SANS study of dialkylsubstituted diphosphonic acids and their complexes with Ca, Fe, La, Th and U in toluene

V. Urban; R. Chiarizia; A. W. Herlinger; C. Y. Ku; P. Thiyagarajan

doi:10.1016/S0921-4526(97)00586-3

SANS study of dialkylsubstituted diphosphonic acids and their complexes with Ca, Fe, La, Th and U in toluene

V. Urban, R. Chiarizia, A. W. Herlinger, C. Y. Ku, P. Thiyagarajan

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

The aggregation of di(2ethylhexyl) methane-, ethane- and butanediphosphonic acids and their complexes with various metal cations at different concentrations in toluene have been studied in detail using small angle neutron scattering. The diphosphonic acids are being employed as novel solvent extraction reagents in the Chemistry Division of ANL. These compounds exhibit extraordinarily strong affinity for actinide ions and for Fe(III). The growth of large metal-diphosphonate aggregates depends on the metal species, metal to extractant ratio, and the length of the carbon bridge between the two acid groups. Fe(III) complexes with the methane and butane (but not the ethane) bridged diphosphonic acid aggregate to form large polymeric rods at high metal to extractant ratios. Actinide ions likewise give large aggregates with di(2ethylhexyl) methanediphosphonic acid. Ca²⁺ and La³⁺ show only the usual formation of small 'monomeric' chelates.

Original language	English
Pages (from-to)	355-357
Number of pages	3
Journal	Physica B: Physics of Condensed Matter
Volume	241-243
DOIs	https://doi.org/10.1016/S0921-4526(97)00586-3
State	Published - 1997
Externally published	Yes

Funding

We thank D.G. Wozniak of the IPNS Division for assistance on the SANS experiments. This work benefited from the use of the Intense Pulsed Neutron Source. This facility is funded by BES-Materials Science, US Department of Energy, under contract W-31-109-ENG-38.

Funders	Funder number
BES-Materials
US Department of Energy	W-31-109-ENG-38

Keywords

Aggregation
Diphosphonic acids
Metal chelates
SANS

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10.1016/S0921-4526(97)00586-3

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title = "SANS study of dialkylsubstituted diphosphonic acids and their complexes with Ca, Fe, La, Th and U in toluene",

abstract = "The aggregation of di(2ethylhexyl) methane-, ethane- and butanediphosphonic acids and their complexes with various metal cations at different concentrations in toluene have been studied in detail using small angle neutron scattering. The diphosphonic acids are being employed as novel solvent extraction reagents in the Chemistry Division of ANL. These compounds exhibit extraordinarily strong affinity for actinide ions and for Fe(III). The growth of large metal-diphosphonate aggregates depends on the metal species, metal to extractant ratio, and the length of the carbon bridge between the two acid groups. Fe(III) complexes with the methane and butane (but not the ethane) bridged diphosphonic acid aggregate to form large polymeric rods at high metal to extractant ratios. Actinide ions likewise give large aggregates with di(2ethylhexyl) methanediphosphonic acid. Ca2+ and La3+ show only the usual formation of small 'monomeric' chelates.",

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author = "V. Urban and R. Chiarizia and Herlinger, {A. W.} and Ku, {C. Y.} and P. Thiyagarajan",

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doi = "10.1016/S0921-4526(97)00586-3",

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T1 - SANS study of dialkylsubstituted diphosphonic acids and their complexes with Ca, Fe, La, Th and U in toluene

AU - Urban, V.

AU - Chiarizia, R.

AU - Herlinger, A. W.

AU - Ku, C. Y.

AU - Thiyagarajan, P.

PY - 1997

Y1 - 1997

N2 - The aggregation of di(2ethylhexyl) methane-, ethane- and butanediphosphonic acids and their complexes with various metal cations at different concentrations in toluene have been studied in detail using small angle neutron scattering. The diphosphonic acids are being employed as novel solvent extraction reagents in the Chemistry Division of ANL. These compounds exhibit extraordinarily strong affinity for actinide ions and for Fe(III). The growth of large metal-diphosphonate aggregates depends on the metal species, metal to extractant ratio, and the length of the carbon bridge between the two acid groups. Fe(III) complexes with the methane and butane (but not the ethane) bridged diphosphonic acid aggregate to form large polymeric rods at high metal to extractant ratios. Actinide ions likewise give large aggregates with di(2ethylhexyl) methanediphosphonic acid. Ca2+ and La3+ show only the usual formation of small 'monomeric' chelates.

AB - The aggregation of di(2ethylhexyl) methane-, ethane- and butanediphosphonic acids and their complexes with various metal cations at different concentrations in toluene have been studied in detail using small angle neutron scattering. The diphosphonic acids are being employed as novel solvent extraction reagents in the Chemistry Division of ANL. These compounds exhibit extraordinarily strong affinity for actinide ions and for Fe(III). The growth of large metal-diphosphonate aggregates depends on the metal species, metal to extractant ratio, and the length of the carbon bridge between the two acid groups. Fe(III) complexes with the methane and butane (but not the ethane) bridged diphosphonic acid aggregate to form large polymeric rods at high metal to extractant ratios. Actinide ions likewise give large aggregates with di(2ethylhexyl) methanediphosphonic acid. Ca2+ and La3+ show only the usual formation of small 'monomeric' chelates.

KW - Aggregation

KW - Diphosphonic acids

KW - Metal chelates

KW - SANS

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M3 - Article

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SN - 0921-4526

VL - 241-243

SP - 355

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JO - Physica B: Physics of Condensed Matter

JF - Physica B: Physics of Condensed Matter

ER -

SANS study of dialkylsubstituted diphosphonic acids and their complexes with Ca, Fe, La, Th and U in toluene

Abstract

Funding

Keywords

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