Thermodynamic Stability of Mn(II) Complexes with Aminocarboxylate Ligands Analyzed Using Structural Descriptors
Use este enlace para citar
http://hdl.handle.net/2183/32373
A non ser que se indique outra cousa, a licenza do ítem descríbese como Atribución 4.0 Internacional
Coleccións
- GI-REACT! - Artigos [103]
Metadatos
Mostrar o rexistro completo do ítemTítulo
Thermodynamic Stability of Mn(II) Complexes with Aminocarboxylate Ligands Analyzed Using Structural DescriptorsAutor(es)
Data
2022-08-22Cita bibliográfica
Uzal-Varela, R., Pérez-Fernández, F., Valencia, L., Rodríguez-Rodríguez, A., Platas-Iglesias, C., Caravan, P., and Esteban-Gómez, D. (2022). Thermodynamic Stability of Mn(II) Complexes with Aminocarboxylate Ligands Analyzed Using Structural Descriptors. Inorg. Chem. 61, 35, 14173–14186. https://doi.org/10.1021/acs.inorgchem.2c02364
Resumo
[Abstract] We present a quantitative analysis of the thermodynamic stabilities of Mn(II) complexes, defined by the equilibrium constants (log KMnL values) and the values of pMn obtained as −log[Mn]free for total metal and ligand concentrations of 1 and 10 μM, respectively. We used structural descriptors to analyze the contributions to complex stability of different structural motifs in a quantitative way. The experimental log KMnL and pMn values can be predicted to a good accuracy by adding the contributions of the different motifs present in the ligand structure. This allowed for the identification of features that provide larger contributions to complex stability, which will be very helpful for the design of efficient chelators for Mn(II) complexation. This issue is particularly important to develop Mn(II) complexes for medical applications, for instance, as magnetic resonance imaging (MRI) contrast agents. The analysis performed here also indicates that coordination number eight is more common for Mn(II) than is generally assumed, with the highest log KMnL values generally observed for hepta- and octadentate ligands. The X-ray crystal structure of [Mn2(DOTA)(H2O)2], in which eight-coordinate [Mn(DOTA)]2– units are bridged by six-coordinate exocyclic Mn(II) ions, is also reported.
Versión do editor
Dereitos
Atribución 4.0 Internacional
ISSN
1520-510X