Search Results - "Comptes Rendus. Chimie"

The pollution of water resources by hazardous contaminants is a major obstacle to the provision of safe and potable water worldwide. Cost-effective, innovative, renewable, and environmentally friendly technologies are essential for wastewater treatment. In the current work, the potential of using ra...

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The overall performance of hydrometallurgical leaching operations can be limited by the presence of various types of insoluble layers coating the surface of the treated solids. The attrition-leaching process, which is carried out in a stirred reactor containing millimetric beads, can partially overc...

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A new generation of ecocatalysts$^{\text{®}}$ derived from Invasive Alien Species (IAS) (Fallopia japonica and Arundo donax) was used as starting material for the preparation of novel biosourced catalysts. The preparation of these ecocatalysts$^{\text{®}}$ is a new way to support the management of I...

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Organofluorine chemistry is a research field of rapid expansion. Due to the unique properties of the fluorine atom and the fluorinated residues, innovation is required to push forward the boundaries of this very active research field by expanding the toolbox for emerging fluorinated groups. In this...

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Recent developments in asymmetric catalysis involve the heterogeneization of chiral complexes so that they can be easily immobilized on different supports. This account focuses on procedures that lead to the formation of non-covalent interactions between the chiral active sites and the chosen suppor...

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A series of solid-state structures of gold(I) complexes using the semi-rigid cis-1,2- bis(diphenylphosphino)ethene (= cis-bdppe) ligand are reported. The proximity of the phosphine donor atoms of the bidentate ligand framework greatly favors formation of mononuclear over di- nuclear complexes. Struc...

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Intensive landscape modifications have led to the loss of floral resources, partly in early spring when bumble bee queens need suitable pollen to establish their brood. Adequate floral resources are also crucial to mitigate parasite infection, a stress compromising reproductive success. Among early...

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Recent advances in machine learning offer powerful tools for exploring complex reaction mechanisms in condensed phases via reactive simulations. In this tutorial review, we describe the key challenges associated with simulating reactions in condensed phases, we introduce neural network potentials an...

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In the quest for molecular complexity, the direct and selective functionalization of C(sp3) centers is of paramount importance. As sulfur- and/or fluorine-containing molecules are particularly important, the development of methods to (regio)selectively introduce moieties containing these atoms on a...

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Bioethanol production from water hyacinth pretreated thermochemically through boiling in water with or without sodium chlorite, followed by fermentation with a locally isolated thermophilic bacteria consortium in a partially consolidated bioprocessing was investigated. The time yielding the maximum...

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A new route for the synthesis of meso-(pyridin-2-ylmethyl)porphyrins was developed, based on the nucleophilic attack of (pyridin-2-ylmethyl)lithium reagent on a porphyrin bearing one free meso position. The latter is then metalated with Zn(II) and Ni(II). These products were characterized by NMR spe...

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The access to a novel variety of 4-fluorinated isoxazoles bearing an aryl or alkyl group at the C-3 position and an acetal fragment at the C-5 position has been achieved through a direct fluorination using N-fluorobenzenesulfonimide (NFSI) with yields up to 75%. This method was transposed to gram-sc...

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Biocatalysis has gained attention in recent decades as a green and efficient method for producing high-value chemicals. Enzymes, notably due to their high selectivity, offer significant advantages for organic synthesis. However, industrial implementation remains limited owing to challenges such as f...

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In this article, we present a novel and sustainable approach for recycling printed circuit boards (PCBs), potentially enabling the complete transformation of collected waste into reusable raw materials. Our methodology starts with the disassembly of PCBs for the extraction of all electronic componen...

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Onion is not just an edible food compound but its seeds can also be an important source of valuable oil with various sensitive applications mainly in pharmaceutical, cosmetic and food fields. This has encouraged the use of a sustainable extraction technique like the supercritical CO2 extraction of o...

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Although complexes of the paramagnetic Gd(III) ion have been used with great success for the past 40 years to enhance image contrast in magnetic resonance imaging (MRI), important challenges such as improving the relaxation efficacy, the specificity, the safety, and the environmental impact of these...

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Polyoxometalates (POMs) are molecular nano-oxides of early transition metals. As molecular oxides, they are endowed with remarkable redox properties, combining the reducibility of bulk metal oxides and the high versatility of molecular species. They undergo successive, reversible, and highly adjusta...

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The development of efficient biocatalysts requires the detection and quantification of proven enzymatic activities on natural substrates. Electrochemical methods are particularly suitable for monitoring redox enzymatic activities when the substrates or products are electroactive species. These metho...

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To reduce their dependence on fossil fuels, many countries have embarked on transitions in their energy systems, notably by deploying solar and wind farms. These new sources require the construction of a system of flexibilities capable of integrating their fatal and intermittent production into the...

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