Intercalation of aromatic amines into α-tin(IV) hydrogenphosphate monohydrate

Rodríguez‐Castellón, Enrique; Olivera‐Pastor, Pascual; Jiménez‐López, Antonio; Maireles‐Torres, Pedro; Hudson, Michael J.; Sylvester, Paul J.

doi:10.1139/v89-326

Cited by 9 publications

(1 citation statement)

References 5 publications

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“…The appearance of a band near 2750 cm -1 indicated the protonation of DAB amino groups. 16 prior to reactions with PGM ions. The recovery of PGM ions by DAB therefore proceeds in two steps: (1) the precipitation of DAB trihydrochloride salts and (2) the formation of complexes between DAB trihydrochloride salts and PGM ions.…”

Section: Stoichiometric Considerations On the Reaction Between Rh(iiimentioning

confidence: 99%

Unique Anion-exchange Properties of 3,3′-Diaminobenzidine Resulting in High Selectivity for Rhodium(III) over Palladium(II) and Platinum(IV) in a Concentrated Hydrochloric Acid Solution

et al. 2019

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The effective recovery of Rh(III) from mixtures also containing Pd(II) and Pt(IV) is one of the most difficult tasks in platinum group metal refining. Adding 3,3′-diaminobenzidine (DAB) to 7 and 10 M HCl aqueous solutions containing Rh(III), Pd(II), and Pt(IV) chlorido species affords the effective separation of Rh(III) from Pd(II) and Pt(IV) through a process where Rh(III) becomes sequestered into solid phases composed of DAB. The stoichiometry and inner coordination sphere of the metal in Rh-DAB complexes were determined by estimating the Rh(III), H + , and Clconcentrations in the solid phase and X-ray absorption fine structure measurements to clarify the mechanism of DAB selectivity for Rh(III). These results indicate that the Rh-DAB reaction in a concentrated HCl solution occurs in two steps: (1) the precipitation of DAB trihydrochloride salts, where DAB's amino groups are protonated and (2) anion exchange of the trihydrochloride salts for chloride ions with [RhCl6] 3-, which is the predominant species in a concentrated HCl solution. By contrast, ion-pair complexes with [PdCl4] 2and [PtCl6] 2were not observed in DAB phases. The significantly lower affinity of the DAB trihydro cation for [PtCl6] 2and [PdCl4] 2than for [RhCl6] 3in 7 and 10 M HCl solutions accounts for the effective separation of Rh(III) from Pd(II) and Pt(IV).

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Section: Stoichiometric Considerations On the Reaction Between Rh(iiimentioning

confidence: 99%

Unique Anion-exchange Properties of 3,3′-Diaminobenzidine Resulting in High Selectivity for Rhodium(III) over Palladium(II) and Platinum(IV) in a Concentrated Hydrochloric Acid Solution

et al. 2019

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Embedding Alkyldiamine into Layered α‐Titanium Phosphate via Direct‐Ion Exchange and its Application in Eu^III Removal from Water

Peng

Wang

et al. 2020

Zeitschrift anorg allge chemie

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Diamine-pillared α-titanium phosphate (α-TiP) was prepared via direct ion exchange method. Moreover, 1,3-propanediamine, as the pillaring agent, was used to investigate the effect of pH, content and temperature on the interlayer distance of α-TiP. The structure and properties of the samples were characterized by X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), Field Emission Scanning Electron Microscopy (SEM), and Differential Thermal Analysis (TG). The results show that the interlayer distance of α-TiP was enlarged from 7.6 Å to 16.18 Å as the carbon chain of the intercalating diamine increased from (NH 2 (CH 2 ) n NH 2 ) (n = 2 to 7). The layer 399 space structure consists of monomolecular alkyl chains with an average tilt angle of 75.6°. The uptake values for these five alkyldiamine cations were 3.780, 3.261, 2.443, 2.175, and 1.954 mmol, per gram of TiP, respectively. Also, we found that the direct ion exchange method is more effective in a weak acidic environment. The variation of interlayer distance was a consecutive process, and unaffected by temperature. The 1,3-propanediamine intercalation product (α-TiPPda) showed excellent performance towards Eu III adsorption in water with removal efficiencies Ն 99 %. Journal of Inorganic and General ChemistryZeitschrift für anorganische und allgemeine Chemie ARTICLE

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Intercalation of n-alkylamines into α-tin(IV) bis(hydrogenphosphate)

Takenaka

Ozeki

HIRAKI

et al. 1996

JOURNAL OF MATERIALS SCIENCE

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Intercalation of aromatic amines into α-tin(IV) hydrogenphosphate monohydrate

Cited by 9 publications

References 5 publications

Unique Anion-exchange Properties of 3,3′-Diaminobenzidine Resulting in High Selectivity for Rhodium(III) over Palladium(II) and Platinum(IV) in a Concentrated Hydrochloric Acid Solution

Unique Anion-exchange Properties of 3,3′-Diaminobenzidine Resulting in High Selectivity for Rhodium(III) over Palladium(II) and Platinum(IV) in a Concentrated Hydrochloric Acid Solution

Embedding Alkyldiamine into Layered α‐Titanium Phosphate via Direct‐Ion Exchange and its Application in Eu^III Removal from Water

Intercalation of n-alkylamines into α-tin(IV) bis(hydrogenphosphate)

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Intercalation of aromatic amines into α-tin(IV) hydrogenphosphate monohydrate

Cited by 9 publications

References 5 publications

Unique Anion-exchange Properties of 3,3′-Diaminobenzidine Resulting in High Selectivity for Rhodium(III) over Palladium(II) and Platinum(IV) in a Concentrated Hydrochloric Acid Solution

Unique Anion-exchange Properties of 3,3′-Diaminobenzidine Resulting in High Selectivity for Rhodium(III) over Palladium(II) and Platinum(IV) in a Concentrated Hydrochloric Acid Solution

Embedding Alkyldiamine into Layered α‐Titanium Phosphate via Direct‐Ion Exchange and its Application in EuIII Removal from Water

Intercalation of n-alkylamines into α-tin(IV) bis(hydrogenphosphate)

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Embedding Alkyldiamine into Layered α‐Titanium Phosphate via Direct‐Ion Exchange and its Application in Eu^III Removal from Water