FRE IMAP 2000 : Institut des Matériaux Poreux de Paris

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A robust large-pore zirconium carboxylate metal–organic framework for energy-efficient water-sorption-driven refrigeration

Nature Energy 2018

 

The discovery of more-efficient and stable water adsorbents for adsorption-driven chillers for cooling applications remains a challenge due to the low working capacity of water sorption, high regeneration temperature, low energy efficiency under given operating conditions and the toxicity risk of harmful working fluids for the state-of-the-art sorbents. Here we report the water-sorption properties of a porous zirconium carboxylate metal–organic framework, MIP-200, which features S-shaped sorption isotherms, a high water uptake of 0.39 g g−1below P/P0 = 0.25, facile regeneration and stable cycling, and most importantly a notably high coefficient of performance of 0.78 for refrigeration at a low driving temperature (below 70 °C). A joint computational–experimental approach supports that MIP-200 may be a practical alternative to the current commercially available adsorbents for refrigeration when its water adsorption performance is combined with advantages such as the exceptional chemical and mechanical stability and the scalable synthesis that involves simple, cheap and green chemicals.

 

En direct de la FRE IMAP

Based on the success of the two previous EuroMOF conferences organized in Postdam (2015) and Delft (2017), more than 450 researchers in the field of MOFs, COFs and porous polymers from all over the world are expected to join us for a new edition of the EuroMOFs 2019 conference. The conference will be held in Paris (France) the 27th-30th of October 2019.

Internationally renown speakers have already accepted to give a Plenary or Keynote lecture which will certainly make this event a great success.

A young investigator symposium will be organized before the EuroMOFs conference while an industrial workshop will be held right after the conference.

Chairs : Dr. Christian Serre and Prof. Guillaume Maurin.

Nanoparticles of Metal-Organic Frameworks: On the Road to In Vivo Efficacy in Biomedicine

Adv. Mater. 2018, 1707365

 

In the past few years, numerous studies have demonstrated the great potential of nano particles of metal-organic frameworks (nanoMOFs) at the preclinical level for biomedical applications. Many of them were reported very recently based on their bioactive composition, anticancer application, or from a general drug delivery/theranostic perspective. In this review, the authors aim at providing a global view of the studies that evaluated MOFs’ biomedical applications at the preclinical stage, when in vivo tests are described either for pharmacological applications or for toxicity evaluation. The authors first describe the current surface engineering approaches that are crucial to understand the in vivo behavior of the nanoMOFs. Finally, after a detailed and comprehensive analysis of the in vivo studies reported with MOFs so far, and considering the general evolution of the drug delivery science, the authors suggest new directions for future research in the use of nanoMOFs for biomedical applications.

 

A phase transformable ultrastable titanium-carboxylate framework for photoconduction

Nature Communications9, 1660 (2018)

 

Porous titanium oxide materials are attractive for energy-related applications. However, many suffer from poor stability and crystallinity. Here we present a robust nanoporous metal–organic framework (MOF), comprising a Ti12O15 oxocluster and a tetracarboxylate ligand, achieved through a scalable synthesis. This material undergoes an unusual irreversible thermally induced phase transformation that generates a highly crystalline porous product with an infinite inorganic moiety of a very high condensation degree. Preliminary photophysical experiments indicate that the product after phase transformation exhibits photoconductive behavior, highlighting the impact of inorganic unit dimensionality on the alteration of physical properties. Introduction of a conductive polymer into its pores leads to a significant increase of the charge separation lifetime under irradiation. Additionally, the inorganic unit of this Ti-MOF can be easily modified via doping with other metal elements. The combined advantages of this compound make it a promising functional scaffold for practical applications.

 

Smart Metal-Organic-Framework Nanomaterial for Lung Targeting

Angew Chem Int Ed. 2017 Sep 28.

Despite high morbidity and mortality associated to lung diseases, addressing drugs towards lung tissue remains a pending task. Particle lung filtration has been proposed for passive lung targeting and drug delivery. However, toxic issues, derived from the long-term presence of the particles must be overcome. We show here that by exploiting some of the ignored properties of nanosized metal-organic frameworks it is possible to achieve impressive antitumoral effects on experimental lung tumours, even without the need to engineer the surface of the material. In fact, it was discovered that, based on unique pH-responsiveness and reversible aggregation behaviors, nanoMOF was capable to target the lung tissue. At the neutral pH of the blood, the nanoMOFs form aggregates with the adequate size to be retained within the lung capillaries. Then, within 24 h they disaggregate and release their drug payload. This phenomenon was compatible with lung tissue physiology.