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Recent advances in the aqueous chemistry of the calcium(II)-gluconate system – Equilibria, structure and composition of the complexes forming in neutral and in alkaline solutions

Kutus, B.; Gaona, X.; Pallagi, A.; Pálinkó, I.; Altmaier, M.; Sipos, P.

Abstract:
Of the sugar carboxylates, D-gluconate is clearly the most significant representative: the world’s annual production of this organic compound is estimated to be in the order of 10$^{5}$ tonnes. The reason of its mass production is due to its outstandingly broad range of practical (medical, pharmaceutical, industrial, etc.) applications. D-gluconate is a well-known and exceptionally popular complexing agent; accordingly, it has been the subject of a large number of coordination chemical research investigations. Its complexation properties are specially remarkable in alkaline to hyperalkaline pH conditions, where the deprotonation of one or more of its alcoholic OH groups provides a favourable frame for the formation of very stable chelate complexes with a large variety of metal cations. With the aim to show the state of the art of some relevant issues in the aqueous chemistry of the D-gluconate ion, the current paper focusses on the acidbase properties and calcium(II) complexation of the compound encompassing the entire experimentally available pH-range in water. The accessible literature on the deprotonation of carboxylic and alcoholic OH groups is collected and critically evaluated. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000120549
Veröffentlicht am 28.06.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nukleare Entsorgung (INE)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 15.08.2020
Sprache Englisch
Identifikator ISSN: 0010-8545, 1873-3840
KITopen-ID: 1000120549
Erschienen in Coordination chemistry reviews
Band 417
Seiten Art. Nr.: 213337
Schlagwörter Gluconic acid, Gluconate, Calcium, Complex formation, Solution structure, Equilibrium constants and thermodynamics, Lactonization, Acid-base equilibria, Hyperalkaline solutions
Nachgewiesen in Web of Science
Scopus
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