jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Géraldine Rangel | Céline Moreau | Ana Villares | Christophe Chassenieux | Bernard Cathala
Source: Gels (article, 2024-05-15)
Field: Materials Science — Biomaterials

Xyloglucan–Cellulose Nanocrystals Mixtures: A Case Study of Nanocolloidal Hydrogels and Levers for Tuning Functional Properties The development of fully biobased hydrogels obtained by simple routes and in the absence of toxic or environmentally harmful reagents is a major challenge in meeting new societal demands. In this work, we discuss the development of hydrogels made from cellulose nanocrystals (CNCs) and xyloglucan (XG), two non-toxic, renewable, and biobased components. We present three strategies to fine-tune the functional properties. The first one consists in varying the XG/CNC ratio that leads to the modulation of the mechanical properties of hydrogels as well as a better comprehension of the gel mechanism formation. The second relies on tuning the XG chains' interaction by enzymatic modification to achieve thermoresponsive systems. Finally, the third one is based on the increase in the hydrogel solid content by osmotic concentration. The high-solid-content gels were found to have very high mechanical properties and self-healing properties that can be used for molding materials. Overall, these approaches are a case study of potential modifications and properties offered by biobased nanocolloidal hydrogels. Self-healing hydrogels ; Xyloglucan ; Cellulose ; Materials science ; Chemical engineering ; Nanotechnology ; Polymer chemistry Advanced Cellulose Research Studies ; Polysaccharides and Plant Cell Walls ; Polysaccharides Composition and Applications
Authors: Turdimuhammad Abdullah | Levent BABAYİĞİT | Aleyna Turanlı | Recep Furkan Turan | Cemil Dızman
Source: Journal of Innovative Engineering and Natural Science (article, 2024-12-17)
Field: Materials Science — Polymers and Plastics

Design of flameproof and waterproof natural textile fabrics Natural fabrics, particularly linen and cotton are widely used in the textile industry due to their desirable properties, including breathability, durability, and comfort. However, their hydrophilic nature and inherent flammability pose limitations on their applications in various areas, such as residential settings, automotive vehicles, offices, and protective clothing. In these contexts, flame-retardant and hydrophobic properties are of crucial importance. To address this issue, we have applied UV-curable coatings on the surface of linen and cotton fabrics by employing two distinct acrylic polymer synthesis strategies. In the first approach, a methacrylated phenolic lipid was combined with n-alkyl methacrylate and copolymerized under UV exposure resulting in a hydrophobic and flame-retardant surface. In the second approach, 3-Aminopropyltriethoxysilane is coated on the natural fabric, and then 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) is applied above the 3-Aminopropyltriethoxysilane (APTES) surface prior to UV curing. A comprehensive study was conducted to evaluate the wetting behavior and flame retardancy of the fabric both before and after coating. This was done by employing water contact angle and limiting oxygen index testing. The findings of this study demonstrate that the hydrophobicity and flame retardancy of the fabric can be substantially enhanced through UV coating. Furthermore, the initial ratio between the applied monomers can be adjusted to fine-tune these properties. It is noteworthy that all the chemicals utilized in these investigations are derived from renewable bioresources, thereby ensuring sustainability and biocompatibility. This aspect holds significant importance for the textile industry, aligning with the growing demand for environmentally friendly and socially responsible manufacturing practices. Textile ; Materials science ; Coating ; Limiting oxygen index ; Composite material ; Contact angle ; Methacrylate ; Automotive industry ; Fire retardant ; Wetting ; Polymer ; Durability ; Monomer ; Chemical engineering Flame retardant materials and properties ; Photopolymerization techniques and applications ; Polymer composites and self-healing
Authors: Kanwal Hussain | Rafiq Ahmad | Sohail Hassan | Muhammad Yasir Khan | Akil Ahmad | Mohammed B. Alshammari | Muhammad Saiq Ali | Saeed Ahmed Lakho | Byeong-Il Lee
Source: Analytical Biochemistry (article, 2024-06-21)
Field: Chemistry — Analytical Chemistry

Electrochemical detection of nalbuphine drug using oval-like ZnO nanostructure-based sensor Nanostructure ; Nalbuphine ; Electrochemistry ; Materials science ; Nanotechnology ; Electrochemical gas sensor ; Drug ; Drug detection ; Chemical engineering ; Chemistry ; Chromatography ; Pharmacology ; Medicine ; Electrode ; Biochemistry Analytical Methods in Pharmaceuticals ; Electrochemical sensors and biosensors ; Neuropeptides and Animal Physiology
Authors: Salvatore Macis | Lorenzo Mosesso | Annalisa D’Arco | A. Perucchi | Paola Di Pietro | S. Lupi
Source: Materials (article, 2024-06-25)
Field: Materials Science — Polymers and Plastics

Anisotropic Optical Response of Ti-Doped VO2 Single Crystals This study delves into the effects of titanium (Ti) doping on the optical properties of vanadium dioxide (VO<sub>2</sub>), a material well known for its metal-to-insulator transition (MIT) near room temperature. By incorporating Ti into VO<sub>2</sub>'s crystal lattice, we aim to uncover the resultant changes in its physical properties, crucial for enhancing its application in smart devices. Utilizing polarized infrared micro-spectroscopy, we examined Ti<sub><i>x</i></sub>V<sub>1-<i>x</i></sub>O<sub>2</sub> single crystals with varying Ti concentrations (x = 0.059, x = 0.082, and x = 0.187) across different crystal phases (the conductive rutile phase and insulating monoclinic phases M1 and M2) from the far-infrared to the visible spectral range. Our findings reveal that Ti doping significantly influences the phononic spectra, introducing absorption peaks not attributed to pure VO<sub>2</sub> or TiO<sub>2</sub>. This is especially notable with polarization along the crystal growth axis, mainly in the x = 0.187 sample. Furthermore, we demonstrate that the electronic contribution to optical conductivity in the metallic phase exhibits strong anisotropy, higher along the c axis than the a-b plane. This anisotropy, coupled with the progressive broadening of the zone center infrared active phonon modes with increasing doping, highlights the complex interplay between structural and electronic dynamics in doped VO<sub>2</sub>. Our results underscore the potential of Ti doping in fine-tuning VO<sub>2</sub>'s electronic and thermochromic properties, paving the way for its enhanced application in optoelectronic devices and technologies. Materials science ; Doping ; Anisotropy ; Rutile ; Monoclinic crystal system ; Crystal (programming language) ; Condensed matter physics ; Optoelectronics ; Crystal structure ; Optics ; Crystallography ; Chemistry Transition Metal Oxide Nanomaterials ; Gas Sensing Nanomaterials and Sensors ; Ga2O3 and related materials
Authors: Shu Qian | Fengli Yu | Yexin Luo | Bing Yuan | Congxia Xie | Shitao Yu
Source: Applied Organometallic Chemistry (article, 2024-12-10)
Field: Materials Science — Materials Chemistry

Polyethylene Glycol–Bridged Diimidazolium Polyoxometalates: Thermoregulated Reusable Catalysts for Selective Oxidation of Toluene to Benzaldehyde ABSTRACT The oxidation of toluene to benzaldehyde holds great industrial significance, and it typically involves toxic reagents and/or affords difficult‐to‐separate product mixtures. Herein, polyethylene glycol (PEG)–bridged diimidazolium polyoxometalates (POMs) with a Keggin‐type tungstovanadophosphoric heteropolyacid anion and various PEG‐functionalized diimidazolium cations were prepared and evaluated as catalysts for the eco‐friendly oxidation of toluene using aqueous tert ‐butyl hydroperoxide in acetonitrile. The bridging of diimidazolium cations by PEG enabled the fine‐tuning of heteropolyanion redox properties and increased catalyst reactivity and solubility in the reaction system. The best‐performing POM exhibited thermoregulated phase‐separation behavior, that is, it was fully soluble in the reaction medium at elevated temperatures and hardly soluble at room temperature. Further, it showed almost no performance deterioration after sevenfold reuse and achieved an acceptable toluene conversion (82%) and benzaldehyde selectivity (68%). Thus, our work enables the development of eco‐friendly processes for the catalytic oxidation of industrially relevant hydrocarbon and thus facilitates the establishment of a more sustainable society. Benzaldehyde ; Chemistry ; Toluene ; Catalysis ; Polyethylene glycol ; Selectivity ; Acetonitrile ; Organic chemistry ; Catalytic oxidation ; Redox ; Polymer chemistry ; Inorganic chemistry Polyoxometalates: Synthesis and Applications ; Chemical Synthesis and Reactions ; Oxidative Organic Chemistry Reactions
Authors: Xiaoyue Luo | Yupei Wang | Yuhang Zhang | Chenhao Qian | Yang Cheng | Wu Zhao | Fangyuan Sun | Zhixiang Wei | Jun Wang
Source: Optics Communications (article, 2024-11-09)
Field: Chemistry — Spectroscopy

9.4 μm emitting quantum cascade lasers grown by MOCVD: Performance improvement obtained through AlInAs composition adjustment Metalorganic vapour phase epitaxy ; Cascade ; Materials science ; Laser ; Optics ; Optoelectronics ; Composition (language) ; Quantum cascade laser ; Epitaxy ; Nanotechnology ; Physics ; Chemistry Spectroscopy and Laser Applications ; Semiconductor Lasers and Optical Devices ; Semiconductor Quantum Structures and Devices
Authors: Sohel Reja | S. Vasudevan
Source: ChemRxiv (preprint, 2024-12-03)
Field: Materials Science — Materials Chemistry

A Simple Scalable Production Route for Superparamagnetic Ferrite Nanoparticles with Size and Shape Tuneability Ferrites can be considered as special cases of magnetite where Fe2+ cations are replaced with other divalent metal cations. The synthetic protocols for the production of ferrite nanoparticles also bear striking similarities to the preparation of magnetite. Synthetic methods followed for the preparation of the ferrite nanoparticles are known to alter magnetic, catalytic, and optoelectronic properties drastically. Thus, optimizing the synthetic protocol for the fine-tuning of dimension and morphology-dependent properties is of primary importance. In this work, the use of simple metal nitrate salts as precursor materials for the preparation of ferrite nanoparticles is described. The alcoholic hydrolysis of the metal nitrates in isopropanol produces corresponding hydroxides, which, in addition to oleic acid, result in metal-oleate complexes. Thermal decomposition of the precursor oleate complex produces highly monodispersed ferrite nanoparticles. Ferrite (magnet) ; Superparamagnetism ; Nanoparticle ; Materials science ; Magnetite ; Hydrolysis ; Chemical engineering ; Thermal decomposition ; Metal ; Catalysis ; Nanotechnology ; Chemistry ; Metallurgy ; Organic chemistry ; Magnetization ; Composite material Magnetic Properties and Synthesis of Ferrites
Authors: Milad Karamzadeh-Jahromi | Morteza Izadifard | M. E. Ghazi
Source: Ceramics International (article, 2024-05-29)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Tailoring the functional properties of LSMO-BTO nanocomposites: A sol-gel synthesis approach and comprehensive characterization Materials science ; Nanocomposite ; Dielectric ; Band gap ; Characterization (materials science) ; Perovskite (structure) ; Nanoscopic scale ; Nanotechnology ; Chemical engineering ; Optoelectronics Multiferroics and related materials ; Ferroelectric and Piezoelectric Materials ; Magnetic and transport properties of perovskites and related materials
Authors: Sergei Y. Grishin | Olga M. Mulina | Leiyang Lv | Vera A. Vil’ | Vera A. Vil | Zhiping Li | Alexander O. Terent’ev
Source: Asian Journal of Organic Chemistry (article, 2024-10-15)
Field: Chemistry — Organic Chemistry

Ethers as Building Blocks for the Synthesis and Modification of <i>N</i>‐Heterocycles Abstract The use of C−H compounds as reactive partners in a variety of transformations represents the state of the art in synthetic methodology. In this review, we have summarized the main achievements in using ethers as building blocks for the construction and modification of one of the basic platforms of organic chemistry, nitrogen‐containing heterocycles. Ethers, previously considered mainly as solvents, are excellent CH‐partners, capable of generating radical or cationic reactive species under the action of HAT agents and oxidants. The challenge in this field is the still limited number of heterocyclic systems and other starting reagents, with which the processes can be carried out selectively due to closer bond dissociation energies and oxidation potentials of heterocycles, reactive intermediates and ethers. However, the fine‐tuning of the reaction system using electro‐ and photochemical approaches and a deep understanding of the reaction pathways make the use of ethers as C−H reagents a promising synthetic strategy. Chemistry ; Combinatorial chemistry ; Organic chemistry ; Nanotechnology Multicomponent Synthesis of Heterocycles ; Synthesis and Biological Evaluation ; Chemical Synthesis and Analysis
Authors: Xiejie Chen | Zongyuan Wang | Dingjie Luo | Rui Hu | Yi Cui | Jiaxuan Gao | Bin Dai | Caixia Xu
Source: Surfaces and Interfaces (article, 2024-07-27)
Field: Chemistry — Organic Chemistry

Enhanced catalytic performance in acetylene hydration: A novel Cu-based catalyst anchored via P-O bonds on a CN supporter Catalysis ; Materials science ; Acetylene ; Supporter ; Chemical engineering ; Organic chemistry ; Chemistry Synthesis and Characterization of Pyrroles ; Asymmetric Hydrogenation and Catalysis ; Catalytic C–H Functionalization Methods
Authors: Zhengyu Zhang | Yujie Yang | Hao Li | Zhihao Geng | Hongyu Ding
Source: Journal of Materials Science Materials in Electronics (article, 2024-09-01)
Field: Materials Science — Materials Chemistry

Effect of Gd3+ doping on microstructure and magnetic properties of Ni–Zn–Co ferrite Materials science ; Microstructure ; Ferrite (magnet) ; Doping ; Metallurgy ; Nuclear magnetic resonance ; Composite material ; Optoelectronics Magnetic Properties and Synthesis of Ferrites ; Magnetic properties of thin films ; Magnetic Properties and Applications
Authors: Deying Lin | Junjun Li | Ronghao Wu | Mengqiao Wu | Yongfu Li | Yanjiang Cai | Haifeng Zeng | Hai Xiang | Cheng Fu | Bing Yu
Source: Separation and Purification Technology (article, 2024-11-19)
Field: Chemistry — Electrochemistry

Engineering lattice strain in bimetallic nanostructures to modulate peroxymonosulfate activation pathways Bimetallic strip ; Chemistry ; Nanostructure ; Strain (injury) ; Lattice (music) ; Nanotechnology ; Chemical engineering ; Materials science ; Catalysis ; Physics ; Engineering ; Biochemistry ; Biology Electrochemical Analysis and Applications ; Advanced oxidation water treatment ; Electrocatalysts for Energy Conversion
Authors: Claudia Cardozo | Ana M. Pizarro
Source: Chemistry - A European Journal (article, 2024-08-19)
Field: Chemistry — Organic Chemistry

Facile Method to Obtain Functionalised η<sup>6</sup>‐Bound Arenes in Ru(II) and Os(II) Half‐Sandwich Complexes Half-sandwich Ru(II)- and Os(II)-arene complexes have great potential for catalytic and biological applications. The possibility of fine-tuning their chemical reactivity by including modifications in the ligands around the metal adds to their many advantages. However, structural modifications at the η<sup>6</sup>-bound arene have had significant synthetic limitations, particularly in the design of Os(II)-tethered complexes. For the first time, we have employed a practical C(sp<sup>3</sup>)-C(sp<sup>2</sup>) coupling to obtain 28 new Ru(II) and Os(II) η<sup>6</sup>-arene half-sandwich complexes with a wide variety of arene functionalities, including those that enable the formation of tether rings, such as quinoline, and coumarin. The introduction of novel functional groups at the arene in Ru(II)- and Os(II) half-sandwich complexes can broaden the synthetic scope of this type of organometallic complexes, and help to take full advantage of their structural diversity, for example, in intracellular catalysis. Ruthenium ; Chemistry ; Medicinal chemistry ; Combinatorial chemistry ; Organic chemistry ; Catalysis Organometallic Complex Synthesis and Catalysis ; Asymmetric Hydrogenation and Catalysis ; Supramolecular Chemistry and Complexes
Authors: Xiang Meng | Junjie Xu | Guiping Zhao | L. Zhang | Jiang Cheng | Yong Pu | Wen Li | Lu Li
Source: Journal of Alloys and Compounds (article, 2024-04-22)
Field: Materials Science — Materials Chemistry

Phase control of sulfide nanocrystals from thiourea-mediated solution Sulfide ; Materials science ; Phase (matter) ; Thiourea ; Phase diagram ; Nanomaterials ; Nanoparticle ; Nanotechnology ; Metastability ; Zinc sulfide ; Chemical engineering ; Chemistry ; Zinc ; Metallurgy Quantum Dots Synthesis And Properties ; Chalcogenide Semiconductor Thin Films ; Copper-based nanomaterials and applications
Authors: Minhye Kim | Heekyoung Choi | Minjoo Kim | S.C. Kim | Sang Young Yun | Eunji Lee | Jaeheung Cho | Sung Ho Jung | Jong Hwa Jung
Source: Chemical Science (article, 2024-01-01)
Field: Materials Science — Biomaterials

Pathway control in metallosupramolecular polymerization of a monoalkynylplatinum( <scp>ii</scp> ) terpyridine complex through competitive complex formation Understanding the pathway complexity of supramolecular polymerization in biomimetic systems has been a challenging issue due to its importance in the development of rationally controlled materials and insight into self-assembly in nature. We herein report a kinetic trapping strategy as a new methodology on how to control the pathway of metallosupramolecular polymerization by employing secondary metal ions and/or ligands which form competitive complex species. For this, we proposed monoalkynylplatinum(ii) metalloligand (Pt-L<sup>1</sup>) derived from a bis(amideterpyridine) receptor with one unoccupied terpyridyl terminal as a coordination site for the secondary metal ion (Ag<sup>+</sup> or Fe<sup>2+</sup>). The inherent pathway complexity intrinsic to the Pt-L<sup>1</sup>-anchored supramolecular polymerization has been modulated through the incorporation of Ag<sup>+</sup> or Fe<sup>2+</sup>. During the supramolecular polymerization of Pt-L<sup>1</sup> in the presence of Ag<sup>+</sup> and Fe<sup>2+</sup>, the added secondary ligand bpy (4,4'-dimethyl-2,2'-bipyridine) or DA18C6 (1,14-diaza-18-crown-6) form complexes as kinetic species, thereby inhibiting spontaneous polymerizations. The supramolecular polymer (SP-I), with a spherical structure composed of Pt-L<sup>1</sup> in the absence of metal ions as a kinetic product, did not transform into the thermodynamic product, namely supramolecular polymer (SP-III) with a left-handed fiber structure, due to a high energy barrier. However, the supramolecular polymer (SP-II) with a left-handed fiber structure, which was formed by Pt-L<sup>1</sup> in the presence of AgNO<sub>3</sub>, converted to SP-III upon the addition of NaCl. Additionally, SP-II transformed into supramolecular polymer (SP-IV) upon the addition of Fe(BF<sub>4</sub>)<sub>2</sub>, through an on-pathway process. Both the morphological and emissive characteristics of the resulting supramolecular polymers can be fine-tuned <i>via</i> the Pt⋯Pt or Ag⋯Ag interactions as well as through the changes of the coordination geometry depending on the existing Ag<sup>+</sup> or Fe<sup>2+</sup> ions. The present results have important implications in expanding the scope of pathway complexity to produce a variety of products <i>via</i> kinetically controlled processes involving secondary metal ions and ligands. Terpyridine ; Polymerization ; Chemistry ; Combinatorial chemistry ; Polymer chemistry ; Organic chemistry ; Metal ; Polymer Supramolecular Self-Assembly in Materials ; Supramolecular Chemistry and Complexes ; Porphyrin and Phthalocyanine Chemistry
Authors: Nicolas Fabre | Tuyoshi Fukaminato | Issei Ikariko | Léa Chocron | Arnaud Brosseau | Rémi Métivier
Source: Advanced Optical Materials (article, 2024-06-25)
Field: Materials Science — Materials Chemistry

Unconventional Photoswitching Behavior of a Diarylethene‐Perylenediimide Dyad in Nanoparticles Emerging from Multiple Intermolecular Energy Transfer Processes Abstract Photoswitchable fluorescent systems based on photochromic derivatives have various applications, including high‐resolution imaging and information processing. In this context, a key objective is to control, manipulate, and improve the fluorescence photoswitching of molecular systems. Herein, the intriguing zero‐order photokinetics properties of a photochromic‐fluorescent dyad made of one perylenediimide fluorophore (PDI) and two diarylethene photochromes (DAE) are reported, in the nanoparticles state, resulting from efficient intra‐ and intermolecular energy transfer processes from the PDI to the DAE, well‐rationalized by modified photokinetics equations for photochromism. It allowed the fine‐tuning of the photokinetics, leading to either classical or unconventional behavior, depending on the irradiation wavelength. Fluorescence photoswitching is investigated under a microscope, demonstrating a sigmoidal profile for fluorescence recovery which can be satisfyingly reproduced by a suitable mathematical model that is developed. These findings represent a significant advance in the development of enhanced photoswitchable fluorescent systems, showing high contrast, driven by few photons with tunable switching rates. Diarylethene ; Photochromism ; Fluorophore ; Molecular switch ; Materials science ; Fluorescence ; Intermolecular force ; Context (archaeology) ; Förster resonance energy transfer ; Photochemistry ; Nanoparticle ; Nanotechnology ; Molecule ; Chemistry ; Optics ; Physics ; Organic chemistry Photochromic and Fluorescence Chemistry ; Photoreceptor and optogenetics research ; Porphyrin and Phthalocyanine Chemistry
Authors: Matheus O. Ferreira | Lorena Oliveira Pereira | Stephany Chaiben | Karina Oliveira Lima | Karen J. Edler | Ana Maria Percebom
Source: Colloids and Surfaces A Physicochemical and Engineering Aspects (article, 2024-09-23)
Field: Chemistry — Analytical Chemistry

Oppositely charged polymer-surfactant nanoparticles stabilized by triblock copolymers for enhanced oil loading Copolymer ; Polymer ; Nanoparticle ; Chemical engineering ; Materials science ; Polymer chemistry ; Polymer science ; Nanotechnology ; Composite material Petroleum Processing and Analysis ; Enhanced Oil Recovery Techniques ; Surfactants and Colloidal Systems