Une avancée pour purifier l’air intérieur : des matériaux prometteurs contre le formaldéhyde

Le formaldéhyde pollue l’air intérieur, car il est utilisé pour conserver le mobilier et les vêtements lors des longs voyages en bateau depuis leurs lieux de production. Il est très nocif pour la santé, mais les filtres à air le retiennent mal. De nouveaux matériaux, poreux à toute petite échelle, agissent comme des éponges et montrent une bonne efficacité de capture de ce polluant.

Le lien vers l’article complet

MOF-Enhanced Phototherapeutic Wound Dressings Against Drug-Resistant Bacteria

Full article HERE!!
And you can also check out his very exhaustive review on Iron-MOFs for Biomedical Applications

Abstract MOF-Enhanced Phototherapeutic Wound Dressings Against Drug-Resistant Bacteria:
Phototherapy is a low-risk alternative to traditional antibiotics against drug-resistant bacterial infections. However, optimizing phototherapy agents, refining treatment conditions, and addressing misuse of agents, remain a formidable challenge. This study introduces a novel concept leveraging the unique customizability of metal–organic frameworks (MOFs) to house size-matched dye molecules in “single rooms”. The mesoporous iron(III) carboxylate nanoMOF, MIL-100(Fe), and the hydrophobic heptamethine cyanine photothermal dye (Cy7), IR775, are selected as model systems. Their combination is predicted to minimize dye–dye interactions, leading to exceptional photostability and efficient light-to-heat conversion. Furthermore, MIL-100(Fe) preserves the antimicrobial nature of hydrophobic IR775, enabling it to disrupt bacterial cell envelopes. Through electrospinning, MIL-100(Fe)@IR775 nanoparticles are shaped into a gelatin-based film dressing for the treatment of skin wounds infected by Methicillin-resistant Staphylococcus aureus (MRSA). Activation of the dressing requires only a portable near-infrared light-emitting diode (NIR LED) and induces both low-dose photodynamic therapy (LPDT) and mild-temperature photothermal therapy (MPTT). Combined with the antimicrobial properties of IR775 and ferroptosis-like lipid peroxidation induced by MIL-100(Fe), the photoactive dressing eradicates MRSA and the healing is as quick as the uninfected wounds. This safe, cost-effective, and multifunctional therapeutic wound dressing offers a promising solution to overcome the current bottleneck in phototherapy.

Une journaliste du Monde des Grandes Ecoles visite l’IMAP

Le point commun entre la capture du CO2, la libération contrôlée de médicaments et la détection des composés organovolatils ?
L’utilisation et la synthétisation de molécules dont l’Institut des Matériaux Poreux de Paris a fait sa spécialité. L’Université PSL nous a ouvert les portes de ce laboratoire universitaire unique en son genre.
L’article du Monde des Grandes Ecoles vient d’être publié.
Voici le lien vers la version web : https://www.mondedesgrandesecoles.fr/reportage-plongee-dans-les-coulisses-dun-laboratoire-de-luniversite-psl/ et un aperçu de la version print : https://drive.google.com/file/d/1JCVnJ6ppdo2RpQK4Vq8Z7U9bJNrIbLEx/view?usp=sharing

A holistic platform for accelerating sorbent-based carbon capture

Find more about the latest IMAP’s collaborative work here:
https://www.nature.com/articles/s41586-024-07683-8

Abstract:
Reducing carbon dioxide (CO2) emissions urgently requires the large-scale deployment of carbon-capture technologies. These technologies must separate CO2 from various sources and deliver it to different sinks1,2. The quest for optimal solutions for specific source–sink pairs is a complex, multi-objective challenge involving multiple stakeholders and depends on social, economic and regional contexts. Currently, research follows a sequential approach: chemists focus on materials design3 and engineers on optimizing processes4,5, which are then operated at a scale that impacts the economy and the environment. Assessing these impacts, such as the greenhouse gas emissions over the plant’s lifetime, is typically one of the final steps6. Here we introduce the PrISMa (Process-Informed design of tailor-made Sorbent Materials) platform, which integrates materials, process design, techno-economics and life-cycle assessment. We compare more than 60 case studies capturing CO2 from various sources in 5 global regions using different technologies. The platform simultaneously informs various stakeholders about the cost-effectiveness of technologies, process configurations and locations, reveals the molecular characteristics of the top-performing sorbents, and provides insights on environmental impacts, co-benefits and trade-offs. By uniting stakeholders at an early research stage, PrISMa accelerates carbon-capture technology development during this critical period as we aim for a net-zero world.

New article: Room Temperature Reduction of Nitrogen Oxide on Iron Metal-Organic Frameworks

Nitrogen oxides represent one of the main threats for the environment. Despite decades of intensive research efforts, a sustainable solution for NOx removal under environmental conditions is still undefined. Using theoretical modelling, material design, state-of-the-art investigation methods and mimicking enzymes, we have found that selected porous hybrid iron(II/III) based MOF material are able to decompose NOx, at room temperature, in the presence of water and oxygen, into N2 and O2 and without reducing agents. This paves the way to the development of new highly sustainable heterogeneous catalysts to improve air quality.

https://onlinelibrary.wiley.com/doi/10.1002/adma.202403053

New IMAP paper on scalable & cost-effective MOF for CO2 capture

A Scalable Robust Microporous Al-MOF for Post-Combustion Carbon Capture

Bingbing Chen, Dong Fan, Rosana V. Pinto, Iurii Dovgaliuk, Shyamapada Nandi, Debanjan Chakraborty,…, Farid Nouar, Guillaume Maurin, Georges Mouchaham, Christian Serre

First published: 25 March 2024 https://doi.org/10.1002/advs.202401070

Herein, a robust microporous aluminum tetracarboxylate framework, MIL-120(Al)-AP, (MIL, AP: Institute Lavoisier and Ambient Pressure synthesis, respectively) is reported, which exhibits high CO2 uptake (1.9 mmol g−1 at 0.1 bar, 298 K). In situ Synchrotron X-ray diffraction measurements together with Monte Carlo simulations reveal that this structure offers a favorable CO2 capture configuration with the pores being decorated with a high density of µ2-OH groups and accessible aromatic rings. Meanwhile, based on calculations and experimental evidence, moderate host-guest interactions Qst (CO2) value of MIL-120(Al)-AP (−40 kJ mol−1) is deduced, suggesting a relatively low energy penalty for full regeneration. Moreover, an environmentally friendly ambient pressure green route, relying on inexpensive raw materials, is developed to prepare MIL-120(Al)-AP at the kilogram scale with a high yield while the Metal- Organic Framework (MOF) is further shaped with inorganic binders as millimeter-sized mechanically stable beads. First evidences of its efficient CO2/N2 separation ability are validated by breakthrough experiments while operando IR experiments indicate a kinetically favorable CO2 adsorption over water. Finally, a techno-economic analysis gives an estimated production cost of ≈ 13 $ kg−1, significantly lower than for other benchmark MOFs. These advancements make MIL-120(Al)-AP an excellent candidate as an adsorbent for industrial-scale CO2 capture processes.

A microporous multi-cage metal-organic framework for an effective one-step separation of branched alkanes feeds

The improvement of the Total Isomerization Process (TIP) for the production of high-quality gasoline with the ultimate goal of reaching a Research Octane Number (RON) higher than 92 requires the use of specific sorbents to separate pentane and hexane isomers into classes of linear, mono- and di-branched isomers. Herein we report the design of a new multi-cage microporous Fe(III)-MOF (referred to as MIP-214, MIP stands for materials of the Institute of Porous Materials of Paris) with a flu-e topology, incorporating an asymmetric heterofunctional ditopic ligand, 4-pyrazolecarboxylic acid, that exhibits an appropriate microporous structure for a thermodynamic-controlled separation of hydrocarbon isomers. This MOF produced via a direct, scalable, and mild synthesis route was proven to encompass a unique separation of C5/C6 isomers by classes of low RON over high RON alkanes with a sorption hierarchy: (n-hexane >> n-pentane ≈ 2-methylpentane > 3-methylpentane)low RON>>(2,3-dimethylbutane ≈ i-pentane ≈ 2,2-dimethylbutane)high RON following the adsorption enthalpy sequence. We reveal for the first time that a single sorbent can efficiently separate such a complex mixture of high RON di-branched hexane and mono-branched pentane isomers from their low RON counterparts, which is a major achievement reported so far.

First published in Angewandte Chemie on 15 February 2024, here: https://doi.org/10.1002/anie.202320008
by Lin Zhou, Pedro Brantuas, Adriano Henrique, Helge Reinsch, Mohammad Wahiduzzaman, Jean-Marc Grenèche, Alirio Rodrigues, José Silva, Guillaume Maurin, Christian Serre

Webinar RSC porous solids – January 25th 2024 5-6 pm

For those who are interested : https://rsc.zoom.us/webinar/register/7917043887917/WN_x0lk673UR86HKAs19XErjw#/registration
Topic: RSC Desktop Seminar: Porous Materials
Register in advance for this webinar:
https://rsc.zoom.us/webinar/register/WN_x0lk673UR86HKAs19XErjw

After registering, you will receive a confirmation email containing information about joining the webinar.
The Royal Society of Chemistry invites you to attend the latest in our series of RSC Desktop Seminars.

This 60 minute webinar will focus on porous materials, and will feature two talks followed by a discussion and Q&A.

Guest speakers:

Prof. Dr. Bettina Lotsch (Max Planck Institute)
« Covalent Organic Frameworks for Solar Energy Conversion: From Design to Function »

Dr. Christian Serre (CNRS)
« Ambient pressure green synthesis of robust MOFs »

Please see speakers section below for more information, as updated.

This webinar is free to attend wherever you are, and can be watched either live or on-demand at a time that’s convenient to you.

We hope you can join us!