jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Adeniji Moshood Oluwaseyi | J. I. Iheanyichukwu | O. M. Mac-kalunta | Chinedum Ifeanyi Nwankwo | Comfort M. Ngwu | Joy Nwachukwu Eghucha | Nwokoma Esomchi Uzoma | I. E. Otuokere
Source: NIPES Journal of Science and Technology Research (article, 2026-03-25)
Field: Chemistry — Inorganic Chemistry

Synthesis and Biological Studies of Mixed ligand Complexes: A Review Mixed ligand complexes (MXLCs) have received significant academic interest in the field of coordination chemistry due to their structural diversity, unique physicochemical properties, and wide-ranging industrial and therapeutic applications. This review explains their synthetic pathways, as defined by analytical methods of FT-IR, ¹H and ¹³C NMR, UV-Vis spectroscopy, and single crystal X-ray diffraction, and simultaneously attributes their prominent biological functions, which include antimicrobial, anticancer, antioxidant, antidiabetic, and anti-inflammatory. Significant synthetic approaches are described: direct mixing, template-directed assembly, sequential addition and ligand substitution are examined critically. This increased bioactivity of M-XLCs could be explained by the ligand-induced chelation effects, which make the complex more lipophilic and promote its interactions with cellular targets and thus outperform the activity of traditional complexes and free ligands. This flexibility makes M-XLCs powerful scaffolds to generate superior therapeutic and industrial catalysts. In this light, future studies must focus on the clarification of the thermodynamic principles that govern these complexes, thus making coordination systems to be designed and optimized rationally. Flexibility (engineering) ; Ligand (biochemistry) ; Coordination complex ; Chelation ; Substitution (logic) ; Field (mathematics) Metal-Organic Frameworks: Synthesis and Applications ; Metal complexes synthesis and properties ; Crystal structures of chemical compounds
Authors: Lawal G. Anand | Muhammad Abubakar
Source:  (article, 2026-02-23)
Field: Materials Science — Materials Chemistry

The Morphology-Controlled Fabrication of Lanthanum-Based Nanostructures for Advanced Catalytic Applications The morphology of nanostructures plays a pivotal role in determining catalytic efficiency, surface reactivity, and material stability. Lanthanum-based nanomaterials, including oxides and rare-earth-derived composites, offer exceptional physicochemical properties such as high oxygen mobility, tunable electronic structures, and thermal stability. This study explores the controlled synthesis of lanthanum nanostructures using solution-assisted and thermal methods, highlighting how reaction parameters—precursor concentration, pH, temperature, and calcination conditions—influence shape, crystallinity, and surface area. Resulting morphologies, including nanorods, nanosheets, and hierarchical porous architectures, were achieved systematically. Structural analyses confirmed phase purity and uniform particle distribution, while surface characterization revealed enhanced active-site exposure in anisotropic forms. Catalytic evaluation in representative redox and environmental reactions showed that morphology-driven surface engineering significantly enhances reaction kinetics and long-term stability. Nanorod and porous structures exhibited superior performance due to improved charge transport and higher accessible surface areas. These results underscore the importance of morphology control in designing high-performance lanthanum nanocatalysts and provide a scalable framework for establishing structure–property–performance correlations relevant to environmental and energy applications. Nanomaterial-based catalyst ; Nanorod ; Catalysis ; Calcination ; Nanostructure ; Fabrication ; Porosity ; Nanoparticle ; Perovskite (structure) Catalytic Processes in Materials Science ; Electrocatalysts for Energy Conversion ; TiO2 Photocatalysis and Solar Cells
Authors: Maria‐Gabriela Alexandru | Diana Visinescu | Sergiu Shova | Fernando Nicolás Moliner | Mario Pacheco | Miguel Julve | Francesc Batlle i Lloret
Source: Inorganic Chemistry Frontiers (article, 2026-01-01)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Cyano-bridged {Ln <sub>2</sub> <sup>III</sup> Fe <sub>2</sub> <sup>III</sup> } molecular squares (Ln = Gd, Tb, Dy, Ho, and Er): tuning the slow magnetic relaxation and magnetocaloric effects in zero-dimensional lanthanide Prussian blue analogues Square-like cyano-bridged {Ln 2 III Fe 2 III } field induced SMMs and magnetic coolers operating just above the helium liquefaction temperature have been reported. Magnetic refrigeration ; Prussian blue ; Magnetic relaxation ; Lanthanide ; Magnetic field ; Relaxation (psychology) ; Magnetic hysteresis Magnetism in coordination complexes ; Lanthanide and Transition Metal Complexes ; Organic and Molecular Conductors Research
Authors: Bo M. Couture | Elanor C Goldsmith | Jordi Soler | Shreya Sharma | Hande Abeş | Andy A Tran | Marc Garcia-Borràs | Rudi Fasan
Source: ChemRxiv (article, 2026-03-18)
Field: Chemistry — Organic Chemistry

Site-Selective and Stereoselective C(sp 3 )−H Pyridomethylation and Pyrimidomethylation of N-Heterocycles Catalytic methods for the direct functionalization of aliphatic C-H bonds are highly valuable and sought-after tools for the construction of organic molecules and the late-stage elaboration of bioactive compounds and drugs. 1-3 Despite notable progress in the area of chemical and biological catalysis, 1-5 strategies for the undirected, asymmetric functionalization of aliphatic C-H bonds to form new carbon-carbon bonds remain limited. Herein, we report the development of a biocatalytic strategy for the asymmetric C(sp 3)-H functionalization of saturated Nheterocycles with high efficiency and enantioselectivity (up to 99% ee and 7,600 TON) via activation of 1,2,3-pyridotriazoles with engineered CYP119 catalysts. This system enables the direct installation of a methylpyridine substituent into an aliphatic C-H site of a variety of Nheterocyclic scaffolds, including tetrahydroquinolines, pyrrolidines, and others, offering direct access to optically active compounds that incorporate 'privileged' motifs widely used in medicinal chemistry and drug discovery. Adding to its synthetic utility, this methodology could be extended to stereoselective C(sp 3)-H pyrimidomethylation and applied to the late-stage C(sp 3)-H functionalization of drug-like polycyclic compounds and marketed drugs. Computational studies provide insights into the reaction mechanism and the molecular basis of protein-controlled stereoselectivity. This work expands the biocatalytic toolbox for asymmetric and late-stage C(sp 3)-H functionalization and it underscores the value of biocatalysis toward making available important chemical transformations neither found in nature, nor currently accessible via chemocatalysis. Surface modification ; Biocatalysis ; Substituent ; Enantioselective synthesis ; Stereoselectivity ; Molecule ; Organic synthesis ; Chemical synthesis Cyclopropane Reaction Mechanisms ; Catalytic C–H Functionalization Methods ; Synthesis and Catalytic Reactions
Authors: Maksymilian Solka | Michał Terlecki | Iwona Justyniak | Wanda Ziemkowska | Daniel Prochowicz | Janusz Lewiński
Source: Dalton Transactions (article, 2026-01-01)
Field: Chemistry — Inorganic Chemistry

Structural diversity of dimethylgallium naphthalene-2,3-dicarboxylate/pyridine systems Group 13 organometallic complexes are versatile building blocks of supramolecular architectures, offering wide structural and functional diversity. While organoaluminum systems have been extensively explored as nodes or chiral metalloligands in... Supramolecular chemistry ; Diversity (politics) ; Functional diversity ; Design elements and principles Synthesis and characterization of novel inorganic/organometallic compounds ; Crystallography and molecular interactions ; Synthesis and Properties of Aromatic Compounds
Authors: Yu Huang | Yong Li | Xiaogang Yin | Qiudi Zhu | He Mei | Xueqin Chang | Xi Liu | Wu Li | Aiwen Lei | Xianglin Pei
Source: Nature Communications (article, 2026-03-05)
Field: Chemistry — Inorganic Chemistry

Bio-inspired asymmetric Zn-N2O2 single-atom catalysts via natural skeleton for efficient N-alkylation of nitroarenes with alcohols Although significant developments are made in non-noble metal catalysts for N-alkylation of nitroarenes with alcohols via borrowing hydrogen strategy, obtaining catalysts with superior activity, reusability and broad substrate scope under mild reaction conditions remains challenging. Single-atom catalysts (SACs) hold unique coordination/electron structures, to be the potential candidates for this reaction. In this study, we firstly and creatively fabricate bio-inspired Zn SACs with asymmetric Zn-N<sub>2</sub>O<sub>2</sub> sites by utilizing the natural skeleton of biomass chitosan (denoted as Zn/CS), and achieve the first instance of heterogeneous Zn SACs in borrowing hydrogen reaction between nitroarenes and alcohols. The results reveal that the asymmetric Zn-N<sub>2</sub>O<sub>2</sub> sites induced by natural skeleton (like ligands) and nanoporous structure of Zn/CS significantly promote the N-alkylation efficiency of nitroarenes with alcohols. Notably, the Zn/CS exhibits the highest turnover frequency (TOF) among the reported heterogeneous catalysts, as well as wide substrate scope (56 examples) and excellent reusability. Furthermore, the catalytic pathway/mechanism is investigated by combing theoretical calculations, which reveals that the asymmetric Zn-N<sub>2</sub>O<sub>2</sub> sites with electron-deficient character can facilitate the formation of Zn-H and Zn-O bonds between Zn/CS and Ph-CH<sub>2</sub>O<sup>-</sup>, thus easily generating the transition state Ph-CH<sub>2</sub>O* and driving the whole reaction. Catalysis ; Substrate (aquarium) ; Nanoporous ; Reaction conditions ; Scope (computer science) ; Reusability ; Hydrogen Asymmetric Hydrogenation and Catalysis ; Nanomaterials for catalytic reactions ; Electrocatalysts for Energy Conversion
Authors: Deep Samanta | John A. Koithan | Anastasia Muliana | Matt Pharr
Source: Research Square (preprint, 2026-02-03)
Field: Materials Science — Biomaterials

Effects of mechano-hydrolysis on PLGA composition and its degradation products Hydrolysis ; Autocatalysis ; Degradation (telecommunications) ; Carboxylate ; Fourier transform infrared spectroscopy ; PLGA ; Polymer ; Infrared spectroscopy ; Decomposition biodegradable polymer synthesis and properties ; Bone Tissue Engineering Materials ; Graphene and Nanomaterials Applications
Authors: Laura Martellosio | Martina Ferri | Luca Lenzi | Arianna Tauro | Andrea Dorigato | Micaela Degli Esposti | Davide Morselli | Paola Fabbri
Source: ACS Polymers Au (article, 2026-01-27)
Field: Materials Science — Polymers and Plastics

Tailored Plasticization of Bio- and Fossil-Based Polymers Using a Versatile Bioplasticizer Derived from Phenylacetic Acid and Glycerol For accelerating the shift from fossil-derived plastics toward biopolymers, there is an urgent need to develop efficient and versatile biobased plasticizers to improve biopolymer performance without compromising biodegradability and/or safety. This study explores the versatility of the emerging triphenylacetic glyceroate (TPAG) bioplasticizer by incorporating it into a range of biobased and conventional polymers. An increasing content of TPAG, from 5 to 20 parts per hundred of resin (phr), has been compounded with polyhydroxybutyrate (PHB), polyhydroxybutyrate-<i>co</i>-valerate (PHBV), polyvinyl chloride (PVC), and polybutylene succinate (PBS), which present complicated processability and/or limited mechanical properties as bare polymers. Differential scanning calorimetry reveals a clear reduction in glass-transition temperatures (<i>T</i> <sub>g</sub>) for PHB, PHBV, and PVC, with the most significant drop observed for PVC (Δ<i>T</i> <sub>g</sub> = -25 °C at 20 phr TPAG), confirming the significant plasticizing efficiency of TPAG. A melting temperature decrease is also noted for PHB and PBS, with PHB exhibiting β-crystalline phase formation at high TPAG contents, which is attributed to enhanced chain mobility. Mechanical tests demonstrate that only 10 phr TPAG reduces Young's modulus across all polymers, importantly enhancing their flexibility. Furthermore, 20 phr of TPAG increases the elongation at break of PVC and PHBV up to 349% and 22%, respectively. Volatility and migration studies demonstrate minimal plasticizer loss with values remaining well below safety limits. Moreover, TPAG addition also tailors both water contact angle and UV-blocking activity of the tested polymers, clearly indicating the versatility and multifunctionality of TPAG as a potentially suitable additive for consumer-facing applications. Plasticizer ; Biopolymer ; Differential scanning calorimetry ; Polyhydroxybutyrate ; Biodegradation ; Polymer ; Polyvinyl chloride ; Glycerol ; Vinyl chloride Polymer Science and PVC ; biodegradable polymer synthesis and properties ; Polymer composites and self-healing
Authors: Pranita Rananaware | Mahesh Narayan | V. Brahmkhatri
Source: Drug Design Development and Therapy (article, 2026-02-01)
Field: Materials Science — Biomaterials

Drug Polymer Nanoparticles: An Advancement in Biomedical Solutions and Targeted Drug Delivery Polymer nanoparticles (PNPs) are compact particulate systems typically ranging from 10 to 1000 nm in size and have emerged as versatile platforms in modern biomedical research. Their growing importance stems from a unique combination of physicochemical properties, including tunable size, surface functionality, high drug loading capacity, and favourable biocompatibility. These features enable PNPs to act as efficient matrix carriers capable of encapsulating, protecting, and co-delivering a wide variety of therapeutic agents, including small molecules, proteins, and nucleic acids, within a single targeted delivery system. One of the key advantages of PNPs lies in their ability to improve both pharmacokinetic and pharmacodynamic profiles of drugs. By controlling drug release, enhancing solubility of poorly water soluble compounds, and reducing premature degradation or clearance, PNP-based systems can increase therapeutic efficacy while minimizing systemic toxicity. Targeting ligands can be incorporated on the nanoparticle surface to promote site-specific drug delivery, further improving treatment outcomes. A range of preparation techniques has been developed for the fabrication of advanced PNPs. These methods are generally classified according to the underlying particle formation mechanism, including polymerization-based approaches that generate nanoparticles directly and techniques that utilize preformed polymers. Advances in nanotechnology and polymer chemistry have enabled precise control over nanoparticle composition, morphology, and surface characteristics, leading to the development of sophisticated colloidal drug delivery systems. The integration of diverse nanomaterials into PNP formulations has further expanded their functional scope, significantly influencing the pharmacological and biopharmaceutical behavior of encapsulated drugs. Owing to their biocompatibility and design flexibility, PNPs have found broad applications in the treatment of cancer, neurodegenerative diseases, central nervous system disorders, and other complex medical conditions. This review elaborates on these aspects, highlighting the potential of PNPs as adaptable and powerful tools in next-generation therapeutic strategies. Biopharmaceutical ; Drug delivery ; Nanoparticle ; Drug ; Biocompatibility ; Targeted drug delivery ; Drug carrier ; Nanomaterials Nanoparticle-Based Drug Delivery ; Advanced Drug Delivery Systems ; Cancer Research and Treatment
Authors: Arpan Paikar | Phong Thai | Matthew T. Figgins | Bodhisattwa Mandal | Matthew J Lekas | Joseph H. Reibenspies | Gerard P Van Trieste | David C. Powers
Source: ChemRxiv (article, 2026-02-09)
Field: Chemistry — Organic Chemistry

A Hydrazoic Acid Adduct of Rh 2 : Synthesis, Characterization, and Imidogen-Transfer Photochemistry Metal-imidogen (i.e., M-NH) are proposed to mediate bond cleavage and construction in an emerging family of metal-catalyzed NH-transfer reactions. Transition metal complexes of hydrazoic acid (HN3) could serve as precursors to these transient intermediates; however, the coordination chemistry of HN3 is essentially unknown. Here, we report the synthesis and characterization of Rh2(esp)2(HN3)2, the first crystalline transition metal complex of HN3 (esp = α,α,α′,α′-tetramethyl-1,3-benzenedipropionate). Temperature-dependent multi-nuclear NMR, UV-vis, and IR spectroscopies demonstrate that HN3 is a weakly coordinating ligand (Keq = 1100 ± 100 M-2 at 243 K). Photolysis of Rh2(esp)2(HN3)2 in the presence of olefinic substrates results in stereospecific imidogen transfer to afford N-H aziridines. Cryogenic photolysis (77 K) enabled observation of a non-steady state intermediate, which we assign to be a triplet Rh2-NH complex. The nitrene photochemistry of Rh2(esp)2(HN3)2 was corroborated by in crystallo synthesis and cryogenic spectroscopic characterization of a family of N-aryl nitrene complexes. Together, these results establish the coordination chemistry of HN3, confirm the triplet ground state of the Rh2-NH intermediate responsible for catalytic NH transfer, and demonstrate a photochemical platform to study NH-transfer catalysis. Hydrazoic acid ; Nitrene ; Photodissociation ; Adduct ; Transition metal ; Bond cleavage ; Catalysis ; Coordination complex Synthesis and Catalytic Reactions ; Inorganic Chemistry and Materials ; Catalytic C–H Functionalization Methods
Source: BSU- Journal of Chemistry and Material Sciences (article, 2026-04-13)
Field: Materials Science — Materials Chemistry

OPTICAL CHARACTERIZATION OF ZnS NANOPARTICLES PREPARED BY THE SILAR METHOD USING POLYMER-DERIVED BIOCHAR ADDITIVES Zinc sulfide (ZnS) is a wide band gap II-VI semiconductor with significant potential for optoelectronic and ultraviolet (UV) sensing applications.In this study, ZnS nanoparticles were synthesized via the Successive Ionic Layer Adsorption and Reaction (SILAR) method using a polymer-derived biochar additive obtained from agricultural waste.The environmentally friendly synthesis route enables controlled nucleation and growth of ZnS nanoparticles through repeated SILAR cycles.Optical properties were investigated by UV-Vis spectroscopy in the wavelength range of 200-900 nm.The absorption spectra reveal strong absorption in the UV region and high transparency in the visible range, indicating the formation of nanoscale ZnS.The optical band gap was estimated from the absorption edge in the UV-Vis spectra, was found to be in the range of 3.7-3.9eV, which is larger than that of bulk ZnS due to quantum confinement effects.The results demonstrate that biochar plays a key role in improving particle homogeneity and optical performance.The synthesized ZnS nanoparticles show strong potential for application in UV photodetectors, optoelectronic devices and sustainable functional coatings. Band gap ; Nanoparticle ; Biochar ; Zinc sulfide ; Absorption edge ; Photoluminescence ; Absorption spectroscopy ; Adsorption ; Absorption (acoustics) ; Ultraviolet Quantum Dots Synthesis And Properties ; Polymer Nanocomposite Synthesis and Irradiation ; Carbon and Quantum Dots Applications
Authors: Pengpeng Li | Jiahao Zhang | Yike Jin | Zifan Xu | Guohua Sun
Source: Advanced Functional Materials (article, 2026-02-15)
Field: Chemistry — Organic Chemistry

Spontaneous Symmetry Breaking to Amplified Chirality: Biomimetic Helical Nanofibers for High‐Performance Circularly Polarized Luminescence ABSTRACT Helical micro‐nanomaterials with intelligently controllable, multi‐color circularly polarized luminescence (CPL) have garnered significant interest for their promising applications in chiral chemistry, photonics, and electronics. However, the precise and convenient fabrication of multi‐color and white CPL‐active flexible nanofibers featuring continuous helical topological structures remains challenging, particularly in the deformable solid nanomaterials. In this study, we employed a soft (polyurethane elastomer)/ hard (conjugated helical polymer/ cellulose/fluorescent dyes) bicomponent electrospinning strategy, through which helically chiral luminescent nanofibers with predominant single‐handedness were spontaneously formed due to intercomponent strain mismatch. By constructing hierarchical helices from the molecular to the mesoscopic scale, we achieved a biomimetic chiroptical flexible material that exhibits unique chirality amplifications. This work reveals a previously unreported synergistic strategy for the construction of mesoscopic chiral luminescent helical nanofibers. Furthermore, owing to the excellent flexibility and designability of electrospun nanofibers, as well as the unique physical and optical properties provided by chiral helical polymers and mesoscopic helical micro‐and nanofibers, the prepared multicolor and white CPL‐active nanofibrous films demonstrate promising application prospects in circularly polarized LED devices, blue‐light blocking films, and even as substitutes for flexible liquid crystal cells—highlighting the innovation and potential of this research system. Mesoscopic physics ; Luminescence ; Nanofiber ; Chirality (physics) ; Electrospinning ; Circular polarization ; Polymer ; Fabrication Synthesis and Properties of Aromatic Compounds ; Metamaterials and Metasurfaces Applications ; Liquid Crystal Research Advancements
Authors: Claudia Lacombe | Charlotte Leonhardt | Martin Humeník | Birgit Wiltschi | Thomas Scheibel
Source: Advanced Materials (article, 2026-02-05)
Field: Materials Science — Biomaterials

Directed Functionalization of Recombinant Spider Silk Nonwoven Membranes with Antibodies Using Non‐Canonical Amino Acids Natural spider silk fibers are recognized for their outstanding mechanical properties. The production of underlying recombinant spider silk proteins in scalable quantities unlocks their potential for technical and biomedical applications. The recombinant spider silk technology further enables the introduction of new functions via genetic encoding. In the present study, the non-canonical amino acid L-azidohomoalanine is incorporated into the engineered Araneus diadematus fibroin 4, eADF4(C16), at positions explicitly defined by methionine codons in an N-terminal peptide tag. The azido-functionalized eADF4(C16) is processed into particles, films, or electrospun into nanofibers. As functional entities, high molecular weight molecules, such as antibodies, are modified with bio-orthogonal groups suitable for strain-promoted cycloaddition to the exposed azido-groups on the spider silk supports. The antibody-activated spider silk nonwoven meshes exemplarily show their applicability as bio-capturing membranes. Spider silk ; Fibroin ; SILK ; Amino acid ; Recombinant DNA ; Spider ; Araneus Silk-based biomaterials and applications ; Surface Modification and Superhydrophobicity ; Dyeing and Modifying Textile Fibers
Authors: Matthias Schöbinger | Martin Huber | Sophia Mundigler | Berthold Stöger | M. Reissner | Peter Weinberger
Source: Inorganic Chemistry Frontiers (article, 2026-01-01)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Spin-Crossover Tuning in Synergistic Luminescent Fe(II) Coordination Compounds via Topochemical [4+4] Photocycloaddition of an Anthracene-Based Ligand Coordination polymers (CPs) designed to couple spin crossover (SCO) and photoluminescence (PL) properties hold significant potential for sensor applications, enabling optical readout of spin states. We report the synthesis of... Ligand (biochemistry) ; Photoluminescence ; Luminescence ; Coordination complex ; Coordination polymer ; Spin crossover ; Polymer Magnetism in coordination complexes ; Lanthanide and Transition Metal Complexes ; Organic Light-Emitting Diodes Research