Role of the Main and Auxiliary Ligands in the Nuclearity of Cu-Ln Complexes

Autor: Maria‐Jesus Rodriguez Douton, Jean-Pierre Costes, Laure Vendier, Sergiu Shova
Přispěvatelé: Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), National Enterprise for nanoScience and nanoTechnology (NEST), Scuola Normale Superiore di Pisa (SNS)-Scuola Universitaria Superiore Sant'Anna [Pisa] (SSSUP)-Istituto Italiano di Tecnologia (IIT)-Consiglio Nazionale delle Ricerche [Pisa] (CNR PISA), 'Petru Poni' Institute of Macromolecular Chemistry
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: European Journal of Inorganic Chemistry
European Journal of Inorganic Chemistry, Wiley-VCH Verlag, 2020, 2020 (4), pp.382-393. ⟨10.1002/ejic.201901150⟩
European journal of inorganic chemistry (Internet) 2020 (2020): 382–393. doi:10.1002/ejic.201901150
info:cnr-pdr/source/autori:Costes J.-P.; Rodriguez Douton M.-J.; Shova S.; Vendier L./titolo:Role of the Main and Auxiliary Ligands in the Nuclearity of Cu-Ln Complexes/doi:10.1002%2Fejic.201901150/rivista:European journal of inorganic chemistry (Internet)/anno:2020/pagina_da:382/pagina_a:393/intervallo_pagine:382–393/volume:2020
ISSN: 1434-1948
1099-0682
DOI: 10.1002/ejic.201901150⟩
Popis: International audience; Trianionic ligands with an inner N2O2, an outer O2O2 or O2O coordination site and an oxygen atom coming from an amide function not involved in these sites yield dinuclear Cu-Ln complexes that self-assemble into tetranuclear species with an alternate arrangement of Cu and Ln ions. This alternate Cu-Gd arrangement impedes Cu–Cu and Gd-Gd interactions that could be antiferromagnetic and favours ferromagnetic Cu-Gd interactions whose strength depends on the nature of the bridge, the phenoxo bridge made of a single oxygen atom or the amidato bridge made of three NCO atoms. Depending on the ligands, the phenoxo bridges can be single (CuOGd) or double (CuO2Gd), while the amidato bridge is always a single (CuNCOGd) bridge. A particular complex involving a trinuclear Cu-Gd-Cu arrangement through two amidato bridges confirms that the Cu-Gd interaction through the amidato bridge is always weaker than the interaction through the phenoxo bridge. It has been possible to obtain complexes with an alternate Cu-Gd arrangement involving more than two Cu-Gd entities when two amidato bridges are present. These two amidato bridges may come from a main ligand, as in the case of tetraanionic ligands possessing two amide functions, or from two different ligands involving one amide function that are assembled by a Gd ion through their phenoxo functions. Note that the presence of auxiliary ligands with a good chelating ability for the Gd ion, such as the diketonato ligands, allows isolation of tetranuclear species only, regardless of the number of amide functions.
Databáze: OpenAIRE
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