jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Jin Wang | Shengyi Yang | Liang Zhang | Xuedong Xiao | Zihao Deng | Xinmeng Chen | Cheng Liu | Gongyue Huang | Ryan T. K. Kwok | Jacky W. Y. Lam | Ben Zhong Tang
Source: Journal of the American Chemical Society (article, 2024-11-04)
Field: Chemistry — Inorganic Chemistry

Constructing Flexible Crystalline Porous Organic Salts via a Zwitterionic Strategy The unique ionic channels and highly polar pore structures have distinguished crystalline porous organic salts (CPOSs) from conventional porous frameworks in the past decade. Up to now, CPOSs were all constructed by a monoionic strategy, in which two types of building units individually bearing anionic or cationic groups were introduced, thus increasing complexity in the synthesis of CPOSs. In this study, by utilizing stereoisomeric compounds of TPE-NS-Z or TPE-NS-E bearing both anionic and cationic groups as a single building unit, the zwitterionic strategy was proven feasible in constructing CPOSs. Benefiting from the single building unit, the zwitterionic strategy simplified the preparation process and reduced the difficulty in studying the aggregation behavior of building units into CPOSs. And also, this novel strategy enabled precise control of the finally obtained CPOSs through fine-tuning of the initial building units. Surprisingly, the special parallel/vertical alternated stacking mode and unique ionic interaction networks in the crystal structure provided the flexible pore characteristic of CPOS-E, which further guaranteed the multitime controllable release of highly polar chemicals in different solvents. Chemistry ; Porosity ; Chemical engineering ; Organic chemistry Metal-Organic Frameworks: Synthesis and Applications ; Covalent Organic Framework Applications ; Membrane Separation and Gas Transport
Authors: Till Schertenleib | Vikram V. Karve | Dragos Stoian | Mehrdad Asgari | Olga Trukhina | Emad Oveisi | Mounir Mensi | Wendy L. Queen
Source: Chemical Science (article, 2024-01-01)
Field: Chemistry — Inorganic Chemistry

A post-synthetic modification strategy for enhancing Pt adsorption efficiency in MOF/polymer composites Growing polymers inside porous metal-organic frameworks (MOFs) can allow incoming guests to access the backbone of otherwise non-porous polymers, boosting the number and/or strength of available adsorption sites inside the porous support. In the present work, we have devised a novel post-synthetic modification (PSM) strategy that allows one to graft metal-chelating functionality onto a polymer backbone while inside MOF pores, enhancing the material's ability to recover Pt(iv) from complex liquids. For this, polydopamine (PDA) was first grown inside of a MOF, known as Fe-BTC (or MIL-100 Fe). Next, a small thiol-containing molecule, 2,3-dimercapto-1-propanol (DIP), was grafted to the PDA <i>via</i> a Michael addition. After the modification of the PDA, the Pt adsorption capacity and selectivity were greatly enhanced, particularly in the low concentration regime, due to the high affinity of the thiols towards Pt. Moreover, the modified composite was found to be highly selective for precious metals (Pt, Pd, and Au) over common base metals found in electronic waste (<i>i.e.</i>, Pb, Cu, Ni, and Zn). X-ray photoelectron spectroscopy (XPS) and <i>in situ</i> X-ray absorption spectroscopy (XAS) provided insight into the Pt adsorption/reduction process. Last, the PSM was extended to various thiols to demonstrate the versatility of the chemistry. It is hoped that this work will open pathways for the future design of novel adsorbents that are fine-tuned for the rapid, selective retrieval of high-value and/or critical metals from complex liquids. Adsorption ; Materials science ; Polymer ; Composite material ; Synthetic polymer ; Chemical engineering ; Chemistry ; Organic chemistry ; Engineering Metal-Organic Frameworks: Synthesis and Applications ; Corrosion Behavior and Inhibition ; Advanced Photocatalysis Techniques
Authors: Jingzheng Zhang | Yibao Zhang | H Chai | Hui-Ling Luo | ChenXia Du | Ren‐Wu Huang | Shuang‐Quan Zang
Source: Angewandte Chemie International Edition (article, 2024-09-19)
Field: Chemistry — Organic Chemistry

Selectivity Modulation of Multistep Reduction Reactions by Gold Nanoclusters The selective synthesis of valuable azo- and azoxyaromatic chemicals via transfer coupling of nitroaromatic compounds has been achieved by fine-tuning the catalyst structure. Here, a direct method to modulate nitrobenzene reduction and selectively alter the product from azobenzene to azoxybenzene by employing the size effect of Au is reported. Au nanoclusters (NCs) with smaller sizes embedded in ZIF-8 controllably converted nitrobenzene into azoxybenzene, while supported Au nanoparticles (NPs) selectively catalyzed nitrobenzene reduction to azobenzene. X-ray photoelectron spectroscopy (XPS) and Diffuse reflectance infrared Fourier transform spectroscopy on CO adsorption (CO-DRIFTS) of Au NC/ZIF-8 revealed a higher valence state and a lower electron density of Au than that of Au NP/ZIF-8, combined with the desorption of azoxybenzene from the Au NC and Au NP surface, suggesting that the Au NCs with lower electron density exhibit stronger adsorption. Density functional theory (DFT) calculations and charge density difference maps indicated that azoxybenzene bonded to Au NC/ZIF-8 with greater adsorption energy, resulting in more electron transfer between azoxybenzene and the generated Au sites, which inhibited further reduction of azoxybenzene and resulted in high azoxybenzene selectivity. The application of the size effect of Au particles to regulate nitrobenzene transfer coupling provided new insights into the structure-selectivity relationships. Nanoclusters ; Modulation (music) ; Reduction (mathematics) ; Selectivity ; Chemistry ; Materials science ; Nanotechnology ; Physics ; Organic chemistry ; Mathematics ; Catalysis Nanomaterials for catalytic reactions ; Nanocluster Synthesis and Applications ; Catalytic Processes in Materials Science
Authors: Ajay Sharma | Manoj Singh | Varruchi Sharma | Amit Vashishth | Mayank Raj | Sushil Kumar Upadhyay | Sandeep Singh | Seema Ramniwas | Kuldeep Dhama | Anil Kumar Sharma | Shashi Kant Bhatia
Source: Colloids and Surfaces B Biointerfaces (article, 2024-01-05)
Field: Materials Science — Biomaterials

Current paradigms in employing self-assembled structures: Drug delivery implications with improved therapeutic potential Micelle ; Drug delivery ; Biocompatibility ; Amphiphile ; Nanotechnology ; Copolymer ; Drug ; Materials science ; Targeted drug delivery ; Chemistry ; Aqueous solution ; Organic chemistry ; Pharmacology ; Polymer ; Medicine Nanoparticle-Based Drug Delivery ; Advanced Drug Delivery Systems ; Advanced Polymer Synthesis and Characterization
Authors: Maarten Debruyne | Pascal Van Der Voort | Véronique Van Speybroeck | Christian V. Stevens
Source: Chemistry - A European Journal (article, 2024-03-18)
Field: Materials Science — Materials Chemistry

The Application of Porous Organic Polymers as Metal Free Photocatalysts in Organic Synthesis Concerns about increasing greenhouse gas emissions and their effect on our environment highlight the urgent need for new sustainable technologies. Visible light photocatalysis allows the clean and selective generation of reactive intermediates under mild conditions. The more widespread adoption of the current generation of photocatalysts, particularly those using precious metals, is hampered by drawbacks such as their cost, toxicity, difficult separation, and limited recyclability. This is driving the search for alternatives, such as porous organic polymers (POPs). This new class of materials is made entirely from organic building blocks, can possess high surface area and stability, and has a controllable composition and functionality. This review focuses on the application of POPs as photocatalysts in organic synthesis. For each reaction type, a representative material is discussed, with special attention to the mechanism of the reaction. Additionally, an overview is given, comparing POPs with other classes of photocatalysts, and critical conclusions and future perspectives are provided on this important field. Photocatalysis ; Environmental science ; Porosity ; Materials science ; Polymer ; Nanotechnology ; Porous medium ; Biochemical engineering ; Waste management ; Chemistry ; Organic chemistry ; Catalysis ; Engineering Covalent Organic Framework Applications ; Metal-Organic Frameworks: Synthesis and Applications ; Advanced Photocatalysis Techniques
Authors: Mozhgan Shahmirzaee | Atsushi Nagai
Source: Small (article, 2024-02-17)
Field: Materials Science — Materials Chemistry

An Appraisal for Providing Charge Transfer (CT) Through Synthetic Porous Frameworks for their Semiconductor Applications In recent years, there has been considerable focus on the development of charge transfer (CT) complex formation as a means to modify the band gaps of organic materials. In particular, CT complexes alternate layers of aromatic molecules with donor (D) and acceptor (A) properties to provide inherent electrical conductivity. In particular, the synthetic porous frameworks as attractive D-A components have been extensively studied in recent years in comparison to existing D-A materials. Therefore, in this work, the synthetic porous frameworks are classified into conjugated microporous polymers (CMPs), covalent organic frameworks (COFs), and metal-organic frameworks (MOFs) and compare high-quality materials for CT in semiconductors. This work updates the overview of the above porous frameworks for CT, starting with their early history regarding their semiconductor applications, and lists CT concepts and selected key developments in their CT complexes and CT composites. In addition, the network formation methods and their functionalization are discussed to provide access to a variety of potential applications. Furthermore, several theoretical investigations, efficiency improvement techniques, and a discussion of the electrical conductivity of the porous frameworks are also highlighted. Finally, a perspective of synthetic porous framework studies on CT performance is provided along with some comparisons. Microporous material ; Materials science ; Metal-organic framework ; Nanotechnology ; Porous medium ; Porosity ; Semiconductor ; Characterization (materials science) ; Organic chemistry ; Optoelectronics ; Chemistry ; Adsorption ; Composite material Covalent Organic Framework Applications ; Metal-Organic Frameworks: Synthesis and Applications ; Conducting polymers and applications
Authors: Guozhen Hou | Ying‐Ya Liu | Yu Gai | Guoying Han | Yi Ji | Guangjin Hou | Anjie Wang | Yiwei Liu | Pascal Van Der Voort | Xiao Feng
Source: Chemical Engineering Journal (article, 2024-05-10)
Field: Materials Science — Materials Chemistry

Catalytic open metal sites in Ti-MOFs obtained through plasma treatment for oxidative desulfurization Flue-gas desulfurization ; Catalysis ; Oxidative phosphorylation ; Plasma ; Metal ; Chemical engineering ; Materials science ; Chemistry ; Waste management ; Inorganic chemistry ; Metallurgy ; Organic chemistry ; Engineering Catalytic Processes in Materials Science ; Catalysis and Hydrodesulfurization Studies ; Metal-Organic Frameworks: Synthesis and Applications
Authors: Nikolaos Karousis | Dimitrios Tasis
Source: Energy Advances (article, 2024-01-01)
Field: Materials Science — Materials Chemistry

Porous covalent organic frameworks in photocatalytic ROS-mediated processes Porous covalent organic frameworks towards photocatalytic ROS-mediated hydrogen peroxide production and organic substances degradation. Photocatalysis ; Covalent bond ; Porosity ; Chemical engineering ; Chemistry ; Porous medium ; Materials science ; Nanotechnology ; Photochemistry ; Environmental chemistry ; Organic chemistry ; Catalysis ; Engineering Covalent Organic Framework Applications ; Metal-Organic Frameworks: Synthesis and Applications ; Advanced Photocatalysis Techniques
Authors: Wanjun Xu | Zhixing Lin | Chan‐Jin Kim | Zhaoran Wang | Tianzheng Wang | Christina Cortez‐Jugo | Frank Caruso
Source: Science Advances (article, 2024-12-13)
Field: Chemistry — Inorganic Chemistry

Assembly and biological functions of metal-biomolecule network nanoparticles formed by metal-phosphonate coordination Metal-organic networks have attracted widespread interest owing to their hybrid physicochemical properties. Natural biomolecules represent attractive building blocks for these materials because of their inherent biological function and high biocompatibility; however, assembling them into coordination network materials, especially nanoparticles (NPs), is challenging. Herein, we exploit the coordination between metal ions and phosphonate groups, which are present in many biomolecules, to form metal-biomolecule network (MBN) NPs in aqueous solution at room temperature. Various phosphonate-containing biomolecules, including plant phytate, DNA, and proteins, were used to assemble MBN NPs with tunable physicochemical properties (e.g., size). In addition to excellent biocompatibility and high cargo-loading efficiency (>95%), these two-component MBN NPs have various biological functionalities, including endosomal escape, immune regulation, and molecular recognition, thus offering advantages over nonbiomolecular-based coordination materials. This work expands our understanding of metal-organic chemistry with the emerging class of metal-biomolecule systems and provides a pathway for incorporating biofunctionalities into advanced coordination materials for diverse fields. Biomolecule ; Biocompatibility ; Nanotechnology ; Phosphonate ; Nanoparticle ; Materials science ; Nanomedicine ; Metal ; Coordination complex ; Chemistry ; Combinatorial chemistry ; Organic chemistry Metal-Organic Frameworks: Synthesis and Applications ; Advanced biosensing and bioanalysis techniques ; Advanced Nanomaterials in Catalysis
Authors: Smriti Yadav | Prabeen Kumar Padhy | Ashish Kumar Singh | Supriya Sharma | Tanu Tanu | Siraj Fatima | Anurag Sinha | Ramsha Tariq | Varsha Varsha | Sandeep Sharma | Smriti Priya
Source: Materials Advances (article, 2024-01-01)
Field: Materials Science — Biomaterials

Advancements in amyloid-based biological materials for healthcare, environmental and sensing applications The review discusses advancements in amyloid fibril-based materials and their applications in healthcare, sensing, and the environment. These biomaterials are sustainable and greener alternatives to conventional synthetic materials. Amyloid fibril ; Health care ; Nanotechnology ; Human health ; Materials science ; Computer science ; Biochemical engineering ; Data science ; Engineering ; Amyloid β ; Medicine ; Political science ; Pathology Supramolecular Self-Assembly in Materials ; Nanocomposite Films for Food Packaging ; Conducting polymers and applications
Authors: Ran Chen | Ahmad Hammoud | Paméla Aoun | Mayte A. Martínez‐Aguirre | Nicolas Vanthuyne | Régina Maruchenko | Patrick Brocorens | Laurent Bouteiller | Matthieu Raynal
Source: Nature Communications (article, 2024-05-15)
Field: Chemistry — Organic Chemistry

Switchable supramolecular helices for asymmetric stereodivergent catalysis Despite recent developments on the design of dynamic catalysts, none of them have been exploited for the in-situ control of multiple stereogenic centers in a single molecular scaffold. We report herein that it is possible to obtain in majority any amongst the four possible stereoisomers of an amino alcohol by means of a switchable asymmetric catalyst built on supramolecular helices. Hydrogen-bonded assemblies between a benzene-1,3,5-tricarboxamide (BTA) achiral phosphine ligand coordinated to copper and a chiral BTA comonomer are engaged in a copper-hydride catalyzed hydrosilylation and hydroamination cascade process. The nature of the product stereoisomer is related to the handedness of the helices and can thus be directed in a predictable way by changing the nature of the major enantiomer of the BTA comonomer present in the assemblies. The strategy allows all stereoisomers to be obtained one-pot with similar selectivities by conducting the cascade reaction in a concomitant manner, i.e. without inverting the handedness of the helices, or sequentially, i.e. by switching the handedness of the supramolecular helices between the hydrosilylation and hydroamination steps. Supramolecular helical catalysts appear as a unique and versatile platform to control the configuration of molecules or polymers embedding several stereogenic centers. Stereocenter ; Supramolecular chemistry ; Hydroamination ; Chemistry ; Comonomer ; Combinatorial chemistry ; Enantioselective synthesis ; Stereochemistry ; Hydrosilylation ; Ligand (biochemistry) ; Helix (gastropod) ; Catalysis ; Molecule ; Intramolecular force ; Organic chemistry Synthesis and Properties of Aromatic Compounds ; Axial and Atropisomeric Chirality Synthesis ; Supramolecular Self-Assembly in Materials
Authors: Jianyu Wang | Xiaobo Chen | Chaoran Li | Yaguang Zhu | Jing Li | Shiyao Shan | Adrian Hunt | Iradwikanari Waluyo | J. Anibal Boscoboinik | Chuan‐Jian Zhong | Guangwen Zhou
Source: ACS Catalysis (article, 2024-03-30)
Field: Materials Science — Materials Chemistry

Tuning Strong Metal–Support Interactions via Synergistic Alloying The encapsulation phenomenon associated with a strong metal–support interactions (SMSI) has been largely restricted to catalyst systems consisting of group VIII metals with high surface energy and reducible transition metal oxide supports with low surface energy. Here, we demonstrate an encapsulation phenomenon that, while sharing morphological similarities with conventional SMSI, follows a distinctive pathway. This is shown by the encapsulation of CuAu nanoparticles (NPs) supported on a highly ordered pyrolytic graphite (HOPG). Through dynamic monitoring of Cu, Au, and Cu50Au50 NPs in an oxidizing atmosphere using ambient-pressure X-ray photoelectron spectroscopy, we show that this spontaneous encapsulation is achieved through the synergistic effect of the alloying elements. Specifically, the surface segregation of Cu promotes dissociative O2 adsorption, leading to the formation of atomic O species, while the subsurface enrichment of Au hinders O incorporation of oxygen into the bulk of CuAu NPs. Consequently, O spillover onto the graphite support occurs, resulting in the oxidation of the HOPG surface into graphitic oxide species. The higher affinity of the graphitic oxide species toward the Cu-segregated surface prompts their migration from the HOPG support to encapsulate the CuAu NPs. These results transcend the conventional SMSI and bear practical implications for the design and development of heterogeneous catalysts, particularly in carbon-supported alloy systems. Catalysis ; Materials science ; Oxide ; Oxidizing agent ; X-ray photoelectron spectroscopy ; Nanoparticle ; Chemical engineering ; Pyrolytic carbon ; Metal ; Adsorption ; Alloy ; Transition metal ; Nanotechnology ; Graphite ; Oxygen ; Chemical physics ; Chemistry ; Physical chemistry ; Metallurgy ; Organic chemistry ; Pyrolysis Catalytic Processes in Materials Science ; Electrocatalysts for Energy Conversion ; Nanomaterials for catalytic reactions
Authors: Ecem Tiryaki | Tolga Zorlu | Ramón A. Álvarez‐Puebla
Source: Chemistry - A European Journal (article, 2024-01-31)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Magnetic–Plasmonic Nanocomposites as Versatile Substrates for Surface–enhanced Raman Scattering (SERS) Spectroscopy Surface-enhanced Raman scattering (SERS) spectroscopy, a highly sensitive technique for detecting trace-level analytes, relies on plasmonic substrates. The choice of substrate, its morphology, and the excitation wavelength are crucial in SERS applications. To address advanced SERS requirements, the design and use of efficient nanocomposite substrates have become increasingly important. Notably, magnetic-plasmonic (MP) nanocomposites, which combine magnetic and plasmonic properties within a single particle system, stand out as promising nanoarchitectures with versatile applications in nanomedicine and SERS spectroscopy. In this review, we present an overview of MP nanocomposite fabrication methods, explore surface functionalization strategies, and evaluate their use in SERS. Our focus is on how different nanocomposite designs, magnetic and plasmonic properties, and surface modifications can significantly influence their SERS-related characteristics, thereby affecting their performance in specific applications such as separation, environmental monitoring, and biological applications. Reviewing recent studies highlights the multifaceted nature of these materials, which have great potential to transform SERS applications across a range of fields, from medical diagnostics to environmental monitoring. Finally, we discuss the prospects of MP nanocomposites, anticipating favorable developments that will make substantial contributions to various scientific and technological areas. Plasmon ; Nanotechnology ; Nanocomposite ; Materials science ; Surface-enhanced Raman spectroscopy ; Raman scattering ; Nanomedicine ; Surface modification ; Plasmonic nanoparticles ; Raman spectroscopy ; Magnetic nanoparticles ; Nanoparticle ; Optoelectronics ; Chemical engineering ; Optics ; Engineering ; Physics Gold and Silver Nanoparticles Synthesis and Applications ; Nanoparticles: synthesis and applications ; Advanced Nanomaterials in Catalysis
Authors: Thanaphorn Rakkan | Sixuan Zhang | Sandro Lehner | Rudolf Hufenus | Kanokphorn Sangkharak | Qun Ren
Source: International Journal of Biological Macromolecules (article, 2024-06-30)
Field: Materials Science — Biomaterials

Bio-based modification of polyhydroxyalkanoates (PHA) towards increased antimicrobial activities and reduced cytotoxicity With the increased occurrence of bacteria resistance to conventional antibiotics, the development of novel antimicrobials is urgently needed. Traditional biomaterials used for delivering these agents often struggle to achieve sustained release while maintaining non-cytotoxic properties. In this study, we present an innovative approach using bacterial polyhydroxyalkanoates (PHA) as a carrier for antimicrobial delivery, specifically designed for wound healing applications. Octenidine dihydrochloride (OCT), a widely used antimicrobial agent, served as our model drug. To achieve the desired balance of OCT release and low cytotoxicity, we introduced a novel bio-derived additive, 3-hydroxy-pentadecanoic acid (3OHC15), extracted from bacteria. This additive significantly improved the hydrophilicity of PHA films, resulting in enhanced and sustained release of OCT. Importantly, the additive did not adversely affect the material's tensile strength or thermal properties. The increased OCT release led to improved antibacterial activity against both Gram-negative and -positive strains. Most notably, the incorporation of 3OHC15 in PHA mitigated the cytotoxic effects of the released drug on human fibroblasts, ensuring biocompatibility. This work represents a novel strategy in the design of biomaterials for the delivery of bioactive compounds, achieving a critical balance between efficacy and cytocompatibility, and marks a significant advancement in the field of antimicrobial delivery systems. Polyhydroxyalkanoates ; Antimicrobial ; Cytotoxicity ; Biocompatibility ; Drug delivery ; Chemistry ; Antibiotics ; Pharmacology ; Bacteria ; Microbiology ; Biochemistry ; Medicine ; In vitro ; Biology ; Organic chemistry biodegradable polymer synthesis and properties ; Antimicrobial agents and applications ; Graphene and Nanomaterials Applications