COMPLEXES POLYMETALLIQUES DE LANTHANIDES (III) POUR LE DEVELOPPEMENT DE NOUVEAUX MATERIAUX LUMINESCENTS

Claire Marchal 1
1 RICC - Reconnaissance Ionique et Chimie de Coordination
SYMMES - SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé : DRF/INAC/SYMMES
Abstract : The incorporation of f elements in highly organized polymetallic complexes is of great interest in supramolecular
chemistry and allows the combination of their nanoscopic size with the magnetic or optical properties of the metal ions. However due to the difficulty in controlling the coordination environment of these ions, the assembly of lanthanide-based polynuclear architectures has lagged behind that of other systems. These factors make the rational design for the construction of supramolecular lanthanide complexes quite challenging. In order to better understand the factors determinating the assembly of lanthanide-based polymetallic arrays, we designed two different types of organic ligands, which favor, in one case, formation of infinite polymetallic complexes (coordination polymers), and in the case the assembly of discrete polymetallic architectures. Thus, we show that the use of flexible and multidentate picolinate-derivative ligands enables the formation of infinite and luminescent infinite framewoks which display very interesting luminescent properties. Geometry of the ligand has a great influence on the final network architecture. Particularly, implementation of four picolinate units within a tetrapodal ligand results in the controlled assembly of 1-D coordination polymers. Conversely to favor the controlled assembly of discrete polymetallic arrays we use dissymmetric ligands which displays low denticity. Complexation studies of a tridentate 8- hydroxyquinoline-derivative ligand as well as a tetradente ligand possessing an oxazoline ring are presented.
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Submitted on : Tuesday, September 8, 2009 - 5:19:00 PM
Last modification on : Thursday, October 17, 2019 - 4:42:01 PM
Long-term archiving on: Tuesday, June 15, 2010 - 11:21:22 PM

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Claire Marchal. COMPLEXES POLYMETALLIQUES DE LANTHANIDES (III) POUR LE DEVELOPPEMENT DE NOUVEAUX MATERIAUX LUMINESCENTS. Chimie. Université Joseph-Fourier - Grenoble I, 2008. Français. ⟨tel-00414350⟩

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