X-ray investigation of the coordination and complex formation of lanthanoid ions in aqueous perchlorate and selenate solutions

Johansson, gGeorg; Wakita, Hisanobu

doi:10.1021/ic00213a035

Cited by 93 publications

(61 citation statements)

References 5 publications

(5 reference statements)

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“…r, N, and 0 are the interatomic distance, the hydration number, and the tilt angle, respectively. Table 3, together with those obtained by the neutron diffraction with the isotopic replacement method [5,6] X-ray diffraction [1][2][3][4], and X-ray absorption measure ments [7]. As seen in Table 3, the M -O and M -D interatomic distances obtained by the present isomorphous sub stitution technique are in good agreement within the uncertainties (± 0.03 Ä) with the values found by the neutron isotopic replacement method.…”

Section: Resultssupporting

confidence: 71%

“…Table 3. Structural parameters for the lanthanide(III) hydra tion obtained in the present work, together with previous results from neutron isotopic substitution [5,6], X-ray dif fraction [2,4], and X-ray absorption studies [7]. r, N, and 0 are the interatomic distance, the hydration number, and the tilt angle, respectively.…”

Section: Resultssupporting

confidence: 70%

“…Generally the results from these investigations indi cate that the hydration number changes in going from the lighter to the heavier ions in the series, although some X-ray studies [4] using isomorphous substitu tion on aqueous lanthanide(III) Perchlorate solutions suggested that the hydration number for La3+ was 8 as well as for the heavier ions. Neutron diffraction measurements [6] on 0.3 and 1.0 molal aqueous Perchlorate and chloride solutions of the Dy3+ ion indicated that the hydration number does not depend 1 National Laboratory for High Energy Physics, Oho.…”

Section: Introductionmentioning

confidence: 97%

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Pulsed Neutron Diffraction Studies on Lanthanide(III)Hydration in Aqueous Perchlorate Solutions

Yamaguchi

Wakita

Tanaka

et al. 1991

Zeitschrift Für Naturforschung A

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P u ls e d N e u tr o n D if fr a c tio n S tu d ie s o n L a n t h a n i d e ( I I I ) H y d r a tio n in A q u e o u s P e r c h lo r a te S o lu tio n s T. Yamaguchi, S. Tanaka, H. Wakita, M. Misawa1, I. Okada2, A. K. Soper3, and W. S. Howells3 Department of Chemistry, Faculty of Science, Fukuoka University, Nanakuma, Jonan-ku, Fukuoka 814-01, Japan Z. Naturforsch. 46a, 84-88 (1991); received August 1, 1990Dedicated to Dr. Karl Heinzinger on the occasion of his 60th birthday Pulsed neutron diffraction measurements are reported on 2 molar aqueous solutions of Pr3 + , Nd3 + , Tb3 + , Dy3 + , Tm3 + , and Yb3+ in D20 at room temperature. The first order difference technique on isomorphous ions is used to derive the metal ion pair correlation functions in these systems. The metal-oxygen and metal-deuterium distances and the hydration numbers are deter mined. The data indicate that the hydration number changes from ~ 10 for the lighter ions to ~8 for the heavier ones in the series. The water dipole is orientated on the average at an angle of 10 ~ 20 degrees to the metal-oxygen vector; these values are significantly smaller than those found for mono-and di-valent ions. The present results are compared with other results from neutron diffraction with isotope substitution, X-ray diffraction, and extended X-ray absorption fine structure.

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Section: Resultssupporting

confidence: 71%

Section: Resultssupporting

confidence: 70%

Section: Introductionmentioning

confidence: 97%

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Pulsed Neutron Diffraction Studies on Lanthanide(III)Hydration in Aqueous Perchlorate Solutions

Yamaguchi

Wakita

Tanaka

et al. 1991

Zeitschrift Für Naturforschung A

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“…In this study, the major anions in solution are OH À and Cl À , the latter originating from iron chloride salt used in the preparation of iron nanoparticles. It is documented that REE complexes with Cl À are relatively weak outer sphere complexes [19,23,24]. Consequently the speciation of REEs will be dominated by their hydroxyl species.…”

Section: Comments On the Uptake Mechanism Of Reesmentioning

confidence: 99%

Removal of aqueous rare earth elements (REEs) using nano-iron based materials

Yeşiller

Eroğlu

Shahwan

2013

Journal of Industrial and Engineering Chemistry

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The uptake of REEs was investigated using nano-zero valent iron (nZVI) and alumina-supported nZVI (Al-nZVI). The results indicated fast uptake, with saturation approached within 10 min of contact between solutions and solids. Upon using nZVI, the uptake of REEs seemed to be quantitative over the studied range of concentration; 1.0–100.0 mg L−1. When Al-nZVI was used, complete removal was achieved within the range of 1.0–10.0 mg L−1. The solids demonstrated stable performance beyond pH of 2.0, up to neutral pH conditions. Fractionation of REEs on Al-nZVI was observed. The REE ions seem to be fixed to oxide and oxyhydroxide surface groups

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“…[39] Johansson et al determined that a coordination number of eight best simulated their X-ray data recorded for 1-4.6 m perchlorate and selenate solutions of La 3 + ; however, using a coordination number of seven or nine did not decrease greatly the quality of their fits. [40] The most common coordination numbers for La 3 + in solutions are eight and nine. Figure 6) reveals that the nine-and ten-ligand complexes with nine ligands in the primary solvation shell are only 4.8 and 2.6 kcal mol À1 , respectively, higher in energy than the complex with eight ligands in the primary shell and the remaining water molecules in the secondary shell.…”

mentioning

confidence: 99%

Coordination of Triply Charged Lanthanum in the Gas Phase: Theory and Experiment

Shi

Hopkinson

Siu

2007

Chemistry A European J

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Ion-molecule reactions between complexes [La(CH3CN)n]3+ (n=6-9) or [La(NC(CH2)4CN)n]3+ (n=3-4) and water were studied at low collision energies in the second quadrupole of a tandem mass spectrometer. The products [La(CH3CN)p(H2O)8-p]3+ (p=6-8) and [La(NC(CH2)4CN)q(H2O)8-2q]3+ (q=3-4) had the highest relative abundances. This strongly suggests that the preferred coordination number of La3+ is eight. Similarly, the coordination number of Ca2+ was re-examined both experimentally and theoretically, and was found to be six, in good agreement with previous observations. Density functional calculations provide strong evidence that the primary solvation shell of [La(L)n]3+ consists of eight ligands; additional ligands reside in a second solvation shell and are hydrogen bonded to one or two water molecules in the first shell.

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X-ray investigation of the coordination and complex formation of lanthanoid ions in aqueous perchlorate and selenate solutions

Cited by 93 publications

References 5 publications

Pulsed Neutron Diffraction Studies on Lanthanide(III)Hydration in Aqueous Perchlorate Solutions

Pulsed Neutron Diffraction Studies on Lanthanide(III)Hydration in Aqueous Perchlorate Solutions

Removal of aqueous rare earth elements (REEs) using nano-iron based materials

Coordination of Triply Charged Lanthanum in the Gas Phase: Theory and Experiment

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