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Uzal-Varela R, Rodríguez-Rodríguez A, Wang H, Esteban-Gómez D, Brandariz I, Gale EM, Caravan P, Platas-Iglesias C. Prediction of Gd(III) complex thermodynamic stability. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214606] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Thakur P, Mathur J, Choppin G. Complexation thermodynamics and the structure of the binary and the ternary complexes of Am3+, Cm3+ and Eu3+ with CDTA and CDTA+IDA. Inorganica Chim Acta 2007. [DOI: 10.1016/j.ica.2007.04.052] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Sanchiz J, Esparza P, Villagra D, Domínguez S, Mederos A, Brito F, Araujo L, Sánchez A, Arrieta JM. Holo- and hemidirected lead(II) in the polymeric [Pb(4)(mu-3,4-TDTA)2(H2O)2]*4H2O complex. N,N,N',N'-tetraacetate ligands derived from o-phenylenediamines as sequestering agents for lead(II). Inorg Chem 2002; 41:6048-55. [PMID: 12425632 DOI: 10.1021/ic0201304] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The coordinating ability of the ligands 3,4-toluenediamine-N,N,N',N'-tetraacetate (3,4-TDTA), o-phenylenediamine-N,N,N',N'-tetraacetate (o-PhDTA), and 4-chloro-1,2-phenylenediamine-N,N,N',N'-tetraacetate (4-Cl-o-PhDTA) (H4L acids) toward lead(II) is studied by potentiometry (25 degrees C, I = 0.5 mol x dm(-3) in NaClO4), UV-vis spectrophotometry, and 207Pb NMR spectrometry. The stability constants of the complex species formed were determined. X-ray diffraction structural analysis of the complex [Pb4(mu-3,4-TDTA)4(H2O)2]*4H2O (1) revealed that 1 has a 2-D structure. The layers are built up by the polymerization of centrosymmetric [Pb4L2(H2O)2] tetranuclear units. The neutral layers have the aromatic rings of the ligands pointing to the periphery, whereas the metallic ions are located in the central part of the layers. In compound 1, two types of six-coordinate lead(II) environments are produced. The Pb(1) is coordinated to two nitrogen atoms and four carboxylate oxygens from the ligand, whereas Pb(2) has an O6 trigonally distorted octahedral surrounding. The lead(II) ion is surrounded by five carboxylate oxygens and a water molecule. The carboxylate oxygens belong to four different ligands that are also joined to four other Pb(1) ions. The selective uptake of lead(II) was analyzed by means of chemical speciation diagrams as well as the so-called conditional or effective formation constants K(Pb)eff. The results indicate that, in competition with other ligands that are strong complexing agents for lead(II), our ligands are better sequestering agents in acidic media.
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Affiliation(s)
- Joaquín Sanchiz
- Department of Inorganic Chemistry, University of La Laguna, E-38204 La Laguna, Tenerife, Canary Islands, Spain
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Sanchiz J, Domínguez S, Mederos A, Brito F, Arrieta JM. Tetramethyl Carboxylic Acids Derived from o-Phenylenediamines as Sequestering Agents for Iron(III): Thermodynamic Studies. X-ray Crystal Structure of Sodium Aqua(4-chloro-1,2-phenylenediamine-N,N,N‘,N‘-tetraacetato)ferrate(III)−Water (1/1.5). Inorg Chem 1997. [DOI: 10.1021/ic9700617] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joaquín Sanchiz
- Department of Inorganic Chemistry, University of La Laguna, 38204 La Laguna, Tenerife, Canary Islands, Spain; Laboratory of Equilibria in Solution, School of Chemistry, Faculty of Sciences, Central University of Venezuela, Caracas, Venezuela; and Department of Inorganic Chemistry, University of the País Vasco, Apartado 644, E-48080 Bilbao, Spain
| | - Sixto Domínguez
- Department of Inorganic Chemistry, University of La Laguna, 38204 La Laguna, Tenerife, Canary Islands, Spain; Laboratory of Equilibria in Solution, School of Chemistry, Faculty of Sciences, Central University of Venezuela, Caracas, Venezuela; and Department of Inorganic Chemistry, University of the País Vasco, Apartado 644, E-48080 Bilbao, Spain
| | - Alfredo Mederos
- Department of Inorganic Chemistry, University of La Laguna, 38204 La Laguna, Tenerife, Canary Islands, Spain; Laboratory of Equilibria in Solution, School of Chemistry, Faculty of Sciences, Central University of Venezuela, Caracas, Venezuela; and Department of Inorganic Chemistry, University of the País Vasco, Apartado 644, E-48080 Bilbao, Spain
| | - Felipe Brito
- Department of Inorganic Chemistry, University of La Laguna, 38204 La Laguna, Tenerife, Canary Islands, Spain; Laboratory of Equilibria in Solution, School of Chemistry, Faculty of Sciences, Central University of Venezuela, Caracas, Venezuela; and Department of Inorganic Chemistry, University of the País Vasco, Apartado 644, E-48080 Bilbao, Spain
| | - Juan Manuel Arrieta
- Department of Inorganic Chemistry, University of La Laguna, 38204 La Laguna, Tenerife, Canary Islands, Spain; Laboratory of Equilibria in Solution, School of Chemistry, Faculty of Sciences, Central University of Venezuela, Caracas, Venezuela; and Department of Inorganic Chemistry, University of the País Vasco, Apartado 644, E-48080 Bilbao, Spain
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Azuma S, Nakasuka N, Tanaka M. Thermodynamic Studies on the Complexation ofo-Phenylenediamine-N,N,N′,N′-tetraacetate with Divalent Cadmium, Mercury, and Lead Ions in Aqueous Solutions. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1992. [DOI: 10.1246/bcsj.65.2333] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Nakasuka N, Sawaragi (née Kunimatsu) M, Matsumura K, Tanaka M. Thermodynamic Studies on the Complexation of Alkaline-Earth Metal Ions witho-Phenylenediamine-N,N,N′,N′-tetraacetate in Aqueous Solutions. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1992. [DOI: 10.1246/bcsj.65.1722] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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