jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Dr Rashmi Jindal | Shyam Sundar Yadav
Source: International Journal of Scientific Research in Chemistry (article, 2025-09-20)
Field: Chemistry — Organic Chemistry

Recent Advances in Nano-Catalysis: Implications for Green Chemistry Nano-catalysis represents one of the most promising advancements in the field of green chemistry, combining cutting-edge nanotechnology with catalytic processes to address sustainability challenges in various industries. As global concerns about climate change, energy consumption, and resource depletion continue to grow, the need for more efficient and depletion friendly chemical processes has never been more urgent. Nano-catalysts, due to their unique size, surface characteristics, and tunable properties, have demonstrated enhanced performance compared to traditional catalysts in numerous green chemistry applications. “This paper provides a comprehensive review of the latest advancements in nano-catalysis, with a focus on its applications in the reduction of CO2, hydrogen production via water splitting, and the conversion of biomass into biofuels. These applications are particularly significant in the context of achieving a circular carbon economy and transitioning to sustainable energy sources. Metal nanoparticles, carbon-based materials such as graphene, and hybrid nanomaterials have been identified as highly effective in promoting key reactions, offering a pathway for a more efficient and depletion conscious chemical industry. Despite the promising potential, several challenges remain in the large-scale application of nano-catalysts. These challenges include issues related to catalyst stability under harsh reaction conditions, catalyst deactivation, scalability, and the high cost of production. Additionally, concerns regarding the environmental impact and toxicity of nanoparticles need to be addressed to ensure the safety and sustainability of these technologies. This review will explore the recent literature on the design, synthesis, and applications of nano-catalysts, assess the state-of-the-art technologies, and offer a forward-looking perspective on the future of nano-catalysis in green chemistry. By synthesizing current findings and identifying gaps in research, this paper aims to highlight the critical role nano-catalysis will play in shaping the future of sustainable chemistry and the energy transition.,, Sustainability ; Context (archaeology) ; Resource depletion ; Green chemistry ; Resource (disambiguation) ; Green economy ; Sustainable development Nanomaterials for catalytic reactions ; Advanced Photocatalysis Techniques ; Chemistry and Chemical Engineering
Authors: Frederick J. F. Jacobs | Siyanda Khoza | Eleanor Fourie
Source: Inorganics (article, 2025-07-30)
Field: Chemistry — Organic Chemistry

Fluorene-Containing β-Diketonato Ligands and Their Rhodium(I) Complexes—A Characterization and Crystallographic Study The highly fluorescent fluorene group is of interest for its unique optical and electronic properties. By incorporating it into a metal complex, these properties are extended to the complex and are useful in a number of different applications. Four β-diketone ligands were synthesized containing the fluorene-functional group, where the varying substituent on the β-diketone was CF3 (1), PhCF3 (2), Ph (3) and PhCH3 (4). The corresponding cyclooctadiene rhodium(I) complexes of the type [Rh(cod)((fluorene)COCHCOR)], with R = CF3 (5), PhCF3 (6), Ph (7) and PhCH3 (8) were also synthesized. A crystal structure determination of 2 and 6 was performed, highlighting important changes in the ligand structure as a result of metal complexation. The structure of 2 also showed a hydrogen interaction between the hydroxy and carboxyl groups, forming a pseudo six-membered ring that stabilizes the enol form of the compound. Cyclic voltammetry (CV) of the β-diketones 1–4 showed a reduction wave for the reduction of the β-diketonato backbone between −1500 mV and −2100 mV as measured against ferrocene (FcH). CVs of rhodium(I) complexes 5–8 showed a reduction of the β-diketonato backbone between −1800 and −2000 mV, as well as an oxidation wave for the oxidation of the rhodium(I) metal centre at approximately 300 mV. Fluorene ; Rhodium ; Characterization (materials science) ; Crystallography ; Chemistry ; Materials science ; Nanotechnology ; Polymer ; Organic chemistry ; Catalysis Organometallic Complex Synthesis and Catalysis ; Fluorine in Organic Chemistry ; Metal complexes synthesis and properties
Authors: Hao Hu | qiangsheng zhang | Ziyan Wu | Hongtao Liu | Jialin Xie | Zhenchang Wen | Weijie Chi | Jianwei Li | Chunman Jia
Source: Communications Chemistry (article, 2025-12-26)
Field: Chemistry — Organic Chemistry

Synergistic 3D π–π networks enforce persistent foldamer configuration with tunable full-color circularly polarized luminescence Achieving molecular chirality with enantiostability in purely π-conjugated foldamers remains a substantial challenge due to inherently weak π-π stacking interactions and facile racemization. Herein, we introduce a novel design strategy employing synergistic intramolecular 3D π-π stacking networks within a 1,8-diarylnaphthalene framework, enabling foldamers to exhibit extraordinary configurational stability. A systematic series of quinoxaline- and phenazine-based foldamers incorporating carbazole (CZ) and diphenylamine (DPA) donors were synthesized, with chiral configurations stabilized through complementary face-to-face and laterally offset π-π stacking interactions. Single-crystal X-ray analyses and computational studies confirmed the formation of complex intramolecular π-networks, providing exceptional racemization barriers (ΔG<sup>‡</sup> up to 26.06 kcal mol<sup>-1</sup>), exceeding conventional atropisomers. Additionally, the modular donor-acceptor design facilitates full-color circularly polarized luminescence (469-684 nm), maintaining high dissymmetry factors (|g<sub>lum</sub> | > 10<sup>-3</sup>) across solution and solid-state environments. This work establishes a generalizable principle for constructing chiral foldamers with enantiostability and tunable optical properties through tailored 3D aromatic interactions, offering significant advances in chiral optoelectronics and responsive materials. Stacking ; Intramolecular force ; Luminescence ; Racemization ; Chirality (physics) ; Circular polarization ; Modular design Synthesis and Properties of Aromatic Compounds ; Supramolecular Chemistry and Complexes ; Chemical Synthesis and Analysis
Authors: Shankar Rajukannu | Ratchagaraja Dhairiyasamy | Ali Althobaiti | Sudheer Kumar Singh
Source: Digest Journal of Nanomaterials and Biostructures (article, 2025-07-15)
Field: Chemistry — Electrochemistry

Electrochemical synthesis and characterization of redox-tunable organometallic complexes via controlled potential electrolysis The development of clean and controllable synthesis methods for organometallic complexes is a key challenge in coordination chemistry, with significant implications for catalysis and materials science. Traditional synthetic routes often suffer from harsh conditions and limited redox control. To address this gap, this study investigates controlled potential electrolysis (CPE) as a green and selective method for synthesizing redox-active organometallic complexes. The objective was to evaluate the structural, thermal, and spectroscopic properties of Fe-bipyridine, Ru-triphenylphosphine, and Co-phenanthroline complexes prepared electrochemically. Using cyclic voltammetry, optimized redox potentials were applied for selective metal-ligand assembly. Characterization was performed via NMR, FTIR, UV-Vis, PXRD, TGA/DSC, and spectroelectrochemical techniques. The Fe– bipyridine complex showed high thermal stability (stable up to 245 °C), a 25 cm⁻¹ red shift in C=N stretching, and strong MLCT absorbance at 442 nm (ε = 8.2 × 10³ M⁻¹cm⁻¹). The Ru complex exhibited dual MLCT bands (at 420 and 498 nm) and a 34% higher absorptivity than Fe. Time-resolved UV-Vis confirmed redox interconversion, with &gt;130% increase in oxidized species at 520 nm. These results demonstrate that CPE provides precise control over redox state and achieves high product purity. This method offers a sustainable approach to complex design, and future research will focus on enhancing catalytic performance and exploring multi-metal systems. Electrochemistry ; Electrolysis ; Redox ; Characterization (materials science) ; Bulk electrolysis ; Chemistry ; Inorganic chemistry ; Nanotechnology ; Materials science ; Combinatorial chemistry ; Cyclic voltammetry ; Electrode ; Physical chemistry ; Electrolyte Electrochemical Analysis and Applications ; Conducting polymers and applications ; Ionic liquids properties and applications
Authors: Anitha Sudhir | Sowmya Palahally Thimmappa | Giridarshan Sangarashettihalli Krishnegowda | Sudhir Murthy | Bindya Shivananda | Lakshmi Sira | Syed Baker
Source: Environmental Quality Management (article, 2025-08-15)
Field: Chemistry — Analytical Chemistry

Study the Kinetics of Indigo Carmine Oxidation With Mechanistic Perspective ABSTRACT The present study addresses the major concerns surrounding the complexity of synthetic dyes, particularly focusing on the ubiquitous indigo carmine (IC), which has been linked to various health ailments and environmental hazards. Through a meticulous investigation into the kinetics of IC oxidation, employing diverse oxidizing agents, this research aims to highlight the underlying reaction mechanisms and rate expressions. Notably, the study presents 30 schematic representations to elucidate the mechanistic process of IC oxidation, contributing to a more comprehensive understanding of this critical transformation. With scanty reports available on comprehensive IC oxidation, the present study significantly adds to the existing scientific knowledge, offering insights that could potentially mitigate the hazardous risks associated with IC. The study not only advances scientific understanding but also proposes sustainable strategies for addressing the environmental and health challenges posed by IC. Indigo carmine ; Schematic ; Oxidizing agent ; Hazardous waste ; Process (computing) ; Computer science ; Biochemical engineering ; Business ; Chemistry ; Engineering ; Waste management Dye analysis and toxicity ; Free Radicals and Antioxidants ; Dyeing and Modifying Textile Fibers
Authors: Ao Wang | N. A. Johari | Abdul Hakim Md Yusop | MUHAMAD AZIZI BIN MAT YAJID | Wajid Ali
Source: Jurnal Mekanikal (article, 2025-11-17)
Field: Materials Science — Materials Chemistry

COMPREHENSIVE REVIEW OF NANOPOROUS ANODIC ALUMINA: SYNTHESIS STRATEGIES AND FUTURE PERSPECTIVES Nanoporous anodised aluminium (NAA) is a valuable substance characterised by a uniform pore structure, exceptional chemical stability, and robust mechanical qualities. It possesses extensive applicability in biology, energy, sensing, and optics. This research initially examines the historical development of NAA, elucidates the fundamental principles of its formation process, and elucidates the mechanism underlying its distinctive structure. This study systematically analyses the impact of key parameters—oxidation voltage, oxidation temperature, electrolyte type, and concentration—on the anodization process and their effects on the structural characteristics of NAA, including pore size, pore spacing, and oxide film thickness. The comparison of outcomes from various preparation circumstances elucidates the approach for optimising the procedure to get the desired structure. This research delineates the unique applications of NAA in the biomedical domain, encompassing drug carriers, tissue engineering, and antibacterial coatings, while also categorising its use in energy conversion and storage, including osmotic energy conversion and battery augmentation. The advanced developments of NAA in humidity, gas, and optical sensors are thoroughly examined, particularly their potential applications in the creation of photonic crystals, photocatalysis, and random laser platforms. This article anticipates the future trajectory of NAA, identifies its technical challenges and research priorities concerning large-scale preparation, precise structural control, and multifunctional applications, and offers a theoretical foundation and practical guidance for further investigation in this domain. Anodizing ; Nanoporous ; Anode ; Process (computing) ; Characterization (materials science) ; Battery (electricity) Anodic Oxide Films and Nanostructures ; Nanoporous metals and alloys ; Silicon Nanostructures and Photoluminescence
Authors: Safia DASSALLEM | Khalid Nouneh | Yanpeng Xue | Domenica Tonelli | Abdelhafed Taleb
Source: Sensors (article, 2025-12-22)
Field: Chemistry — Electrochemistry

A Review on Hierarchical Nanostructures for Electrochemical Sensors In recent years, researchers have significantly increased their exploration of nanomaterials, primarily due to their exceptional and distinctive electrochemical properties. Hierarchical nanostructured materials have become a prevalent component in electrochemical sensors owing to their numerous advantages, including abundant open diffusion channels, diverse junction interfaces, and a highly exposed surface area. This review provides a comprehensive overview of the potential of hierarchical nanomaterials as electrode modifiers, highlighting their capacity to enhance device performance. The introduction section sets the context by addressing the challenges and recent advancements in the field of hierarchical nanomaterials, emphasizing their promise for electrochemical sensor applications, and outlining the diverse research directions that are currently being explored. In the following section, a range of strategies and techniques for synthesizing hierarchical nanomaterials are outlined, with an emphasis on the impact of various parameters on their properties. Subsequently, the characteristics and performance of diverse hierarchical nanomaterials as electrode modifiers for electrochemical sensor applications are examined. Ultimately, the primary aspects and challenges of hierarchical nanomaterials in the domain of electroanalysis are reported, followed by a discussion of their future development. Nanomaterials ; Context (archaeology) ; Nanostructure ; Electrochemical gas sensor ; Characterization (materials science) ; Domain (mathematical analysis) Electrochemical Analysis and Applications ; Electrochemical sensors and biosensors ; Conducting polymers and applications
Authors: Xue Zhai | Hao Su | Yuxuan Tu | Fangxin Xu | Yueya Zhang | Zhentao Xie | И. А. Курзина | Biqing Bao | Lianhui Wang
Source: Advanced Healthcare Materials (article, 2025-11-30)
Field: Chemistry — Organic Chemistry

Self‐Reported 2D Metal–Organic Nanosheet Pre‐Catalyst for Bioorthogonally Anti‐Tumor Immunotherapy Transition metal-mediated bioorthogonal reactions face significant challenges, including limited catalytic stability in biological media, sensitivity to environmental conditions, high toxicity, and unpredictable reactions with the prodrugs. Herein, we present a self-reporting biopalladium pre-catalyst, which simultaneously generates catalytic activity through an in situ ligand exchange process in tumor tissue and a turn-on near-infrared fluorescence signal to indicate the optimal reaction time point with the prodrug. Ultrathin 2D metal-organic nanosheet (Pd-BDP) is crafted as a bioorthogonal pre-catalyst with good biocompatibility, which servesd as a reservoir of Pd(II) and avoids its rapid deactivation in living systems. Pd-BDP is activated by electron-poor tri(2-furyl) phosphine (TFP) to generate a Pd complex with a decaging yield of 63.3% under complex physiological conditions, and the process could be simultaneously visualized by NIR fluorescence signals from released BDP photosensitizer. Combination treatment of the immunotherapeutic agonist prodrug (R848) and PDT/PTT-induced ICD facilitates strong antitumor immunity and reduces systemic inflammation, leading to precise inhibition of primary tumor growth and lung metastasis in the mouse model. This study thus opens a new avenue for rational design of bioorthogonal pre-catalysts with a good balance between biocompatibility, stability, and catalytic activity, which underlines its potential to improve the safety and efficacy of synergistically bioorthogonal immunotherapy. Bioorthogonal chemistry ; Ligand (biochemistry) ; Rational design ; Prodrug ; Catalysis ; Fluorescence ; Immunotherapy Click Chemistry and Applications ; Nanoplatforms for cancer theranostics ; Photodynamic Therapy Research Studies
Authors: A. A. Ismatov | Cosmin Romanițan | Х. Б. Ашуров | M. M. Adilov | Aleksandr Rahimov
Source: Eurasian Physical Technical Journal (article, 2025-09-30)
Field: Materials Science — Materials Chemistry

ANNEALING-INDUCED MORPHOLOGICAL EVOLUTION OF IRON NANOCATALYSTS FOR CARBON NANOTUBE GROWTH The synthesis of iron nanocatalysts on silicon substrates via the Electron Beam Physical Vapor Deposition method has garnered significant attention due to its catalytic uses. The influence of annealing temperature (500°C, 550°C, and 600°C) on the structural and morphological characteristics of Fe nanocatalysts and their use in the growth of carbon nanotubes via Chemical Vapor Deposition is investigated in this study. Atomic Force Microscopy and Scanning Electron Microscopy measurements reveal that an increase in the annealing temperature reduces the average nanocluster size, and annealing at 600°C yields nanoclusters with an average size of approximately 30 nm; hence, they are more effective as catalysts. Raman spectroscopy proved that carbon nanotube growth was only observed on the 600°C-annealed substrate, and it exhibits a high ID/IG ratio (&lt;1), indicating high crystallinity and low defect concentration. The absence of Radial Breathing Mode peaks represents additional evidence that the synthesized carbon nanotubes are multi-walled. These findings indicate that nanocluster size and distribution must be controlled with high accuracy using Electron Beam Physical Vapor Deposition and thermal treatment in order to maximize Fe nanocatalysts for carbon nanotubes growth. Nanomaterial-based catalyst ; Nanoclusters ; Carbon nanotube ; Chemical vapor deposition ; Raman spectroscopy ; Annealing (glass) ; Scanning electron microscope Carbon Nanotubes in Composites ; Graphene research and applications ; Electrocatalysts for Energy Conversion
Authors: Makarand G. Joshi | Komal Sharma | Jaishri Jadham | Uma Shankar Sharma
Source: Discover Chemistry. (article, 2025-08-03)
Field: Materials Science — Polymers and Plastics

Cu-Ni-Pd nanoparticles encapsulated in poly propylene imine (PPI) dendrimer: a potential catalyst for Suzuki Miyaura C-C coupling reaction PPI encapsulated Cu-Ni-Pd nanoparticles synthesized by co-complexation method and characterized by XRD, SEM and EDX techniques. The PPI encapsulated Cu-Ni-Pd nanoparticles shows high catalytic efficiency in Suzuki-Miyaura carbon–carbon coupling reactions of aromatic iodides and chlorides with phenyl boronic acid. The highest catalytic activity was observed at EtOH/water ratio of 3:1 while using Na2CO3 as a base. The conversion of Chlorobenzaldehyde into 4-phenyl benzaldehyde has yield 99% for less than 2 h of reaction time. The catalyst shows high recyclability upto seven runs and easily separated from the reaction medium by filtration. PPI supported Cu-Ni-Pd nanoparticles catalysts were found to be promising, simple in preparation and stable for the Suzuki cross-coupling at mild temperature. Dendrimer ; Catalysis ; Imine ; Nanoparticle ; Coupling reaction ; Chemistry ; Coupling (piping) ; Polymer chemistry ; Materials science ; Photochemistry ; Nanotechnology ; Organic chemistry ; Metallurgy Dendrimers and Hyperbranched Polymers ; Catalytic Cross-Coupling Reactions ; Conducting polymers and applications
Authors: Bohdan V. Vashchenko | Eduard Litskan
Source: Journal of organic and pharmaceutical chemistry (article, 2025-05-13)
Field: Chemistry — Organic Chemistry

The Synthesis of 2,5-Dioxaspiro[3.4]octane Building Blocks: Three-Dimensional Spirocyclic Analogs of 1,4-Dioxanes A ring-closing metathesis (RCM) strategy was employed for the synthesis of spirooxetane compounds with a tetrahydrofuran (THF) core. The approach proposed relied on the preparation of an unsaturated spirooxetane from vinyl oxetanol. The reaction sequence involved the NaH-mediated О-alkylation with methyl 2-(bromomethyl)acrylate in the presence of TBAI. The subsequent RCM reaction using the Grubbs’ II catalyst gave the dihydrofuran carboxylate with a yield of 70 %. The hydrogenation under high-pressure conditions using a Pearlman’s catalyst made it possible to obtain the saturated THF-derived carboxylate, which was then subjected to alkaline hydrolysis to give a stable lithium carboxylate. The corresponding alcohol obtained via LiAlH4-mediated reduction of the ester was oxidized to the corresponding aldehyde using DMP. The alcohol was further converted into a mesylate serving as a precursor for the corresponding amine and bromide. The set of dioxane analogs proposed can serve as promising building blocks readily available on a multigram scale for the scientific community. Octane ; Chemistry ; Stereochemistry ; Arithmetic ; Combinatorial chemistry ; Computer science ; Mathematics ; Organic chemistry Asymmetric Synthesis and Catalysis ; Oxidative Organic Chemistry Reactions ; Synthetic Organic Chemistry Methods
Authors: Kush G. Patel | Ryan K. Maynard | Grant Crane | Diana Maritza Marulanda Cardona | Angela Sun | Graham T. Fenn | Michael L. Broich | Jason Locklin
Source: Journal of Applied Polymer Science (article, 2025-07-17)
Field: Materials Science — Biomaterials

Hansen Solubility Parameter Guided Development of Furan‐2,5‐Dicarboxylate Plasticizers for Poly(3‐Hydroxybutyrate‐<i>co</i>‐3‐Hydroxyhexanoate) ABSTRACT Most “green” plasticizers have poor compatibility with poly(3‐hydroxybutyrate‐ co ‐3‐hydroxyhexanoate) (PHB‐ co ‐HHx), which limits their practical use. Herein, Hansen solubility parameters (HSP) were used to design compatible plasticizers derived from furan‐2,5‐dicarboxylic acid for PHB‐ co ‐HHx. Of the seven derivatives, dipropyl furan‐2,5‐dicarboxylate (DPF; RED—0.23) and di(2‐ethylhexyl) furan‐2,5‐dicarboxylate (DEHF; RED—0.46)), were the most efficient plasticizers, and their blends with PHB‐ co ‐HHx were compared with diethyl phthalate (DEP; RED—0.25). T g depression and Young's modulus of DPF loaded samples were comparable to DEP. However, DPF plasticized samples show much higher % strain at break and slower leaching behavior than DEP. The trend continues as the samples age, and overall performance of DPF loaded samples was observed to be higher than the DEP samples. DEHF samples, on the other hand, showed limited T g depression at loadings greater than 10% w/w but have lower % strain than DEP. However, DEHF does not leach from PHB‐ co ‐HHx under accelerated aging studies. Further studies via polarized optical microscopy (POM) revealed that DEHF phase separates at loadings above 10% w/w, limiting plasticizer migration. Data from POM micrographs correlate with the RED values as the DPF forms a homogenous phase at loadings as high as 50% w/w, while DEP phase separates at the maximum loading. Plasticizer ; Miscibility ; Furan ; Solubility ; Chemistry ; Nuclear chemistry ; Chemical engineering ; Materials science ; Polymer chemistry ; Organic chemistry ; Polymer biodegradable polymer synthesis and properties ; Polymer crystallization and properties ; Polymer Science and PVC
Authors: Dimitris Tsiourvas | Zili Sideratou | Eleni Mavrogonatou | Dimitris Kletsas | Vicky Sophianopoulou | Spiros Gerostathis
Source: Research Square (preprint, 2025-05-30)
Field: Chemistry — Organic Chemistry

Copper-Chelated Hyperbranched Polyethyleneimines with Antifungal Activity against quiescent conidia and germlings of the opportunistic fungal pathogen Aspergillus nidulans Aspergillus nidulans ; Antifungal ; Conidium ; Fungal pathogen ; Opportunistic pathogen ; Microbiology ; Chelation ; Pathogen ; Fungal growth ; Aspergillus ; Biology ; Botany ; Chemistry ; Biochemistry ; Organic chemistry Antimicrobial agents and applications ; Fungal Plant Pathogen Control ; Dendrimers and Hyperbranched Polymers