jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Abdallah Amedlous | Charly Hélaine | Rémy Guillet‐Nicolas | Oleg I. Lebedev | Samuel Valable | Svetlana Mintova
Source: Inorganic Chemistry Frontiers (article, 2023-01-01)
Field: Chemistry — Inorganic Chemistry

Gadolinium-loaded LTL nanosized zeolite for efficient oxygen delivery and magnetic resonance imaging The search for efficient gas carriers for biomedical applications presents a challenging task due to the kinetics of gas adsorption/desorption. This article presents a novel approach utilizing Gd-LTL zeolite crystals for oxygen delivery combined with an MRI study. Zeolite ; Gadolinium ; Materials science ; Adsorption ; Oxygen ; Magnetic resonance imaging ; Desorption ; Kinetics ; Nuclear magnetic resonance ; Chemical engineering ; Chemistry ; Catalysis ; Physical chemistry ; Organic chemistry ; Medicine ; Physics ; Radiology ; Engineering Zeolite Catalysis and Synthesis ; Metal-Organic Frameworks: Synthesis and Applications ; Catalytic Processes in Materials Science
Authors: Asima Munawar | Logan T. Maltz | Wei‐Chun Liu | François P. Gabbaı̈
Source: Organometallics (article, 2023-09-18)
Field: Chemistry — Organic Chemistry

Synthesis of an Indazole/Indazolium Phosphine Ligand Scaffold and Its Application in Gold(I) Catalysis Advances in ligand development have allowed for the fine-tuning of gold catalysis. To contribute to this field, we designed an indazole phosphine ligand scaffold that allows facile introduction of cationic charge through methylation. With minimal changes to the structure upon methylation, we could assess the importance of the electronic effects of the insertion of a positive charge on the catalytic activity of the resulting gold(I) complex. Using the benchmark reactions of propargyl amide cyclization and enyne cyclization with and without hexafluoroisopropanol (HFIP), we observed marked differences in the catalytic activities of the neutral and cationic gold species. Chemistry ; Indazole ; Phosphine ; Enyne ; Propargyl ; Cationic polymerization ; Ligand (biochemistry) ; Catalysis ; Combinatorial chemistry ; Medicinal chemistry ; Stereochemistry ; Organic chemistry ; Receptor Catalytic Alkyne Reactions ; Organometallic Complex Synthesis and Catalysis ; Asymmetric Hydrogenation and Catalysis
Authors: Sophia C. Kosloski-Oh | Kai D. Knight | Megan E. Fieser
Source: Inorganic Chemistry (article, 2023-12-08)
Field: Chemistry — Organic Chemistry

Enhanced Control of Isoprene Polymerization with Trialkyl Rare Earth Metal Complexes through Neutral Donor Support The development of catalysts for stereospecific polymerization of 1,3-dienes is an area of interest due to the robust nature of poly(1,3-diene)s' physical and mechanical properties, as well as the material's versatility in many applications. Dialkyl rare earth metal complexes supported by a diverse cast of ligand frameworks are selective for the polymerization of 1,3-dienes and are an exciting option for examination. However, development in this area has been hampered by the focus on complex catalyst systems that are costly to make. In this study, we synthesize a series of simple homoleptic trialkyl rare earth metal precatalysts and highlight their efficacy for isoprene polymerization using 1 or 2 equiv of [Ph<sub>3</sub>C][B(C<sub>6</sub>F<sub>5</sub>)<sub>4</sub>] activator. We investigated the addition of commercially available in situ donors, leading to the identification of triphenylphosphine as an ideal support to enhance the dispersity control and prevent loss of catalyst activity. We demonstrated how the activation and reaction conditions, including the order/time of reagent addition and donor electronics, had a major impact on the rate, control, and selectivity for the polymerization of 1,3-dienes. Further interrogation of the catalyst system signals the crucial role of triphenylphosphine in providing enhanced stability and control in this living catalyst system. Chemistry ; Homoleptic ; Isoprene ; Polymerization ; Catalysis ; Reagent ; Triphenylphosphine ; Dispersity ; Combinatorial chemistry ; Metal ; Polymer chemistry ; Organic chemistry ; Copolymer ; Polymer Organometallic Complex Synthesis and Catalysis ; Organoboron and organosilicon chemistry ; Synthetic Organic Chemistry Methods
Authors: Kun Li | Zhihao Yu | Iurii Dovgaliuk | Clémence Le Cœur | Viviane Lutz‐Bueno | Éric Leroy | Blandine Brissault | Yoann de Rancourt de Mimérand | Mathilde Lepoitevin | Christian Serre | Jacques Penelle | Benoît Couturaud
Source: Chemical Communications (article, 2023-01-01)
Field: Chemistry — Inorganic Chemistry

Polymer–metal–organic framework self-assembly (PMOFSA) as a robust one-step method to generate well-dispersed hybrid nanoparticles in water A new process, PMOFSA, is described here, that opens the way for the one-pot straightforward and versatile manufacture of polymer-MOF nanoparticles in water. It can be expected that this study will not only expand the scope of <i>in situ</i> preparation of polymer-MOF nano-objects but also inspire researchers in the field to prepare a new generation of polymer-MOF hybrid materials. Polymer ; Materials science ; Nanoparticle ; Nanotechnology ; Scope (computer science) ; Self-assembly ; Computer science ; Composite material Metal-Organic Frameworks: Synthesis and Applications ; MXene and MAX Phase Materials ; Membrane Separation and Gas Transport
Authors: Sergey V. Zubkevich | Vladislav А. Тuskaev | Svetlana Gagieva | Alexander A. Pavlov | Victor N. Khrustalev | Fei Wang | Li Pan | Yue‐Sheng Li | Daniele Saracheno | Anton A. Vikhrov | Dmitry N. Zarubin | Boris M. Bulychev
Source: Chinese Journal of Chemistry (article, 2023-05-31)
Field: Chemistry — Organic Chemistry

Trapping the <scp>Short‐Chain</scp> Odd Carbon Number Olefins Using Nickel( <scp>II</scp> )‐Catalyzed Tandem Ethylene Oligomerization and <scp>Friedel‐Crafts</scp> Alkylation of Toluene Comprehensive Summary Nickel(II) complexes with pyrazole‐based ligands are widely employed in catalysis of ethylene oligomerization and subsequent Friedel‐Crafts alkylation of toluene. We have prepared ten new nickel(II) dibromide complexes with various substituted bis(azolyl)methanes. They have been characterized using 1 H NMR, IR, high resolution mass spectrometry and elemental analysis. The structures of three complexes have been unambiguously established using X‐ray diffraction. It was found that these complexes in the presence of Et 2 AlCl or Et 3 Al 2 Cl 3 are active both in ethylene oligomerization and Friedel‐Crafts alkylation processes (activity up to 3720 kg oligomer ·mol[Ni] −1 ·h −1 ). The use of Et 3 Al 2 Cl 3 results in a higher share of alkylated products (up to 60%). Moreover, catalytic systems activated with Et 3 Al 2 Cl 3 produced small amounts of odd carbon number olefins (up to 0.8%). The Friedel‐Crafts alkylation was used as a trap for previously undetected short‐chain odd carbon number olefins (C 3 and C 5 ). Chemistry ; Alkylation ; Friedel–Crafts reaction ; Ethylene ; Catalysis ; Nickel ; Toluene ; Medicinal chemistry ; Oligomer ; Organic chemistry ; Polymer chemistry Organometallic Complex Synthesis and Catalysis ; Carbon dioxide utilization in catalysis ; Metal-Organic Frameworks: Synthesis and Applications
Authors: Nagham Alnaffakh | Mohamad Reza Talei
Source: Iraqi Journal of Natural Sciences and Nanotechnology (review, 2023-07-21)
Field: Materials Science — Biomaterials

Metal Nanoparticles as Novel Drug Delivery Systems: A Review of Current Challenges and Opportunities Nanotechnology's intriguing characteristics have attracted a lot of study in recent years. Nanomaterials, nanoelectronics, and nanobiotechnology are all subfields of nanotechnology that share a great deal of common ground. The possibility for metal nanoparticles (MNPs) to completely transform treatment is what has made them so remarkable. In addition to avoid antibiotic resistance and improving medication delivery, MNPs have been shown to raise the efficacy index of medicines. Additionally, MNPs have applications in in vitro and in vivo tests, improved biodegradable substance production, and nutraceuticals. Improved targeting at the necessary target location is one major benefit of using metallic nanoparticles for drug delivery systems due to their improved durability and half-life in circulation. Bio-nanotechnology is expanding into the new field of green synthesis of MNPs, which is more environmentally friendly than traditional chemical and physical synthesis techniques. Focusing on environmentally friendly approaches to the preparation, surface modification, and applications of various MNPs like silver, gold, platinum, palladium, copper, zinc oxide, metal sulfide, and nanometal organic frameworks, this review seeks to present current insights into the challenges and perspectives of MNPs in drug delivery systems.&#x0D; Drug delivery ; Nanotechnology ; Nanoparticle ; Current (fluid) ; Materials science ; Engineering Nanoparticle-Based Drug Delivery ; Nanoparticles: synthesis and applications
Authors: Daniel T. W. Toolan | Michael P. Weir | Shuangqing Wang | Simon Dowland | Zhilong Zhang | James Xiao | Jonathan Rawle | Neil C. Greenham | Richard H. Friend | Akshay Rao | Richard A. Jones | Anthony J. Ryan
Source: Nanoscale Horizons (article, 2023-01-01)
Field: Materials Science — Materials Chemistry

Insights into the kinetics and self-assembly order of small-molecule organic semiconductor/quantum dot blends during blade coating Organic-inorganic nanocomposite films formed from blends of small-molecule organic semiconductors and colloidal quantum dots are attractive candidates for high efficiency, low-cost solar energy harvesting devices. Understanding and controlling the self-assembly of the resulting organic-inorganic nanocomposite films is crucial in optimising device performance, not only at a lab-scale but for large-scale, high-throughput printing and coating methods. Here, <i>in situ</i> grazing incidence X-ray scattering (GIXS) gives direct insights into how small-molecule organic semiconductors and colloidal quantum dots self-assemble during blade coating. Results show that for two blends separated only by a small difference in the structure of the small molecule forming the organic phase, crystallisation may proceed down two distinct routes. It either occurs spontaneously or is mediated by the formation of quantum dot aggregates. Irrespective of the initial crystallisation route, the small-molecule crystallisation acts to exclude the quantum dot inclusions from the growing crystalline matrix phase. These results provide important fundamental understanding of structure formation in nanocomposite films of organic small molecules and colloidal quantum dots prepared <i>via</i> solution processing routes. It highlights the fundamental difference to structural evolution which can be made by seemingly small changes in system composition. It provides routes for the structural design and optimisation of solution-processed nanocomposites that are compatible with the large-scale deposition manufacturing techniques that are crucial in driving their wider adoption in energy harvesting applications. Quantum dot ; Semiconductor ; Materials science ; Kinetics ; Molecule ; Self-assembly ; Coating ; Organic semiconductor ; Blade (archaeology) ; Nanotechnology ; Solvent ; Organic molecules ; Scattering ; Chemical engineering ; Chemical physics ; Optoelectronics ; Chemistry ; Optics ; Organic chemistry ; Physics ; Mechanical engineering ; Classical mechanics Quantum Dots Synthesis And Properties ; Organic Electronics and Photovoltaics ; Luminescence and Fluorescent Materials
Authors: Faniry Andriamiseza | Salomé Peters | Clément Roux | Nicolas Dietrich | Christophe Coudret | Juliette Fitremann
Source: Colloids and Surfaces A Physicochemical and Engineering Aspects (article, 2023-06-01)
Field: Materials Science — Biomaterials

Wet spinning and 3D printing of supramolecular hydrogels in acid-base and dynamic conditions Aqueous solution ; Chemistry ; Alkyl ; Solvent ; Self-healing hydrogels ; Base (topology) ; Deprotonation ; Supramolecular chemistry ; Chemical engineering ; Polymer chemistry ; Molecule ; Organic chemistry ; Ion Supramolecular Self-Assembly in Materials ; Polydiacetylene-based materials and applications ; Hydrogels: synthesis, properties, applications
Authors: Bambang Afrinaldi | Frita Yuliati | Hermawan Judawisastra | Lia Amelia Tresna Wulan Asri
Source: Advances in Polymer Technology (article, 2023-12-09)
Field: Materials Science — Polymers and Plastics

Self-Healing Polymers Designed for Underwater Applications Polymeric materials have been employed in a wide range of applications in both dry and wet environments. When these materials suffer damage, it becomes crucial to initiate repairs in order to mitigate further losses. The use of self-healing materials emerges as a promising strategy not only to address this issue but also possess the advantage of prolonging the product’s lifespan. Nevertheless, the development of self-healing materials tailored for wet environments presents a set of obstacles and complexities. The review examines the current state of research in the field and highlights the challenges associated with developing self-healing materials that can effectively repair damage in such environments. We discuss the self-healing mechanisms and various polymers that are extensively employed in the advancement of self-healing materials. We study the progress made in the research and development of self-healing materials specifically designed for wet environments. Furthermore, it provides a summary of various applications of self-healing materials in wet environments. Self-healing ; Self-healing material ; Materials science ; Nanotechnology ; New product development ; Construction engineering ; Biochemical engineering ; Engineering Polymer composites and self-healing ; Surface Modification and Superhydrophobicity ; Antimicrobial agents and applications
Authors: Samantha K. Samaniego Andrade | Lakshmi Shiva Shankar | I. Bakos | Szilvia Klébert | Róbert Kun | M. Mohai | Balázs Nagy | Krisztina László
Source: Preprints.org (preprint, 2023-07-13)
Field: Materials Science — Electronic, Optical and Magnetic Materials

INFLUENCE OF GRAPHENE OXIDE ON THE TEXTURE AND CHEMISTRY OF N, S-DOPED HIGHLY POROUS CARBON AND IMPLICATIONS FOR ELECTROCATALYTIC AND ENERGY STORAGE APPLICATION POTENTIAL High surface area carbon was obtained from -carrageenan – urea cryogels doped with 1.25 – 5 wt% graphene oxide (GO). Incorporation of GO resulted in multifaceted modification in the textural and chemical properties of the carbon cryogel. The thermal decomposition of GO facilitated the formation of micropores resulted in a substantial increase in the apparent surface area (up to 1780 m2/g). The annealing at 1000 °C removed part of the heteroatoms but left behind a high number of defects. While the volatile thermal degradation products of GO affected the porous texture and the surface chemistry in a complex way, its reduced residue resulted in a gradually increasing electrical conductivity. The influence of GO was studied in oxygen reduction reaction (ORR) and in Li-ion storage application. GO affected the electron transfer mechanism in the ORR tests and challenged the stability of the electrodes. Even if the electrode has been stabilized under oxygen-free conditions, later may undergo destabilization processes during the ORR. The 5 wt% GO doped sample was the most sensitive under oxidative conditions, but finally it exhibited the highest capacitance. In the Li-ion battery tests the coulombic efficiency of all the samples was consistently above 98 %, indicating the great potential of such carbons for efficient Li-ion insertion and reinsertion during the charge – discharge process, thereby providing a promising alternative for graphite-based anodes. The cell from the 1.25% sample showed an initial discharge capacity of 313 mAh/g, 95.1 % capacity retention and 99.3 % coulombic efficiency after 50 charge – discharge cycles. Graphene ; Heteroatom ; Oxide ; Faraday efficiency ; Chemical engineering ; Graphite oxide ; Materials science ; Graphite ; Carbon fibers ; Thermal treatment ; Chemistry ; Anode ; Electrode ; Nanotechnology ; Organic chemistry ; Composite material ; Composite number Supercapacitor Materials and Fabrication ; Advancements in Battery Materials ; Graphene research and applications
Authors: Isabel N. Hegarty | Chris S. Hawes | Thorfinnur Gunnlaugsson
Source: Organic Chemistry Frontiers (article, 2023-01-01)
Field: Materials Science — Materials Chemistry

Synthesis of α-amino acid derived (1,2,3-triazol-4-yl)-picolinamide (<b>tzpa</b>) ligands and their corresponding luminescent Tb(<scp>iii</scp>) complexes The synthesis of chiral α-amino acid derived (1,2,3-triazol-4-yl)-picolinamide ( tzpa ) ligands 4–6 designed by combining the coordination properties of two well-known ligand structures within a single unit is described. Chemistry ; Ligand (biochemistry) ; Luminescence ; Stereochemistry ; Amino acid ; Combinatorial chemistry ; Receptor ; Biochemistry Lanthanide and Transition Metal Complexes ; Magnetism in coordination complexes ; Radiopharmaceutical Chemistry and Applications
Authors: Himan Dev Singh | Piyush Singh | Deepak Rase | Ramanathan Vaidhyanathan
Source: Materials Advances (article, 2023-01-01)
Field: Materials Science — Materials Chemistry

Pore volume regulated CO<sub>2</sub> adsorption in C–C bonded porous organic frameworks Three C–C bonded porous organic polymers are assembled by reacting rigid monomers (triformylphenol, triformylphloroglucinol, triformylresorcinol) with pyrrole in a catalyst-free solvothermal reaction. Adsorption ; Porosity ; Volume (thermodynamics) ; Materials science ; Chemical engineering ; Chemistry ; Composite material ; Thermodynamics ; Physical chemistry ; Engineering ; Physics Covalent Organic Framework Applications ; Metal-Organic Frameworks: Synthesis and Applications ; Luminescence and Fluorescent Materials
Authors: Glorija Medak | Andreas Puškarić | Josip Bronić
Source: Crystals (article, 2023-02-16)
Field: Chemistry — Inorganic Chemistry

The Influence of Inserted Metal Ions on Acid Strength of OH Groups in Faujasite The number and the strength of acid sites in catalysts have paramount importance on their efficiency. In zeolites chemistry, increased content of framework Al in zeolites gives a higher number of strong acid sites. Their strength can be a disadvantage in catalytic reactions (e.g., methanol to olefins conversion) due to undesired secondary reactions of coke formation. Here, the Faujasite type of zeolite with higher content of Al has been used for investigating the role of defects in structure and inserted (wet impregnation and thermal treatment) metal cations (Mg, Co, Ni, Zn) on the strength of OH acid sites. Desorption of deuterated acetonitrile, as a probe molecule, was used for OH groups acid strength measurements at different temperatures (150, 200, and 300 °C). Faujasite ; Acid strength ; Chemistry ; Catalysis ; Zeolite ; Inorganic chemistry ; Methanol ; Metal ; Metal ions in aqueous solution ; Desorption ; Coke ; Adsorption ; Organic chemistry Zeolite Catalysis and Synthesis ; Chemical Synthesis and Characterization ; Mesoporous Materials and Catalysis
Authors: Pavel K. Mykhailiuk | Vadym V. Levterov | Yaroslav Panasyuk | Kateryna Sahun | Olexander Stashkevich | Valentyn Badlo | Oleh Shablykin | Iryna V. Sadkova | Lina Bortnichuk | Oleksii Klymenko‐Ulianov | Yuliia Holota | Julia Bas
Source: ChemRxiv (preprint, 2023-01-24)
Field: Chemistry — Organic Chemistry

An “Ideal” Bioisoster of the para-substituted Phenyl Ring The phenyl ring is a basic structural element in chemistry, and we learn about it already in school. We have developed an “ideal” saturated bioisoster of the para-substituted phenyl ring, - 2 oxabicyclo[2.2.2]octane. Its incorporation into Imatinib drug led to dramatic improvement of all physicochemical properties. This study opens new horizons in science, given the commonplace of the phenyl ring everywhere. Ideal (ethics) ; Ring (chemistry) ; Chemistry ; Octane ; Element (criminal law) ; Mathematics ; Medicinal chemistry ; Organic chemistry ; Political science ; Law Click Chemistry and Applications ; Synthesis of β-Lactam Compounds ; Quinazolinone synthesis and applications
Authors: F. Antolini
Source: Nanomaterials (review, 2023-07-05)
Field: Materials Science — Materials Chemistry

Direct Optical Patterning of Quantum Dots: One Strategy, Different Chemical Processes Patterning, stability, and dispersion of the semiconductor quantum dots (scQDs) are three issues strictly interconnected for successful device manufacturing. Recently, several authors adopted direct optical patterning (DOP) as a step forward in photolithography to position the scQDs in a selected area. However, the chemistry behind the stability, dispersion, and patterning has to be carefully integrated to obtain a functional commercial device. This review describes different chemical strategies suitable to stabilize the scQDs both at a single level and as an ensemble. Special attention is paid to those strategies compatible with direct optical patterning (DOP). With the same purpose, the scQDs' dispersion in a matrix was described in terms of the scQD surface ligands' interactions with the matrix itself. The chemical processes behind the DOP are illustrated and discussed for five different approaches, all together considering stability, dispersion, and the patterning itself of the scQDs. Photolithography ; Quantum dot ; Dispersion (optics) ; Quantum chemical ; Nanotechnology ; Materials science ; Stability (learning theory) ; Semiconductor ; Position (finance) ; Optoelectronics ; Computer science ; Optics ; Physics ; Quantum mechanics ; Molecule Quantum Dots Synthesis And Properties ; Molecular Junctions and Nanostructures ; Advanced biosensing and bioanalysis techniques
Authors: Marco Carlotti | Tommaso Losi | Francesco De Boni | Federico Maria Vivaldi | Esteban Araya‐Hermosilla | Mirko Prato | Andrea Pucci | Mario Caironi | Virgilio Mattoli
Source: Polymer Chemistry (article, 2023-01-01)
Field: Materials Science — Polymers and Plastics

Preparation of different conjugated polymers characterized by complementary electronic properties from an identical precursor The possibility of generating regions with different electronic properties within the same organic semiconductor thin film could offer novel opportunities for designing and fabricating organic electronic devices and circuits. This study introduces a new approach based on a novel type of highly processable polymer precursor that can yield two different conjugated polymers characterized by complementary electronic properties, <i>i.e.</i> promoting electron or hole transport, from the same starting material. In particular, these multipotent precursors comprise functionalized dihydroanthracene units that can offer several functionalization opportunities to improve the solubility or insert specific functionalities. This strategy also allows for the preparation of high-molecular-weight conjugated polymers comprising diethynylanthracene and anthraquinone units without the need for solubilizing side chains. Thin films of the polymer precursor can be used, after solid-state transformations, to prepare single organic layers comprising regions characterized by different chemical nature and electronic properties. Here, we present a detailed characterization of the chemical and electronic properties of the precursor and the obtained conjugated polymers, showing how it is possible to harvest their characteristics for potential applications such as electrochromic surfaces and organic field-effect transistors. Conjugated system ; Polymer ; Materials science ; Combinatorial chemistry ; Chemistry ; Polymer chemistry ; Organic chemistry Conducting polymers and applications ; Organic Electronics and Photovoltaics ; Covalent Organic Framework Applications