A study in the complex formation of iminodiacetic acid and nitrilotriacetic acid with aluminium, chromium and beryllium ions

Dubey, Sonal; Singh, Anshul; Puri, D. M.

doi:10.1016/0022-1902(81)90038-5

Cited by 18 publications

(3 citation statements)

References 5 publications

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“…Additional ions include [L –H ] – and [HSO 4 ] – at m/z 132 and m/z 97, respectively, while the signal at m/z 97 was observed as the most prominent negative ion as shown in the illustrative mass spectrum in Figure (b). Importantly, the speciation information provided by the ESI mass spectra of the Be 2+ /IDA system is in good agreement with potentiometric speciation data which have shown the [L –2H BeOH] – species to be the most prominent species when employing beryllium perchlorate as the source of Be 2+ , . Contrary to the perchlorate ion ClO 4 – , the sulfate group SO 4 2– has been observed elsewhere to bind strongly to the beryllium cation .…”

Section: Resultssupporting

confidence: 81%

Electrospray Ionisation Mass Spectrometric (ESI MS) Screening and Characterisation of Beryllium Complexes with Potentially Encapsulating Aminopolycarboxylate and Related Ligands

et al. 2018

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A fundamental issue in beryllium research is the search for suitable chelating ligands for environmental and biomedical application. In this paper, the speciation of beryllium ions with several multidentate aminopolycarboxylic acids, which are well‐known commercial and biomedical chelating agents, has been investigated using electrospray ionisation mass spectrometry (ESI MS). Stoichiometric information, which was readily obtained from the ESI mass spectra, was found to be effective for the preliminary screening of potential encapsulation by tetradentate coordination from a single ligand. Ions observed by ESI MS revealed that the pre‐existing solution species and binding affinity trends were preserved into the gas phase in good agreement with previous solution speciation data, suggesting the ability of ESI MS to be developed as a quick, sensitive and safe screening technique to observe beryllium speciation with ligands of interest at low concentrations. The disruption of beryllium‐ligand binding by addition of other di‐ or trivalent metal cations is also reported.

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Section: Resultssupporting

confidence: 81%

Electrospray Ionisation Mass Spectrometric (ESI MS) Screening and Characterisation of Beryllium Complexes with Potentially Encapsulating Aminopolycarboxylate and Related Ligands

et al. 2018

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“…Instead, the small organic ligands may adsorb via an initial attachment to small monomeric species that coexist with the larger Keggin-type species in solution. Monomeric and dimeric species with a 1:1 Al:NTA or IDA ratio have been observed in aqueous solution between a pH of 3–4, and their structure determined using single-crystal X-ray diffraction. − As the partially hydrolyzed solution contains monomers and larger polyaluminum species, adsorption to the smaller species may be favored, followed by adsorption of the chelated Al polyhedra to the Al 30 surface. In addition, complexation of the organic species to the surface of the Keggin molecule would require release of the water molecule followed by bond formation to the hydroxyl or carboxylate functional group on the organic species.…”

Section: Resultsmentioning

confidence: 99%

Surface Modification of Al₃₀ Keggin-Type Polyaluminum Molecular Clusters

2013

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Keggin-type molecular clusters formed from the partial hydrolysis of aluminum in aqueous solutions have the capacity to adsorb a variety of inorganic and organic contaminants. The adsorptive capability of Keggin-type polyaluminum species, such as Al13 and Al30, lead to their wide usage as precursors for heterogeneous catalysts and clarifying agents for water purification applications, but a molecular-level understanding of adsorption process is lacking. Two model Al30 clusters, whose surface has been modified with chelated metals (Al(3+) and Zn(2+)) have been synthesized and structurally characterized by single-crystal X-ray diffraction. Al32IDA [(Al(IDA)H2O)2(Al30O8(OH)60(H2O)22)](2,6-NDS)4(SO4)2Cl4(H2O)40, IDA = iminodiacetic acid, 2,6-NDS = 2,6 napthalene disulfonate) crystallize in the triclinic space group, P1 with a = 13.952(2) Å, b = 16.319(3) Å, c = 23.056(4) Å, α = 93.31(1)°, β = 105.27(1)°, and γ = 105.52(1)°. Zn2Al32 [(Zn(NTA)H2O)2(Al(NTA)(OH)2)2(Al30(OH)60(O)8(H2O)20](2,6-NDS)5(H2O)64, (NTA = nitrilotriacetic acid), also crystallizes in P1 with unit cell parameter refined as a = 16.733(7) Å, b = 18.034(10) Å, c = 21.925(11) Å, α = 82.82(2)°, β = 70.96(2)°, and γ = 65.36(2)°. The chelated metal centers adsorb to the surface of the Al30 clusters through hydroxyl bridges located at the central belt region of the molecule. The observed binding sites for the metal centers mirror the reactivity predicted by previously reported molecular dynamic simulations and can be identified by the acidity and hydration factor of the water group that participates in the adsorption process.

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“…It is interesting to compare them with similar complexation constants in solution. The complex AlL can be compared with that formed by iminodiacetic acid (IDA) and N-hydroxyiminodiacetic acid 24 and logK 110 = 2 2.89 for Al-HIDA, 25 not far from the intrinsic complexation constant obtained here. This agreement was observed previously for other systems.…”

Section: Log H Lmentioning

confidence: 67%

Study of aluminium speciation in freshwaters by sorption on a chelating resin

Pesavento¹,

Biesuz²,

Palet³

1998

Analyst

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A study in the complex formation of iminodiacetic acid and nitrilotriacetic acid with aluminium, chromium and beryllium ions

Cited by 18 publications

References 5 publications

Electrospray Ionisation Mass Spectrometric (ESI MS) Screening and Characterisation of Beryllium Complexes with Potentially Encapsulating Aminopolycarboxylate and Related Ligands

Electrospray Ionisation Mass Spectrometric (ESI MS) Screening and Characterisation of Beryllium Complexes with Potentially Encapsulating Aminopolycarboxylate and Related Ligands

Surface Modification of Al₃₀ Keggin-Type Polyaluminum Molecular Clusters

Study of aluminium speciation in freshwaters by sorption on a chelating resin

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A study in the complex formation of iminodiacetic acid and nitrilotriacetic acid with aluminium, chromium and beryllium ions

Cited by 18 publications

References 5 publications

Electrospray Ionisation Mass Spectrometric (ESI MS) Screening and Characterisation of Beryllium Complexes with Potentially Encapsulating Aminopolycarboxylate and Related Ligands

Electrospray Ionisation Mass Spectrometric (ESI MS) Screening and Characterisation of Beryllium Complexes with Potentially Encapsulating Aminopolycarboxylate and Related Ligands

Surface Modification of Al30 Keggin-Type Polyaluminum Molecular Clusters

Study of aluminium speciation in freshwaters by sorption on a chelating resin

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Surface Modification of Al₃₀ Keggin-Type Polyaluminum Molecular Clusters