Browsing Artículos by Title
Now showing items 6138-6157 of 10541
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Metal-Catalyzed C(sp2)−H Functionalization Processes of Phenylalanine- and Tyrosine-Containing Peptides
(Wiley, 2021-08-06)The site-selective chemical diversification of biomolecules constitutes an unmet challenge of capital importance within medicinal chemistry and chemical biology. The functionalization of otherwise unreactive C-H bonds holds ... -
Metal-Catalyzed Cascade Reactions between Alkynoic Acids and Dinucleophiles: A Review
(MDPI, 2023-02-28)Cascade reactions provide a straightforward access to many valuable compounds and reduce considerably the number of steps of a synthetic sequence. Among the domino and multicomponent processes that involve alkynes, the ... -
Metal-catalyzed C–H functionalization processes upon “click”-triazole assistance
(Wiley, 2018-08-24)The functionalization of otherwise unreactive C–H bonds holds great promise for reducing the reliance on existing functional groups while improving energy efficiency and atom-economy. One of the most powerful strategies ... -
Metal-Doped HZSM-5 Zeolite Catalysts for Catalytic Cracking of Raw Bio-Oil: Exploring Activity toward Value-Added Products
(MDPI, 2023-08-10)Catalytic cracking of bio-oil, conducted at atmospheric pressure without hydrogen supply, is a cost-effective and versatile approach for the targeted synthesis of biofuels and platform chemicals. The conversion of raw ... -
Metal-free initiators pave the way for chemically recyclable polymers with industrially relevant properties
(Nature, 2023)To solve the environmental disaster that is generated by legacy plastics accumulation, researchers are looking to design plastics with enhanced end-of-life options, but many circular plastics do not meet industrial ... -
Metal-Free Polymethyl Methacrylate (PMMA) Nanoparticles by Enamine "Click" Chemistry at Room Temperature
(MDPI, 2011-12)"Click" chemistry has become an efficient avenue to unimolecular polymeric nanoparticles through the self-crosslinking of individual polymer chains containing appropriate functional groups. Herein we report the synthesis ... -
Metal-organic aerogels based on titanium(IV) for visible-light conducted CO2 photoreduction to alcohols
(Elsevier, 2022-12)Metal-organic frameworks (MOFs) imply an appealing source of photocatalysts as they combine porosity with tailorable electronic properties and surface chemistry. Herein, we report a series of unprecedented metal-organic ... -
Metal-Organic Enzyme Nanogels as Nanointegrated Self-Reporting Chemobiosensors
(American Chemical Society, 2022)[EN] A fluorometric glucose biosensor based on fine-tuned chemoenzymatic nanohybrids is herein proposed. The successful integration of an engineered glucose oxidase enzyme and an optically responsive polymeric nanogel in ... -
Metal-Organic Frameworks and Zeolite Materials As Active Fillers for Lithium-Ion Battery Solid Polymer Electrolytes
(Royal Society Of Chemistry, 2021-06-21)The efforts to decarbonize the economies, with particular focus on renewable energies, must be accompanied by the development of more efficient and environmentally friendlier energy storage systems. In this context, all ... -
Metal-Organic Frameworks Based on a Janus-Head Biquinoline Ligand as Catalysts in the Transformation of Carbonyl Compounds into Cyanohydrins and Alcohols
(American Chemical Society, 2022-11)A new family of metal–organic frameworks (MOFs) named GR-MOFs with the chemical formula {[Mx(BCA)y](H2O)z(DMF)w} (x,y,z,w: 1,1,2,0; 1,1.5,0,1; 1,2,2,1; and 1,1,0,2 for GR-MOF-11 to 14, respectively) based on s-block [M: ... -
Metallic Copper (Cu[0]) Obtained from Cu2+-Rich Acidic Mine Waters by Two Different Reduction Methods: Crystallographic and Geochemical Aspects
(MDPI, 2022-03-04)The recovery of valuable metals from different types of wastes has become of prime strategic interest given the scarcity of primary critical raw materials at international scale. Implementation of new methods or refinement ... -
Metallic Glass/PVDF Magnetoelectric Laminates for Resonant Sensors and Actuators: A Review
(MDPI, 2017-05-31)Among magnetoelectric (ME) heterostructures, ME laminates of the type Metglas-like/PVDF (magnetostrictive+piezoelectric constituents) have shown the highest induced ME voltages, usually detected at the magnetoelastic ... -
Metallic thin films on stepped surfaces: lateral scattering of quantum well states
(IOP Publishing, 2014-12-10)Quantum well states of Ag films grown on stepped Au(111) surfaces are shown to undergo lateral scattering, in analogy with surface states of vicinal Ag(111). Applying angle resolved photoemission spectroscopy we observe ... -
Metals and metalloids in high-altitude Pyrenean lakes: sources and distribution in pre-industrial and modern sediments
(Springer, 2023-07)High-altitude Pyrenean lakes are ecosystems far from local pollution sources, and thus they are particularly sensitive to the atmospheric deposition of metals and metalloids. This study aims to quantify the effect of human ... -
Metals, nonmetals and metalloids in cigarette smoke as hazardous compounds for human health
(Elsevier, 2024-05)Cigarette smoke contains many chemicals that are harmful to both smokers and non-smokers. Breathing just a little cigarette smoke can be harmful. There are >7000 chemicals in cigarette smoke, at least 250 are known to be ... -
Metal–Polymer Heterojunction in Colloidal-Phase Plasmonic Catalysis
(American Chemical Society, 2022-03-03)[EN] Plasmonic catalysis in the colloidal phase requires robust surface ligands that prevent particles from aggregation in adverse chemical environments and allow carrier flow from reagents to nanoparticles. This work ... -
Metamodels’ Development for High Pressure Die Casting of Aluminum Alloy
(MDPI, 2021-10-31)Simulation is a very useful tool in the design of the part and process conditions of high-pressure die casting (HPDC), due to the intrinsic complexity of this manufacturing process. Usually, physics-based models solved by ... -
Metamorphosis of a Commodity Plastic like PVC to Efficient Catalytic Single-Chain Nanoparticles
(Wiley, 2023-11)We perform the conversion of a commodity plastic of common use in pipes, window frames, medical devices, flexible hoses, etc. like polyvinyl chloride (PVC) to single-chain nanoparticles (SCNPs). SCNPs are versatile, ... -
Metasomatic effect of Li-bearing aplite-pegmatites on psammitic and pelitic metasediments: Geochemical constraints on critical raw material exploration at the Fregeneda-Almendra Pegmatite Field (Spain and Portugal)
(Elsevier, 2022-11)Fluid-assisted mass transfer and re-equilibration of mineral phases are common consequences of metasomatism associated with igneous intrusions. The addition and/or removal of chemical components in these environments may ... -
Metastable Resting State Brain Dynamics
(Frontiers Media, 2019-09)Metastability refers to the fact that the state of a dynamical system spends a large amount of time in a restricted region of its available phase space before a transition takes place, bringing the system into another state ...