Negative chelate complexes of lanthanide and actinide elements

Holm, L.W.; Choppin, Gregory R.; Moy, David

doi:10.1016/0022-1902(61)80114-0

Cited by 28 publications

(8 citation statements)

References 6 publications

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“…The eluted complex must be neutral, or singly charged. By Potentiometrie measurements [19], and by the combined use of cation and anion exchangers [20], it was shown that the ahydroxycarboxylates of the trivalent lanthanide and actinide ions are of the type [M'"L4]". The central ion then has a coordination number of eight.…”

Section: A-hib Separationsmentioning

confidence: 99%

Chemical Properties of Element 105 in Aqueous Solution: Cation Exchange Separations with α-Hydroxyisobutyric Acid

Schädel¹,

Brächte²,

Schimpf³

et al. 1992

Radiochimica Acta

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Element 105 / Chemicalproperties / Complexation with OL-hydroxyisobutyrate / Pentavalent oxidation State / Nuclear decay of^^^-^^^Ha AbstractStudies of the complexation of element 105 by unbuffered ahydroxyisobutyric acid (a-HiB) and its elution from strongly acidic cation exchange resin were performed on a mixture of 34-s ^"Ha and 27-s "'Ha produced in the and reactions at a beam energy of 99 MeV. The Ha isotopes were detected by measuring the spontaneous fission and a-activities associated with their decay, and the a-decays of their daughters, 4-s and 6-s ^"Lr. Time-correlated pairs of parent and daughter a-particles were also registered. The experiments were performed on a one-minute time scale with the computer-controlled hquid chromatography system ARCA II. In 0.05 M a-HiB, element 105 was found to be eluted within 4 s from 1.6x8 mm columns together with the pentavalent Nb-, Ta-, and Pa-ions, while tetravalent Zr-and trivalent Eu-ions were strongly retained on the columns. This is independent proof that the most stable oxidation State of element 105 in aqueous Solution is + 5. This very efficient Separation of 262,263^^2 was also used, for the first time, to demonstrate that their a-and spontaneous fission decays can be registered from a «23 um thin aqueous layer in contact with a large-area passivated ionimplanted planar Silicon detector. In addition, the a-HiB separations were instrumental in the successful Identification of the hitherto undiscovered isotope produced at an '®0 beam energy of 93 MeV.

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Section: A-hib Separationsmentioning

confidence: 99%

Chemical Properties of Element 105 in Aqueous Solution: Cation Exchange Separations with α-Hydroxyisobutyric Acid

Schädel¹,

Brächte²,

Schimpf³

et al. 1992

Radiochimica Acta

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“…The a-hydroxyisobutyrate complexes have been studied also and were found to be stronger than the corresponding lactate and glycolate species (27,29). Anionic ^:1 complexes have also been reported for the a-hydroxyisobutyrates (28). Salicylate, anthranilate, thiomalate, malate, and aspartate have been reported to form complexes with some of the rare earths with stabilities increasing in the order listed (26,33).…”

Section: Review Of Literature On Rare-earth Complexesmentioning

confidence: 99%

“…Rare-earth glycolate complexes have been reported by numerous authors (18,19,26,27,28,29,30). The glycolate ligand is bidentate and apparently forms 1:1, 2:1, 3=1 and i+:l complexes with the rare earths.…”

Section: Review Of Literature On Rare-earth Complexesmentioning

confidence: 99%

“…The rare-earth lactate complexes have also received considerable study (27,28,29). The lactate complexes are stronger than the corresponding glycolates.…”

Section: Review Of Literature On Rare-earth Complexesmentioning

confidence: 99%

“…The standard deviation in each parameter was computed using Equation 28. The deviations reported are the errors of internal consistency, that is, they relate to the relative errors of the data in a given experiment.…”

Section: IV Experimental Details a Techniquementioning

confidence: 99%

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