jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Simon Nier | Niklas Rinn | Lukas Guggolz | Stefanie Dehnen
Source: Chemistry - A European Journal (article, 2024-07-06)
Field: Chemistry — Organic Chemistry

Dimers and 2D Networks of Adamantane‐Related Ternary Organosilicon Coinage Metal Sulfide Clusters Adamantane-type organotin sulfide clusters were recently shown to react with coinage metal phosphine complexes under replacement of an organic substituent by a metal-phosphine unit. An extension of such studies involving the silicon-based congener [(PhSi)<sub>4</sub>S<sub>6</sub>] (A) revealed that the cluster core will be partly disassembled and a {PhSi} moiety is replaced by a coinage metal phosphine complex to form [(Et<sub>3</sub>PAg)<sub>3</sub>(PhSi)<sub>3</sub>S<sub>6</sub>] (B) and [Na<sub>2</sub>(thf)<sub>2.33</sub>][(Me<sub>3</sub>PCu)(PhSi)<sub>3</sub>S<sub>6</sub>] (C). Herein, we present an extension of this work upon variation of the reactants and reaction conditions. Besides the isolation of crystalline precursor complexes [CuCl(PMe<sub>2</sub>Ph)<sub>3</sub>] (1) and [AgCl(PMe<sub>2</sub>Ph)<sub>2</sub>]<sub>2</sub> (2), the study addresses reactions of A with AgCl and a phosphine ligand in CH<sub>2</sub>Cl<sub>2</sub>, upon which A is completely disassembled to form [(Ph<sub>3</sub>P)<sub>3</sub>Ag(μ-S)SiCl<sub>2</sub>Ph] (3). In another case a CH<sub>2</sub> group, most likely stemming from CH<sub>2</sub>Cl<sub>2</sub>, was attached to the ligand, thus generating [{PhCl(S)SiSCH<sub>2</sub>P(Ph<sub>2</sub>)CH<sub>2</sub>CH<sub>2</sub>}<sub>2</sub>] (4). Upon using CuCl and 1,4-bis(diphenylphosphino)butane (dppb) we isolated the phosphine-bridged analog of B, [{(dppbCu<sub>2</sub>)CuP(Ph<sub>2</sub>)(CH<sub>2</sub>CH<sub>2</sub>)(PhSi)<sub>3</sub>S<sub>6</sub>}<sub>2</sub>] (5). In order to receive the yet elusive silver homolog of C, we used PMe<sub>2</sub>Ph as a bulkier ligand. This way we generated a 2D coordination polymer of the desired composition, [Na<sub>2</sub>(thf)<sub>1.5</sub>][(Me<sub>2</sub>PhPAg)(PhSi)<sub>3</sub>S<sub>6</sub>] (6). UV-visible spectra of 6 indicated a bandgap of 3.89 eV, thus blue-shifted in regards to B and C. Phosphine ; Chemistry ; Ligand (biochemistry) ; Substituent ; Sulfide ; Metal ; Adamantane ; Moiety ; Crystallography ; Isopropyl ; Stereochemistry ; Polymer chemistry ; Medicinal chemistry ; Organic chemistry ; Catalysis Organometallic Compounds Synthesis and Characterization ; Organometallic Complex Synthesis and Catalysis ; Inorganic Chemistry and Materials
Authors: R. M. Kurganov | Oleh V. Svaliavyn | E. A. Pashchenko | D. O. Savchenko | Alexander B. Rozhenko | Sergey V. Ryabukhin | Dmitriy M. Volochnyuk
Source: Journal of organic and pharmaceutical chemistry (article, 2024-12-23)
Field: Materials Science — Polymers and Plastics

High-Temperature Polymer Components Reimagined: Scalable Syntheses and de novo Routes to Structurally Versatile Precursors Developing efficient and scalable synthetic protocols for key polymer precursors is crucial to advancing high-performance materials designed to withstand severe thermal environments. In this article, we report on the development of solid, high-yield methods for preparing structurally diverse building blocks, including s-triazine derivatives, phenyl-borosilane alkynyl oligomers, phthalonitrile-based monomers, and novel diamine curing agents on multi-gram to multi-hundred-gram scales. These carefully optimized procedures use readily available starting materials, mild conditions, and well-known synthetic transformations, thus addressing the longstanding challenges associated with their practical upscaling. The resulting library of monomers and oligomers offers a broad range of reactive functional groups (e.g., nitriles, alkynes, borosilane motifs), enabling future combinatorial-like strategies for the formation of advanced co-polymers with enhanced thermal stability, mechanical strength, and tunable properties suitable for high-temperature applications. Phthalonitrile ; Thermal stability ; Monomer ; Polymer ; Materials science ; Combinatorial chemistry ; Curing (chemistry) ; Scalability ; Nanotechnology ; Computer science ; Chemistry ; Polymer chemistry ; Organic chemistry ; Composite material Synthesis and properties of polymers ; Carbon dioxide utilization in catalysis ; N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
Authors: Dmitry Erzunov | Svetlana Tonkova | Ilya Sarvin | А. С. Вашурин
Source: Scientia Pharmaceutica (article, 2024-08-28)
Field: Materials Science — Materials Chemistry

Synthesis and Catalytic Activity of Novel Complexes Based on Cyano-Substituted Phthalocyanines as Promising Drug Conversion Agents This paper presents the results of obtaining new cobalt and zinc complexes based on dicyanophenoxy-substituted carboxypthalocyanine. The original method of synthesis and isolation of the compound is shown; its spectroscopic and photophysical characteristics are studied. Studies show the absence of aggregation processes in organic media for solutions of complexes in working concentration ranges. This shows the possibility of the practical application of structures as catalysts. The high catalytic activity of cobalt complexes with dicyanophenoxy-substituted carboxyphthalocyanine ligand in the conversion reaction of sodium diethyldithiocarbamate to disulfiram, which is an active component of drugs for the treatment of alcohol dependence, is determined. Drug ; Catalysis ; Combinatorial chemistry ; Chemistry ; Pharmacology ; Organic chemistry ; Medicine Porphyrin and Phthalocyanine Chemistry ; Organic Chemistry Cycloaddition Reactions ; Metal-Catalyzed Oxygenation Mechanisms
Authors: Yuhao Shi
Source: Transactions on Engineering and Technology Research (article, 2024-12-20)
Field: Materials Science — General Materials Science

Application of Smart Materials in Civil Engineering In the ever-evolving wave of technology, smart materials have emerged in the field of civil engineering, and their unique characteristics and wide application prospects have gradually become the focus of the industry. Not only do they sense and respond to environmental changes, but they also show great potential in critical applications such as structural health monitoring, seismic reinforcement, and self-healing, providing unprecedented solutions for the maintenance and construction of civil engineering. This article elaborates on the properties and classification of smart materials, and delves into their specific applications in civil engineering, covering structural health monitoring, seismic reinforcement, self-healing, and more. At the same time, the paper analyzes the challenges faced by the application of smart materials and looks forward to their future development trends. The conclusions of the study show that smart materials are revolutionizing many fields such as architecture, improving efficiency and stimulating new applications. In civil engineering, they enhance structural safety, maintenance efficiency, and environmental adaptation, such as self-healing concrete to extend life, smart sensors to monitor health, smart road systems to recover energy, and promote green buildings. Despite the challenges of cost and technology maturity, multidisciplinary integration, standardization and sustainable development strategies bode well for the industry to become smarter, greener and more innovative. Construction engineering ; Engineering ; Civil engineering ; Architectural engineering Material Properties and Applications
Authors: Marichandran Vadivel | Swamynathan K | K. Swamynathan | Sandeep Kumar
Source: Asian Journal of Organic Chemistry (article, 2024-12-06)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Synthesis and Characterization of Novel Mesomorphic Chromenonapthophenathridines Abstract Heterocyclic discotic liquid crystals containing heteroatoms such as O, N, S, Se, P as part of π‐conjugated framework has revolutionized organic semiconductors research. The presence of heteroatom in π‐conjugated core has been reported to strikingly influence the self‐assembling properties. In this work we have synthesized novel chromenophenanthridines where the incorporation of oxygen facilitates the in plane ordering of central core and improves liquid crystalline character in these molecules. This paper elucidates the mesomorphic behavior of chromenonapthophenanthridines prepared via tandem Pictet Spengler cyclisation and ipso‐aromatic substitution in one pot. The synthesized compounds exhibited wide range enantiotropic columnar hexagonal phase. The mesomorphic behavior was suggested as a function of peripheral alkyl chains. The shorter homologue was found to exhibit hexagonal columnar plastic phase whereas higher ones exhibit hexagonal columnar phase. Heteroatom ; Chemistry ; Alkyl ; Conjugated system ; Discotic liquid crystal ; Phase (matter) ; Columnar phase ; Liquid crystal ; Crystallography ; Molecule ; Characterization (materials science) ; Side chain ; Hexagonal crystal system ; Hexagonal phase ; Stereochemistry ; Organic chemistry ; Liquid crystalline ; Nanotechnology ; Materials science ; Polymer Liquid Crystal Research Advancements ; Axial and Atropisomeric Chirality Synthesis ; Synthesis and Properties of Aromatic Compounds
Authors: Vladislav Rac | Vesna Rakić | Ana Palčić | Eddy Dib | G. Postole | Ljiljana Damjanović-Vasilić | Vladimir B. Pavlović | Steva Lević | Sanja Bosnar
Source: Microporous and Mesoporous Materials (article, 2024-12-14)
Field: Chemistry — Inorganic Chemistry

Boron's role in altering MFI-type zeolite Zeolite ; Boron ; Molecular sieve ; Chemical engineering ; Chemistry ; Materials science ; Inorganic chemistry ; Catalysis ; Organic chemistry ; Engineering Zeolite Catalysis and Synthesis ; Chemical Synthesis and Characterization ; Advanced Battery Materials and Technologies
Authors: Brotons Rufes, Artur
Source: Universitat de Girona Digital Repository (Universitat de Girona) (article, 2024-11-11)
Field: Chemistry — Organic Chemistry

Predictive catalysis towards the transformation of C-C bonds ENG- This thesis explores the use of computational chemistry in studying olefin metathesis reactions, a key process in organometallic catalysis. Computational chemistry aims to provide predictive insights into chemical processes, but reliable predictive models have only recently emerged. In organometallic catalysis, computational techniques are still underdeveloped, often limited to post-experimental interpretation. Improving these methods is crucial for achieving accurate predictions. The thesis begins with an overview of olefin metathesis, highlighting its advantages over other carbon-carbon bond-forming methods, such as greater atom economy and functional group tolerance. A bibliographic review traces the evolution of the reaction from its industrial inception to the development of ruthenium-based catalysts. Current challenges include the need for a deeper understanding of catalyst behavior beyond the Chauvin mechanism, issues with reaction selectivity, and the relatively low activity of ruthenium catalysts. After a general introduction to the field of ruthenium olefin metathesis, we move on to the projects carried out during this thesis Olefin metathesis ; Ruthenium ; Olefin fiber ; Field (mathematics) ; Process (computing) ; Atom economy ; Catalysis ; Organometallic chemistry Synthetic Organic Chemistry Methods ; Organometallic Complex Synthesis and Catalysis ; Inorganic and Organometallic Chemistry
Authors: Omar F. Farhat | M. Husham | Azeez A. Barzinjy | Abbas M. Selmanan | Abdulsalam Abuelsamen | M. Bououdina | Asad A. Thahe
Source: Science Journal of University of Zakho (article, 2024-10-31)
Field: Materials Science — Materials Chemistry

MORPHOLOGICAL AND OPTICAL PROPERTIES OF ZNO NANORODS GROWN ONTO SILICON SUBSTRATES: THE IMPACT OF GROWTH TEMPERATURE ZnO nanorods (NRs) have been successfully grown onto Silicon (Si) substrates. The properties of ZnO NRs have been characterized using field emission scanning microscopy, Photoluminescence, and X-ray diffraction. Results showed that the growth temperature (85, 90, 95, and 100oC) significantly affected the properties of ZnO NRs. At a temperature of 95oC, the structural and optical properties have been significantly enhanced, besides, well-aligned ZnO NRs have been obtained. With the rise of growth temperature from 85 to 95oC, the crystallite size increases (52 to 94 nm), and the near band edge emission to deep level emission ratio is enhanced. Besides, the aspect ratio for the prepared ZnO NRs has increased significantly reaching 19.42. This study emphasizes the significance of growth temperature in tunning the structural and microstructural and subsequently the physicochemical properties of ZnO NRs by fine control of the growth temperature. Moreover, a facile and cost-efficient method for fabricating ZnO nanorods for electronic applications based on silicon is presented in this study. Nanorod ; Silicon ; Materials science ; Optoelectronics ; Engineering physics ; Nanotechnology ; Engineering ZnO doping and properties ; Electronic and Structural Properties of Oxides ; Ga2O3 and related materials
Authors: Taishi Oka | Takeshi Maeda | Daisuke Sakamaki | Naoya Suzuki | Shigeyuki Yagi | Shintaro Kodama | Hideki Fujiwara
Source: Institutional Repositories DataBase (IRDB) (article, 2024-10-23)
Field: Materials Science — Materials Chemistry

Intermediate diradical character and thermal cis–trans isomerization of near-infrared absorbing thionated squaraine dyes Diradical ; Isomerization ; Character (mathematics) ; Thermal ; Chromophore Porphyrin and Phthalocyanine Chemistry ; Spectroscopy and Quantum Chemical Studies ; Photochemistry and Electron Transfer Studies
Authors: Sebastian Overmans | Yazan Alflayyeh | Sergio Gutiérrez | Yousef Aldlaigan | Kyle J. Lauersen
Source: bioRxiv (Cold Spring Harbor Laboratory) (preprint, 2024-08-23)
Field: Chemistry — Organic Chemistry

Treatment with Metal-Organic Frameworks (MOFs) elicits secondary metabolite accumulation in <i>Aquilaria crassna</i> (Agarwood) callus culture Abstract Thymelaceaous trees are prized for accumulating fragrant resins composed of hundreds of secondary metabolites in their woody tissues. Slow growth and increasing consumer demand have stretched natural sources of agarwood trees to being endangered and alternative production modes, including silviculture and tissue culture, are currently being investigated. Dedifferentiated tissue culture of agarwood trees provides a means of cell propagation independent of environmental context. However, secondary metabolite accumulation, as found in fragrant resins, occurs largely in response to wounding. Here, we investigated the application of metal-organic frameworks (MOFs) as potential elicitors of secondary metabolite formation in Aquilaria crassna tissue culture samples. Callus cultures were exposed to five commercially available MOFs: UiO-67, MOF-808, HKUST-1, ZIF-67, and MOF-74, and ethanol extracts were used to quantify secondary metabolite accumulation compared to untreated cultures. Samples that were exposed to Zr-based MOFs exhibited similar metabolite production profiles, (trans-2-Carboxy-cyclo-hexyl)-acetic acid was reduced in the presence of all MOFs, the Cu-containing HKUST-1 MOF increased palmitic acid levels, and MOF-808 and ZIF-67 were found to elicit the highest accumulation of secondary metabolites with potential fragrance applications. These results demonstrate the possibility of eliciting secondary metabolites from dedifferentiated agarwood tree cell culture and may provide an alternative means of sourcing fragrant specialty chemicals from these plants. Agarwood ; Secondary metabolite ; Callus ; Botany ; Biology ; Chemistry ; Medicine ; Biochemistry Wood and Agarwood Research ; Tea Polyphenols and Effects ; Ginger and Zingiberaceae research
Authors: Walaa A. Salih | Alaa Al-taie
Source: Al-Nahrain Journal for Engineering Sciences (article, 2024-05-01)
Field: Materials Science — Biomaterials

Strategies of Nanocarrier-Based Therapeutic Drug Delivery In recent years, nanoparticles have gained significant attention in the field of cancer treatment due to their extensive potential and wide range of uses. The research mostly focuses on the inorganic chemicals, with a specific emphasis on metals, in order to enhance the comprehension of functional nanoparticles synthesis. This undertaking is motivated by the distinctive characteristics exhibited by these materials, which provide significant advantages for both fundamental scientific inquiry and practical implementations, notably those focused on cancer. The objective of this review is to conduct a comprehensive analysis of the diverse applications of nanocomposites, with a specific focus on their utilization in medication delivery. Nanocarriers ; Drug delivery ; Drug ; Pharmacology ; Targeted drug delivery ; Medicine ; Nanotechnology ; Materials science Nanoparticle-Based Drug Delivery ; Advanced Drug Delivery Systems
Authors: Pooja Sharma
Source: African Journal of Biomedical Research (review, 2024-12-30)
Field: Chemistry — Organic Chemistry

A Review On Various Synthetic Routes Of Pyrano[3,2-C]Pyridine Derivatives The exploration of pyrano[3,2-c]pyridine derivatives has garnered significant attention due to their diverse pharmacological properties and versatile applications in organic synthesis1 Ramesh et al. This literature review aims to provide a comprehensive overview of the various synthetic strategies employed in the preparation of these complex molecular structures. By examining the existing methodologies. Pyridine ; Chemistry ; Combinatorial chemistry ; Organic chemistry Multicomponent Synthesis of Heterocycles ; Synthesis of Organic Compounds ; Synthesis and biological activity
Authors: Yi Li
Source: Science and Technology of Engineering Chemistry and Environmental Protection (article, 2024-11-12)
Field: Materials Science — Materials Chemistry

Research Progress of MXene/graphene Composites in the Application of Electronic Information Field. The rapid development of electronic information technology has resulted in an increased demand for high-performance electronic materials. Research has focused on MXene/graphene composites due to their exceptional electrical conductivity, mechanical strength, and thermal stability. This paper presents a comprehensive review of the latest research progress in the field of electronic information, with a particular focus on MXene/graphene composites. It provides a detailed analysis of the applications of MXene/graphene composites in key technological areas, including energy storage and conversion, electronic devices, and optoelectronic devices. Additionally, it identifies the current technological challenges and explores potential future developments in this field. It is anticipated that by optimizing the preparation process of the composites and exploring new application areas, MXene/graphene composites will achieve breakthroughs in the fields of flexible electronics, smart sensors, and high-efficiency energy storage. These advancements are anticipated to catalyze a transformative impact on the electronics and information sector, marking a significant leap forward in technological evolution. Electronics ; Field (mathematics) ; Process (computing) ; Transformative learning ; Electronic materials ; Electronic systems ; Key (lock) MXene and MAX Phase Materials ; Advanced Memory and Neural Computing ; Advanced Sensor and Energy Harvesting Materials
Authors: Huaiyu Zhou
Source: E3S Web of Conferences (article, 2024-01-01)
Field: Materials Science — Materials Chemistry

Preparation Method of Nano-Metal Materials and its Application in Catalysis Field The physical and chemical properties of nanometal materials, along with their expansive market potential, have garnered widespread attention, especially in the field of catalysis, where they exhibit remarkable performance. With the in-depth study of the catalytic properties of nanometal materials, this paper aims to systematically explore their characteristics, preparation methods, and applications in various catalytic fields, providing a scientific basis for catalyst design and development, and contributing to environmental issues and enhancement of synthesis efficiency. Utilizing methods such as electrochemical deposition and physical vapor deposition, nanometal materials with catalytic properties have been obtained. Nanometal materials with different physical properties can be applied in various fields such as bioimaging, photocatalysis, electrocatalysis, and organic synthesis, revealing that nanometal materials possess abundant binding sites, excellent electron transfer properties, and corrosion resistance. Through this research, not only a scientific basis for catalyst design and development is provided, but also outstanding contributions are expected to be made to environmental issues and enhancement of synthesis efficiency. At the same time, by applying them in fields such as bioimaging, positive impacts are brought to the development of science and medicine. Nano- ; Catalysis ; Metal ; Field (mathematics) ; Materials science ; Nanotechnology ; Chemical engineering ; Metallurgy ; Chemistry ; Engineering ; Organic chemistry ; Composite material ; Mathematics Catalytic Processes in Materials Science ; Nanomaterials for catalytic reactions ; Copper-based nanomaterials and applications