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:(2005), pp. 2381-2386.

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.
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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:(2005), pp. 2381-2386.
Ferrari, Erika; Grandi, Romano; Lazzari, Sandra; Saladini, Monica
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/310650
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