jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Ningxu Han | Jianjun Ma | Hao Yu | Junjuan Shi | Manman Dai | Ziteng Guo | Zhenghong Gao | Houyu Zhang | Ming Wang
Source: Chemical Science (article, 2025-01-01)
Field: Chemistry — Inorganic Chemistry

Isomeric decker metallo-supramolecules with tunable luminescence and chiroptical properties The regulation of interchromophoric interactions in multichromophoric systems is crucial for developing high-performance photofunctional materials. In this study, we present a novel self-assembly strategy to construct isomeric decker complexes, denoted as S1 and S2, which integrate disparate chromophores, achiral BODIPY and chiral binaphthyl moieties. This isomerization results in distinct chromophore packing modes. In the case of S1, the BODIPY and binaphthyl moieties are arranged in a relatively loose manner (∼6.0 Å), enabling efficient FRET and preserving the strong locally excited (LE) emission (<i>Φ</i> <sub>F</sub> = 91.3%) characteristic of the BODIPY unit. In contrast, for S2, the denser packing between the BODIPY and binaphthyl moieties (∼4.8 Å) leads to through-space charge transfer (TSCT) and weak charge transfer (CT) emissions (<i>Φ</i> <sub>F</sub> = 8.6%). Notably, only complex (R)/(S)-S1 shows mirror-image circular dichroism (CD) signals based on chirality transfer and circularly polarized luminescence (CPL), as supported by TD-DFT calculations, which reveal that the binaphthyl moiety alters the angle between the electric transition dipole moment (μ) and the magnetic transition dipole moment (<i>m</i>). BODIPY ; Chromophore ; Luminescence ; Circular dichroism ; Magnetic dipole transition ; Excited state ; Moiety ; Transition dipole moment Metal-Organic Frameworks: Synthesis and Applications ; Polyoxometalates: Synthesis and Applications ; Nanocluster Synthesis and Applications
Authors: Anitha Bujji | Nutan Rasane | D. A. Padmavathi
Source: Oriental Journal Of Chemistry (article, 2025-06-25)
Field: Chemistry — Organic Chemistry

Synthesis of Novel Cholesteryl Carbamate Derivatives Nine novel cholesterol-derived carbamate derivatives, were synthesised by reacting cholesteryl chloroformate with various amines, including urea, acetamide, acrylamide, thiocarbazide, 4-methylthiosemicarbazide, aniline, p-methoxy benzylamine, 4-aminoquinaldine and piperidine. The derivatives contain diverse functional groups, such as carbamate linkages, sulphur-containing moieties, aromatic rings and aliphatic amines. The use of 4-dimethyl amino pyridine (DMAP) as a catalyst reduced the reaction time from 24 h to 12 h. The reactions proceeded under mild conditions, with yields varying based on the nature of the amine. Secondary aliphatic amines afforded the highest yields, followed by hydrazine-based carbamates. The synthesised compounds were characterised using NMR spectroscopy, mass spectrometry. These cholesteryl carbamates provide a versatile platform for further modifications and show potential applications in chemical sensing, biomaterials and drug delivery. Elsevier Biobase ; Material chemistry ; Chemistry ; Industrial chemistry ; GEOBASE ; Green chemistry ; Carbamate ; Food chemistry ; FLUIDEX ; Coordination complex ; Evisa ; Organic chemistry ; Theoretical chemistry ; Supramolecular chemistry ; Radiation chemistry ; Biochemical engineering ; Molecule ; Chemical reaction ; Metal Synthesis and Reactivity of Sulfur-Containing Compounds ; Phosphorus compounds and reactions ; Synthesis and Reactions of Organic Compounds
Authors: Xiao Tong Hon | K. C. Lim | Lik Nguong Lau | Mohd Mustafa Awang Kechik | Soo Kien Chen | Muhammad Kashfi Shabdin | Nurhidayah Mohd Hapipi | Najihah Rohiat | Abdul Halim Shaari
Source: Journal of Material Science and Radiation (article, 2025-12-27)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Influence of Sintering Temperatures on Pr0.7Ba0.3MnO3 Prepared Using Thermal Treatment Method In this work, Pr0.7Ba0.3MnO3 (PBMO) was synthesised using a thermal treatment method with sintering temperature ranging from 800 °C to 1100 °C. X-ray diffraction (XRD) confirmed the formation of pure PBMO phase at 1100 °C, while lower sintering temperatures led to the presence of secondary phase, particularly Pr(Mn2O5). Microstructural analysis revealed significant grain growth with rising sintering temperatures, accompanied by enhanced crystallinity and reduced secondary phases. Magnetic measurements indicated ferromagnetic behaviour at room temperature for all samples. However, the electrical resistivity demonstrates an unexpected increase with sintering temperature, attributed to the influence of secondary phase at lower sintering temperatures and grain growth in the pure PBMO phase at higher sintering temperatures. Additionally, microstructural defects such as oxygen non-stoichiometry or porosity might further contribute to the suppression of the metal-insulator transition temperature. Overall, this study highlights the significant role of sintering temperatures in controlling the phase purity, microstructure and physical behaviour of PBMO samples, offering valuable insights for their potential applications in spintronics or magnetic sensing devices. Sintering ; Microstructure ; Grain growth ; Grain size ; Electrical resistivity and conductivity ; Phase (matter) ; Ferromagnetism ; Crystallinity Magnetic and transport properties of perovskites and related materials ; Multiferroics and related materials ; Electrical and Thermal Properties of Materials
Authors: Xiaoran Qin | Zhiwei Fan | Zhenhua Xiao | Mengze Lu | Taolin Sun
Source: Journal of Applied Polymer Science (article, 2025-09-09)
Field: Chemistry — Organic Chemistry

Decoupling of Cohesive Fracture and Interfacial Detachment in Pressure‐Sensitive Adhesives Based on Amphiphilic Triblock Copolymers ABSTRACT This work systematically investigates the adhesion behavior of pressure‐sensitive adhesives (PSAs) by synthesizing an amphiphilic triblock copolymer, poly(benzyl acrylate)‐block‐poly(2‐hydroxyethyl acrylate)‐block‐poly(benzyl acrylate) (PBzA‐ b ‐PHEA‐ b ‐PBzA), featuring tunable terminal block lengths. The PSA design harnesses synergistic interactions between dynamic hydrogen bonding in the mid‐block and physical crosslinking at the end‐blocks. A four‐region stress–strain phase diagram was constructed based on distinct debonding modes, while curves correlating adhesive energy to debonding velocity were derived using the time–temperature superposition principle, which enabled the decoupling of bulk viscoelastic dissipation from interfacial adhesive energy contributions. The results revealed that increasing terminal block lengths enhances mechanical performance but reduces adhesive energy at fixed debonding velocities. A modified Lake‐Thomas model confirms consistent interfacial adhesive energy across the three systems. This study demonstrates how tuning structural parameters in block copolymer architectures governs adhesion properties, providing new insights for developing robust yet flexible PSA systems through molecular architecture optimization. Adhesive ; Copolymer ; Viscoelasticity ; Decoupling (probability) ; Dissipation ; Adhesion ; Amphiphile ; Phase diagram ; Phase (matter) Advanced Polymer Synthesis and Characterization ; Silicone and Siloxane Chemistry ; Polymer composites and self-healing
Authors: Muhammad Mudassar | Muhammad Rafique | Hafsa Mahmood | Muhammad Arslan | Tehreem Arshad | Ayesha Armani | Fakhar Siddiq | Maria Kanwal | Imran Shahadat | Fazila Javed
Source: Characterization and Application of Nanomaterials (article, 2025-06-03)
Field: Materials Science — Materials Chemistry

Growth of 2D hexagonal boron nitride nanosheets on Ag using atmospheric pressure plasma for enhanced hardness Two-dimensional hexagonal boron nitride nanosheets (h-BNNS) were synthesized on silver (Ag) substrates via a scalable, room-temperature atmospheric pressure plasma (APP) technique, employing borazine as a precursor. This approach overcomes the limitations of conventional chemical vapor deposition (CVD), which requires high temperatures (&gt;800 °C) and low pressures (10−2 Pa). The h-BNNS were characterized using FT-IR spectroscopy, confirming the presence of BN functional groups (805 cm−1 and 1632 cm−1), while FESEM/EDS revealed uniform nanosheet morphology with reduced particle size (80.66 nm at 20 min plasma exposure) and pore size (28.6 nm). XRD analysis demonstrated high crystallinity, with prominent h-BN (002) and h-BN (100) peaks, and Scherrer calculations indicated a crystallite size of ~15 nm. The coatings exhibited minimal disruption to UV-VIS reflectivity, maintaining Ag's optical properties. Crucially, Vickers hardness tests showed a 39% improvement (38.3 HV vs. 27.6 HV for pristine Ag) due to plasma-induced cross-linking and interfacial adhesion. This work establishes APP as a cost-effective, eco-friendly alternative for growing h-BNNS on temperature-sensitive substrates, with applications in optical mirrors, corrosion-resistant coatings, energy devices and gas sensing. Hexagonal boron nitride ; Materials science ; Hexagonal crystal system ; Atmospheric-pressure plasma ; Atmospheric pressure ; Plasma ; Boron ; Nitride ; Boron nitride ; Chemical engineering ; Metallurgy ; Nanotechnology ; Crystallography ; Graphene ; Chemistry ; Geography ; Meteorology ; Physics Graphene research and applications ; Diamond and Carbon-based Materials Research ; Boron and Carbon Nanomaterials Research
Authors: Iraj Saberikia | Elham Safaei | Fariborz Mansouri | Babak Karimi
Source: Scientific Reports (article, 2025-12-23)
Field: Chemistry — Inorganic Chemistry

A versatile bioinspired iron-based catalyst for the C–H bond and alcohol oxidations In this study, we developed a highly efficient and versatile non-heme iron complex containing a proline-based mono(phenol)amine ligand (L<sup>Pro</sup>), which was successfully immobilized within the nanospaces of SBA-15, creating a reusable biomimetic catalyst inspired by Cytochrome P450. The synthesized compounds were thoroughly characterized using a range of physicochemical techniques, including TEM, XPS, FT-IR, N<sub>2</sub> adsorption-desorption, TGA, ICP, SEM-EDX, and CHN analysis. The bio-inspired iron catalyst was evaluated for its effectiveness in oxidizing C-H bonds and converting alcohols into high-value compounds through environmentally benign procedures. Notably, the catalyst exhibited remarkable efficacy and selectivity in the oxidation of various benzylic substrates under mild conditions, utilizing a TBHP/O<sub>2</sub> oxidant system to yield ketones or carboxylic acids. Furthermore, the catalyst demonstrated exceptional activity in the direct oxidation of alcohols to carboxylic acids under ambient conditions. Importantly, the catalyst could be easily recovered from the reaction mixture and retained nearly all of its initial activity and structural integrity even after four consecutive cycles of reuse. Oxidizing agent ; Catalysis ; Alcohol oxidation ; Alcohol ; Yield (engineering) ; Selectivity ; Ligand (biochemistry) Metal-Catalyzed Oxygenation Mechanisms ; Asymmetric Hydrogenation and Catalysis ; Catalytic C–H Functionalization Methods
Authors: Rysgul N. Tuleyeva | Nargiz N. Gizatullina | Ronagul Turganova | Ayaz M. Belkozhayev | Gaukhar Toleutay
Source: Bulletin of Shakarim University Technical Sciences (article, 2025-11-03)
Field: Materials Science — Biomaterials

POLYSACCHARIDE-BASED BIOPLASTICS FOR SUSTAINABLE PACKAGING: ROLE OF NONCOVALENT INTERACTIONS AND TRANSESTERIFICATION The growing accumulation of plastic waste in ecosystems has catalyzed a global search for environmentally responsible packaging materials. Among biodegradable polymers, bioplastics derived from polysaccharides – especially from plant-based cellulose and its microbial analogue, bacterial cellulose (BC) – have attracted significant interest due to their renewability, biodegradability, and desirable mechanical attributes. Nevertheless, their practical application is frequently constrained by challenges such as hydrophilicity and vulnerability to environmental stressors. To overcome these issues, recent studies have explored structural modifications involving both noncovalent interactions (e.g., hydrogen bonding, ionic crosslinking) and covalent strategies such as transesterification. These approaches have been shown to improve mechanical integrity, flexibility and water resistance. This review discusses recent progress in engineering polysaccharide-based bioplastics, with a particular emphasis on how combined physical and chemical modifications can enhance performance. Special attention is given to hybrid systems incorporating BC, laponite, chitosan, and fatty acid esters, which demonstrate promising synergistic effects. Overall, the integration of noncovalent and covalent modifications offers a compelling strategy for developing next-generation sustainable packaging materials. Bioplastic ; Non-covalent interactions ; Flexibility (engineering) ; Cellulose ; Bacterial cellulose ; Covalent bond Nanocomposite Films for Food Packaging ; Advanced Cellulose Research Studies ; biodegradable polymer synthesis and properties
Authors: Ziyu Zhao
Source: Academic Journal of Science and Technology (article, 2025-12-28)
Field: Materials Science — Materials Chemistry

Next-Generation Organic Photodetectors: Hybrid Architectures and Applications Organic photodetectors (OPDs) have attracted significant attention due to their flexibility, broadband sensitivity, and potential for integration with wearable electronics and 6G communications. Notably, their low-cost fabrication via solution processing further enhances their competitiveness compared to traditional inorganic photodetectors. This work reviews recent progress in OPDs and hybrid architectures including tandem perovskite, 2D perovskite, TMD (transition metal dichalcogenides), quantum-dot, graphene-plasmonic, and black phosphorus heterojunctions. The mechanisms of photon-to-current conversion, interfacial charge transport, and hybrid material integration mechanisms are discussed in detail. Research demonstrates that by tailoring dimensionality, energy alignment, and interfacial chemistry, the long-standing trade-off between speed, noise, and stability can be mitigated. These advances address critical issues such as high dark current, poor stability, and limited reproducibility, thus paving the way for the use of OPDs in healthcare monitoring, environmental sensing, and optical communication. The review highlights both achievements and challenges, emphasizing the need for scalable, defect-free fabrication and environmentally safe materials. Black phosphorus ; Broadband ; Photodetector ; Fabrication ; Environmentally friendly ; Electronics ; Tandem 2D Materials and Applications ; Perovskite Materials and Applications ; Organic Electronics and Photovoltaics
Authors: A. Maroto-Valiente | Carla A. Blanco-Camus | Ana I. Mártir Bueno | Elena M. Mesa-Bribián | J. Álvarez-Rodríguez
Source: C – Journal of Carbon Research (article, 2025-09-30)
Field: Materials Science — Materials Chemistry

Study of the Iodine Fixation over High Surface Area Graphite (HSAG-100) Under Mild Conditions The controlled incorporation of halogens into carbon materials remains a challenge, particularly under mild and scalable conditions. In this work, we investigate the fixation of iodine on high-surface-area graphite (HSAG-100) using green solvents and moderate temperatures. Commercial HSAG was treated with iodine in aqueous and in organic media, with and without promoters, and characterized by XPS, LEIS, N2 physisorption, TGA/TPD, and XRD. The results reveal that iodine contents up to ~0.6 at% can be achieved, with incorporation strongly influenced by solvent and reaction time. XPS and LEIS confirmed the presence of C–I bonds, while BET analysis showed only moderate decreases in surface area and unchanged mesopore size distribution. Thermogravimetric and TPD analyses demonstrated the high thermal stability of C–I species, and XRD patterns ruled out intercalation between graphene layers. Collectively, these findings demonstrate that iodine can be covalently anchored to HSAG under mild conditions, preserving the graphitic structure and generating stable edge functionalities, thus opening a route for the design of halogen-doped carbons for catalytic and electrochemical applications. Iodine ; Thermogravimetric analysis ; Graphite ; Thermal stability ; Aqueous solution ; X-ray photoelectron spectroscopy ; Specific surface area ; Graphene ; Catalysis Nuclear materials and radiation effects ; Radioactive element chemistry and processing ; Nuclear Materials and Properties
Source: International Research Journal of Modernization in Engineering Technology and Science (article, 2025-08-26)
Field: Chemistry — Organic Chemistry

Oxalic Acid-Catalyzed Solvent-Free One-Pot Multicomponent Synthesis of 1,3-Thiazolidin-4-ones An efficient and environmentally benign protocol for the synthesis of 1,3-thiazolidin-4-ones has been developed employing oxalic acid as a catalyst under solvent-free conditions.The transformation proceeds via a one-pot, multicomponent condensation of an aromatic aldehyde, an aromatic or heteroaromatic amine, and thioglycolic acid at ambient temperature under grinding for 2-3 h, affording the desired 1,3-thiazolidin-4-ones in moderate to good yields.Compared to conventional methodologies, this approach represents a greener alternative, characterized by operational simplicity, reduced environmental footprint, energy efficiency, economic viability, mild reaction conditions, shortened reaction times, and a concise synthetic route. Oxalic acid ; Catalysis ; Chemistry ; Solvent ; Organic chemistry ; Combinatorial chemistry Sulfur-Based Synthesis Techniques ; Multicomponent Synthesis of Heterocycles ; Synthesis of heterocyclic compounds
Authors: Djazia Bendeddouche | Lamia Bedjaoui | Aida Jover | Mohammed Aymen Zehouani | Amina Bouriche | Anne‐Sophie Schuller | Christelle Delaite | Ulrich Maschke
Source: Journal of Applied Polymer Science (article, 2025-11-24)
Field: Chemistry — Organic Chemistry

From Rigid to Elastic: Tailoring the Properties of Linear Poly( <scp>IBOA</scp> ‐co‐ <scp>2EHA</scp> ) Copolymers Synthesized by <scp>UV</scp> Polymerization ABSTRACT This study systematically investigated poly(isobornyl acrylate (IBOA)‐co‐2‐ethylhexyl acrylate (2‐EHA)) linear random copolymers synthesized via free radical photopolymerization to develop polyacrylate materials with tunable mechanical properties. A series of homopolymers and five copolymer compositions with varying IBOA content were prepared to study the relationship between structure and properties, as well as their correlation with mechanical behavior. The resulting linear polyacrylates were analyzed using multiple techniques. Structural characterization by 1 H NMR and MALDI‐TOF MS provided detailed information on the chemical environment, molar mass, monomer conversion rate, comonomer sequence distribution within the copolymer backbone, and end‐group analysis. Size exclusion chromatography revealed molar mass distributions ranging from 10 5 to 10 6 g/mol. DSC analysis revealed composition‐dependent glass transition temperatures and no crystalline melting transitions, confirming the amorphous nature of all copolymers. Tensile testing at room temperature revealed distinct mechanical properties: Poly(IBOA) (PIBOA) exhibited brittle, rigid characteristics, and Poly(2‐EHA) (PEHA) displayed flexible, elastic properties. These copolymers demonstrate tunable mechanical properties as a function of comonomer composition, combining the structural rigidity of PIBOA with the flexibility of PEHA. This compositional control over mechanical behavior makes these copolymers promising candidates for applications including biomedical devices, protective coatings, adhesives, and flexible electronics, where tailored mechanical properties are essential. Comonomer ; Copolymer ; Acrylate ; Glass transition ; Molar mass ; Monomer ; Radical polymerization ; Polymerization Advanced Polymer Synthesis and Characterization ; Polymer composites and self-healing ; Photopolymerization techniques and applications
Authors: Juho Toivola | Ankita V. Naik | Manu Lahtinen | Oriol Gonzàlez-Prats | Andrea Perez Prieto | Itziar Oyarzabal | Aaron Mailman
Source: Inorganic Chemistry Frontiers (article, 2025-01-01)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Thermally responsive magnetic bistability through solid–liquid phase transitions in alkylthio-functionalized dithiadiazolyl radicals This work demonstrates that a series of diamagnetic dimers undergo a thermally driven transition to form a paramagnetic radical liquid. Notably, one compound exhibits polymorphism, where this behavior is conserved across all isolated polymorphs. Diamagnetism ; Paramagnetism ; Radical ; Phase transition ; Bistability ; Phase (matter) Magnetism in coordination complexes ; Liquid Crystal Research Advancements ; Lanthanide and Transition Metal Complexes
Authors: O. J. Onyemachi | I. S. Okafor
Source: Nigerian Journal of Technology (article, 2025-09-30)
Field: Materials Science — Materials Chemistry

Development of the reaction conditions of a Suzuki-Miyaura cross coupling reaction catalysed by Ag-Pd Alloy Nanoparticle photocatalyst To increase product yield, percentage conversion, and catalyst recovery ease, the reaction parameters required for a successful Suzuki Miyaura cross-coupling process were optimized. To form new carbon-carbon bonds, 3- Indotoluene and Phenylboronic acid were cross-coupled using synthesized Ag-Pd Alloy Nanoparticle photocatalysts. Reaction conditions namely reaction base, solvent, wavelength, light intensity and reaction atmosphere were individually optimized by comparative analysis to find out the best set of parameters that will result in a cross-coupling product with high yield and high percentage conversion. Mix solvent of Dimethylformamide and water in the ratio of 3:1 was determined as the best solvent for the cross-coupling carried out in this research as a percentage conversion of 96% was achieved. Potassium carbonate (K2CO3) was the reaction base that gave better reaction yield and percentage conversion than the other bases that were tested in this research, also Argon as the reaction atmosphere gave better results than another reaction environment, while light intensity and light sources with shorter wavelength (less than 500nm) are favorable as the gave better percentage conversion, due to their ability in activating the Alloy Nano-particle Photo-catalysts that was used in this research. Findings from this research work suggest that for an effective and efficient Suzuki-Miyaura cross-coupling reaction, K2CO3, Dimethylformamide and water in the ratio of 3:1, argon, and a light source with high intensity and shorter wavelength are the appropriate reaction conditions. Yield (engineering) ; Catalysis ; Photocatalysis ; Solvent ; Potassium carbonate ; Dimethylformamide ; Coupling reaction ; Nanoparticle Quantum Dots Synthesis And Properties ; Advanced Photocatalysis Techniques ; Catalytic Processes in Materials Science