Thermodynamic and spectroscopic studies of cadmium(II)-N-(phosphonomethyl)glycine (PMG) complexes
(2004) In Inorganica Chimica Acta 357. p.1185-1192- Abstract
- Speciation and equilibria in the H+-Cd2+-N-(phosphonomethyl)glycine (PMG, H3L) system have been studied in 0.1 M Na(Cl) medium at 25.0 degreesC. Formation constants for a series of mononuclear complexes, CdHL, CdL-, CdL24- and CdL(OH)(2)- were determined from potentiometric titrations. The structures of the predominating species CdL-, and CdL24- in solution were investigated using EXAFS and IR spectroscopic techniques. In the 1:1 complex bonds are formed between the Cd(II) ion and all three donor groups (amino, carboxylate, phosphonate) of the PMG molecule resulting in two 5-membered chelate rings. At the remaining three of the corners of the distorted Cd(II) octahedra oxygens were found which are replaced by donor groups of a second PMG... (More)
- Speciation and equilibria in the H+-Cd2+-N-(phosphonomethyl)glycine (PMG, H3L) system have been studied in 0.1 M Na(Cl) medium at 25.0 degreesC. Formation constants for a series of mononuclear complexes, CdHL, CdL-, CdL24- and CdL(OH)(2)- were determined from potentiometric titrations. The structures of the predominating species CdL-, and CdL24- in solution were investigated using EXAFS and IR spectroscopic techniques. In the 1:1 complex bonds are formed between the Cd(II) ion and all three donor groups (amino, carboxylate, phosphonate) of the PMG molecule resulting in two 5-membered chelate rings. At the remaining three of the corners of the distorted Cd(II) octahedra oxygens were found which are replaced by donor groups of a second PMG molecule in the 1:2 complex. Furthermore, a solid phase consisting of Cd-9(PMG)(6)(H2O)(12) (.) 6H(2)O crystals was synthesized and the crystal structure was determined. The structure consists of six CdL- octahedra connected through a seventh Cd-O octahedron in the centre of the entity, with two additional Cd-O octahedra located at the apices of the unit formed. (C) 2003 Elsevier B.V. All rights reserved. (Less)
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https://lup.lub.lu.se/record/4332531
- author
- Ramstedt, M. ; Norgren, C. ; Sheals, J. ; Bostrom, D. ; Sjoberg, S. and Persson, Per LU
- publishing date
- 2004
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Inorganica Chimica Acta
- volume
- 357
- pages
- 1185 - 1192
- publisher
- Elsevier
- external identifiers
-
- scopus:1542286590
- ISSN
- 0020-1693
- DOI
- 10.1016/j.ica.2003.10.029
- language
- English
- LU publication?
- no
- additional info
- 4
- id
- 75c22f16-1823-4653-b56b-441eef15cccf (old id 4332531)
- date added to LUP
- 2016-04-01 16:12:34
- date last changed
- 2022-04-15 02:54:23
@article{75c22f16-1823-4653-b56b-441eef15cccf, abstract = {{Speciation and equilibria in the H+-Cd2+-N-(phosphonomethyl)glycine (PMG, H3L) system have been studied in 0.1 M Na(Cl) medium at 25.0 degreesC. Formation constants for a series of mononuclear complexes, CdHL, CdL-, CdL24- and CdL(OH)(2)- were determined from potentiometric titrations. The structures of the predominating species CdL-, and CdL24- in solution were investigated using EXAFS and IR spectroscopic techniques. In the 1:1 complex bonds are formed between the Cd(II) ion and all three donor groups (amino, carboxylate, phosphonate) of the PMG molecule resulting in two 5-membered chelate rings. At the remaining three of the corners of the distorted Cd(II) octahedra oxygens were found which are replaced by donor groups of a second PMG molecule in the 1:2 complex. Furthermore, a solid phase consisting of Cd-9(PMG)(6)(H2O)(12) (.) 6H(2)O crystals was synthesized and the crystal structure was determined. The structure consists of six CdL- octahedra connected through a seventh Cd-O octahedron in the centre of the entity, with two additional Cd-O octahedra located at the apices of the unit formed. (C) 2003 Elsevier B.V. All rights reserved.}}, author = {{Ramstedt, M. and Norgren, C. and Sheals, J. and Bostrom, D. and Sjoberg, S. and Persson, Per}}, issn = {{0020-1693}}, language = {{eng}}, pages = {{1185--1192}}, publisher = {{Elsevier}}, series = {{Inorganica Chimica Acta}}, title = {{Thermodynamic and spectroscopic studies of cadmium(II)-N-(phosphonomethyl)glycine (PMG) complexes}}, url = {{http://dx.doi.org/10.1016/j.ica.2003.10.029}}, doi = {{10.1016/j.ica.2003.10.029}}, volume = {{357}}, year = {{2004}}, }