jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Ahmad Bagheri | Shima H Khabbaz | Amir Abbas Rafati
Source: Scientific Reports (article, 2024-09-28)
Field: Chemistry — Analytical Chemistry

Comparison of the natural and surfactant-modified zeolites in the adsorption efficiency of sunset yellow food dye from aqueous solutions The removal of Sunset Yellow (E110) on natural zeolite and zeolite modified with the cationic surfactant cetyl pyridinium chloride (CPC) was studied using the adsorption method. The structural characteristics of the surfactant-modified zeolite (SMZ-CPC) were investigated using X-ray diffraction(XRD), Fourier transform infrared spectroscopy (FTIR), Brunauer-Emmett-Teller (BET) analysis, and the scanning electron microscopy (SEM) images. The effect of different parameters on the adsorption process, such as equilibration time and amount of adsorbent at 298 K, were determined using UV-Vis spectroscopy. The maximum dye removal percentage on SMZ-CPC was obtained with 0.08 g of adsorbent in 30 min. The results show that the zeolite modified with CPC surfactant (SMZ) has a higher adsorption capacity for Sunset Yellow than the unmodified zeolite (natural form). The experimental adsorption data were nonlinearly analyzed using isotherm equations such as Langmuir, Freundlich, Temkin, Langmuir-Freundlich (or Sips), and Extended Langmuir (EL). The experimental data were better fitted with the Sips isotherm. The adsorption kinetic data were analyzed using eight models in nonlinear forms: the pseudo-first-order (PFO), pseudo-second-order (PSO), integrated kinetic Langmuir (IKL), Elovich, intraparticle diffusion (IPD), mixed order rate equation (MOE), fractal-like pseudo-first-order (FL-PFO) and fractal-like pseudo-second-order (FL-PSO). According to the results of the coefficient of determination (R<sup>2</sup>), Elovich kinetic model well expressed E110 adsorption onto SMZ-CPC. Most of the dye removal takes place in less than 5 min and the maximum adsorption capacity is 5.06 mg/g. The results of this study show that zeolite modified with cationic surfactant is an effective adsorbent for removal anionic dyes from an aqueous solution. Sunset ; Aqueous solution ; Adsorption ; Pulmonary surfactant ; Chemistry ; Chemical engineering ; Zeolite ; Organic chemistry ; Biochemistry ; Catalysis ; Physics ; Engineering Dye analysis and toxicity ; Adsorption and biosorption for pollutant removal ; Water Quality Monitoring and Analysis
Authors: Wonseok Lee | Andrew M. Smith
Source: Nature Synthesis (article, 2024-07-03)
Field: Materials Science — Materials Chemistry

Interdiffusion-enhanced cation exchange for HgSe and HgCdSe nanocrystals with infrared bandgaps Nanocrystal ; Photoluminescence ; Infrared ; Materials science ; Quantum yield ; Passivation ; Infrared spectroscopy ; Absorption (acoustics) ; Nanotechnology ; Yield (engineering) ; Optoelectronics ; Chemical engineering ; Chemistry ; Optics ; Fluorescence ; Organic chemistry Quantum Dots Synthesis And Properties ; Chalcogenide Semiconductor Thin Films ; Nanocluster Synthesis and Applications
Authors: Donglou Ren | Bin Zhu | Jun Xiong | Kai Huang | Muzhi Cai | Cong Liu | Xiaojing Bai | Tao Liu | Xianghua Zhang | Bingsuo Zou
Source: Journal of Colloid and Interface Science (article, 2024-05-09)
Field: Chemistry — Inorganic Chemistry

A novel design of copper selenide/zinc selenide/Nitrogen-doped carbon derived from MOF for sulfadiazine adsorption: Performance and mechanism Adsorption ; Chemistry ; Inorganic chemistry ; Zinc selenide ; Selenide ; Chemical engineering ; Organic chemistry Metal-Organic Frameworks: Synthesis and Applications ; Adsorption and biosorption for pollutant removal ; Advanced Photocatalysis Techniques
Authors: Bo Hu | Qiuchen Du | Yang Yang | Dengdeng Li | Jiawang Fu | Bailing Liu | Hong‐Ying Zang | Yang‐Guang Li | Haiming Xie | Zhongmin Su
Source: Polyoxometalates (article, 2024-09-14)
Field: Materials Science — Materials Chemistry

Facile construction of polyoxometalate-modified polyaryletherketone-based hybrid membranes with enhanced proton conductivity The development of novel proton exchange membranes (PEMs) with high proton conductivity and good mechanical performance as alternatives to Nafion is crucial. Polyoxometalates (POMs), a type of solid-state nanoclusters, possess high proton conductivity and good structural stability, making them suitable functional inorganic fillers to improve the performance of PEMs. Herein, the Keggin-type POM H<sub>3</sub>PW<sub>12</sub>O<sub>40</sub>·<i>n</i>H<sub>2</sub>O (PW<sub>12</sub>) was introduced into sulfonated polyaryletherketone (SPAEK) with closely packed and flexible side chains to construct hybrid membranes (SPAEK-PW<sub>12</sub>-<i>x</i>%, <i>x</i> = 5, 10, 13, 15). Because of its structural characteristics, the nanosized PW<sub>12</sub> induced precise hybridization of the nanophase structure of this ionomeric polymer and the formation of proton transport channels. Additionally, the hydrogen-bonding networks formed by PW<sub>12</sub> and sulfonic acid groups increased the proton conductivity and mechanical strength of the resulting hybrid PEMs and improved the close-packed structure of the PEMs to achieve an appropriate balance between conductivity and fuel permeation. In particular, SPAEK-PW<sub>12</sub>-13% achieved an enhanced proton conductivity of 0.167 S∙cm<sup>−1</sup> at 80 °C, which was 2.2 times greater than that of the pristine membrane. Moreover, the mechanical properties, chemical stability, resistance to methanol penetration, and ionic selectivity of the hybrid membrane were significantly improved upon addition of a moderate amount of PW<sub>12</sub>. This work provides an approach for the design and development of new-generation organic–inorganic hybrid membranes through precise hybridization of POMs. Conductivity ; Proton ; Membrane ; Materials science ; Chemical engineering ; Chemistry ; Physics ; Physical chemistry ; Engineering ; Biochemistry Polyoxometalates: Synthesis and Applications ; Metal-Organic Frameworks: Synthesis and Applications ; Conducting polymers and applications
Authors: Benjamin Willner | Catherine M. Aitchison | Filip Podjaski | Wanpeng Lu | Junfu Tian | James R. Durrant | Iain McCulloch
Source: Journal of the American Chemical Society (article, 2024-10-30)
Field: Materials Science — Materials Chemistry

Correlation between the Molecular Properties of Semiconducting Polymers of Intrinsic Microporosity and Their Photocatalytic Hydrogen Production Increasing the interface area between organic semiconductor photocatalysts and electrolyte by fabricating nanoparticles has proven to be an effective strategy to increase photocatalytic hydrogen production activity. However, it remains unclear if increasing the <i>internal</i> interface by the introduction of porosity has as clear benefits for activity. To better inform future photocatalyst design, a series of polymers of intrinsic microporosity (PIMs) with the same conjugated backbone were synthesized as a platform to independently modulate the variables of porosity and relative hydrophilicity through the use of hydrophilic alcohol moieties protected by silyl ether protecting groups. When tested in the presence of ascorbic acid and photodeposited Pt, a strong correlation between the <i>wettable</i> porosity and photocatalytic activity was found, with the more wettable analogue of two polymers of almost the same surface area delivering 7.3 times greater activity, while controlling for other variables. Transient absorption spectroscopic (TAS) investigation showed efficient intrinsic charge generation within 10 ps in two of the porous polymers, even without the presence of ascorbic acid or Pt. Detectable hole polarons were found to be immediately extracted by added ascorbic acid, suggesting the generation of reactive charges at regions readily accessible to electrolyte in the porous structures. This study directs organic semiconductor photocatalysts design toward more hydrophilic functionality for addressing exciton and charge recombination bottlenecks and clearly demonstrates the advantages of wettable porosity as a design principle. Chemistry ; Photocatalysis ; Polymer ; Chemical engineering ; Hydrogen production ; Hydrogen ; Chemical physics ; Organic chemistry ; Catalysis Covalent Organic Framework Applications ; Advanced Photocatalysis Techniques ; Metal-Organic Frameworks: Synthesis and Applications
Authors: Ngouana Moffo A. Ivane | Wenxiu Wang | Qianyun Ma | Jie Wang | Jianfeng Sun
Source: Food Chemistry X (review, 2024-05-20)
Field: Chemistry — Analytical Chemistry

Harnessing the health benefits of purple and yellow-fleshed sweet potatoes: Phytochemical composition, stabilization methods, and industrial utilization- A review Purple-fleshed sweet potato (PFSP) and yellow-fleshed sweet potato (YFSP) are crops highly valued for their nutritional benefits and rich bioactive compounds. These compounds include carotenoids, flavonoids (including anthocyanins), and phenolic acids etc. which are present in both the leaves and roots of these sweet potatoes. PFSP and YFSP offer numerous health benefits, such as antioxidant, anti-inflammatory, anti-cancer, and neuroprotective properties. The antioxidant activity of these sweet potatoes holds significant potential for various industries, including food, pharmaceutical, and cosmetics. However, a challenge in utilizing PFSP and YFSP is their susceptibility to rapid oxidation and color fading during processing and storage. To address this issue and enhance the nutritional value and shelf life of food products, researchers have explored preservation methods such as co-pigmentation and encapsulation. While YFSP has not been extensively studied, this review provides a comprehensive summary of the nutritional value, phytochemical composition, health benefits, stabilization techniques for phytochemical, and industrial applications of both PFSP and YFSP in the food industry. Additionally, the comparison between PFSP and YFSP highlights their similarities and differences, shedding light on their potential uses and benefits in various food products. Phytochemical ; Food industry ; Health benefits ; Food science ; Antioxidant ; Antioxidant capacity ; Food processing ; Carotenoid ; Chemistry ; Biotechnology ; Biology ; Medicine ; Traditional medicine ; Biochemistry Dye analysis and toxicity ; Phytochemicals and Antioxidant Activities ; Seed and Plant Biochemistry
Authors: Thüong Phan‐Xuan | Simon Schweidler | Steffen Hirte | Moritz Schüller | Ling Lin | Anurag Khandelwal | Kai Wang | Jan Schützke | Markus Reischl | Christian Kübel | Horst Hahn | Gianluca Bello | Johannes Kirchmair | Jasmin Aghassi‐Hagmann | Torsten Brezesinski | Ben Breitung | Lea Ann Dailey
Source: ACS Nano (article, 2024-07-10)
Field: Materials Science — Materials Chemistry

Using the High-Entropy Approach to Obtain Multimetal Oxide Nanozymes: Library Synthesis, <i>In Silico</i> Structure–Activity, and Immunoassay Performance High-entropy nanomaterials exhibit exceptional mechanical, physical, and chemical properties, finding applications in many industries. Peroxidases are metalloenzymes that accelerate the decomposition of hydrogen peroxide. This study uses the high-entropy approach to generate multimetal oxide-based nanozymes with peroxidase-like activity and explores their application as sensors in <i>ex vivo</i> bioassays. A library of 81 materials was produced using a coprecipitation method for rapid synthesis of up to 100 variants in a single plate. The A and B sites of the magnetite structure, (AA')(BB'B'')<sub>2</sub>O<sub>4</sub>, were substituted with up to six different cations (Cu/Fe/Zn/Mg/Mn/Cr). Increasing the compositional complexity improved the catalytic performance; however, substitutions of single elements also caused drastic reductions in the peroxidase-like activity. A generalized linear model was developed describing the relationship between material composition and catalytic activity. Binary interactions between elements that acted synergistically or antagonistically were identified, and a single parameter, the mean interaction effect, was observed to correlate highly with catalytic activity, providing a valuable tool for the design of high-entropy-inspired nanozymes. In silico ; Immunoassay ; Chemistry ; Entropy (arrow of time) ; Nanotechnology ; Materials science ; Thermodynamics ; Physics ; Biology ; Biochemistry Advanced Nanomaterials in Catalysis ; Nanoparticles: synthesis and applications ; Nanoplatforms for cancer theranostics
Authors: Yuxin Zhao | Yichi Zhang | Yong Huang
Source: Angewandte Chemie International Edition (article, 2024-06-12)
Field: Chemistry — Organic Chemistry

Enantioselective Relay Coupling of Perfluoroalkyl and Vinylogous Ketyl Radicals β-Chiral carboxylic acids and their derivatives are highly valuable structural motifs in the fields of asymmetric synthesis and medicinal chemistry. However, the introduction of a sterically demanding sidechain to the β-carbon, such as an all-carbon quaternary center, remains a significant challenge in classical polar processes. Recently, N-heterocyclic carbene (NHC) mediated coupling reactions involving persistent ketyl radicals have emerged as a promising strategy to assemble highly crowded carbon-carbon bonds. Nevertheless, achieving enantioselectivity in these reactions remains highly challenging. In this work, we report our recent progress in controlling enantioselectivity for relay coupling of perfluoroalkyl and persistent vinylogous ketyl radicals. We developed a chiral bifunctional NHC-squaramide catalyst that achieves high facial selectivity in a critical bond-forming event involving the coupling of a congested tertiary carbon radical and vinylogous ketyl radical. Chiral carboxylates bearing an all-carbon quaternary center at the β-position can be prepared in good yield and excellent enantiomeric excess. Results from density functional theory (DFT) calculations and nuclear Overhauser effect (NOE) experiments indicate that the N,N'-diaryl squaramide motif adopts an unusual syn-syn conformation, enabling hydrogen bonding interactions with the enolate oxygen, thereby rigidifying the overall conformation of the transition state. Ketyl ; Chemistry ; Radical ; Squaramide ; Enantioselective synthesis ; Carbene ; Steric effects ; Photochemistry ; Bifunctional ; Stereochemistry ; Organic chemistry ; Catalysis ; Organocatalysis Radical Photochemical Reactions ; Catalytic C–H Functionalization Methods ; Catalytic Cross-Coupling Reactions
Authors: Zheng Cao | Chaoyong Liu | Jing Wen | Yunfeng Lu
Source: Advanced Materials (review, 2024-05-31)
Field: Materials Science — Biomaterials

Innovative Formulation Platform: Paving the Way for Superior Protein Therapeutics with Enhanced Efficacy and Broadened Applications Protein therapeutics offer high therapeutic potency and specificity; the broader adoptions and development of protein therapeutics, however, have been constricted by their intrinsic limitations such as inadequate stability, immunogenicity, suboptimal pharmacokinetics and biodistribution, and off-target effects. This review describes a platform technology that formulates individual protein molecules with a thin formulation layer of crosslinked polymers, which confers the protein therapeutics with high activity, enhanced stability, controlled release capability, reduced immunogenicity, improved pharmacokinetics and biodistribution, and ability to cross the blood brain barriers. Based on currently approved protein therapeutics, this formulating platform affords the development of a vast family of superior protein therapeutics with improved efficacy and broadened indications at significantly reduced cost. Materials science ; Nanotechnology Nanoparticle-Based Drug Delivery ; Protein purification and stability ; Monoclonal and Polyclonal Antibodies Research
Authors: Ke Ma | Kezheng Chen | Sheng‐Lin Qiao
Source: The Chemical Record (article, 2024-03-19)
Field: Materials Science — Materials Chemistry

Advances of Layered Double Hydroxide‐Based Materials for Tumor Imaging and Therapy Layered double hydroxides (LDH) are a class of functional anionic clays that typically consist of orthorhombic arrays of metal hydroxides with anions sandwiched between the layers. Due to their unique properties, including high chemical stability, good biocompatibility, controlled drug loading, and enhanced drug bioavailability, LDHs have many potential applications in the medical field. Especially in the fields of bioimaging and tumor therapy. This paper reviews the research progress of LDHs and their nanocomposites in the field of tumor imaging and therapy. First, the structure and advantages of LDH are discussed. Then, several commonly used methods for the preparation of LDH are presented, including co-precipitation, hydrothermal and ion exchange methods. Subsequently, recent advances in layered hydroxides and their nanocomposites for cancer imaging and therapy are highlighted. Finally, based on current research, we summaries the prospects and challenges of layered hydroxides and nanocomposites for cancer diagnosis and therapy. Layered double hydroxides ; Hydroxide ; Materials science ; Nanocomposite ; Cancer therapy ; Biocompatibility ; Nanotechnology ; Ion exchange ; Chemistry ; Cancer ; Ion ; Medicine ; Inorganic chemistry ; Organic chemistry ; Metallurgy ; Internal medicine Layered Double Hydroxides Synthesis and Applications ; Inorganic Chemistry and Materials ; Advanced Photocatalysis Techniques
Authors: Reham A. Mohamed‐Ezzat | Galal H. Elgemeie
Source: BMC Chemistry (article, 2024-03-26)
Field: Chemistry — Organic Chemistry

Novel synthesis of new triazine sulfonamides with antitumor, anti-microbial and anti-SARS-CoV-2 activities Novel approach for synthesizing triazine sulfonamide derivatives is accomplished via reacting the sulfaguanidine derivatives with N-cyanodithioiminocarbonate. Further reaction of the novel triazine sulfonamide analogues with various secondary amines and anilines generated various substituted triazine sulfonamide analogues of promising broad-spectrum activities including anti-microbial, anti-tumor, and anti-viral properties. The in vitro anti-proliferative activities of most of the novel compounds were evaluated on the NCI-60 cell line panel. The antifungal and antibacterial activities of the compounds were also estimated. The anti-viral activity against SARS CoV-2 virus was performed using MTT cytotoxicity assay to evaluate the half-maximal cytotoxic concentration (CC<sub>50</sub>) and inhibitory concentration 50 (IC<sub>50</sub>) of a representative compound from the novel triazine sulfonamide category. Compound 3a demonstrated potent antiviral activity against SARS-CoV-2 with IC<sub>50</sub> = 2.378 µM as compared to the activity of the antiviral drug remdesivir (IC<sub>50</sub> = 10.11 µM). Our results indicate that, upon optimization, these new triazine sulfonamides could potentially serve as novel antiviral drugs. Sulfonamide ; Triazine ; Chemistry ; IC50 ; Cytotoxicity ; Antimicrobial ; Combinatorial chemistry ; In vitro ; 1,3,5-Triazine ; Broad spectrum ; MTT assay ; Drug ; Pharmacology ; Stereochemistry ; Biochemistry ; Biology ; Organic chemistry Synthesis and Characterization of Heterocyclic Compounds ; Quinazolinone synthesis and applications ; Synthesis and Biological Evaluation
Authors: Mengzhen Du | Zihao Xu | Yingru Xue | Fei Li | Jingtao Bi | Jie Liu | Shizhao Wang | Xiaofu Guo | Panpan Zhang | Junsheng Yuan
Source: Molecules (review, 2024-07-02)
Field: Chemistry — Analytical Chemistry

Application Prospect of Ion-Imprinted Polymers in Harmless Treatment of Heavy Metal Wastewater With the rapid development of industry, the discharge of heavy metal-containing wastewater poses a significant threat to aquatic and terrestrial environments as well as human health. This paper provides a brief introduction to the basic principles of ion-imprinted polymer preparation and focuses on the interaction between template ions and functional monomers. We summarized the current research status on typical heavy metal ions, such as Cu(II), Ni(II), Cd(II), Hg(II), Pb(II), and Cr(VI), as well as metalloid metal ions of the As and Sb classes. Furthermore, it discusses recent advances in multi-ion-imprinted polymers. Finally, the paper addresses the challenges faced by ion-imprinted technology and explores its prospects for application. Metal ions in aqueous solution ; Wastewater ; Metalloid ; Heavy metals ; Polymer ; Metal ; Materials science ; Sewage treatment ; Environmental chemistry ; Nanotechnology ; Monomer ; Environmental science ; Chemistry ; Metallurgy ; Environmental engineering ; Composite material Analytical chemistry methods development ; Water Treatment and Disinfection ; Adsorption and biosorption for pollutant removal
Authors: Guanqun Zhu | Zhiyang Liu | Qi Qi | Junfei Xing | Quan Li
Source: Angewandte Chemie International Edition (article, 2024-05-07)
Field: Materials Science — Materials Chemistry

Responsive Organic Fluorescent Aggregates Based on Ion‐π Interactions Away from Fluorescent Conjugated Groups Responsive organic luminescent aggregates have a wide range of application fields, but currently there is still a lack of reasonable molecular design strategies. Introducing ion-π interactions into molecules can effectively alter their luminescent properties. However, current research typically focuses on ion localization at luminescent conjugated groups with the strong interaction forces. In this work, we introduce the flexible alkoxy chain spacers between fluorescent conjugated groups and ion-π interaction sites, and then adjust the fluorescence performance of the molecule by changing the strength of ion-π interactions. Bromine ion-based molecules with strong ion-π interactions exhibit high and stable fluorescence quantum yields in crystals and amorphous powders under the external stimuli. Hexafluorophosphate ion-based molecules with weak ion-π interactions have the high fluorescence quantum yield in crystals and very low fluorescence quantum yield in amorphous powders, showing variable fluorescence intensities under external stimuli. This demonstrates a new class of responsive organic luminescent solid-state materials. Fluorescence ; Conjugated system ; Chemistry ; Ion ; Photochemistry ; Fluorescent labelling ; Organic chemistry ; Polymer Luminescence and Fluorescent Materials ; Molecular Sensors and Ion Detection ; Supramolecular Chemistry and Complexes