Multinuclear NMR study of lanthanide (III) complexes of diethylenetriaminepentaacetate

Journal Article · Wed Dec 14 04:00:00 EST 1988 · Inorganic Chemistry; (USA)

DOI:https://doi.org/10.1021/ic00299a003· OSTI ID:5447897

Peters, J A ^[1]

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1. Delft Univ. of Technology (Netherlands)

The complexation of lanthanide (III) cations with diethylenetriaminepentaacetate (DTPA) in the presence of lithium as counterion in aqueous solution has been investigated with the use of {sup 13}C, {sup 17}O, and {sup 6}Li NMR shift and relaxation measurements. The data show that the DTPA ligand is bound octadentately via the three nitrogens and the fine carboxylates. Conformational interconversions, taking place in the DTPA ligand, give rise to exchange broadening in the {sup 13}C and {sup 1}H NMR spectra. The first coordination sphere is completed by one water, while two lithium counterions are present in the second coordination sphere. The counterions are probably exchanging between the various carboxylate groups.

• OSTI ID: 5447897
• Journal Information: Inorganic Chemistry; (USA), Journal Name: Inorganic Chemistry; (USA) Vol. 27:25; ISSN 0020-1669; ISSN INOCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400101* -- Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures
400201 -- Chemical & Physicochemical Properties
ALKALI METAL ISOTOPES
CARBON 13
CARBON ISOTOPES
CHEMICAL BONDS
CHEMICAL SHIFT
COMPLEXES
DISPERSIONS
EVEN-ODD NUCLEI
ION EXCHANGE
IONIC COMPOSITION
ISOTOPE RATIO
ISOTOPES
LIGANDS
LIGHT NUCLEI
LITHIUM 6
LITHIUM ISOTOPES
MAGNETIC RESONANCE
MATHEMATICAL MODELS
MIXTURES
MOLECULAR MODELS
MOLECULAR STRUCTURE
NUCLEAR MAGNETIC RESONANCE
NUCLEI
ODD-ODD NUCLEI
OXYGEN 17
OXYGEN ISOTOPES
RARE EARTH COMPLEXES
RESONANCE
SOLUTIONS
STABLE ISOTOPES
STRUCTURAL CHEMICAL ANALYSIS