jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Radu Claudiu Fierăscu | Irina Fierăscu | Roxana Ioana Matei | Doina Mănăilă-Maximean
Source: Polymers (review, 2023-04-26)
Field: Materials Science — Biomaterials

Natural and Natural-Based Polymers: Recent Developments in Management of Emerging Pollutants Anthropogenic activities lead to the issue of new classes of pollutants in the environment that are not currently monitored in environmental studies. This category of pollutants (known as emerging contaminants) includes a very wide range of target substances, such as pharmaceuticals, plant protection products, personal care products, dyes, toxins, microplastics and many other industrially important intermediaries. Together with an increasing demand for clean water (both for agricultural necessities and for the increasing population consumption), the need for the removal of emerging pollutants, simultaneously with the current "green chemistry" approach, opens the door for the industrial application of natural polymers in the area of environmental protection. Recent developments in this area are presented in this paper, as well as the application of these particular natural materials for the removal of other contaminants of interest (such as radioisotopes and nanoparticles). The current knowledge regarding the processes' kinetics is briefly presented, as well as the future development perspectives in this area. Pollutant ; Microplastics ; Natural (archaeology) ; Environmental science ; Environmental protection ; Biochemical engineering ; Waste management ; Environmental planning ; Environmental chemistry ; Engineering ; Chemistry ; Geography biodegradable polymer synthesis and properties ; Nanoparticles: synthesis and applications ; Environmental Chemistry and Analysis
Authors: Hong‐Juan Lv | Shu‐Cong Fan | Yu‐Cheng Jiang | Shu-Ni Li | Quan‐Guo Zhai
Source: Inorganic Chemistry Frontiers (article, 2023-01-01)
Field: Chemistry — Inorganic Chemistry

Design of a robust rod-packing scandium–organic framework for C<sub>2</sub>H<sub><i>x</i></sub>/CO<sub>2</sub> separation, CO<sub>2</sub> storage, and catalytic CO<sub>2</sub> cycloaddition Reported herein is a highly stable rod-packing Sc-MOF with Lewis basic bare N sites and two types of open channels demonstrating a superior CO 2 storage capacity, a remarkable separation ability for CO 2 mixtures, and prominent catalytic CO 2 cycloaddition. Catalysis ; Scandium ; Materials science ; Chemical engineering ; Crystallography ; Chemistry ; Inorganic chemistry ; Organic chemistry ; Engineering Metal-Organic Frameworks: Synthesis and Applications ; Carbon dioxide utilization in catalysis ; CO2 Reduction Techniques and Catalysts
Authors: Achraf Delhali | Ayalew H. Assen | Aminat Mohammed | Karim Adil | Youssef Belmabkhout
Source: Scientific Reports (article, 2023-09-05)
Field: Chemistry — Inorganic Chemistry

Enabling simultaneous valorization of tannery effluent and waste plastic via sustainable preparation of Cr-BDC MOFs for water adsorption Abstract Advanced materials undergo a complex and lengthy process of maturation for scaling up and deployment, mainly due to the high cost of their precursors. Therefore, it is highly desirable to fabricate highly valuable advanced porous solid-state materials, with proven applicability, by sustainably combining organic and inorganic waste materials as precursors. This study successfully demonstrates the preparation of Cr-terephthalate Metal–Organic Frameworks (Cr-BDC MOFs) by combining metal salt and organic linker extracted from tannery effluent and waste plastic bottles. The waste from tanneries was used as the source of Cr(III), while terephthalic acid was obtained from the alkaline hydrolysis of plastic bottles. Appropriate extraction and assembly processes led to the functional Cr-BDC MOFs, MIL-101(Cr) and MIL-53(Cr). The prepared MOFs showed similar properties (surface area, hydrolytic and thermal stability, and water adsorption performance) to similar MOFs synthesized from pure commercial-grade precursors, as confirmed by N 2 sorption, XRD, TGA, and water adsorption experiments. The advancements made in this study represent significant progress in overcoming the bottleneck of MOF production cost efficiency via applying sustainability principles and pave the way for easy scaling-up and maturation of MOF-based processes, for air dehumidification and water harvesting as a case study. Terephthalic acid ; Adsorption ; Metal-organic framework ; Materials science ; Chemical engineering ; Effluent ; Extraction (chemistry) ; Waste management ; Chemistry ; Organic chemistry ; Polyester ; Composite material Metal-Organic Frameworks: Synthesis and Applications ; Adsorption and biosorption for pollutant removal ; Magnesium Oxide Properties and Applications
Authors: Yanxi Li | Yuhua Bai | Zhuozheng Wang | Qihan Gong | Mengchen Li | Yawen Bo | Hua Xu | Guiyuan Jiang | Kebin Chi
Source: Molecules (article, 2023-08-28)
Field: Chemistry — Inorganic Chemistry

Exquisitely Constructing a Robust MOF with Dual Pore Sizes for Efficient CO2 Capture Developing metal-organic framework (MOF) adsorbents with excellent performance and robust stability is of critical importance to reduce CO<sub>2</sub> emissions yet challenging. Herein, a robust ultra-microporous MOF, Cu(bpfb)(bdc), with mixed ligands of N, N'-(1,4-phenylene)diisonicotinamide (bpfb), and 1,4-dicarboxybenzene (bdc) was delicately constructed. Structurally, this material possesses double-interpenetrated frameworks formed by two staggered, independent frameworks, resulting in two types of narrow ultra-micropores of 3.4 × 5.0 and 4.2 × 12.8 Å<sup>2</sup>, respectively. The above structural properties make its highly selective separation at 273~298 K with a CO<sub>2</sub> capacity of 71.0~86.2 mg/g. Its adsorption heat over CO<sub>2</sub> and IAST selectivity were calculated to be 27 kJ/mol and 52.2, respectively. Remarkably, cyclic breakthrough experiments corroborate its impressive performance in CO<sub>2</sub>/N<sub>2</sub> separation in not only dry but also 75% RH humid conditions. Molecular simulation reveals that C-H···O<sub>CO2</sub> in the pores plays a pivotal role in the high selectivity of CO<sub>2</sub> adsorption. These results point out the huge potential application of this material for CO<sub>2</sub>/N<sub>2</sub> separation. Microporous material ; Selectivity ; Metal-organic framework ; Adsorption ; Chemical engineering ; Gas separation ; Materials science ; Chemistry ; Nanotechnology ; Physical chemistry ; Organic chemistry ; Membrane ; Catalysis Metal-Organic Frameworks: Synthesis and Applications ; Carbon Dioxide Capture Technologies ; Carbon dioxide utilization in catalysis
Authors: Aparna Tyagi | Neha Taneja | Jabir Khan | Chinmoy Kumar Hazra
Source: Advanced Synthesis & Catalysis (article, 2023-03-30)
Field: Chemistry — Organic Chemistry

I<sub>2</sub>‐Catalyzed/Mediated C−S and C−I Bond Formation: Solvent‐ and Metal‐Free Approach for the Synthesis of <i>β</i>‐Keto Sulfones and Branched Sulfones Abstract Herein, we report a solvent‐ and transition‐metal‐free, iodine‐catalyzed formation of C−S (sulfone) bonds for the synthesis of β ‐keto sulfones using readily accessible methyl ketones and sulfonyl hydrazides. This study also features the α ‐functionalization of β ‐keto sulfones to synthesize β ‐keto thiosulfones and α ‐iodo‐ β‐ keto sulfones via iodine‐catalyzed carbon‐sulfide (C−S) bond formation under solvent‐free conditions and iodine‐mediated C−I bond formation under aqueous conditions, respectively. The analytical studies and control experiments allow insights into a free‐radical coupling strategy. Overall, the presented protocol is operationally simple and scalable, has a broad range of functional group tolerance, and provides access to three functionalized organic scaffolds. magnified image Chemistry ; Catalysis ; Sulfone ; Sulfide ; Sulfonyl ; Aqueous solution ; Combinatorial chemistry ; Functional group ; Solvent ; Surface modification ; Transition metal ; Organic chemistry ; Alkyl Sulfur-Based Synthesis Techniques ; Radical Photochemical Reactions
Authors: Haiyang Wang | Ruijuan Yao | Ruiyin Zhang | Hao Ma | Jianjing Gao | Miaomiao Liang | Yuzhen Zhao | Zongcheng Miao
Source: Molecules (article, 2023-02-16)
Field: Materials Science — Materials Chemistry

CeO2-Supported TiO2−Pt Nanorod Composites as Efficient Catalysts for CO Oxidation Supported Pt-based catalysts have been identified as highly selective catalysts for CO oxidation, but their potential for applications has been hampered by the high cost and scarcity of Pt metals as well as aggregation problems at relatively high temperatures. In this work, nanorod structured (TiO<sub>2</sub>-Pt)/CeO<sub>2</sub> catalysts with the addition of 0.3 at% Pt and different atomic ratios of Ti were prepared through a combined dealloying and calcination method. XRD, XPS, SEM, TEM, and STEM measurements were used to confirm the phase composition, surface morphology, and structure of synthesized samples. After calcination treatment, Pt nanoparticles were semi-inlayed on the surface of the CeO<sub>2</sub> nanorod, and TiO<sub>2</sub> was highly dispersed into the catalyst system, resulting in the formation of (TiO<sub>2</sub>-Pt)/CeO<sub>2</sub> with high specific surface area and large pore volume. The unique structure can provide more reaction path and active sites for catalytic CO oxidation, thus contributing to the generation of catalysts with high catalytic activity. The outstanding catalytic performance is ascribed to the stable structure and proper TiO<sub>2</sub> doping as well as the combined effect of Pt, TiO<sub>2</sub>, and CeO<sub>2</sub>. The research results are of importance for further development of high catalytic performance nanoporous catalytic materials. Catalysis ; Calcination ; Nanorod ; Materials science ; Nanoporous ; Chemical engineering ; X-ray photoelectron spectroscopy ; Platinum ; Nanoparticle ; Nanotechnology ; Chemistry ; Organic chemistry Catalytic Processes in Materials Science ; Nanoporous metals and alloys ; Electrocatalysts for Energy Conversion
Authors: Alisha Sengupta | Gargee Roy | Aakash Ravikant Likhar | Deepak Asthana
Source: Nanoscale (review, 2023-01-01)
Field: Materials Science — Materials Chemistry

A supramolecular assembly-based strategy towards the generation and amplification of photon up-conversion and circularly polarized luminescence For the molecular properties in which energy transfer/migration is determinantal, such as triplet-triplet annihilation-based photon up-conversion (TTAUC), the overall performance is largely affected by the intermolecular distance and relative molecular orientations. In such scenarios, tools that may steer the intermolecular interactions and provide control over molecular organisation in the bulk, become most valuable. Often these non-covalent interactions, found predominantly in supramolecular assemblies, enable pre-programming of the molecular network in the assembled structures. In other words, by employing supramolecular chemistry principles, an arrangement where molecular units are arranged in a desired fashion, very much like a Lego toy, could be achieved. This leads to enhanced energy transfer from one molecule to other. In recent past, chiral luminescent systems have attracted huge attention for producing circularly polarized luminescence (CPL). In such systems, chirality is a necessary requirement. Chirality induction/transfer through supramolecular interactions has been known for a long time. It was realized recently that it may help in the generation and amplification of CPL signals as well. In this review article we have discussed the applicability of self-/co-assembly processes for achieving maximum TTA-UC and CPL in various molecular systems. Annihilation ; Intermolecular force ; Luminescence ; Supramolecular chemistry ; Photon ; Energy transfer ; Materials science ; Two-photon excitation microscopy ; Excitation ; Chemical physics ; Optoelectronics ; Molecular physics ; Photochemistry ; Chemistry ; Physics ; Molecule ; Optics ; Quantum mechanics Luminescence and Fluorescent Materials ; Synthesis and Properties of Aromatic Compounds ; Supramolecular Chemistry and Complexes
Authors: Yomaira Lisnedy Uscátegui Maldonado | Luis E. Díaz | Manuel F. Valero | Ericsson Coy‐Barrera
Source: Journal of materials research/Pratt's guide to venture capital sources (article, 2023-06-18)
Field: Materials Science — Polymers and Plastics

Synthesis and characterization of polyurethane films based on castor oil-derived polyols with heparin and low-molecular-weight chitosan for cardiovascular implants Abstract Applications of polyurethanes (PUs) depend on several physicochemical factors due to the presence of varied monomers involving several ratios. The present study aimed to synthesize various chitosan/heparin-inserted PUs to examine the addition effect on the mechanical and biological properties of the PU-based polymeric material. The PUs were synthesized from unmodified castor oil and isophorone diisocyanate, including chitosan and heparin as fillers. The FTIR, thermal, and mechanical characterization of materials with and without fillers exhibited properties that can be considered within the accepted values. In addition, considering the non-cytotoxicity and antibacterial activity, these synthesized polymers can be exploited as biomaterials. The results also showed that these PUs offer a competitive advantage over other materials since the observed good mechanical and biological properties were found to be within the optimal range for the biomaterial design to myocardial or vascular tissue engineering. Graphical abstract Isophorone diisocyanate ; Castor oil ; Polyurethane ; Materials science ; Chitosan ; Biomaterial ; Polymer ; Fourier transform infrared spectroscopy ; Monomer ; Chemical engineering ; Polymer chemistry ; Organic chemistry ; Composite material ; Nanotechnology ; Chemistry Polymer composites and self-healing ; Electrospun Nanofibers in Biomedical Applications ; Polymer Nanocomposites and Properties
Authors: Carla Rizzo | Andrea Pace | Ivana Pibiri | Silvestre Buscemi | Antonio Palumbo Piccionello
Source: ChemSusChem (article, 2023-12-23)
Field: Chemistry — Organic Chemistry

From Conventional to Sustainable Catalytic Approaches for Heterocycles Synthesis Synthesis of heterocyclic compounds is fundamental for all the research area in chemistry, from drug synthesis to material science. In this framework, catalysed synthetic methods are of great interest to effective reach such important building blocks. In this review, we will report on some selected examples from the last five years, of the major improvement in the field, focusing on the most important conventional catalytic systems, such as transition metals, organocatalysts, to more sustainable ones such as photocatalysts, iodine-catalysed reaction, electrochemical reactions and green innovative methods. Green chemistry ; Catalysis ; Nanotechnology ; Combinatorial chemistry ; Biochemical engineering ; Chemistry ; Organic synthesis ; Electrochemistry ; Transition metal ; Sustainable production ; Organic chemistry ; Reaction mechanism ; Materials science ; Production (economics) ; Engineering Catalytic C–H Functionalization Methods ; Sulfur-Based Synthesis Techniques ; Chemical Synthesis and Reactions
Authors: Le Liang | Lintong Wu | Peng Zheng | Tao Ding | Krishanu Ray | Ishan Barman
Source: JACS Au (article, 2023-03-29)
Field: Materials Science — Materials Chemistry

DNA-Patched Nanoparticles for the Self-Assembly of Colloidal Metamaterials Colloidal metamaterials are highly desired artificial materials that recapitulate the structure of simple molecules. They exhibit exceptional functionalities conferred by the organization of and specific interaction among constituent elements. Harvesting such exquisite attributes for potential applications necessitates establishing precise control over their structural configuration with high precision. Yet, creating molecule-like small clusters of colloidal metamaterials remains profoundly challenging, as a lack of regioselectively encoded surface chemical heterogeneity prevents specific recognition interactions. Herein, we report a new strategy by harnessing magnetic-bead-assisted DNA cluster transferring to create discretely DNA cluster-patched nanoparticles for the self-assembly of colloidal metamaterials. This strategy affords broad generalizability and scalability for robustly patching DNA clusters on nanoparticles unconstrained by geometrical, dimensional, and compositional complexities commonly encountered in colloidal materials at the nano- and microscale. We direct judiciously patched nanoparticles into a wide variety of nanoassemblies and present a case study demonstrating the distinct metamaterial properties in enhancing the spontaneous emission of diamond nanoparticles. This newly invented strategy is readily implementable and extendable to construct a palette of structurally sophisticated and functionality-explicit architecture, paving the way for nanoscale manipulation of colloidal material functionalities with wide-ranging applications for biological sensing, optical engineering, and catalytic chemistry. Nanotechnology ; Microscale chemistry ; Template ; Nanoparticle ; Metamaterial ; Materials science ; DNA origami ; Computer science ; Nanostructure Pickering emulsions and particle stabilization ; Gold and Silver Nanoparticles Synthesis and Applications ; Polymer Surface Interaction Studies
Authors: Simona Losio | Angelica Cifarelli | Adriano Vignali | Simona Tomaselli | Fabio Bertini
Source: Polymers (article, 2023-11-16)
Field: Materials Science — Polymers and Plastics

Flexible Polyurethane Foams from Bio-Based Polyols: Prepolymer Synthesis and Characterization Bio-polyols (BPOs), characterized by a hydroxyl number up to around 90 mg KOH/g, narrow polydispersity index and relatively low molecular mass up to 2000 g/mol, were synthetized from partially and completely epoxidized soybean and linseed oils and caprylic acid or 3-phenyl butyric acid. These BPOs were used in the presence of toluene diisocyanate to produce polyurethane (PU) foams by using a quasi-prepolymer method involving a two-step reaction. A detailed structural investigation of the prepolymers from toluene diisocyanate and both BPOs and polypropylene glycol was conducted by SEC and solution NMR. The apparent density of the foams was in the range of 40-90 kg/m<sup>3</sup>, with higher values for foams from the aromatic acid. All the foams showed an open-cell structure with uniform and regular shape and uniform size. The specific Young's moduli and compression deflection values suggest superior mechanical properties than the reference foams. The novel synthesized polyurethanes are excellent candidates to partially replace petroleum-based materials. Prepolymer ; Polyurethane ; Polypropylene glycol ; Materials science ; Toluene diisocyanate ; Isophorone diisocyanate ; Dispersity ; Polymer chemistry ; Isocyanate ; Chemical engineering ; Trimethylolpropane ; Toluene ; Hydroxyl value ; Polyol ; Composite material ; Organic chemistry ; Chemistry ; Polyethylene glycol Polymer composites and self-healing ; Carbon dioxide utilization in catalysis ; Synthetic Organic Chemistry Methods
Authors: Yuan‐Qiu‐Qiang Yi | Wenming Su
Source: Materials Chemistry Frontiers (article, 2023-01-01)
Field: Materials Science — Materials Chemistry

Cross-linking strategies for hole transport/emissive layers in quantum-dot light-emitting diodes To avoid the interlayer erosion challenge in the IJP process and direct patterning process of the QD emissive layer (EML), cross-linking strategies have been introduced to construct solvent-resistant films (hole transport layers or QD EMLs) upon exposure to heat or light. Quantum dot ; Materials science ; Optoelectronics ; Layer (electronics) ; Diode ; Construct (python library) ; Process (computing) ; Light-emitting diode ; Nanotechnology ; Computer science Quantum Dots Synthesis And Properties ; Semiconductor Quantum Structures and Devices ; GaN-based semiconductor devices and materials
Authors: Marianna Kocsis | Kornélia Baán | Sándor B. Ötvös | Ákos Kukovecz | Zoltán Kónya | Pál Sipos | István Pálinkó | Gábor Varga
Source: Catalysis Science & Technology (article, 2023-01-01)
Field: Chemistry — Organic Chemistry

Sustainable synthesis of azobenzenes, quinolines and quinoxalines <i>via</i> oxidative dehydrogenative couplings catalysed by reusable transition metal oxide–Bi(<scp>iii</scp>) cooperative catalysts Heterogeneous catalytic oxidative dehydrogenative processes for N-heterocycles are presented, which enable waste-minimized (additive-, oxidant-, base-free), efficient cyclisations/couplings via transition metal oxide–Bi( iii ) cooperative catalysis. Catalysis ; Transition metal ; Chemistry ; Oxidative phosphorylation ; Oxide ; Combinatorial chemistry ; Base (topology) ; Metal ; Organic chemistry Catalytic C–H Functionalization Methods ; Nanomaterials for catalytic reactions ; Synthesis and Biological Evaluation
Authors: Fayez Althobaiti | Ola A. Abu Ali | Islam Kamal | Mohammad Y. Alfaifi | Ali A. Shati | Eman Fayad | Serag Eldin I. Elbehairi | Reda F.M. Elshaarawy | Wesam Abd El‐Fattah
Source: Antibiotics (article, 2023-01-25)
Field: Materials Science — Materials Chemistry

New Ionic Liquid Microemulsion-Mediated Synthesis of Silver Nanoparticles for Skin Bacterial Infection Treatments This work reports a new approach for the synthesis of extremely small monodispersed silver nanoparticles (AgNPs) (2.9-1.5) by reduction of silver nitrate in a new series of benzyl alkyl imidazolium ionic liquids (BAIILs)-based microemulsions (3a-f) as media and stabilizing agents. Interestingly, AgNPs isolated from the IILMEs bearing the bulkiest substituents (<i>tert</i>-butyl and <i>n</i>-butyl) (3f) displayed almost no nanoparticle agglomeration. In an in vitro antibacterial test against ESKAPE pathogens, all AgNPs-BAIILs had potent antibiotic activity, as reflected by antibacterial efficiency indices. Furthermore, when compared to other nanoparticles, these were the most effective in preventing biofilm formation by the tested bacterial strains. Moreover, the MTT assay was used to determine the cytotoxicity of novel AgNPs-BAIILs on healthy human skin fibroblast (HSF) cell lines. The MTT assay revealed that novel AgNPs-BAIILs showed no significant toxic effects on the healthy cells. Thus, the novel AgNPs-BAIILs microemulsions could be used as safe antibiotics for skin bacterial infection treatments. AgNPs isolated from BAIIL (3c) was found to be the most effective antibiotic of the nanoparticles examined. Silver nanoparticle ; Microemulsion ; Chemistry ; Cytotoxicity ; Silver nitrate ; Antibacterial activity ; MTT assay ; Nuclear chemistry ; Nanoparticle ; In vitro ; Biofilm ; Salt (chemistry) ; Antibiotics ; Microbiology ; Bacteria ; Nanotechnology ; Organic chemistry ; Biochemistry ; Materials science ; Biology ; Pulmonary surfactant Nanoparticles: synthesis and applications ; Ionic liquids properties and applications