jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Mobinul Islam | Md. Shahriar Ahmed | Sua Yun | Hae-Yong Kim | Kyung‐Wan Nam
Source: Nanomaterials (review, 2024-12-21)
Field: Materials Science — Materials Chemistry

Harnessing Radiation for Nanotechnology: A Comprehensive Review of Techniques, Innovations, and Application Nanomaterial properties such as size, structure, and composition can be controlled by manipulating radiation, such as gamma rays, X-rays, and electron beams. This control allows scientists to create materials with desired properties that can be used in a wide range of applications, from electronics to medicine. This use of radiation for nanotechnology is revolutionizing the way we design and manufacture materials. Additionally, radiation-induced nanomaterials are more cost effective and energy efficient. This technology is also having a positive impact on the environment, as materials are being produced with fewer emissions, less energy, and less waste. This cutting-edge technology is opening up new possibilities and has become an attractive option for many industries, from medical advancements to energy storage. It is also helping to make the world a better place by reducing our carbon footprint and preserving natural resources. This review aims to meticulously point out the synthesis approach and highlights significant progress in generating radiation-induced nanomaterials with tunable and complex morphologies. This comprehensive review article is essential for researchers to design innovative materials for advancements in health care, electronics, energy storage, and environmental remediation. Nanotechnology ; Electronics ; Carbon footprint ; Nanomaterials ; Contamination control ; Computer science ; Materials science ; Engineering ; Greenhouse gas ; Electrical engineering Luminescence Properties of Advanced Materials ; Advanced Photocatalysis Techniques ; Luminescence and Fluorescent Materials
Authors: Arif Ullah | Abdul Wahab | Sadaf Ahmad | Shahab Khan | Somnath Mukherjee | Rehmat Islam | Bakar Bin Khatab Abbasi | Mostafa A. Ismail | Kareem Shah Bukhari
Source: Reviews in Inorganic Chemistry (article, 2024-11-12)
Field: Chemistry — Organic Chemistry

Advancements in transition metal-catalyzed 1,2,3-triazole synthesis via azide–alkyne cycloaddition Abstract 1,2,3-triazoles have emerged as important structural motifs in chemical biology, attracting increasing focus in recent years because of their wide range of uses. These compounds can be efficiently synthesized using click reactions. Its versatility makes it valuable in drug discovery and materials science. Significant advancements have been made in recent years in the process of making 1,2,3-triazoles, reflecting the growing curiosity and investment in the area of research. The catalytic performance of transition metals Cu, Ir, Rh, Ru, Ni, Pd, Au, Ag, and Zn, which were used as ligands and salts in the azide–alkyne cycloaddition method of 1,2,3-triazole synthesis, has been covered in this review. Cu-complexes and salts were found to be more effective for selective synthesis among all transition metals. Furthermore, it is determined that some azide–alkyne reactions are entirely catalytic in nature and cannot be carried out as such by switching transition metals. Chemistry ; Cycloaddition ; Alkyne ; Transition metal ; Azide ; Catalysis ; Triazole ; Combinatorial chemistry ; Click chemistry ; Polymer chemistry ; Organic chemistry Click Chemistry and Applications ; Chemical Synthesis and Analysis
Authors: Zhengran He | Kyeiwaa Asare‐Yeboah | Sheng Bi
Source: Discover Electronics (article, 2024-12-19)
Field: Materials Science — Polymers and Plastics

Polystyrene applications in organic electronics Organic electronics represent a promising frontier in the research and development of flexible, lightweight, and cost-effective electronic devices. However, their broader adoption is currently impeded by several critical challenges, including material stability, low charge carrier mobility, difficulties in controlling crystallization and morphology, and overall device reliability. This article provides a detailed analysis of these challenges, and discusses how they affect the performance and longevity of organic electronic devices. It then explores the incorporation of polystyrene (PS) as a polymer additive, highlighting its effectiveness in mitigating these issues. PS, when blended with organic semiconductor materials, has been shown to significantly enhance device performance by improving molecular ordering, reducing defect density, and stabilizing interfaces. In thin film transistors, PS contributes to better mechanical stability and higher charge carrier mobility by promoting favorable phase segregation and crystallization. In phototransistors and sensors, PS enhances sensitivity and selectivity while also improving environmental resistance. Additionally, in memory devices, PS facilitates better charge storage and retention characteristics. This article underscores the critical role of PS in advancing organic electronics, and demonstrates how its strategic use can overcome some of the most persistent challenges in the field, paving the way for unlocking the full potential of organic electronic devices in commercial applications. Polystyrene ; Electronics ; Organic electronics ; Nanotechnology ; Materials science ; Engineering ; Electrical engineering ; Polymer ; Composite material ; Transistor Conducting polymers and applications ; Organic Electronics and Photovoltaics ; Covalent Organic Framework Applications
Authors: Lucía G. Parte | Sergio Fernández | Eva Sandonís | Javier Guerra | Enol López
Source: Marine Drugs (article, 2024-05-29)
Field: Chemistry — Organic Chemistry

Transition-Metal-Catalyzed Transformations for the Synthesis of Marine Drugs Transition metal catalysis has contributed to the discovery of novel methodologies and the preparation of natural products, as well as new chances to increase the chemical space in drug discovery programs. In the case of marine drugs, this strategy has been used to achieve selective, sustainable and efficient transformations, which cannot be obtained otherwise. In this perspective, we aim to showcase how a variety of transition metals have provided fruitful couplings in a wide variety of marine drug-like scaffolds over the past few years, by accelerating the production of these valuable molecules. Chemical space ; Drug discovery ; Variety (cybernetics) ; Biochemical engineering ; Combinatorial chemistry ; Nanotechnology ; Transition metal ; Catalysis ; Chemistry ; Computer science ; Materials science ; Engineering ; Organic chemistry Catalytic C–H Functionalization Methods ; Synthesis and Catalytic Reactions ; Click Chemistry and Applications
Authors: Jiamin Ma | Feilong Xing | Ken‐ichi Shimizu | Shinya Furukawa
Source: Chemical Science (article, 2024-01-01)
Field: Materials Science — Materials Chemistry

Active site tuning based on pseudo-binary alloys for low-temperature acetylene semihydrogenation The development of an efficient catalytic system for low-temperature acetylene semihydrogenation using nonnoble metals is important for the cost-effective production of polymer-grade pure ethylene. However, it remains challenging owing to the intrinsic low activity. Herein, we report a flexibly tunable catalyst design concept based on a pseudo-binary alloy, which enabled a remarkable enhancement in the catalytic activity, selectivity, and durability of a Ni-based material. A series of (Ni<sub>1-<i>x</i></sub>Cu<sub><i>x</i></sub>)<sub>3</sub>Ga/TiO<sub>2</sub> catalysts exhibiting L1<sub>2</sub>-type pseudo-binary alloy structures with various Cu contents (<i>x</i> = 0.2, 0.25, 0.33, 0.5, 0.6, and 0.75) were prepared for active site tuning. The optimal catalyst, (Ni<sub>0.8</sub>Cu<sub>0.2</sub>)<sub>3</sub>Ga/TiO<sub>2</sub>, exhibited outstandingly high catalytic activity among reported 3d transition metal-based systems and excellent ethylene selectivity (96%) and long-term stability (100 h) with near full conversion even at 150 °C. A mechanistic study revealed that Ni<sub>2</sub>Cu hollow sites on the (111) surface weakened the strong adsorption of acetylene and vinyl adsorbate, which significantly accelerated the hydrogenation process and inhibited undesired ethane formation. Acetylene ; Catalysis ; Selectivity ; Doping ; Materials science ; Chemical engineering ; Binary number ; Chemical physics ; Inorganic chemistry ; Chemistry ; Organic chemistry ; Optoelectronics Porphyrin and Phthalocyanine Chemistry ; Catalysis and Oxidation Reactions ; Mesoporous Materials and Catalysis
Authors: A. R. Bonity J. Lutton‐Gething | Ben F. Spencer | George F. S. Whitehead | Íñigo J. Vitórica‐Yrezábal | Daniel Lee | Martin P. Attfield
Source: Chemistry of Materials (article, 2024-02-08)
Field: Chemistry — Inorganic Chemistry

Disorder and Sorption Preferences in a Highly Stable Fluoride-Containing Rare-Earth <i>fcu</i>-Type Metal–Organic Framework Rare-earth (RE) metal-organic frameworks (MOFs) synthesized in the presence of fluorine-donating modulators or linkers are an important new subset of functional MOFs. However, the exact nature of the RE<sub><i>a</i></sub>X<sub><i>b</i></sub> core of the molecular building block (MBB) of the MOF, where X is a μ<sub>2 or 3</sub>-bridging group, remains unclear. Investigation of one of the archetypal members of this family with the stable <i>fcu</i> framework topology, Y-fum-<i>fcu</i>-MOF (<b>1</b>), using a combination of experimental techniques, including high-field (20 T) solid-state nuclear magnetic resonance spectroscopy, has determined two sources of framework disorder involving the μ<sub>3</sub>-X face-capping group of the MBB and the fumarate (fum) linker. The core of the MBB of <b>1</b> is shown to contain a mixture of μ<sub>3</sub>-F<sup>-</sup> and (OH)<sup>-</sup> groups with preferential occupation at the crystallographically different face-capping sites that result in different internally lined framework tetrahedral cages. The fum linker is also found to display a disordered arrangement involving bridging- or chelating-bridging bis-bidentate modes over the fum linker positions without influencing the MBB orientation. This linker disorder will, upon activation, result in the creation of Y<sup>3+</sup> ions with potentially one or two additional uncoordinated sites possessing differing degrees of Lewis acidity. Crystallographically determined host-guest relationships for simple sorbates demonstrate the favored sorption sites for N<sub>2</sub>, CO<sub>2</sub>, and CS<sub>2</sub> molecules that reflect the chemical nature of both the framework and the sorbate species with the structural partitioning of the μ<sub>3</sub>-groups apparent in determining the favored sorption site of CS<sub>2</sub>. The two types of disorder found within <b>1</b> demonstrate the complexity of fluoride-containing RE-MOFs and highlight the possibility to tune this and other frameworks to contain different proportions and segregations of μ<sub>3</sub>-face-capping groups and degrees of linker disorder for specifically tailored applications. Linker ; Sorption ; Denticity ; Chemistry ; Metal-organic framework ; Molecule ; Crystallography ; Bridging (networking) ; Metal ; Organic chemistry ; Crystal structure Metal-Organic Frameworks: Synthesis and Applications ; Magnetism in coordination complexes ; Lanthanide and Transition Metal Complexes
Authors: Ribooga Chang | Zoltán Bacsik | Guojun Zhou | Maria Strømme | Zhehao Huang | Michelle Åhlén | Ocean Cheung
Source: Nano Letters (article, 2024-05-30)
Field: Chemistry — Inorganic Chemistry

Achieving Molecular Sieving of CO<sub>2</sub> from CH<sub>4</sub> by Controlled Dynamical Movement and Host–Guest Interactions in Ultramicroporous VOFFIVE-1-Ni by Pillar Substitution Engineering the building blocks in metal-organic materials is an effective strategy for tuning their dynamical properties and can affect their response to external guest molecules. Tailoring the interaction and diffusion of molecules into these structures is highly important, particularly for applications related to gas separation. Herein, we report a vanadium-based hybrid ultramicroporous material, VOFFIVE-1-Ni, with temperature-dependent dynamical properties and a strong affinity to effectively capture and separate carbon dioxide (CO<sub>2</sub>) from methane (CH<sub>4</sub>). VOFFIVE-1-Ni exhibits a CO<sub>2</sub> uptake of 12.08 wt % (2.75 mmol g<sup>-1</sup>), a negligible CH<sub>4</sub> uptake at 293 K (0.5 bar), and an excellent CO<sub>2</sub>-over-CH<sub>4</sub> uptake ratio of 2280, far exceeding that of similar materials. The material also exhibits a favorable CO<sub>2</sub> enthalpy of adsorption below -50 kJ mol<sup>-1</sup>, as well as fast CO<sub>2</sub> adsorption rates (90% uptake reached within 20 s) that render the hydrolytically stable VOFFIVE-1-Ni a promising sorbent for applications such as biogas upgrading. Pillar ; Chemistry ; Materials science ; Nanotechnology ; Chemical physics ; Crystallography ; Chemical engineering Metal-Organic Frameworks: Synthesis and Applications ; Catalysis and Oxidation Reactions ; Catalytic Processes in Materials Science
Authors: Capucine Cleret de Langavant | Jisoo Oh | Florian Lochon | Sandrine Tusseau‐Nenez | Virginie Ponsinet | Alexandre Baron | Thierry Gacoin | Jongwook Kim
Source: Nano Letters (article, 2024-02-27)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Near-Infrared Dual-Band LSPR Coupling in Oriented Assembly of Doped Metal Oxide Nanocrystal Platelets Coupling effects of localized surface plasmon resonance (LSPR) represent an efficient means to tune the plasmonic modes and to enhance the near-field. While LSPR coupling in metal nanoparticles has been extensively explored, limited attention has been given to heavily doped semiconductor nanocrystals. Here, we investigate the LSPR coupling behavior of Cs-doped tungsten oxide (Cs<sub><i>x</i></sub>WO<sub>3-δ</sub>) nanocrystal platelets as they undergo an oriented assembly into parallel stacks. The oriented assembly was achieved by lowering the dispersion stability of the colloidal nanoplatelets, of which the basal surface was selectively ligand-functionalized. This assembly induces simultaneous blue-shifts and red-shifts of dual-mode LSPR peaks without compromising the intensity and quality factor. This stands in contrast to the significant damping, broadening, and overall red-shift of the LSPR observed in random assemblies. Computational simulations successfully replicate the experimental observations, affirming the potential of this coupling phenomenon of near-infrared dual-mode LSPR in diverse applications including solar energy, bio-optics, imaging, and telecommunications. Materials science ; Nanocrystal ; Surface plasmon resonance ; Plasmon ; Nanotechnology ; Doping ; Nanoparticle ; Optoelectronics ; Coupling (piping) Gold and Silver Nanoparticles Synthesis and Applications ; Plasmonic and Surface Plasmon Research ; Nonlinear Optical Materials Studies
Authors: Stéphanie Engelen | Neil D. Dolinski | Chuqiao Chen | Elina Ghimire | Charlie A. Lindberg | Alex E. Crolais | Natsumi Nitta | Johan M. Winne | Stuart J. Rowan | Filip Du Prez
Source: Angewandte Chemie (article, 2024-01-10)
Field: Materials Science — Polymers and Plastics

Vinylogous Urea—Urethane Vitrimers: Accelerating and Inhibiting Network Dynamics through Hydrogen Bonding Abstract Vinylogous urethane (VU O ) based polymer networks are widely used as catalyst‐free vitrimers that show rapid covalent bond exchange at elevated temperatures. In solution, vinylogous ureas (VU N ) undergo much faster bond exchange than VU O and are highly dynamic at room temperature. However, this difference in reactivity is not observed in their respective dynamic polymer networks, as VU O and VU N vitrimers prepared herein with very similar macromolecular architectures show comparable stress relaxation and creep behavior. However, by using mixtures of VU O and VU N linkages within the same network, the dynamic reactions can be accelerated by an order of magnitude. The results can be rationalized by the effect of intermolecular hydrogen bonding, which is absent in VU O vitrimers, but is very pronounced for vinylogous urea moieties. At low concentrations of VU N , these hydrogen bonds act as catalysts for covalent bond exchange, while at high concentration, they provide a pervasive vinylogous urea ‐ urethane (VU) network of strong non‐covalent interactions, giving rise to phase separation and inhibiting polymer chain dynamics. This offers a straightforward design principle for dynamic polymer materials, showing at the same time the possible additive and synergistic effects of supramolecular and dynamic covalent polymer networks. Covalent bond ; Hydrogen bond ; Polymer ; Catalysis ; Chemistry ; Network covalent bonding ; Supramolecular chemistry ; Polymer chemistry ; Urea ; Intermolecular force ; Dynamic covalent chemistry ; Organic chemistry ; Molecule Polymer composites and self-healing ; Photochromic and Fluorescence Chemistry ; Polydiacetylene-based materials and applications
Authors: Pei-Lin Yin | Demei Sun | Yucen Deng | Xinyuan Zhu | Youfu Wang | Jinghui Yang | Xuesong Feng
Source: Theranostics (article, 2024-01-01)
Field: Materials Science — Biomaterials

Metal-organic cage as a theranostic nanoplatform for magnetic resonance imaging guided chemodynamic therapy <b>Rationale:</b> Theranostic nanoplatforms exert a vital role in facilitating concurrent real-time diagnosis and on-demand treatment of diseases, thereby making contributions to the improvement of therapeutic efficacy. Nevertheless, the structural intricacy and the absence of well-defined integration of dual functionality persist as challenges in the development of theranostic nanoplatforms. <b>Methods:</b> We develop an atomically precise theranostic nanoplatform based on metal-organic cage (MOC) to provide magnetic resonance imaging (MRI) guided chemodynamic therapy (CDT) for cancer therapy and assess the theranostic performance both <i>in vitro</i> and <i>in vivo</i>. Through UV-vis spectroscopy, electron paramagnetic resonance (EPR), confocal microscopy, flow cytometry, immunofluorescence staining, and western blotting, the ability of MOC-Mn to generate •OH and the subsequent inhibition of HeLa cells was confirmed. <b>Results:</b> The MOC-Mn composed of manganese and calixarene was successfully synthesized and comprehensively characterized. The catalytic activity of manganese within MOC-Mn facilitated the efficient generation of hydroxyl radicals (•OH) through a Fenton-like reaction, leveraging the high concentrations of hydrogen peroxide in the tumor microenvironment (TME). Additionally, its capacity to prolong the T1 relaxation time and augment the MR signal was observed. The theranostic efficacy was verified <i>via</i> rigorous <i>in vitro</i> and <i>in vivo</i> experiments, indicating that MOC-Mn offered clearer visualization of tumor particulars and substantial suppression of tumor growth. <b>Conclusion:</b> This study showcases a precise MRI-guided CDT theranostic nanoplatform for cancer therapy, thereby promoting the advancement of precise nanomedicine and structure-function research. Magnetic resonance imaging ; Cage ; Chemistry ; Nuclear magnetic resonance ; Nanotechnology ; Materials science ; Medicine ; Radiology ; Physics Nanoparticle-Based Drug Delivery ; Nanoplatforms for cancer theranostics ; Supramolecular Chemistry and Complexes
Authors: Hongxiang Chen | Enhui Zhao | Xiaochun Wen | Sheng Liu | Shiyu Li | Jiantao Fu | Hengzhong Fan | Bing Xiao | Yongsheng Zhang
Source: Journal of Advanced Ceramics (article, 2024-10-18)
Field: Materials Science — Materials Chemistry

Phase engineering on high-entropy transition metal dichalcogenides and the entropy-enhanced thermoelectric performance High-entropy structures in layered compounds, especially transitional metal dichalcogenides (TMDCs), have powered the field with disordered and versatile chemical compositions, showing great potential in various functional applications, including energy storage and catalysis. However, the reported high-entropy phases are mainly 1T phases, 2H phases are rare, and approximately 3R phases are still lacking. Here, phase engineering of high-entropy TMDCs is achieved by tuning the chemical composition of (Mo<sub>0.5</sub>W<sub>0.5</sub>)<sub>1−<i>x</i></sub>(Nb<sub>0.5</sub>Ta<sub>0.5</sub>)<sub><i>x</i></sub>Se<sub>2+<i>δ</i></sub>, 0 ≤ <i>x</i> &lt; 1, and −0.1 ≤ <i>δ</i> ≤ 0.3. A phase diagram is constructed to guide the synthesis of pure 2H/3R phases over a wide composition/entropy range. The increase in VB-group element content and Se overdose facilitated the formation of 3R phases, whereas the opposite occurred for 2H phases. Thermodynamic first-principles calculations evaluate the stability of phases in different polytypes and compositions, matching well with the composition-dependent crystalline habits. Moreover, the optimized thermoelectric performance, with a figure of merit (<i>zT</i> = 0.36@723 K) in 2H phase of <i>x</i> = 0.2, is attributed to the low thermal conductivity (<i>κ</i>) caused by the high-entropy effect, which is one of the highest among (Mo/W)Se<sub>2</sub>-based materials. Our work enriches high-entropy TMDCs with versatile polytypes, expanding their potential uses for various fields. Structural material ; Materials science ; Thermoelectric effect ; Transition metal ; Entropy (arrow of time) ; Thermodynamics ; Phase transition ; Condensed matter physics ; Nanotechnology ; Metallurgy ; Physics ; Chemistry Advanced Thermoelectric Materials and Devices ; 2D Materials and Applications ; Machine Learning in Materials Science
Authors: Charlotte Bocquelet | Nathan Rougier | Huu-Nghia Le | Laurent Veyre | Chloé Thieuleux | Roberto Melzi | Armin Purea | Daniel Banks | James Kempf | Quentin Stern | Ewoud Vaneeckhaute | Sami Jannin
Source: Science Advances (article, 2024-12-04)
Field: Chemistry — Spectroscopy

Boosting <sup>1</sup> H and <sup>13</sup> C NMR signals by orders of magnitude on a bench Sensitivity is often the Achilles' heel of liquid-state nuclear magnetic resonance (NMR) experiments. This problem is perhaps most pressing at the lowest fields (e.g., 80-MHz <sup>1</sup>H frequency), with rapidly increasing access to NMR through benchtop systems, but also sometimes for higher-field NMR systems from 300 MHz to 1.2 GHz. Hyperpolarization by dissolution dynamic nuclear polarization (dDNP) can address this sensitivity limitation. However, dDNP implies massive and complex cryogenic and high-field instrumentation, which cannot be installed on the bench. We introduce here a compact helium-free 1-T tabletop polarizer as a simple and low-cost alternative. After freezing and polarizing the frozen analyte solutions at 77 K, we demonstrate <sup>1</sup>H signal enhancement factors of 100, with rapid 1-s buildup times. The high polarization is subsequently transferred by <sup>1</sup>H→<sup>13</sup>C cross polarization (CP) to <sup>13</sup>C spins. Such a simple benchtop polarizer, in combination with hyperpolarizing solid matrices (HYPSOs), may open the way to replenishable hyperpolarization throughout multiple liquid-state NMR experiments. Hyperpolarization (physics) ; Polarizer ; Polarization (electrochemistry) ; Nuclear magnetic resonance spectroscopy ; Spins ; Nuclear magnetic resonance ; Spin isomers of hydrogen ; Induced polarization ; Materials science ; Analytical Chemistry (journal) ; Physics ; Chemistry ; Optics ; Condensed matter physics ; Birefringence ; Chromatography ; Hydrogen Advanced NMR Techniques and Applications ; Atomic and Subatomic Physics Research ; Solid-state spectroscopy and crystallography