jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Nada Elgiddawy | Noha Elnagar | Hafsa Korri‐Youssoufi | Abderrahim Yassar
Source: Microorganisms (review, 2023-08-03)
Field: Materials Science — Materials Chemistry

π-Conjugated Polymer Nanoparticles from Design, Synthesis to Biomedical Applications: Sensing, Imaging, and Therapy In the past decade, π-conjugated polymer nanoparticles (CPNs) have been considered as promising nanomaterials for biomedical applications, and are widely used as probe materials for bioimaging and drug delivery. Due to their distinctive photophysical and physicochemical characteristics, good compatibility, and ease of functionalization, CPNs are gaining popularity and being used in more and more cutting-edge biomedical sectors. Common synthetic techniques can be used to synthesize CPNs with adjustable particle size and dispersion. More importantly, the recent development of CPNs for sensing and imaging applications has rendered them as a promising device for use in healthcare. This review provides a synopsis of the preparation and functionalization of CPNs and summarizes the recent advancements of CPNs for biomedical applications. In particular, we discuss their major role in bioimaging, therapeutics, fluorescence, and electrochemical sensing. As a conclusion, we highlight the challenges and future perspectives of biomedical applications of CPNs. Nanotechnology ; Surface modification ; Materials science ; Drug delivery ; Computer science ; Chemistry Covalent Organic Framework Applications ; Conducting polymers and applications ; Luminescence and Fluorescent Materials
Authors: Shanshan Shang | Yuanmeng Tian | Chao Yang | Chenguang Wang | Xinyu Chen | Daiqi Ye | Jin Shang
Source: Chemical Engineering Journal (article, 2023-11-10)
Field: Chemistry — Inorganic Chemistry

Ambient temperature NO2 removal by adsorption on robust DMOFs: Regulating water stability, acid stability, and NO2 capacity by methyl functionalization Adsorption ; Surface modification ; Fourier transform infrared spectroscopy ; Chemical engineering ; Water vapor ; Chemistry ; Porosity ; Nitrogen dioxide ; Metal-organic framework ; Chemical stability ; Inorganic chemistry ; Organic chemistry ; Physical chemistry Metal-Organic Frameworks: Synthesis and Applications ; Covalent Organic Framework Applications ; Catalytic Processes in Materials Science
Authors: Lu Dai | Anwang Dong | Xiangjian Meng | Huanyu Liu | Yueting Li | Pengfei Li | Bo Wang
Source: Angewandte Chemie (article, 2023-02-09)
Field: Materials Science — Materials Chemistry

Enhancement of Visible‐Light‐Driven Hydrogen Evolution Activity of 2D π‐Conjugated Bipyridine‐Based Covalent Organic Frameworks via Post‐Protonation Abstract Photocatalytic hydrogen (H 2 ) evolution represents a promising and sustainable technology. Covalent organic frameworks (COFs)‐based photocatalysts have received growing attention. A 2D fully conjugated ethylene‐linked COF (BTT‐BPy‐COF) was fabricated with a dedicated designed active site. The introduced bipyridine sites enable a facile post‐protonation strategy to fine‐tune the actives sites, which results in a largely improved charge‐separation efficiency and increased hydrophilicity in the pore channels synergically. After modulating the degree of protonation, the optimal BTT‐BPy‐PCOF exhibits a remarkable H 2 evolution rate of 15.8 mmol g −1 h −1 under visible light, which surpasses the biphenyl‐based COF 6 times. By using different types of acids, the post‐protonation is proved to be a potential universal strategy for promoting photocatalytic H 2 evolution. This strategy would provide important guidance for the design of highly efficient organic semiconductor photocatalysts. Protonation ; Covalent organic framework ; Conjugated system ; Photocatalysis ; Chemistry ; Covalent bond ; Biphenyl ; Photochemistry ; Bipyridine ; Combinatorial chemistry ; Organic chemistry ; Catalysis ; Polymer Covalent Organic Framework Applications ; Advanced Photocatalysis Techniques ; Metal-Organic Frameworks: Synthesis and Applications
Authors: Viraj P. Nirwan | Magdalena Lasak | Karol Ciepluch | Amir Fahmi
Source: Nanomaterials (article, 2023-02-05)
Field: Materials Science — Materials Chemistry

Hybrid Nanomat: Copolymer Template CdSe Quantum Dots In Situ Stabilized and Immobilized within Nanofiber Matrix Fabrication and characterization of hybrid nanomats containing quantum dots can play a prominent role in the development of advanced biosensors and bio-based semiconductors. Owing to their size-dependent properties and controlled nanostructures, quantum dots (QDs) exhibit distinct optical and electronic characteristics. However, QDs include heavy metals and often require stabilizing agents which are toxic for biological applications. Here, to mitigate the use of toxic ligands, cadmium selenide quantum dots (CdSe QDs) were synthesized in situ with polyvinylpyrrolidone (PVP) at room temperature. The addition of PVP polymer provided size regulation, stability, and control over size distribution of CdSe QDs. The characterization of the optical properties of the CdSe QDs was performed using fluorescence and ultraviolet-visible (UV-Vis) spectroscopy. CdSe QDs exhibited a typical absorbance peak at 280 nm and a photoluminescence emission peak at 580 nm. Transmission electron microscopy (TEM) micrographs demonstrated that CdSe QDs having an average size of 6 ± 4 nm were obtained via wet chemistry method. CdSe QDs were immobilized in a blend of PVP and poly(L-lactide-co-ε-caprolactone) (PL-b-CL) copolymer that was electrospun to produce nanofibers. Scanning electron microscopy (SEM), thermal analyses and attenuated total reflectance Fourier-transform infrared spectroscopy (ATR-FTIR) were used to characterize properties of fabricated nanofibers. Both pristine and hybrid nanofibers possessed cylindrical geometry and rough surface features, facilitating increased surface area. Infrared absorption spectra showed a slight shift in absorbance peaks due to interaction of PVP-coated CdSe QDs and nanofiber matrix. The presence of CdSe QDs influenced the fiber diameter and their thermal stability. Further, in vitro biological analyses of hybrid nanofibers showed promising antibacterial effect and decline in cancer cell viability. This study offers a simple approach to obtain hybrid nanomats immobilized with size-controlled PVP-coated CdSe QDs, which have potential applications as biosensors and antibacterial and anticancer cell agents. Quantum dot ; Materials science ; Nanofiber ; Fourier transform infrared spectroscopy ; Photoluminescence ; Cadmium selenide ; Absorbance ; Chemical engineering ; Nanotechnology ; Polyvinylpyrrolidone ; Electrospinning ; Scanning electron microscope ; Transmission electron microscopy ; Absorption spectroscopy ; Polymer ; Optoelectronics ; Polymer chemistry ; Composite material ; Chemistry ; Optics ; Chromatography Quantum Dots Synthesis And Properties ; Advanced Photocatalysis Techniques ; Chalcogenide Semiconductor Thin Films
Authors: Cai‐Ming Liu | Shui‐Dong Zhu | Ying‐Bing Lu | Xiang Hao | He‐Rui Wen
Source: Inorganic Chemistry Frontiers (article, 2023-01-01)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Homochiral Cu<sub>6</sub>Dy<sub>3</sub> single-molecule magnets displaying proton conduction and a strong magneto-optical Faraday effect Zero-field single-molecule magnetic behavior and proton conductivity are integrated into homochiral 3d–4f nanoscale molecules, and strong magneto-optical coupling can be realized in the meantime, resulting in strong magneto-optical Faraday effects. Faraday cage ; Magnet ; Molecule ; Proton ; Magnetic field ; Coupling (piping) ; Condensed matter physics ; Magneto optical ; Thermal conduction ; Materials science ; Faraday effect ; Conductivity ; Optical conductivity ; Magneto ; Inductive coupling ; Physics ; Chemistry ; Physical chemistry Magnetism in coordination complexes ; Porphyrin and Phthalocyanine Chemistry ; Metal-Organic Frameworks: Synthesis and Applications
Authors: Lu Wang | Yi‐Ting Shen | Yuxin Wang | Haiying Wang | Wen‐Juan Hao | Bo Jiang
Source: Advanced Synthesis & Catalysis (article, 2023-05-05)
Field: Chemistry — Organic Chemistry

Multicomponent Annulative SO<sub>2</sub> Insertion of Heteroatom‐Linked 1,7‐Diynes for Accessing Tricyclic Sulfones Abstract A metal‐free radical multicomponent bicyclization of heteroatom‐linked 1,7‐diynes with aryl diazonium tetrafluoroborates and DABCO‐bis(sulfurdioxide) (DABSO) is reported, enabling annulative SO 2 insertion access to produce two types of skeletally diverse tricyclic sulfones, namely, thieno[3,4‐ c ]quinoline 2,2‐dioxides and thieno[3,4‐ c ]chromene 2,2‐dioxides, with moderate to good yields by simply tuning the linkers of the 1,7‐diynes. This protocol demonstrates remarkable compatibility regarding N ‐ and O ‐linked 1,7‐diynes with different substitution patterns and aryl diazonium tetrafluoroborates. magnified image Chemistry ; Heteroatom ; Tricyclic ; DABCO ; Quinoline ; Aryl ; Combinatorial chemistry ; Octane ; Medicinal chemistry ; Stereochemistry ; Organic chemistry ; Ring (chemistry) Sulfur-Based Synthesis Techniques ; Radical Photochemical Reactions ; Synthesis of Indole Derivatives
Authors: Ranjana Choudhary Ahirwar | Swati Mehra | Sanjeev Machindra Reddy | Hassan Abbas Alshamsi | Aseel A. Kadhem | Smita Badur Karmankar | Alka Sharma | Poushali
Source: Polymers (review, 2023-01-12)
Field: Materials Science — Materials Chemistry

Progression of Quantum Dots Confined Polymeric Systems for Sensorics The substantial fluorescence (FL) capabilities, exceptional photophysical qualities, and long-term colloidal stability of quantum dots (QDs) have aroused a lot of interest in recent years. QDs have strong and wide optical absorption, good chemical stability, quick transfer characteristics, and facile customization. Adding polymeric materials to QDs improves their effectiveness. QDs/polymer hybrids have implications in sensors, photonics, transistors, pharmaceutical transport, and other domains. There are a great number of review articles available online discussing the creation of CDs and their many uses. There are certain review papers that can be found online that describe the creation of composites as well as their many different uses. For QDs/polymer hybrids, the emission spectra were nearly equal to those of QDs, indicating that the optical characteristics of QDs were substantially preserved. They performed well as biochemical and biophysical detectors/sensors for a variety of targets because of their FL quenching efficacy. This article concludes by discussing the difficulties that still need to be overcome as well as the outlook for the future of QDs/polymer hybrids. Quantum dot ; Nanotechnology ; Materials science ; Photonics ; Polymer ; Quenching (fluorescence) ; Fluorescence ; Optoelectronics ; Physics Carbon and Quantum Dots Applications ; Quantum Dots Synthesis And Properties ; Advanced biosensing and bioanalysis techniques
Authors: Lucija Mandić | Marija Matković | Goran Baranović | Suzana Šegota
Source: Antioxidants (article, 2023-03-16)
Field: Materials Science — Biomaterials

The Increased Release Kinetics of Quercetin from Superparamagnetic Nanocarriers in Dialysis The actual cumulative mass of released quercetin from nanoparticles within the dialysis membrane was determined under the influence of external stationary and alternating magnetic fields. We have shown that the control of the release kinetics of quercetin from MNPs, i.e., the distribution of quercetin between the nanoparticles and the suspension within the membrane, can be tuned by the simple combination of stationary and alternating magnetic fields. Under non-sink conditions, the proportion of quercetin in the suspension inside the membrane is increased toward the nanoparticles, resulting in the increased release of quercetin. The results obtained could be applied to the release of insoluble flavonoids in aqueous suspensions in general. Quercetin ; Nanocarriers ; Dialysis tubing ; Chemistry ; Membrane ; Superparamagnetism ; Kinetics ; Nanoparticle ; Magnetic nanoparticles ; Suspension (topology) ; Aqueous solution ; Chromatography ; Chemical engineering ; Materials science ; Nanotechnology ; Biochemistry ; Organic chemistry ; Magnetic field Nanoparticle-Based Drug Delivery ; Protein Interaction Studies and Fluorescence Analysis ; Gold and Silver Nanoparticles Synthesis and Applications
Authors: Niranjana Jaya Prakash | Supriya Sanatkumar Sarkar | Balasubramanian Kandasubramanian
Source: Macromolecular Bioscience (review, 2023-03-12)
Field: Materials Science — Biomaterials

Emerging Strategies in Stimuli‐Responsive Silk Architectures The utilization of implantable devices beseeches highly invasive surgeries considering the adversaries in the insertion of large, impliable devices through the body channels, which necessitate the development of implantable devices using biocompatible shape memory polymers. Silk displays prodigious heterogeneity in its genetic structure and physical properties in accordance with the spinning and storage process, where proteins undergo folding and unfolding. The stimuli-responsive nature of silk can be explained with the help of the structural morphology and composition of the material, where the hydrogen bonds in β-sheet domains and amorphous region act as switch points and net points, respectively. This review provides a primary attempt to enswathe all the literature available to date on the stimuli-responsive nature of silk and silk-based materials as a natural and biodegradable alternative for commercially used synthetic shape memory materials taking their elastomeric nature and reduction in glass transition temperature into account. Further constitutive model using the continuum approach has been utilized to explain the anisotropic elasticity damping effect and plastic deformation based on the α-helix chains, β-sheets, and β-spiral structures. The practicability to develop biomedical devices such as patient-specific-injectable scaffolds, drug carriers, and artificial muscles has been encompassed in this article. SILK ; Nanotechnology ; Chemistry ; Polymer science ; Computer science ; Materials science ; Telecommunications Silk-based biomaterials and applications ; Advanced Materials and Mechanics ; Surface Modification and Superhydrophobicity
Authors: Rabia Aziz | M. Falanga | Jelena Purenović | Simona Mancini | Patrizia Lamberti | Michele Guida
Source: Nanomaterials (review, 2023-04-15)
Field: Materials Science — Biomaterials

A Review on the Applications of Natural Biodegradable Nano Polymers in Cardiac Tissue Engineering As cardiac diseases, which mostly result in heart failure, are increasing rapidly worldwide, heart transplantation seems the only solution for saving lives. However, this practice is not always possible due to several reasons, such as scarcity of donors, rejection of organs from recipient bodies, or costly medical procedures. In the framework of nanotechnology, nanomaterials greatly contribute to the development of these cardiovascular scaffolds as they provide an easy regeneration of the tissues. Currently, functional nanofibers can be used in the production of stem cells and in the regeneration of cells and tissues. The small size of nanomaterials, however, leads to changes in their chemical and physical characteristics that could alter their interaction and exposure to stem cells with cells and tissues. This article aims to review the naturally occurring biodegradable nanomaterials that are used in cardiovascular tissue engineering for the development of cardiac patches, vessels, and tissues. Moreover, this article also provides an overview of cell sources used for cardiac tissue engineering, explains the anatomy and physiology of the human heart, and explores the regeneration of cardiac cells and the nanofabrication approaches used in cardiac tissue engineering as well as scaffolds. Tissue engineering ; Regeneration (biology) ; Nanofiber ; Nanotechnology ; Stem cell ; Biomedical engineering ; Medicine ; Materials science ; Biology ; Cell biology Electrospun Nanofibers in Biomedical Applications ; Tissue Engineering and Regenerative Medicine ; Bone Tissue Engineering Materials
Authors: Mattia Nieddu | Marta Patrian | Sara Ferrara | J. Werner | Fabian Köhler | Eduardo Anaya‐Plaza | Mauri A. Kostiainen | Hendrik Dietz | Jesús R. Berenguer | Rubén D. Costa
Source: Advanced Science (article, 2023-04-04)
Field: Materials Science — Materials Chemistry

Core–Shell Structured Fluorescent Protein Nanoparticles: New Paradigm Toward Zero‐Thermal‐Quenching in High‐Power Biohybrid Light‐Emitting Diodes Stable and efficient high-power biohybrid light-emitting diodes (Bio-HLEDs) using fluorescent proteins (FPs) in photon downconverting filters have not been achieved yet, reaching best efficiencies of 130 lm W<sup>-1</sup> stable for >5 h. This is related to the rise of the device temperature (70-80 °C) caused by FP-motion and quick heat-transmission in water-based filters, they lead to a strong thermal emission quenching followed by the quick chromophore deactivation via photoinduced H-transfer. To tackle both issues at once, this work shows an elegant concept of a new FP-based nanoparticle, in which the FP core is shielded by a SiO<sub>2</sub> -shell (FP@SiO<sub>2</sub> ) with no loss of the photoluminescence figures-of-merit over years in foreign environments: dry powder at 25 °C (ambient) or constant 50 °C, as well as suspensions in organic solvents. This enables the preparation of water-free photon downconverting coatings with FP@SiO<sub>2</sub> , realizing on-chip high-power Bio-HLEDs with 100 lm W<sup>-1</sup> stable for >120 h. Both thermal emission quenching and H-transfer deactivation are suppressed, since the device temperature holds <40 °C and remote high-power Bio-HLEDs exhibit final stabilities of 130 days compared to reference devices with water-based FP@SiO<sub>2</sub> (83 days) and FP-polymer coatings (>100 h). Hence, FP@SiO<sub>2</sub> is a new paradigm toward water-free zero-thermal-quenching biophosphors for first-class high-power Bio-HLEDs. Materials science ; Quenching (fluorescence) ; Chromophore ; Nanoparticle ; Fluorescence ; Optoelectronics ; Photoluminescence ; Nanotechnology ; Photochemistry ; Chemical engineering ; Chemistry ; Optics ; Physics Quantum Dots Synthesis And Properties ; Luminescence and Fluorescent Materials ; Photoreceptor and optogenetics research
Authors: Ryohei Akiyoshi | Akinori Saeki | Kazuyoshi Ogasawara | Daisuke Tanaka
Source: Journal of Materials Chemistry C (article, 2023-12-29)
Field: Chemistry — Inorganic Chemistry

Impact of substituent position on crystal structure and photoconductivity in 1D and 2D lead(<scp>ii</scp>) benzenethiolate coordination polymers We revealed the relationship between the inorganic (–M–S–) n network and photoconductivity by systematically synthesizing semiconductive Pb( ii ) coordination polymers with methoxybenzenethiol. Substituent ; Photoconductivity ; Polymer ; Materials science ; Position (finance) ; Crystal structure ; Photochemistry ; Polymer chemistry ; Crystallography ; Stereochemistry ; Chemistry ; Optoelectronics ; Composite material Metal-Organic Frameworks: Synthesis and Applications ; Organic and Molecular Conductors Research ; Magnetism in coordination complexes
Authors: Chaker Briki | D. O. Dunikov | Maha M. Almoneef | I. A. Romanov | A N Kazakov | Mohamed Mbarek | Abdelmajid Jemni
Source: Materials (article, 2023-08-02)
Field: Materials Science — Materials Chemistry

Experimental and Theoretical Studies of Hydrogen Storage in LaNi4.4Al0.3Fe0.3 Hydride Bed In this article, the experimental measurements of the absorption/desorption P-C-T isotherms of hydrogen in the LaNi<sub>4.4</sub>Fe<sub>0.3</sub>Al<sub>0.3</sub> alloy at different temperatures and constant hydrogen pressure have been studied using a numerical model. The mathematics equations of this model contain parameters, such as the two terms, n<sub>α</sub> and n<sub>β,</sub> representing the numbers of hydrogen atoms per site; N<sub>mα</sub> and N<sub>mβ</sub> are the receptor sites' densities, and the energetic parameters are P<sub>α</sub> and P<sub>β</sub>. All these parameters are derived by numerically adjusting the experimental data. The profiles of these parameters during the absorption/desorption process are studied as a function of temperature. Thereafter, we examined the evolution of the internal energy versus temperature, which typically ranges between 138 and 181 kJmol<sup>-1</sup> for the absorption process and between 140 and 179 kJmol<sup>-1</sup> for the desorption process. The evolution of thermodynamic functions with pressure, for example, entropy, Gibbs free energy (G), and internal energy, are determined from the experimental data of the hydrogen absorption and desorption isotherms of the LaNi<sub>4.4</sub>A<sub>l0.3</sub>F<sub>e0.3</sub> alloy. Hydride ; Hydrogen storage ; Materials science ; Metallurgy ; Hydrogen ; Waste management ; Chemistry ; Nuclear engineering ; Engineering ; Metal ; Organic chemistry Hydrogen Storage and Materials ; Ammonia Synthesis and Nitrogen Reduction ; Hybrid Renewable Energy Systems
Authors: William T. Gallonde | Corentin Poidevin | Félix Houard | Elsa Caytan | Vincent Dorcet | Arnaud Fihey | Kévin Bernot | Stéphane Rigaut | Olivier Galangau
Source: Angewandte Chemie International Edition (article, 2023-10-23)
Field: Materials Science — Biomaterials

Kinetic Delay in Cooperative Supramolecular Polymerization by Redefining the Trade‐Off Relationship between H‐Bonds and Van der Waals/π–π Stacking Interactions Abstract We here present how rebalancing the interplay between H‐bonds and dispersive forces (Van der Waals/π–π stacking) may induce or not the generation of kinetic metastable states. In particular, we show that extending the aromatic content and favouring the interchain VdW interactions causes a delay into the cooperative supramolecular polymerization of a new family of toluene bis‐amide derivatives by trapping the metastable inactive state. Stacking ; van der Waals force ; Supramolecular chemistry ; Metastability ; Polymerization ; Kinetic energy ; Chemistry ; Amide ; Chemical physics ; Toluene ; Trapping ; Crystallography ; Polymer ; Molecule ; Crystal structure ; Organic chemistry ; Physics ; Classical mechanics Supramolecular Self-Assembly in Materials ; Polydiacetylene-based materials and applications ; Luminescence and Fluorescent Materials
Authors: Claudia Manuela Santos Calado | Diogo A. Gálico | Muralee Murugesu
Source: Chemical Communications (article, 2023-01-01)
Field: Materials Science — Materials Chemistry

Intra-cluster energy transfer editing in a dual-emitting system to tap into lifetime thermometry The impact of composition control and energy transfer on luminescence thermometry was investigated in a Tb<sup>III</sup>/Eu<sup>III</sup> dual-emitting molecular cluster-aggregate, known as {Ln<sub>20</sub>}. The study of lifetime dynamics sheds new light on how one can take advantage of rational planning to enhance thermometric performance and gaining insights into intriguing optical properties. Cluster (spacecraft) ; Dual (grammatical number) ; Energy transfer ; Luminescence ; Energy (signal processing) ; Computer science ; Materials science ; Nanotechnology ; Optoelectronics ; Chemistry ; Chemical physics ; Physics ; Computer network Lanthanide and Transition Metal Complexes ; Luminescence Properties of Advanced Materials ; Magnetism in coordination complexes