jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: S N Fang | Yu Liao | Jia-Hao Tang | Mingxiu Tang | Fuxin Zheng | Zhenxiang Pan | Yingnan Feng | Gang Han
Source: Science Advances (article, 2025-12-19)
Field: Materials Science — Materials Chemistry

Vertical covalent organic framework interlayer channels enable ultraselective molecular separations This work addresses the long-standing challenge of insufficient permselectivity in two-dimensional (2D) covalent organic framework (COF) membranes by developing a generalizable and potentially scalable self-templating interfacial assembly method to synthesize vertically aligned 2D COF polycrystalline nanofilms. Experiments and molecular simulations reveal that molecular amphiphilicity-driven spontaneous confinement and directional alignment of framework-building units at the organic/aqueous interface instigate the vertical growth of COF monolayers. The superior sieving ability of sub-4 angstrom interlayer nanochannels enables vertically aligned COF membranes to efficiently intercept salt ions, electrically neutral small molecules, and hazardous chemicals, outperforming conventional COF membranes. The implemented strategy can be extended to other building blocks and framework topologies, opening up avenues for fine-tuning the pore structure of 2D COF membranes. Covalent organic framework ; Covalent bond ; Membrane ; Crystallite ; Work (physics) ; Scalability ; Angstrom ; Hazardous waste Covalent Organic Framework Applications ; Membrane Separation Technologies ; Supramolecular Chemistry and Complexes
Authors: Rohit Kumar Singh | Neha Kumari | Ashok Yadav | Anjani Kumar Pandey
Source: Coordination Chemistry Reviews (article, 2025-12-10)
Field: Chemistry — Inorganic Chemistry

Tris(2-pyridylmethyl)amines as a versatile scaffold for sustainable catalysis: From coordination to conversion Catalysis ; Nitrene ; Steric effects ; Reactivity (psychology) ; Transition metal ; Selectivity ; Green chemistry ; Coordination complex Metal-Catalyzed Oxygenation Mechanisms ; Asymmetric Hydrogenation and Catalysis ; Magnetism in coordination complexes
Authors: Alebachew Demoz
Source: Discover Applied Sciences (article, 2025-10-16)
Field: Materials Science — Biomaterials

Perspectives on development of nanofibrillated cellulose for mine waste tailings management Abstract There is a huge inventory of fine tailings from mining operations in tailings storage facilities (TSFs) awaiting remediation operations. Returning TSFs to their original states as dryland is the preferred closure action and chemical additives are used in the necessary thickening (dewatering) step of the fine tailings. Synthetic fossil fuel-based polymers known as flocculants are used in the dewatering process industrially. Nanofibrillated cellulose (NFC) is a biomass-derived product which can be developed to substitute the prevailing synthetic flocculants. This review describes the pertinent subjects related to the extraction of NFC, chemical modification, their physical and chemical characterization and evaluations as flocculants. NFC has been separated from biomass by physical, biological, and chemical processes, including combinations thereof. Properties which flocculants possess that pristine NFC lacks are mainly incorporated by chemical modifications. Chemical modifications take place via the hydroxyl groups that surround the polysaccharide skeletal structure of NFC. Prospective chemical modification reactions to produce effective flocculants are discussed. Other properties that can fine tune flocculation performance of NFC such as charge type, density, and size are also covered. The preparation of new, modified-NFC flocculants needs to include characterizations to provide detailed information about flocculants’ particle dimensions, morphology, surface charge, surface chemistry, crystallinity, and flocculant rheological properties. Methods to evaluate the flocculation performances and the resulting deposits of modified NFC treated geotechnical properties are presented to wrap the review. The results of such a study will enable correlation of modified-NFCs with their efficacy in the treatment of mine waste fine tailings. Flocculation ; Tailings ; Dewatering ; Nanocellulose ; Environmental remediation ; Cellulose ; Extraction (chemistry) ; Biomass (ecology) Advanced Cellulose Research Studies ; Enzyme-mediated dye degradation ; Memory, Trauma, and Testimony
Authors: Gang Wang | Xian Du | Zihao Nie | Hengzhi You | Qin Yin
Source: Chinese Journal of Chemistry (article, 2025-08-12)
Field: Chemistry — Inorganic Chemistry

Ru‐Catalyzed Asymmetric Reductive Amination of Benzyl Ketones: Asymmetric Control Enabled by Synergistic Interaction of Both Chiral Bisphosphine and Chiral Amino‐Acid Ligands Comprehensive Summary Chiral methylbenzylamines and arylbenzylamines are important structural motifs that are widely present in many bioactive compounds and drug molecules. In this study, we applied readily available ruthenium complexes, comprised of a bisphosphine and two chiral amino acid anionic ligands, in asymmetric reductive amination of benzyl ketones with ammonium salts for the first time. Excellent enantioselectivities (up to 99% ee) have been achieved by merely fine‐tuning the amino acid structure, thereby decreasing the need for more expensive bisphosphine ligands. We anticipate that this new method will find broad applications in organic synthesis, especially in the preparation of chiral pharmaceutical intermediates. Chemistry ; Reductive amination ; Amination ; Catalysis ; Combinatorial chemistry ; Asymmetric hydrogenation ; Organic chemistry ; Enantioselective synthesis ; Medicinal chemistry Asymmetric Hydrogenation and Catalysis ; Catalytic C–H Functionalization Methods ; Synthesis and Catalytic Reactions
Authors: Yuzhen Zhao | Yongle Wu | Xiangke Jiao | Yang Zhao | Ruijuan Yao | Zhun Guo | Dong Wang | Yi Luan
Source: Solar Energy Materials and Solar Cells (article, 2025-02-06)
Field: Materials Science — Polymers and Plastics

Infrared shielding achieved by the bilayer broadband reflective film possessing the PSCLC-PVA-PSCLC structure Bilayer ; Infrared ; Electromagnetic shielding ; Broadband ; Materials science ; Optics ; Optoelectronics ; Shielding effect ; Chemistry ; Composite material ; Physics ; Membrane Transition Metal Oxide Nanomaterials ; Polymer Nanocomposite Synthesis and Irradiation ; Optical Polarization and Ellipsometry
Authors: Jean Colombari Neto | Ayman Larek | Juan F. Miravet | Minoru Yamaji | Francisco Galindo
Source: Advanced Optical Materials (article, 2025-08-30)
Field: Materials Science — Materials Chemistry

Organic, Transparent, and Flexible Films Exhibiting White‐Light Emission via Polymer‐Network Engineering: A Non‐Dye‐Centric Strategy Abstract White light‐emitting (WLE) materials are often engineered by tailoring fluorescent dyes to generate balanced emission spectra. In such dye‐focused methodologies, the matrix plays a minimal role beyond hosting the emitters. However, this strategy can be unpredictable due to the complexity of modifying dye photophysics with precision. In the work here presented, a matrix‐driven approach to WLE is introduced, where the properties of the polymeric host are leveraged to regulate light emission. By adjusting the composition of the polymer network with variation in monomers and cross‐linkers, it is possible to control the spatial arrangement and interaction of two dyes, enabling effective color mixing. The system employs readily available monomers, 2‐hydroxyethyl methacrylate (HEMA) and poly(ethylene glycol) dimethacrylate (PEGDMA), along with two simple, synthetically accessible dyes: a pyridinium salt and a pyrylium derivative. The resulting hydrogel‐based films emit white light with Commission Internationale de l'Éclairage (CIE) chromaticity coordinates at (0.30, 0.33) and a high photoluminescence quantum yield of 0.51. The films are highly transparent, flexible, and suitable for back‐illumination, making them excellent candidates for integration into next‐generation optoelectronic platforms, such as bendable lighting elements, transparent displays, and wearable light sources. This strategy highlights the untapped potential of polymer matrices in fine‐tuning emissive behavior. Materials science ; White light ; Polymer ; Aggregation-induced emission ; Nanotechnology ; Optoelectronics ; Composite material ; Optics ; Fluorescence Luminescence and Fluorescent Materials ; Organic Light-Emitting Diodes Research ; Organic Electronics and Photovoltaics
Authors: В. С. Павлов | D. V. Bruter | A. V. Efimov | А. Г. Попов | І. І. Іванова | Vladimir L. Zholobenko
Source: Microporous and Mesoporous Materials (article, 2025-04-17)
Field: Chemistry — Inorganic Chemistry

Two-stage crystallisation of the MFI zeolite: kinetic control for efficient catalyst development Zeolite ; Catalysis ; Crystallization ; Chemical engineering ; Stage (stratigraphy) ; Kinetic energy ; Molecular sieve ; Materials science ; Chemistry ; Organic chemistry ; Geology ; Engineering ; Physics Zeolite Catalysis and Synthesis ; Catalytic Processes in Materials Science ; Catalysis and Hydrodesulfurization Studies
Authors: Qiming Liang | Henan Li | Wan Xu | Junyi Lu | Ruijie Ma | Qingqing Bai | Xiaokang Sun | Mingqing Chen | Liangxiang Zhu | Qian Liu | Yuting Guo | Guangye Zhang | Qifan Xue | Agnieszka Iwan | Pei Cheng | Hanlin Hu | Hua Wang | Junwu Chen | Li Niu | Huiliang Sun
Source: Angewandte Chemie (article, 2025-01-23)
Field: Materials Science — Polymers and Plastics

Dual‐Asymmetric Solid Additive Enables Eco‐friendly All‐Polymer Solar Cells with Over 19 % Efficiency and Excellent Stability Abstract The optimization of morphology in all‐polymer solar cells (all‐PSCs) often relies on the use of solvent additives. However, their tendency to remain trapped in the device due to high boiling points leads to performance degradation over time. In this study, we introduce a novel approach involving the design and synthesis of one dual‐asymmetric solid additive featuring mono‐brominated‐asymmetric dithienothiophene (SL‐1). Leveraging the synergistic effects of asymmetric substitution and core structures, fine‐tuning the molecule dipole moment enhancing solid additive interactions with host materials, thereby regulating polymer aggregation and influencing blend morphology during device fabrication. This results in highly ordered π–π stacking and a favorable phase‐separated morphology within all‐polymer active layer. Our work achieved a record efficiency of 19.19 % in eco‐friendly all‐PSCs, significantly outperforming SL‐0 (18.37 %) and SL‐2 (16.60 %), both featuring an asymmetric core. Furthermore, SL‐1‐treated all‐PSCs retain over 90 % of their initial efficiency after 2140 hours of operation, with an extrapolated T 80 lifetime reaching 12400 hours. This represents a significant improvement in stability compared to devices treated with solvent additive (1‐CN), which typically exhibits a T 90 lifetime of 700 hours. Our findings underscore the efficacy of utilizing dual‐asymmetric solid additives as a straightforward and viable strategy for optimizing all‐polymer morphology. SL‐1 represents a promising advancement towards eco‐friendly fabrication and application of high‐efficiency and stable all‐PSCs. Environmentally friendly ; Polymer ; Dual (grammatical number) ; Materials science ; Nanotechnology ; Chemical engineering ; Chemistry ; Composite material Conducting polymers and applications ; Organic Electronics and Photovoltaics ; TiO2 Photocatalysis and Solar Cells
Authors: Gina Stuhrmann | Bastian Weinert | Stefanie Dehnen
Source: Chemical Communications (article, 2025-01-01)
Field: Chemistry — Organic Chemistry

From non-innocent ionic liquids to reactive agents in the synthesis of chalcogenido metalate compounds Chalcogenido metalate compounds are an exceptional class of inorganic materials, ranging from discrete clusters and simple binary solids to complex multinary three-dimensional structures with open frameworks. This structural and compositional diversity generally enables a wide range of applications, including opto-electronics, ion separation and catalysis. Traditionally, chalcogenido metalates have been synthesized using flux synthesis or high-temperature solid-state reactions as well as solvothermal approaches. More recently, this was shifted towards lower-temperature approaches, not only for economic and environmental reasons, but also to access previously inaccessible compounds. In this context, ionic liquids (ILs) have become important reaction media. However, while ILs have been famous for their role as inert reaction media that provide a controlled environment for crystallization, they can also be actively involved in the reactions under certain conditions and thus influence the formation and stabilization of the new chalcogenido metalate compounds. This can take place by adopting a templating role or through the transfer of (functional) groups, which enables access to modifications and variations of the corresponding substructures. This dual role of ILs-as reaction media and reactive agents-provides new opportunities for fine-tuning the structural and electronic properties of chalcogenido metalate compounds. In this review, the multifaceted roles of non-innocent ILs in the synthesis of chalcogenido metalate compounds are explored, with particular attention on their effects on cluster formation, cluster stability, and their ultimate effect on the compounds' properties. Ionic liquid ; Cluster (spacecraft) ; Catalysis ; Inert ; Ionic bonding ; Flux (metallurgy) ; Characterization (materials science) ; Ion Sulfur-Based Synthesis Techniques ; Organoselenium and organotellurium chemistry ; Organometallic Compounds Synthesis and Characterization
Authors: Marlène Arnold | Jasmin Hammes | Mike Ong | Christian Mück‐Lichtenfeld | Johannes M. Wahl
Source: Angewandte Chemie (article, 2025-04-08)
Field: Chemistry — Organic Chemistry

Nitrogen Insertion via Asymmetric Condensation and Chirality Transfer: A Stereodivergent Entry to Cyanocyclopropanes Abstract The condensation of prochiral cyclobutanones and diphenylphosphinyl hydroxylamine is achieved under Brønsted acid catalysis. Interestingly, the competing aza‐Baeyer–Villiger reaction is completely suppressed and the axially chiral oxime esters can be isolated in excellent yield and selectivity (up to 96% yield, up to 97:3 er). Computational analysis highlights the crucial role of the Brønsted acid in facilitating a successful condensation. Building on the inherent reactivity of the corresponding oxime esters, a one‐pot protocol toward cyanocyclopropanes was discovered, which establishes two consecutive stereocenters. This unusual ring contraction is triggered by strong base and permits an axial‐to‐point chirality transfer with good enantiospecificity (up to 98% es). Fine‐tuning the reaction parameters enables stereodivergent access to both diastereomers of the cyanocyclopropanes, and the utility of this method is demonstrated through the formal synthesis of the drug tasimelteon. Chirality (physics) ; Condensation ; Enantioselective synthesis ; Nitrogen ; Chemistry ; Stereochemistry ; Catalysis ; Organic chemistry ; Physics ; Chiral symmetry breaking ; Symmetry breaking Cyclopropane Reaction Mechanisms ; Asymmetric Synthesis and Catalysis ; Asymmetric Hydrogenation and Catalysis
Authors: Shalik Ram Joshi | Hyun Ji Lee | Soohoon Lee | Juwan Choi | Sunghwan Kim
Source: ACS Applied Polymer Materials (article, 2025-03-24)
Field: Materials Science — Biomaterials

Ultrathin and Breathable Silk-Protein Electronic Tattoos for Iontophoretic Transdermal Drug Delivery Transdermal drug delivery (TDD) is emerging as a favorable alternative to traditional oral and injectable drug administration routes, offering a noninvasive, pain-free option with controlled and sustainable drug delivery. However, developing a TDD patch that delivers drugs with a high efficiency while being skin-friendly is still challenging. Here, we report an ultrathin and breathable iontophoretic patch for TDD application. The ultrathin dye-loaded electronic tattoo (UDET) consists of silk nanofibers (SNFs) and graphene. Cationic rhodamine B (RB) and methylene blue (MB) model drugs are incorporated in SNFs. The UDETs can be seamlessly affixed to nonuniform and pliable pigskin. The performance of the iontophoretic system can be fine-tuned by adjusting the applied voltage and duration of the iontophoresis process. The UDET delivers the RB and MB model drugs into pigskin up to a depth of >800 μm under a bias voltage of 20 V within 2 h. Additionally, to evaluate the potential for real-world applications, the diffusion of Dextran molecules of varying molecular weights was examined. The penetration depth of low molecular weight Dextran (Dex-10,000) was significantly higher than that of high molecular weight Dextran (Dex-70,000), demonstrating the influence of molecular size on diffusion efficiency. Our results show the UDET patch’s controllable and efficient delivery capability as well as underscore the potential of UDETs in augmenting TDD through controlled electric fields. This feature would be pivotal for the delivery of therapeutics in scenarios where conventional methods may be inadequate. Transdermal ; Iontophoresis ; SILK ; Drug delivery ; Drug ; Pharmacology ; Materials science ; Medicine ; Nanotechnology ; Composite material Silk-based biomaterials and applications ; Nanofabrication and Lithography Techniques ; Polydiacetylene-based materials and applications
Authors: Anupam Choudhary | Garima | Manish Kumar | Ajay Sharma | Raman Kumar | Vivek Sheel
Source: Inorganic Chemistry Communications (article, 2025-07-01)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Recent trends in fabrication of oxides/sulfide of vanadium, molybdenum and their graphene based nanocomposite for energy applications Graphene ; Nanocomposite ; Fabrication ; Vanadium ; Materials science ; Molybdenum ; Sulfide ; Nanotechnology ; Metallurgy ; Chemical engineering Supercapacitor Materials and Fabrication ; Transition Metal Oxide Nanomaterials ; Advancements in Battery Materials
Authors: Antoine Adjaoud | Anae Girault-Fodil | Farida Baraka | Vincent Boulic | Benoît Marcolini | Laura Puchot | Pierre Verge
Source: Angewandte Chemie (article, 2025-05-08)
Field: Materials Science — Materials Chemistry

Dynamic Exchange Reactions as Self‐Blowing Agents for the Production of Reprocessable Foams Abstract Thermosetting foams are crucial in the polymer industry due to their unique lightweight and durable properties. Recent developments in sustainable chemistry intend to align foam lifecycles toward circular economy principles and reduce their environmental impact. In this study, this issue is addressed thanks to an innovative and straightforward approach, enabling the manufacture of single‐component self‐blowing vitrimer foam. The self‐blowing mechanism originates from the in situ formation and release of the blowing agent via the polycondensation of an alkylester. This alkylester, composed of a benzoxazine matrix terminated with a β ‐hydroxylamine, undergoes in a cascade mechanism ring opening polymerization (ROP) and irreversible transesterification exchange, which in turn generates an alcohol gas. The cascade polymerization and alcohol release were optimized and fine‐tuned to develop various foams that have an open‐cell morphology, volume expansion of 223%–853%, porosity of 67%–86%, and compression modulus in the range of 3–38 MPa. The polymerization process results in a dual crosslinked poly(benzoxazine‐ co ‐ester) network composed of β ‐hydroxylamine moieties, alkyl, and β ‐aminoester bonds, enabling reversible transesterification dynamic exchanges and mechanical reprocessability, achieving a foam‐to‐resin reprocessing. Blowing agent ; Production (economics) ; Chemical engineering ; Chemistry ; Materials science ; Organic chemistry ; Polyurethane ; Engineering Pickering emulsions and particle stabilization
Authors: Xiao Tang | Erik V. Van der Eycken | Liangliang Song
Source: Chinese Chemical Letters (article, 2025-08-07)
Field: Chemistry — Organic Chemistry

Transition metal-catalyzed C-H activation/annulation for the construction of unnatural amino acids and peptides Annulation ; Catalysis ; Chemistry ; Transition metal ; Amino acid ; Stereochemistry ; Combinatorial chemistry ; Metal ; Medicinal chemistry ; Organic chemistry ; Biochemistry Catalytic C–H Functionalization Methods ; Synthesis and Catalytic Reactions ; Asymmetric Hydrogenation and Catalysis
Authors: Akash Verma | Digambar Kumar Waiker | Piyush Gupta | Mohit Kumar | S. K. Shrivastava
Source: European Journal of Medicinal Chemistry (article, 2025-09-14)
Field: Chemistry — Organic Chemistry

Bioisosterism: an approach to develop new anti-cancer agents Drug ; Metabolic stability ; Drug discovery ; Cancer treatment ; Small molecule ; Drug resistance ; Lead compound Synthesis and biological activity
Authors: Tin Klačić | Matej Masjar | Davor Kovačević
Source: Croatica Chemica Acta (article, 2025-01-01)
Field: Materials Science — Surfaces, Coatings and Films

Effect of Polyelectrolyte Molecular Weight on the Formation and Properties of Polyelectrolyte Multilayers Polymers whose repeating units bear an electrolyte group, so-called polyelectrolytes, are the main building blocks of polyelectrolyte multilayers (PEMs).These thin organic films are versatile nanomaterials with applications in many fields.The main reason for their widespread applications lies in the ability to fine-tune their properties simply by adjusting the experimental conditions of their preparation.One of these parameters is the molecular weight of polyelectrolytes utilized for PEM preparation.Although about three decades have passed since the preparation of the first PEM, consensus among scientists about the influence of polyelectrolyte molecular weight on the properties of PEMs still has not been achieved.For example, several studies have shown that PEM thickness increases with the increase of polymer molecular weight, others that PEM thickness decreases with polymer molecular weight, and third that molecular weight does not influence film thickness.To shed some light on these somehow contradictory findings, we report here the results of a study in which we explore the influence of polyelectrolyte molecular weight on the properties of PEM not as an independent parameter but as a variable related to the polyelectrolyte degree of charging.For that purpose, we prepared PEMs via the layer-by-layer assembly with two distinct molecular weights of poly(allylamine hydrochloride) and poly(acrylic acid) at pH = 5.0, 8.0 (with and without NaCl), and 10.0.In the end, we found that the thickness and, for the most part, the surface roughness of prepared films increased with higher molecular weights of polyelectrolytes in all examined conditions except at pH = 8.0.In that condition, the molecular weight of polymers did not affect the PEM properties because polyelectrolytes are highly charged at that pH and adsorb to a surface in a linear conformation.In other conditions, the impact of polyelectrolyte molecular weight on growth and properties of PEM has been explained by the packing of chain molecules at the film surface (pH = 5.0 and pH = 8.0 with NaCl) or by film erosion that was noticed during PEM build up (pH = 10.0). Polyelectrolyte ; Chemical engineering ; Chemistry ; Materials science ; Polymer ; Organic chemistry Polymer Surface Interaction Studies ; Dendrimers and Hyperbranched Polymers ; Tribology and Wear Analysis