ML and ML2 complex formation between Ca(II) and d-glucose derivatives in aqueous solutions

Bence Kutus, Dániel Ozsvár, Norbert Varga, I. Pálinkó, P. Sipos

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The complex formation equilibria between Ca2+ ions and six carbohydrate derivatives related to d-glucose was quantitatively characterized by potentiometry, freezing point depression and polarimetry. Complexation could not be observed for d-glucose, while weak association was deduced for d-sorbitol and d-mannitol. Stronger complexes are formed with d-gluconate and d-heptagluconate due to the presence of the carboxylate group. In addition to the plausible 1:1 species, the 1:2 species can also be detected at higher ligand to metal ratios. The ML type complex is also formed with d-glucuronate and d-glucarate. The strong association for d-gluconate and d-heptagluconate was attested by freezing point depression measurements. Polarimetric results show that for these two ligands the specific rotation of the complexed and free anions is only slightly different. The stability of the 1:1 complexes follows the order: mannitol < sorbitol < glucuronate < heptagluconate ≈ gluconate < glucarate. The formation of the ML2 type species has been established for polyhydroxy ligands having at least one carboxylate group in addition to the conformational flexibility.

Original languageEnglish
Pages (from-to)1065-1074
Number of pages10
JournalDalton Transactions
Volume46
Issue number4
DOIs
Publication statusPublished - 2017

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Glucuronic Acid
Sorbitol
Mannitol
Ligands
Derivatives
Glucose
Freezing
Association reactions
Polarimeters
Complexation
Anions
Metals
Carbohydrates
Ions
gluconic acid

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

ML and ML2 complex formation between Ca(II) and d-glucose derivatives in aqueous solutions. / Kutus, Bence; Ozsvár, Dániel; Varga, Norbert; Pálinkó, I.; Sipos, P.

In: Dalton Transactions, Vol. 46, No. 4, 2017, p. 1065-1074.

Research output: Contribution to journalArticle

Kutus, Bence ; Ozsvár, Dániel ; Varga, Norbert ; Pálinkó, I. ; Sipos, P. / ML and ML2 complex formation between Ca(II) and d-glucose derivatives in aqueous solutions. In: Dalton Transactions. 2017 ; Vol. 46, No. 4. pp. 1065-1074.
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