jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Muhammad Usman Azam | Auguste Fernandes | Inês Graça | Waheed Afzal
Source: Fuel (article, 2023-05-22)
Field: Chemistry — Inorganic Chemistry

Hydrocracking of surgical face masks over Y Zeolites: Catalyst development, process design and life cycle assessment This study highlights the hydrocracking route for the management of surgical face masks, made of polypropylene, into liquid fuels. Hydrocracking experiments were performed at 325 ℃ and 10 bar cold H2 pressure over Ni-loaded HY and steamed HY zeolites. Ni-loaded steamed Y zeolite demonstrated to be the best catalyst leading to considerably high conversion (100 wt%) and selectivity to liquids (85.5 wt%). The increase in the external surface area and mesoporous volume that improved the bulk polymer molecules diffusion, combined with the uniformly dispersed Ni particles and the additionally generated Lewis acidity, were at the origin of the observed behaviour. This catalyst also showed reasonable stability and ability to be thermally regenerated. From the environmental perspective, life cycle assessment shows the benefits of hydrocracking over pyrolysis and incineration. Therefore, our results demonstrate that Ni-loaded steamed Y zeolites could be promising catalysts for the upcycling of surgical face masks to gasoline range fuels, with minimum environmental impacts. Catalysis ; Materials science ; Zeolite ; Chemical engineering ; Pyrolysis ; Incineration ; Cracking ; Polymer ; Mesoporous material ; Composite material ; Organic chemistry ; Waste management ; Chemistry Zeolite Catalysis and Synthesis ; Catalytic Processes in Materials Science ; Thermochemical Biomass Conversion Processes
Authors: Loutfy H. Madkour
Source: Journal of Materials Science and Engineering B (article, 2023-03-28)
Field: Materials Science — Materials Chemistry

Eco-friendly Green Biosynthesized Metallic Nanoparticles and Biotechnological Applications in Pharmaceuticals Sciences The next years will prove the importance of greensynthesis methods for MNPs and MONPs production because they are not only easy to execute, fast, and cheap but also less toxic and environmentally ecofriendly.Nanoparticle synthesis using microorganisms and plants by green synthesis technology is biologically safe, cost-effective, and environment-friendly. Plants and microorganisms have established the power to devour and accumulate inorganic metal ions from their neighboring niche.The biological entities are known to synthesize nanoparticles bothextra and intracellularly.The capability of a living system to utilize its intrinsic organic chemistry processes in remodeling inorganic metal ions into nanoparticles has opened up an undiscovered area of biochemical analysis.Metal nanoparticles (MNPs) and metal oxidenanoparticles (MONPs) are used in numerous fields.The new nano-based entities are being strongly generated and incorporated into everyday personal care products, cosmetics, medicines, drug delivery, and clothing toimpact industrial and manufacturing sectors, which means that nanomaterials commercialization and nanoassisted device will continuously grow.They can be prepared by many methods such as green synthesis and the conventional chemical synthesis methods.The green synthesis of nanoparticles (NPs) using living cells is a promising and novelty tool in bionanotechnology.Chemical and physical methods are used to synthesize NPs; however, biological methods are preferred due to its eco-friendly, clean, safe, cost effective, easy, and effective sources for high productivity and purity.Greensynthesis includes infinite accession to produce MNPs and MONPs with demanding properties.The structure-function relationships between nanomaterials and key information for life cycle evaluation lead to the production of high execution nanoscale materials that are gentle and environmentally friendly.Majority of plants have features as sustainable and renewable suppliers compared with microbes and enzymes, as they have the ability to pick up almost 75% of the light energy and transform it into chemical energy, contain chemicals like antioxidants and sugars, and play fundamental roles in the manufacture of nanoparticles.Plants considered the main factory for the green synthesis of MNPs and MONPs, and until now, different plant species have been used to study this, but the determined conditions should be taken into consideration to execute this preparation. Nanotechnology ; Environmentally friendly ; Biochemical engineering ; Nanoparticle ; Materials science ; Engineering ; Biology ; Ecology Nanoparticles: synthesis and applications
Authors: Xiaofei Sun | Peter W. Roesky
Source: Inorganic Chemistry Frontiers (article, 2023-01-01)
Field: Chemistry — Inorganic Chemistry

Group 14 metallole dianions as η<sup>5</sup>-coordinating ligands The coordination chemistry of group 14 metallole dianions, compared to monoanionic cyclopentadienides, is underexplored. This perspective reviews η 5 -coordination in group 14 metallole dianions, revealing their potential in organometallic chemistry. Coordination complex ; Chemistry ; Group (periodic table) ; Organometallic chemistry ; Group 2 organometallic chemistry ; Stereochemistry ; Medicinal chemistry ; Combinatorial chemistry ; Organic chemistry ; Crystal structure ; Molecule ; Metal Synthesis and characterization of novel inorganic/organometallic compounds ; Organometallic Complex Synthesis and Catalysis ; Coordination Chemistry and Organometallics
Authors: Márk Molnár | C. Oliver Kappe | Sándor B. Ötvös
Source: Advanced Synthesis & Catalysis (article, 2023-04-28)
Field: Chemistry — Organic Chemistry

Merger of Visible Light‐Driven Chiral Organocatalysis and Continuous Flow Chemistry: An Accelerated and Scalable Access into Enantioselective α‐Alkylation of Aldehydes The electron donor-acceptor complex-enabled asymmetric photochemical alkylation strategy holds potential to attain elusive chiral α-alkylated aldehydes without an external photoredox catalyst. The photosensitizer-free conditions are beneficial concerning process costs and sustainability. However, lengthy organocatalyst preparation steps as well as limited productivity and difficult scalability render the current approaches unsuitable for synthesis on enlarged scales. Inspired by these limitations, a protocol was developed for the enantioselective α-alkylation of aldehydes based on the synergistic combination of visible light-driven asymmetric organocatalysis and a controlled continuous flow reaction environment. With the aim to reduce process costs, a commercially available chiral catalyst has been exploited to achieve photosensitizer-free enantioselective α-alkylations using phenacyl bromide derivates as alkylating agents. As a result of elaborate optimization and process development, the present flow strategy furnishes an accelerated and inherently scalable entry into enantioenriched α-alkylated aldehydes including a chiral key intermediate of the antirheumatic esonarimod. Enantioselective synthesis ; Chemistry ; Alkylation ; Organocatalysis ; Combinatorial chemistry ; Catalysis ; Organic chemistry Radical Photochemical Reactions ; Innovative Microfluidic and Catalytic Techniques Innovation ; Sulfur-Based Synthesis Techniques
Authors: Yizhen Wan | Weiping Qian
Source: Biosensors (review, 2023-07-13)
Field: Materials Science — Materials Chemistry

From Self-Assembly of Colloidal Crystals toward Ordered Porous Layer Interferometry Interferometry-based, reflectometric, label-free biosensors have made significant progress in the analysis of molecular interactions after years of development. The design of interference substrates is a key research topic for these biosensors, and many studies have focused on porous films prepared by top-down methods such as porous silicon and anodic aluminum oxide. Lately, more research has been conducted on ordered porous layer interferometry (OPLI), which uses ordered porous colloidal crystal films as interference substrates. These films are made using self-assembly techniques, which is the bottom-up approach. They also offer several advantages for biosensing applications, such as budget cost, adjustable porosity, and high structural consistency. This review will briefly explain the fundamental components of self-assembled materials and thoroughly discuss various self-assembly techniques in depth. We will also summarize the latest studies that used the OPLI technique for label-free biosensing applications and divide them into several aspects for further discussion. Then, we will comprehensively evaluate the strengths and weaknesses of self-assembly techniques and discuss possible future research directions. Finally, we will outlook the upcoming challenges and opportunities for label-free biosensing using the OPLI technique. Biosensor ; Nanotechnology ; Porosity ; Interferometry ; Materials science ; Self-assembly ; Interference (communication) ; Computer science ; Telecommunications ; Optics ; Physics Anodic Oxide Films and Nanostructures ; Photonic Crystals and Applications ; Optical Coatings and Gratings
Authors: Ayesha Kausar | Ishaq Ahmad
Source: Journal of Composites Science (article, 2023-07-13)
Field: Materials Science — Biomaterials

Electrospinning Processing of Polymer/Nanocarbon Nanocomposite Nanofibers—Design, Features, and Technical Compliances Polymeric nanofibers have emerged as exclusive one-dimensional nanomaterials. Various polymeric nanofibers and nanocomposite nanofibers have been processed using the thermoplastic, conducting, and thermoset matrices. This review aims to highlight the worth of electrospinning technology for the processing of polymer/nanocarbon nanocomposite nanofibers. In this regard, the design, morphology, physical properties, and applications of the nanofibers were explored. The electrospun polymer/nanocarbon nanofibers have a large surface area and fine fiber orientation, alignment, and morphology. The fiber processing technique and parameters were found to affect the nanofiber morphology, diameter, and essential physical features such as electrical conductivity, mechanical properties, thermal stability, etc. The polymer nanocomposites with nanocarbon nanofillers (carbon nanotube, graphene, fullerene, etc.) were processed into high-performance nanofibers. Successively, the electrospun nanocomposite nanofibers were found to be useful for photovoltaics, supercapacitors, radiation shielding, and biomedical applications (tissue engineering, antimicrobials, etc.). Nanofiber ; Materials science ; Electrospinning ; Nanocomposite ; Polymer ; Carbon nanotube ; Thermal stability ; Carbon nanofiber ; Thermosetting polymer ; Composite material ; Nanomaterials ; Supercapacitor ; Nanotechnology ; Chemical engineering ; Electrochemistry Electrospun Nanofibers in Biomedical Applications ; Advanced Sensor and Energy Harvesting Materials ; Conducting polymers and applications
Authors: Elif Tezel | Dag Kristian Sannes | Stian Svelle | Petra Ágota Szilágyi | Unni Olsbye
Source: Materials Advances (review, 2023-01-01)
Field: Materials Science — Materials Chemistry

Direct CO<sub>2</sub> to methanol reduction on Zr<sub>6</sub>-MOF based composite catalysts: a critical review The pressing problem of climate change on account of anthropogenic greenhouse-gas emissions underlines the necessity for carbon capture and utilisation technologies. Greenhouse gas ; Methanol ; Carbon fibers ; Environmental science ; Reduction (mathematics) ; Materials science ; Composite number ; Climate change ; Catalysis ; Process engineering ; Chemical engineering ; Waste management ; Chemistry ; Engineering ; Composite material ; Geology Catalytic Processes in Materials Science ; Catalysts for Methane Reforming ; Catalysis and Hydrodesulfurization Studies
Authors: Jiawu Huang | Junjie Peng | Xuan Wei | Shengjun Du | Cuiting Yang | Jing Xiao
Source: AIChE Journal (article, 2023-01-10)
Field: Chemistry — Inorganic Chemistry

Synergetic thermodynamic/kinetic separation of <scp>C<sub>3</sub>H<sub>8</sub></scp>/<scp>CH<sub>3</sub>F</scp> on carbon adsorbents for ultrapure fluoromethane electronic gas Abstract Atomic layer etching (ALE) using the environmentally friendly electronic gas fluoromethane (CH 3 F) is guided for fabricating nanoscale electronic components. The adsorptive purification of CH 3 F provide a viable direction to remove trace amounts of impurities to produce highly pure CH 3 F (&gt;99.9999%) for the ALE process. Herein, to remove trace propane (~100 ppm) in CH 3 F, we report synergetic thermodynamic and kinetic separation of C 3 H 8 /CH 3 F over glucose‐derived carbon molecular sieve CMS‐T, (T as pyrolysis temperature). With pore size slightly larger than the kinetic diameter of C 3 H 8 , CMS‐600 allows both strong confined adsorption of C 3 H 8 and a higher diffusion rate of C 3 H 8 over CH 3 F, resulting in a remarkable separation factor of 51.1. Breakthrough experiment demonstrates a high dynamic production capacity of 457 L kg −1 of 7 N CH 3 F (&lt;100 ppb of C 3 H 8 ) over CMS‐600 with excellent cycling stability. Adsorption purification over carbon provides a feasible approach for industrial hyperpurification of electronic gas. Chemistry ; Adsorption ; Propane ; Pyrolysis ; Activated carbon ; Kinetic energy ; Molecular sieve ; Diffusion ; Carbon fibers ; Physical chemistry ; Analytical Chemistry (journal) ; Chromatography ; Organic chemistry ; Thermodynamics ; Materials science Inorganic Fluorides and Related Compounds ; Membrane Separation and Gas Transport ; Carbon Dioxide Capture Technologies
Authors: Alessandro Longo | Alessandro Mirone | Emmanuelle de Clermont Gallerande | Christoph J. Sahle | Maria Pia Casaletto | Lucia Amidani | Stavros Alexandros Theofanidis | Francesco Giannici
Source: Cell Reports Physical Science (article, 2023-11-22)
Field: Materials Science — Materials Chemistry

Oxygen vacancy clusters in bulk cerium oxide and the impact of gold atoms Ceria is important for catalysis due to its ability to form and utilize oxygen vacancies during redox reactions. Understanding the dynamic formation of the oxygen vacancies has contributed to the development of efficient catalytic processes. Here, we demonstrate the presence of oxygen vacancy clusters in the bulk of ceria and gold/ceria catalysts upon anaerobic carbon monoxide oxidation and describe their interplay with the orbital hybridization of Ce3+ 4f and 5d states. Observations are made using in situ X-ray Raman scattering spectroscopy at O K- and Ce N4,5-edges and in situ X-ray diffraction. These, combined with multiplet calculations, allow detection of the formation of Ce3+ in gold/ceria upon low temperature carbon monoxide oxidation. The modifications observed at the O K-edge reflect the rearrangement of the bulk oxygen sublattice. Density-functional theory calculations show vacancy ordering in the bulk, and explain modifications at the O K-edge, involving the hybridization of the Ce 4f and 5d and O 2p orbitals. Carbon monoxide ; Cerium ; Density functional theory ; Vacancy defect ; Catalysis ; Oxygen ; Raman spectroscopy ; Cerium oxide ; Chemistry ; Redox ; Oxide ; Inorganic chemistry ; Materials science ; Physical chemistry ; Chemical physics ; Crystallography ; Computational chemistry Catalytic Processes in Materials Science ; Catalysis and Oxidation Reactions ; Radioactive element chemistry and processing
Authors: Alicja Balcerak | Janina Kabatc | Zbigniew Czech | Marcin Bartkowiak
Source: Polymers (review, 2023-02-24)
Field: Chemistry — Organic Chemistry

Latest Advances in Highly Efficient Dye-Based Photoinitiating Systems for Radical Polymerization Light-activated polymerization is one of the most important and powerful strategies for fabrication of various types of advanced polymer materials. Because of many advantages, such as economy, efficiency, energy saving and being environmentally friendly, etc., photopolymerization is commonly used in different fields of science and technology. Generally, the initiation of polymerization reactions requires not only light energy but also the presence of a suitable photoinitiator (PI) in the photocurable composition. In recent years, dye-based photoinitiating systems have revolutionized and conquered the global market of innovative PIs. Since then, numerous photoinitiators for radical polymerization containing different organic dyes as light absorbers have been proposed. However, despite the large number of initiators designed, this topic is still relevant today. The interest towards dye-based photoinitiating systems continues to gain in importance, which is related to the need for new initiators capable of effectively initiating chain reactions under mild conditions. In this paper we present the most important information about photoinitiated radical polymerization. We describe the main directions for the application of this technique in various areas. Attention is mainly focused on the review of high-performance radical photoinitiators containing different sensitizers. Moreover, we present our latest achievements in the field of modern dye-based photoinitiating systems for the radical polymerization of acrylates. Photoinitiator ; Polymerization ; Photopolymer ; Radical polymerization ; Materials science ; Polymer ; Photochemistry ; Nanotechnology ; Polymer science ; Chemistry ; Monomer ; Composite material Photopolymerization techniques and applications ; Advanced Polymer Synthesis and Characterization ; Dental materials and restorations
Authors: Matteo Bevilacqua | Marco Roverso | Sara Bogialli | Claudia Graiff | Andrea Biffis
Source: Inorganic Chemistry (article, 2023-01-13)
Field: Materials Science — Materials Chemistry

From Au<sub>11</sub> to Au<sub>13</sub>: Tailored Synthesis of Superatomic Di-NHC/PPh<sub>3</sub>-Stabilized Molecular Gold Nanoclusters Herein, we report a new method to synthesize molecular gold nanoclusters (AuNCs) stabilized by phosphine (PR<sub>3</sub>) and di-N-heterocyclic carbene (di-NHC) ligands. The interaction of di-NHC gold(I) complexes, with the general formula [(di-NHC)Au<sub>2</sub>Cl<sub>2</sub>] with well-known [Au<sub>11</sub>(PPh<sub>3</sub>)<sub>8</sub>Cl<sub>2</sub>]Cl clusters provides three new classes of AuNCs through a controllable reaction sequence. The synthesis involves an initial ligand metathesis reaction to produce [Au<sub>11</sub>(di-NHC)(PPh<sub>3</sub>)<sub>6</sub>Cl<sub>2</sub>]<sup>+</sup> (type <b>1</b> clusters), followed by a thermally induced rearrangement/metal complex addition with the formation of Au<sub>13</sub> clusters [Au<sub>13</sub>(di-NHC)<sub>2</sub>(PPh<sub>3</sub>)<sub>4</sub>Cl<sub>4</sub>]<sup>+</sup> (type <b>2</b> clusters). Finally, an additional metathesis process yields [Au<sub>13</sub>(di-NHC)<sub>3</sub>(PPh<sub>3</sub>)<sub>3</sub>Cl<sub>3</sub>]<sup>2+</sup> (type <b>3</b> clusters). The electronic and steric properties of the employed di-NHC ligand affect the product distribution, leading to the isolation and full characterization of different clusters as the main product. A type <b>3</b> cluster has been also structurally characterized and was preliminarily found to be strongly emissive in solution. Chemistry ; Nanoclusters ; Carbene ; Ligand (biochemistry) ; Cluster (spacecraft) ; Phosphine ; Metathesis ; Steric effects ; Reactivity (psychology) ; Salt metathesis reaction ; Stereochemistry ; Crystallography ; Catalysis ; Organic chemistry Nanocluster Synthesis and Applications ; Organometallic Complex Synthesis and Catalysis ; Inorganic Chemistry and Materials
Authors: Ruyue Li | Yaqi Wang | Fei Zeng | Cuiqing Si | Dan Zhang | Wenbiao Xu | Junyou Shi
Source: International Journal of Molecular Sciences (review, 2023-10-17)
Field: Materials Science — Materials Chemistry

Advances in Polyoxometalates as Electron Mediators for Photocatalytic Dye Degradation The increasing concerns over the environment and the growing demand for sustainable water treatment technologies have sparked substantial interest in the field of photocatalytic dye removal. Polyoxometalates (POMs), known for their intricate metal-oxygen anion clusters, have received considerable attention due to their versatile structures, compositions, and efficient facilitation of photo-induced electron transfers. This paper provides an overview of the ongoing research progress in the realm of photocatalytic dye degradation utilizing POMs and their derivatives. The details encompass the compositions of catalysts, catalytic efficacy, and light absorption propensities, and the photocatalytic mechanisms inherent to POM-based materials for dye degradation are exhaustively expounded upon. This review not only contributes to a better understanding of the potential of POM-based materials in photocatalytic dye degradation, but also presents the advancements and future prospects in this domain of environmental remediation. Photocatalysis ; Degradation (telecommunications) ; Environmental remediation ; Nanotechnology ; Catalysis ; Materials science ; Chemistry ; Photochemistry ; Computer science ; Organic chemistry ; Contamination ; Telecommunications Polyoxometalates: Synthesis and Applications ; Advanced Photocatalysis Techniques ; TiO2 Photocatalysis and Solar Cells
Authors: Gérard Audran | Elena G. Bagryanskaya | Raphaël Bikanga | Michelle L. Coote | Olga Guselnikova | Chelsey L. Hammill | Sylvain R. A. Marque | Philippe Mellet | Павел С. Постников
Source: Progress in Polymer Science (article, 2023-07-05)
Field: Chemistry — Organic Chemistry

Dynamic Covalent Bond: Modes of Activation of the C—ON Bond in Alkoxyamines Covalent bond ; Dynamic covalent chemistry ; Polymerization ; Polymer ; Chemistry ; Bond cleavage ; Molecule ; Chemical bond ; Nitroxide mediated radical polymerization ; Surface plasmon resonance ; Radical polymerization ; Combinatorial chemistry ; Photochemistry ; Nanotechnology ; Polymer chemistry ; Materials science ; Computational chemistry ; Nanoparticle ; Organic chemistry ; Catalysis Advanced Polymer Synthesis and Characterization ; Synthetic Organic Chemistry Methods ; Conducting polymers and applications
Authors: Serafina Pacilio | Roberta Costa | Valentina Papa | Maria Teresa Rodia | Carlo Gotti | Giorgia Pagnotta | Giovanna Cenacchi | Maria Letizia Focarete
Source: Bioengineering (article, 2023-02-11)
Field: Materials Science — Biomaterials

Electrospun Poly(L-lactide-co-ε-caprolactone) Scaffold Potentiates C2C12 Myoblast Bioactivity and Acts as a Stimulus for Cell Commitment in Skeletal Muscle Myogenesis Tissue engineering combines a scaffold, cells and regulatory signals, reproducing a biomimetic extracellular matrix capable of supporting cell attachment and proliferation. We examined the role of an electrospun scaffold made of a biocompatible polymer during the myogenesis of skeletal muscle (SKM) as an alternative approach to tissue regeneration. The engineered nanostructure was obtained by electrospinning poly(L-lactide-co-ε-caprolactone) (PLCL) in the form of a 3D porous nanofibrous scaffold further coated with collagen. C2C12 were cultured on the PLCL scaffold, and cell morphology and differentiation pathways were thoroughly investigated. The functionalized PLCL scaffold recreated the SKM nanostructure and performed its biological functions, guiding myoblast morphogenesis and promoting cell differentiation until tissue formation. The scaffold enabled cell-cell interactions through the development of cellular adhesions that were fundamental during myoblast fusion and myotube formation. Expression of myogenic regulatory markers and muscle-specific proteins at different stages of myogenesis suggested that the PLCL scaffold enhanced myoblast differentiation within a shorter time frame. The functionalized PLCL scaffold impacts myoblast bioactivity and acts as a stimulus for cell commitment, surpassing traditional 2D cell culture techniques. We developed a screening model for tissue development and a device for tissue restoration. C2C12 ; Myogenesis ; Scaffold ; Myocyte ; Cell biology ; Extracellular matrix ; Skeletal muscle ; Tissue engineering ; Mesenchymal stem cell ; Chemistry ; Materials science ; Biomedical engineering ; Anatomy ; Biology ; Medicine Electrospun Nanofibers in Biomedical Applications ; Muscle Physiology and Disorders ; biodegradable polymer synthesis and properties