Catégorie d'actualités : IMAP

Congrats to Shan Dai, Antoine Tissot and Christian Serre for their review paper « Recent Progresses in Metal–Organic Frameworks Based Core–shell Composites » in the journal Advanced Energy Materials
Article here: doi/10.1002/aenm.202100061

Abstract
Encapsulation of active guest compounds inside metal–organic frameworks (MOFs) architectures is one of the most promising routes to reach properties beyond those of the bare MOFs and/or guest species. In contrast with the conventional host/guest composites that rely on the encapsulation of guest species into MOF cavities, core–shell composites display a better accessibility to the pores ensuring an optimal diffusion of the substrate while presenting a unique structure that prevents the aggregation and the runoff of the active guests and ensures a tight interaction between core and shell, leading to synergistic effects. Herein, the recent advances in this field are summarized. The main synthetic strategies are first discussed before highlighting a few potential applications, such as heterogeneous environmental catalysis, gas separation, and sensing, while others (bio‐applications…) are briefly mentioned. This review is concluded by a critical perspective in order to promote new generations of MOFs based composites for energy‐related applications.

Press Release (in french) : Communiqué

One-step versatile room temperature synthesis of metal(IV) carboxylate MOFs

Shan Dai^[a,b]，Farid Nouar^[a], Sanjun Zhang^[b], Antoine Tissot*^[a], Christian Serre*^[a]

[a] S. Dai, Dr. F. Nouar, Dr. A. Tissot, Dr. C. Serre Institut des Matériaux Poreux de Paris, UMR 8004 Ecole Normale Supérieure, ESPCI Paris, CNRS, PSL University, 75005, Paris, France

[b] S. Dai, S.J. Zhang State Key Laboratory of Precision Spectroscopy, East China Normal University, No. 3663, North Zhongshan Road, Shanghai 200062, China

Angew. Chem. Int. Ed. 2020, accepted article, https://doi.org/10.1002/anie.202014184

Contact Chercheur : Antoine Tissot, antoine.tissot@ens.psl.eu; Christian Serre, christian.serre@ens.psl.eu

Contact Communication Chimie :
communication.chimie@ens.psl.eu
Département Chimie ENS (www.chimie.ens.psl.eu)

Press Release (in french) : Communiqué

References:
Metal-organic magnets with large coercivity and ordering temperature up to 242°C
Panagiota Perlepe, Itziar Oyarzabal, Aaron Mailman, Morgane Yquel, Mikhail Platunov, Iurii Dovgaliuk, Mathieu Rouzières, Philippe Négrier, Denise Mondieig, Elizaveta A. Suturina, Marie-Anne Dourges, Sébastien Bonhommeau, Rebecca A. Musgrave, Kasper S. Pedersen, Dmitry Chernyshov, Fabrice Wilhelm, Andrei Rogalev, Corine Mathonière and Rodolphe Clérac
Science 2020; 30 Octobre
DOI: 10.1126/science.abb3861

Mesoporous materials suffer from limitations including poor crystallinity and hydrolytic stability, lack of chemical diversity, insufficient pore accessibility, complex synthesis and toxicity issues. Here the association of non-toxic Zr-oxo clusters and feedstock isophthalic acid (IPA) via a Homometallic-Multicluster-Dot strategy results in a robust crystalline mesoporous MOF, denoted as MIP-206, that overcomes the aforementioned limitations. MIP-206, built up from an unprecedented combination of Zr6 and Zr12 oxo-cluster inorganic building units into a single structure, exhibits accessible meso-channels of ca. 2.6 nm and displays excellent chemical stability under different hydrolytic and harsh conditions. Owing to the abundant variety of functionalized IPA linkers, the chemical environment of MIP-206 can be easily tuned without hampering pore accessibility due to its large pore windows. As a result, MIP-206 loaded with palladium nanoparticles acts as an efficient and durable catalyst for the dehydrogenation of formic acid under mild conditions, outperforming benchmark mesoporous materials. This paves the way towards the utilization of MIP-206 as a robust mesoporous platform for a wide range of potential applications. 10.13140/RG.2.2.27305.21600

MOFs’ hydrolytic stability together with high versatility and modularity has promoted them as highly promising candidates for water-related applications of high societal interest and other emerging fields. S-shaped water isotherms and the finely tuned hydrophilic character of MOFs are key parameters for heat reallocation and water harvesting applications, while increased hydrophobicity is expected for separation occurring under wet conditions. Bearing suitable functional groups (e.g., –SO3H, –COOH, –NH2) that are geometrically precisely distributed, MOFs can show high proton conductivity outperforming benchmark materials. https://doi.org/10.1016/j.trechm.2020.09.004