Derivatized Layered M(IV) Phosphonates

Dines, Martin B.; Digiacomo, Peter M.; Callahan, Kenneth P.; Griffith, P. C.; Lane, Robert H.; Cooksey, Ricci E.

doi:10.1021/bk-1982-0192.ch013

Cited by 40 publications

(26 citation statements)

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“…For example they may be sulfonated by immersion in sulfuric acid [4] or functional groups may be incorporated by addition of a second ligand [5,6]. A somewhat different procedure was applied by Medoukali et al using a solgel technique in propanol with a mixture of the biphenyldi-*Author for correspondance (E-mail: clearfield@chem.tamu.edu).…”

Section: Introductionmentioning

confidence: 99%

Pillared metal(IV) phosphate-phosphonate extraction of actinides

Burns

Clearfield²,

Borkowski

et al. 2012

Radiochimica Acta

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Four pillared metal(IV) phosphate-phosphonate ion exchange materials were synthesized and characterized. Studies were conducted to determine their affinity for the lanthanides (Ln's) and actinides (An's). It was determined that by simply manipulating the metal source (Zr or Sn) and the phosphate source (H 3 PO 4 or Na 3 PO 4 ) large differences were seen in the extraction of the Ln and An species. K d values higher than 4 × 10 5 were observed for the AnO 2 2+ species in nitric acid at pH 2. These basic uptake experiments are important, as the data they provide may indicate the possibility of a separation of Ln's from An's or even more notably americium from curium and Ln's.

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Section: Introductionmentioning

confidence: 99%

Pillared metal(IV) phosphate-phosphonate extraction of actinides

Burns

Clearfield²,

Borkowski

et al. 2012

Radiochimica Acta

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“…A series of compounds of general composition Zr(O PC H PO ) \ V (HPO ) V was prepared and indeed, the surface area was found to increase to a maximum at &50% substitution of phosphite, as shown in Fig. 3 (16). We repeated these experiments using phosphoric acid as a spacer group and found that while the surface areas were high, the distribution of pore sizes was quite large for both the biphenyl and terphenyl derivatives.…”

Section: Figmentioning

confidence: 90%

“…Dines "rst conceived of producing porous materials by crosslinking the -zirconium phosphate-type layers using diphosphonic acids, H O P}R}PO H , where R may be an alkyl or aryl group (16). The strategy was to choose the crosslinking groups that are tall and then space them such that di!erent size pores would result as indicated in Fig.…”

Section: Figmentioning

confidence: 99%

Highly Porous Zirconium Aryldiphosphonates and Their Conversion to Strong Bronsted Acids

Clearfield

Wang

Bellinghausen

2002

Journal of Solid State Chemistry

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“…The vast majority of these solids are layered and may be modulated by the choice of both organic and inorganic moieties. This modulation can lead to structural diversity, allowing a wide range of applications such as sorption and ion exchange [1], catalysis [2, 3], sensors [4,5] and non-linear optics [4,6,7].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of new hybrid organic/inorganic systems derived from calcium (α-aminoalkyl)-phosphonates and -phosphonocarboxylates

Al-Ali

Lebugle

Rico‐Lattes

et al. 2005

Journal of Colloid and Interface Science

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We have studied the phenomenon of calcium complexation by lab synthesized amphiphilic (alpha-aminoalkyl)-phosphonocarboxylic or -phosphonic acids. The electrical conductivity of aqueous solutions of sodium salts of all these acids was measured versus the volume of a calcium salt solution added. It appeared that calcium complexes are formed in a Ca/P atomic ratio close to 1. Calcium phosphonocarboxylates and calcium phosphonates were also precipitated by mixing aqueous solutions of disodium salts of phosphorus amphiphiles and calcium nitrate solutions. Before chemical analysis, these complexes were calcined to remove the organic part. In the mineralized products, calcium and phosphate were assayed: the Ca/P atomic ratio was equal to 1. X-ray diffraction and IR spectroscopy showed that they are made entirely of beta pyrophosphate (Ca2P2O7), a result in agreement with previous chemical analysis. The chemical formula of the starting calcium complexes could be written as CaL2H2O (L=ligand). The SEM micrographs of these complexes show plate-like structures. XRD patterns are characteristic of layered structures. These facts suggest that calcium complexes are composed of alternating bimolecular layers of calcium alkylphosphonocarboxylates or calcium alkylphosphonates, the chains being tilted and partially interdigitated.

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Derivatized Layered M(IV) Phosphonates

Cited by 40 publications

References 0 publications

Pillared metal(IV) phosphate-phosphonate extraction of actinides

Pillared metal(IV) phosphate-phosphonate extraction of actinides

Highly Porous Zirconium Aryldiphosphonates and Their Conversion to Strong Bronsted Acids

Preparation and characterization of new hybrid organic/inorganic systems derived from calcium (α-aminoalkyl)-phosphonates and -phosphonocarboxylates

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