jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Radostina Kalinova | Georgy Grancharov | Jordan Doumanov | Kirilka Mladenova | Svetla Petrova | Ivaylo Dimitrov
Source: International Journal of Molecular Sciences (article, 2023-06-24)
Field: Materials Science — Biomaterials

Green Synthesis and the Evaluation of a Functional Amphiphilic Block Copolymer as a Micellar Curcumin Delivery System Polymer micelles represent one of the most attractive drug delivery systems due to their design flexibility based on a variety of macromolecular synthetic methods. The environmentally safe chemistry in which the use or generation of hazardous materials is minimized has an increasing impact on polymer-based drug delivery nanosystems. In this work, a solvent-free green synthetic procedure was applied for the preparation of an amphiphilic diblock copolymer consisting of biodegradable hydrophobic poly(acetylene-functional carbonate) and biocompatible hydrophilic polyethylene glycol (PEG) blocks. The cyclic functional carbonate monomer 5-methyl-5-propargyloxycarbonyl-1,3-dioxane-2-one (MPC) was polymerized in bulk using methoxy PEG-5K as a macroinitiator by applying the metal-free organocatalyzed controlled ring-opening polymerization at a relatively low temperature of 60 °C. The functional amphiphilic block copolymer self-associated in aqueous media into stable micelles with an average diameter of 44 nm. The copolymer micelles were physico-chemically characterized and loaded with the plant-derived anticancer drug curcumin. Preliminary in vitro evaluations indicate that the functional copolymer micelles are non-toxic and promising candidates for further investigation as nanocarriers for biomedical applications. Micelle ; Amphiphile ; Copolymer ; Nanocarriers ; Drug delivery ; Polyethylene glycol ; Polymersome ; Polymerization ; Materials science ; Polymer ; Chemistry ; Polymer chemistry ; Organic chemistry ; Aqueous solution biodegradable polymer synthesis and properties ; Advanced Polymer Synthesis and Characterization ; Carbon dioxide utilization in catalysis
Authors: Svetlana Lukáš Petrova | Martina Vragović | Ewa Pavlová | Zulfiya Černochová | Alessandro Jäger | Eliézer Jäger | Rafał Konefał
Source: Pharmaceutics (article, 2023-04-08)
Field: Materials Science — Biomaterials

Smart Poly(lactide)-b-poly(triethylene glycol methyl ether methacrylate) (PLA-b-PTEGMA) Block Copolymers: One-Pot Synthesis, Temperature Behavior, and Controlled Release of Paclitaxel This paper introduces a new class of amphiphilic block copolymers created by combining two polymers: polylactic acid (PLA), a biocompatible and biodegradable hydrophobic polyester used for cargo encapsulation, and a hydrophilic polymer composed of oligo ethylene glycol chains (triethylene glycol methyl ether methacrylate, TEGMA), which provides stability and repellent properties with added thermo-responsiveness. The PLA-<i>b</i>-PTEGMA block copolymers were synthesized using ring-opening polymerization (ROP) and reversible addition-fragmentation chain transfer (RAFT) polymerization (ROP-RAFT), resulting in varying ratios between the hydrophobic and hydrophilic blocks. Standard techniques, such as size exclusion chromatography (SEC) and <sup>1</sup>H NMR spectroscopy, were used to characterize the block copolymers, while <sup>1</sup>H NMR spectroscopy, 2D nuclear Overhauser effect spectroscopy (NOESY), and dynamic light scattering (DLS) were used to analyze the effect of the hydrophobic PLA block on the LCST of the PTEGMA block in aqueous solutions. The results show that the LCST values for the block copolymers decreased with increasing PLA content in the copolymer. The selected block copolymer presented LCST transitions at physiologically relevant temperatures, making it suitable for manufacturing nanoparticles (NPs) and drug encapsulation-release of the chemotherapeutic paclitaxel (PTX) via temperature-triggered drug release mechanism. The drug release profile was found to be temperature-dependent, with PTX release being sustained at all tested conditions, but substantially accelerated at 37 and 40 °C compared to 25 °C. The NPs were stable under simulated physiological conditions. These findings demonstrate that the addition of hydrophobic monomers, such as PLA, can tune the LCST temperatures of thermo-responsive polymers, and that PLA-<i>b</i>-PTEGMA copolymers have great potential for use in drug and gene delivery systems via temperature-triggered drug release mechanisms in biomedicine applications. Lower critical solution temperature ; Copolymer ; Polymer chemistry ; Materials science ; Ethylene glycol ; Chain transfer ; Methacrylate ; Dynamic light scattering ; Polymer ; Polymerization ; Reversible addition−fragmentation chain-transfer polymerization ; Micelle ; Chemical engineering ; Chemistry ; Aqueous solution ; Radical polymerization ; Organic chemistry ; Nanoparticle ; Nanotechnology biodegradable polymer synthesis and properties ; Advanced Polymer Synthesis and Characterization ; Nanoparticle-Based Drug Delivery
Authors: Maojun Deng | Jiamin Sun | Jeet Chakraborty | Maofan Zhou | Pascal Van Der Voort
Source: ChemCatChem (review, 2023-12-22)
Field: Materials Science — Materials Chemistry

From Design to Applications: A Comprehensive Review on Porous Frameworks for Photocatalytic Volatile Organic Compounds (VOCs) Removal Abstract Volatile organic compounds (VOCs) present significant and irreversible risks to both human health and the environment. Therefore, there is an urgent and important need for extensive research aimed at identifying suitable materials and effective technical approaches for VOC removal. Metal‐ and covalent organic frameworks (MOFs, COFs), along with covalent triazine frameworks (CTFs), represent an attractive class of porous materials characterized by adjustable structures, high porosity, and high specific surface areas. In recent years, these materials have rapidly advanced across various fields, including gas adsorption and separation, drug delivery, sensing, and heterogeneous catalysis. Notably, MOFs, COFs, and CTFs exhibit immense potential for the photocatalytic elimination of VOCs, since they behave as semiconductors with adjustable properties. This review offers an overview of the synthesis and structural relationships of MOFs, COFs, and CTFs while discussing the recent progress in photocatalytic VOC removal. Additionally, a comprehensive overview of the photocatalytic mechanism is presented. Finally, the current limitations and prospective future developments are discussed. Photocatalysis ; Porosity ; Porous medium ; Environmental science ; Environmental chemistry ; Chemical engineering ; Materials science ; Chemistry ; Nanotechnology ; Organic chemistry ; Catalysis ; Engineering Covalent Organic Framework Applications ; Metal-Organic Frameworks: Synthesis and Applications ; Advanced Photocatalysis Techniques
Authors: Mario Kurniawan | Svetlozar Ivanov
Source: Energies (review, 2023-06-25)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Electrochemically Structured Copper Current Collectors for Application in Energy Conversion and Storage: A Review Copper current collectors (Cu CCs) impact the production technology and performance of many electrochemical devices by their unique properties and reliable operation. The efficiency of the related processes and the operation of the electrochemical devices could be significantly improved by optimization of the Cu CCs. Metallic Cu plays an important role in electrochemical energy storage and electrocatalysis, primarily as a conducting substrate on which the chemical processes take place. Li nucleation and growth can be influenced by the current collector by modulating the local current density and Li ion transport. For example, the commonly used planar Cu CC does not perform satisfactorily; therefore, a high number of different modifications of Cu CCs have been proposed and reported in the literature for minimizing the local current density, hindering Li dendrite formation, and improving the Coulombic efficiency. Here, we provide an updated critical overview of the basic strategies of 3D Cu CC structuring, methodologies for analyzing these structures, and approaches for effective control over their most relevant properties. These methods are described in the context of their practical usefulness and applicability in an effort to aid in their easy implementation by research groups and private companies with established traditions in electrochemistry and plating technology. Furthermore, the current overview could be helpful for specialists with experience in associated fields of knowledge such as materials engineering and surface finishing, where electrochemical methods are frequently applied. Motivated by the importance of the final application of Cu CCs in energy storage devices, this review additionally discusses the relationship between CC properties and the functional parameters of the already-implemented electrodes. Faraday efficiency ; Context (archaeology) ; Structuring ; Energy storage ; Current (fluid) ; Electrochemistry ; Process engineering ; Current collector ; Electrochemical energy conversion ; Nanotechnology ; Materials science ; Nucleation ; Electrochemical energy storage ; Current density ; Electrocatalyst ; Computer science ; Electrode ; Electrical engineering ; Engineering ; Electrolyte ; Chemistry ; Supercapacitor Supercapacitor Materials and Fabrication ; Advancements in Battery Materials ; Anodic Oxide Films and Nanostructures
Authors: Raul Fontelo | Rui L. Reis | Ramón Novoa-Carballal | Iva Pashkuleva
Source: Advanced Healthcare Materials (review, 2023-09-22)
Field: Materials Science — Materials Chemistry

Preparation, Properties, and Bioapplications of Block Copolymer Nanopatterns Block copolymer (BCP) self-assembly has emerged as a feasible method for large-scale fabrication with remarkable precision - features that are not common for most of the nanofabrication techniques. In this review, recent advancements in the molecular design of BCP along with state-of-the-art processing methodologies based on microphase separation alone or its combination with different lithography methods are presented. Furthermore, the bioapplications of the generated nanopatterns in the development of protein arrays, cell-selective surfaces, and antibacterial coatings are explored. Finally, the current challenges in the field are outlined and the potential breakthroughs that can be achieved by adopting BCP approaches already applied in the fabrication of electronic devices are discussed. Nanotechnology ; Materials science ; Fabrication ; Nanolithography ; Copolymer ; Lithography ; Nanostructure ; Polymer ; Optoelectronics Block Copolymer Self-Assembly ; Advanced Polymer Synthesis and Characterization ; RNA Interference and Gene Delivery
Authors: Clément Nicollet | Alfonso J. Carrillo
Source: Journal of Electroceramics (article, 2023-11-18)
Field: Materials Science — Materials Chemistry

Back to basics: synthesis of metal oxides Oxide ; Nanotechnology ; Computer science ; Protocol (science) ; Field (mathematics) ; Materials science ; Mathematics Electronic and Structural Properties of Oxides ; Catalytic Processes in Materials Science ; Catalysis and Oxidation Reactions
Authors: Igor Shiabiev | Dmitry Pysin | Alan Akhmedov | Olga B. Babaeva | Vasily M. Babaev | Anna P. Lyubina | Alexandra D. Voloshina | K. A. PETROV | Pavel Padnya | Ivan I. Stoikov
Source: Pharmaceutics (article, 2023-12-05)
Field: Chemistry — Organic Chemistry

Towards Antibacterial Agents: Synthesis and Biological Activity of Multivalent Amide Derivatives of Thiacalix[4]arene with Hydroxyl and Amine Groups Antimicrobial resistance to modern antibiotics stimulates the search for new ways to synthesize and modify antimicrobial drugs. The development of synthetic approaches that can easily change different fragments of the molecule is a promising solution to this problem. In this work, a synthetic approach was developed to obtain multivalent thiacalix[4]arene derivatives containing different number of amine and hydroxyl groups. A series of macrocyclic compounds in <i>cone</i>, <i>partial cone</i>, and <i>1</i>,<i>3-alternate</i> stereoisomeric forms containing -NHCH<sub>2</sub>CH<sub>2</sub>R (R = NH<sub>2</sub>, N(CH<sub>3</sub>)<sub>2</sub>, and OH) and -N(CH<sub>2</sub>CH<sub>2</sub>OH)<sub>2</sub> terminal fragments, and their model non-macrocyclic analogues were obtained. The antibacterial activity against Gram-positive (<i>Staphylococcus aureus</i>, <i>Bacillus cereus</i>, and <i>Enterococcus faecalis</i>) and Gram-negative (<i>Escherichia coli</i> and <i>Pseudomonas aeruginosa</i>) bacterial strains and cytotoxicity of the obtained compounds were studied. Structure-activity relationships were established: (1) the macrocyclic compounds had high antibacterial activity, while the monomeric compounds had low activity; (2) the compounds in <i>cone</i> and <i>partial cone</i> conformations had better antibacterial activity compared to the compounds in <i>1</i>,<i>3-alternate</i> stereoisomeric form; (3) the macrocyclic compounds containing -NHCH<sub>2</sub>CH<sub>2</sub>N(CH<sub>3</sub>)<sub>2</sub> terminal fragments had the highest antibacterial activity; (4) introduction of additional terminal hydroxyl groups led to a significant decrease in antibacterial activity; (5) the compounds in <i>partial cone</i> conformation had significant bactericidal activity against all studied cell strains; the best selectivity was observed for the compounds in <i>cone</i> conformation. The mechanism of antibacterial activity of lead compounds with terminal fragments -NHCH<sub>2</sub>CH<sub>2</sub>N(CH<sub>3</sub>)<sub>2</sub> was proved using model negatively charged POPG vesicles, i.e., the addition of these compounds led to an increase in the size and zeta potential of the vesicles. The obtained results open up the possibility of using the synthesized macrocyclic compounds as promising antibacterial agents. Antibacterial activity ; Chemistry ; Amide ; Amine gas treating ; Antimicrobial ; Bacillus cereus ; Escherichia coli ; Stereochemistry ; Combinatorial chemistry ; Organic chemistry ; Bacteria ; Biochemistry ; Biology Antimicrobial agents and applications ; Chemical Synthesis and Analysis ; Click Chemistry and Applications
Authors: L. N. Lisetski | Л. А. Булавін | Nikolaï Lebovka
Source: Liquids (article, 2023-05-29)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Effects of Dispersed Carbon Nanotubes and Emerging Supramolecular Structures on Phase Transitions in Liquid Crystals: Physico-Chemical Aspects The current state of the study of different liquid crystalline (LC) systems doped with carbon nanotubes (CNTs) is discussed. An attempt is endeavored to outline the state-of-the-art technology that has emerged after two past decades. Systematization and analysis are presented for the integration of single- and multi-walled carbon nanotubes in thermotropic (nematic, smectic, cholesteric, ferroelectric, etc.) and lyotropic LCs. Special attention is paid to the effects of alignment and supramolecular organization resulting from orientational coupling between CNTs and the LC matrix. The effects of the specific inter-molecular and inter-particle interactions and intriguing microstructural, electromagnetic, percolation, optical, and electro-optical properties are also discussed. Liquid crystal ; Thermotropic crystal ; Carbon nanotube ; Materials science ; Supramolecular chemistry ; Lyotropic ; Nanotechnology ; Phase transition ; Ferroelectricity ; Phase (matter) ; Lyotropic liquid crystal ; Chemical physics ; Liquid crystalline ; Condensed matter physics ; Organic chemistry ; Molecule ; Chemistry ; Optoelectronics Liquid Crystal Research Advancements ; Advanced Materials and Mechanics ; Plant Reproductive Biology
Authors: Ze‐Fan Yao | Emil Lundqvist | Yuyao Kuang | Herdeline Ann M. Ardoña
Source: Advanced Science (review, 2023-01-20)
Field: Materials Science — Polymers and Plastics

Engineering Multi‐Scale Organization for Biotic and Organic Abiotic Electroactive Systems Multi-scale organization of molecular and living components is one of the most critical parameters that regulate charge transport in electroactive systems-whether abiotic, biotic, or hybrid interfaces. In this article, an overview of the current state-of-the-art for controlling molecular order, nanoscale assembly, microstructure domains, and macroscale architectures of electroactive organic interfaces used for biomedical applications is provided. Discussed herein are the leading strategies and challenges to date for engineering the multi-scale organization of electroactive organic materials, including biomolecule-based materials, synthetic conjugated molecules, polymers, and their biohybrid analogs. Importantly, this review provides a unique discussion on how the dependence of conduction phenomena on structural organization is observed for electroactive organic materials, as well as for their living counterparts in electrogenic tissues and biotic-abiotic interfaces. Expansion of fabrication capabilities that enable higher resolution and throughput for the engineering of ordered, patterned, and architecture electroactive systems will significantly impact the future of bioelectronic technologies for medical devices, bioinspired harvesting platforms, and in vitro models of electroactive tissues. In summary, this article presents how ordering at multiple scales is important for modulating transport in both the electroactive organic, abiotic, and living components of bioelectronic systems. Nanotechnology ; Biomolecule ; Abiotic component ; Materials science ; Living systems ; Nanoscopic scale ; Computer science ; Ecology ; Biology Conducting polymers and applications ; Advanced Sensor and Energy Harvesting Materials ; Supramolecular Self-Assembly in Materials
Authors: Fabien Ceugniet | Amina Labiod | Denis Jacquemin | Benoı̂t Heinrich | Fanny Richard | Patrick Lévêque | Gilles Ulrich | Nicolas Leclerc
Source: Journal of Materials Chemistry C (article, 2023-01-01)
Field: Materials Science — Materials Chemistry

Non-fused BODIPY-based acceptor molecules for organic photovoltaics A new NFA design based on the unusual BODIPY unit as the central electron accepting component is described. All derivatives exhibit low optical bandgaps, high extinction coefficients and LUMO levels deep enough to be used as NFAs. BODIPY ; Materials science ; Organic solar cell ; HOMO/LUMO ; Acceptor ; Molecule ; Photovoltaic system ; Photovoltaics ; Photochemistry ; Component (thermodynamics) ; Electron acceptor ; Extinction (optical mineralogy) ; Fluorescence ; Organic chemistry ; Optics ; Chemistry ; Physics ; Polymer Luminescence and Fluorescent Materials ; Organic Electronics and Photovoltaics ; Organic Light-Emitting Diodes Research
Authors: Ujala Anwar | Numrah Sultan | Ghazala Yasmeen | Khaqan Shati | M. Nadeem
Source: Heliyon (article, 2023-12-01)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Temperature-dependent conduction mechanism of NiO@Carbon@Polypyrrole nanomaterial with EMI shielding characteristics A simple hydrothermal technique and in-situ chemical oxidative polymerization of pyrrole monomer yield the functionalized NiO@C@PPy nanomaterial for electromagnetic shielding applications. The crystal structure, morphology, dielectric and electromagnetic shielding (EMI) performance in the X-band (8.2-12.4 GHz) is thoroughly studied. Impedance spectroscopy is utilized to study the electrical response of a NiO@C@PPy pellet. This study focuses on the modulations of relaxation time with frequency at different temperatures. In the NiO@C@PPy composite, a semiconductor-to-metal transition (SMT) is observed, at 328 K. The conduction mechanism of NiO@C@PPy is explained based on the carrier hopping transport model in Ni<sup>2+</sup> and Ni<sup>3+</sup> ions. It is evident from the activation energy value (Ea ≈ 0.32 eV) determined from impedance, conductivity, and dielectric data that the relaxation and conduction processes correspond to the same electro-active region. Using the variable range hopping (VRH) model localization length of the carrier is calculated to be 1.56 Å. The NiO@C@PPy sample demonstrated enhanced conductivity and low dielectric values which are vital in EMI shielding applications. Consequently, the electromagnetic interference shielding effectiveness is found to be 21.9 dB of NiO@C@PPy in the X-band frequency range. This composite material is a good candidate for high frequency shielding applications. Materials science ; Polypyrrole ; Electromagnetic shielding ; Dielectric ; Dielectric spectroscopy ; Non-blocking I/O ; Variable-range hopping ; Conductivity ; Thermal conduction ; Composite material ; Optoelectronics ; Electrochemistry ; Polymerization ; Polymer ; Chemistry ; Electrode Electromagnetic wave absorption materials ; Advanced Antenna and Metasurface Technologies ; Advanced Energy Technologies and Civil Engineering Innovations
Authors: Ming Lu | Björn Lindman | Krister Holmberg
Source: Physical Chemistry Chemical Physics (review, 2023-10-31)
Field: Chemistry — Organic Chemistry

Effect of polymer addition on the phase behavior of oil–water–surfactant systems of Winsor III type Ternary oil-water-surfactant systems can give rise to an O/W microemulsion in equilibrium with excess oil, a W/O microemulsion in equilibrium with excess water, or a bicontinuous microemulsion in equilibrium with excess oil and water. This type of phase behavior has been known for a long time and the three systems are often referred to as Winsor I, Winsor II and Winsor III, respectively after the British scientist P. A. Winsor who pioneered the area. The Winsor systems are technically important and well understood today. It was later found that addition of a polymer to the oil-water-surfactant system can influence the phase behavior considerably. While a hydrophilic polymer will be incorporated in the water phase and a hydrophobic polymer in the oil phase, an amphiphilic polymer with the right hydrophilic-lipophilic balance may expand the middle phase microemulsion in a Winsor III system. Expansion of the middle phase of such a system will lead to a reduction of the oil/microemulsion and the microemulsion/water interfacial tensions. This can be practically important, and the effect is currently of considerable interest for so-called surfactant flooding for enhanced oil recovery (EOR). Boosting the middle phase of the Winsor III system by addition of a polymer to the surfactant system is still not an established procedure and not so well understood from a scientific point of view. In this review we summarize the work done in the field and we demonstrate that the role of the polymer is intimately linked to its interactions with the three other components in the system: the oil, the water, and the surfactant(s). Microemulsion ; Pulmonary surfactant ; Ternary operation ; Ternary numeral system ; Phase (matter) ; Chemical engineering ; Water in oil ; Chemistry ; Phase equilibrium ; Thermodynamics ; Materials science ; Organic chemistry ; Emulsion ; Physics Surfactants and Colloidal Systems ; Enhanced Oil Recovery Techniques ; Petroleum Processing and Analysis