Multinuclear NMR study of lanthanide(III) complexes of 1,2-PDTA in aqueous solution

Autor:	Fei Li, Rui‐Fang Song, Cun‐Zhi Zhang, Shi‐Ying Hua
Rok vydání:	2010
Předmět:	Lanthanide Coordination sphere Aqueous solution Ligand Chemistry Inorganic chemistry medicine General Chemistry Chloride medicine.drug Ion
Zdroj:	Chinese Journal of Chemistry. 11:59-65
ISSN:	1001-604X
DOI:	10.1002/cjoc.19930110109
Popis:	The complexation of lanthanide(III) cations with 1,2-propanediaminetetraacetate (1,2-PDTA) in aqueous solution has been investigated by 10Na, 35Cl, 2H and 11O NMR shift measurements. It has been shown that the contact shifts are dominant for 17O, 16Cl and 2H (only for the heavier lanthanide series) and the pseudocontact shifts are dominant for 25Na. It is suggested that the 1,2-PDTA ligand is bound pentadentately via the two nitrogens and the three carboxylates for the lighter lanthanide complexes, hexdentately via the two nitrogens and the four carboxylates for the heavier ones. The numbers of the water coordinated were determined. The small amount of chloride anion in inner coordination sphere was observed.
Databáze:	OpenAIRE
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