hydroxy groups / Ferrari, Erika; Grandi, Romano; Lazzari, Sandra; Saladini, Monica. - In: JOURNAL OF INORGANIC BIOCHEMISTRY. - ISSN 0162-0134. - STAMPA. - 99:12(2005), pp. 2381-2386. [10.1016/j.jinorgbio.2005.09.005]

Hg(II)-coordination by sugar-acids: Role of the hydroxy groups

FERRARI, Erika;GRANDI, Romano;LAZZARI, Sandra;SALADINI, Monica
2005

Abstract

A solution study on the ability of some derivatised sugars [glucuronic acid (GluA), galacturonic acid (GalA) and glucosaminic acid (GlNA)] to complex the Hg(II) ion is reported. The stability constants of the complex species were determined by potentiometric measurements while H-1 NMR experiments allow to define the coordination sites of sugar molecules. GluA coordinates the metal ion through the carboxylic oxygen and the O-4 hydroxyl group and is found to form more stable complexes with respect to GalA in which metal ligation is from the carboxylic oxygen and the O-5 ring oxygen. GlNA forms stable complexes chelating Hg(II) ion through carboxylic oxygen and the a-amino group. The ternary 2,2´-bipyridine containing systems were also investigated by means of potentiometric studies. The ML2 complexes were also isolated in the solid state and characterised by IR spectroscopy.
2005
99
12
2381
2386
Hg(II)-coordination by sugar-acids: Role of the hydroxy groups / Ferrari, Erika; Grandi, Romano; Lazzari, Sandra; Saladini, Monica. - In: JOURNAL OF INORGANIC BIOCHEMISTRY. - ISSN 0162-0134. - STAMPA. - 99:12(2005), pp. 2381-2386. [10.1016/j.jinorgbio.2005.09.005]
Ferrari, Erika; Grandi, Romano; Lazzari, Sandra; Saladini, Monica
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/310650
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