IMCN seminar - Dr. Thomas DEVIC

IMCN SEMINAR - Dr. Thomas DEVIC
Université de Nantes - Institut des Matériaux Jean Rouxel (IMN)

«Metal Organic Frameworks built up from (poly)phenolate ligands: challenges and opportunities»

ABSTRACT

Porous Coordination Polymers or Metal Organic Frameworks (MOFs) belong to one of the most recent class of porous materials, and have been proposed in various fields of application, ranging from gas storage and capture to heterogeneous catalysis and controlled drug release. Whereas the broad variety of available organic and inorganic building units should lead to a huge diversity of accessible materials with tunable structures and porosities, most MOFs "blockbusters" (e.g. HKUST-1, MIL-100, UiO-66,...) derived from solely from few simple poly-carboxylate ligands. There is nevertheless still a rising interest in the development of new MOFs built up from alternative complexing groups, not only because of the structural diversity they offer, but also because of the properties they can afford. In the last years, we focused our attention of the use of phenolate derived ligands,[1-3] which combine noticeable advantages: a very good compatibility with highly charged oxophilic cations, a stronger basicity than carboxylate groups and a redox activity (phenol/quinone redox couple). These features could lead to exceptionally high chemical stability, as well as unusual (opto)electronic properties. We will here discuss the reactivity of such ligands with both endogenous bio-friendly cations (Mg, Ca)[1] and highly charged ones (Ti, Zr),[2,3] with a specific interest in identifying robust inorganic secondary building units suitable to design new materials. The in depth structural characterization of these solids, mostly by the combination of X-ray diffraction and solid state NMR analysis, will also be presented, together with their properties (chemical stability, catalytic activity, redox behavior,…).

References
[1] L. Cooper et al., Chem. Commun. 2015, 51, 5848; T. Hidalgo et al., J. Mater. Chem. B. 2017, 5, 2813
[2] L. Cooper et al., Eur. J. Inorg. Chem.2014, 6281 ; G. Mouchaham et al., Angew. Chem. Int. Ed. 2015, 54, 13297; G. Mouchaham et al., Chem. Commun. 2017, 53, 7661
[3] H. Assi et al., Inorg. Chem. 2016, 55, 7192; H. Assi et al., Polyhedron 2018, 156, 111