jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Veeramani Mangala Gowri | Theelada Panleam | Jayant Giri | Nattapong Srithongkul | Krishnamoorthy Shanmugaraj | Amanullah Fatehmulla | Sirikanjana Thongmee
Source: RSC Advances (article, 2024-01-01)
Field: Chemistry — Organic Chemistry

Beyond templates: exploring uncharted territory in anisotropic gold nanostructure-oligomer composites synthesis and electrocatalytic performance towards environmental pollutants The synthesis of polymer/oligomer-stabilized metal nanostructures (MNS) opens up a wide range of possibilities, from fundamental materials science to practical applications in domains such as medicine, catalysis, sensing, and energy. Because of the versatility of this synthetic approach, it is a dynamic and ever-changing field of study. These polymers/oligomers have precise control over the nucleation and growth kinetics, allowing the production of mono-disperse MNS with well-defined properties. The protective coating provided by polymers or oligomers increased the stability and colloidal dispersity of MNS in these oligomer-MNS composites. As a result, the current research reports the electrocatalytic reduction of nitrobenzene (NB) utilizing oligomeric aminomercaptotriazole (oligo AMTa) and oligo (AMTa-AuNS) modified glassy carbon (GC) electrodes developed <i>via</i> a wet chemical technique. UV-visible spectroscopy, Fourier-transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), high resolution mass spectroscopy (HR-MS), and high-resolution transmission electron microscopy (HR-TEM) approaches were used to confirm the development of oligomer and AuNS. After that, the GC electrode was directly linked to the oligo AMTa and oligo AMTa-AuNS by dipping them in the appropriate solutions. Scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS), and cycle voltammetry (CV) were all employed to confirm the fabrication of oligo AMTa and oligo AMTa-AuNS. Eventually, the electrochemical reduction of NB occurred using the fabricated electrodes. The catalytic activity of oligo AMTa-AuNS has been observed to be more than that of the other modified electrode. As an outcome, the film was employed to determine the sensitivity level of NB, and a limit of detection (LOD) of 2.8 nM was found. The straight-forward method's practical utility was proven by measuring NB in lake sample water. Template ; Nanostructure ; Oligomer ; Materials science ; Nanotechnology ; Colloidal gold ; Polymer chemistry ; Nanoparticle Nanomaterials for catalytic reactions ; Gold and Silver Nanoparticles Synthesis and Applications ; Environmental remediation with nanomaterials
Authors: Hadir Borg | Irene Morales | Dirk Dorfs | Nadja C. Bigall
Source: ChemNanoMat (article, 2024-02-26)
Field: Chemistry — Spectroscopy

Nanoparticle‐Based Cryogels from Colloidal Aqueous Dispersion: Synthesis, Properties and Applications Abstract Cryogels have morphological features that make them interesting for several applications such as catalysis, sensing or tissue engineering. Their interconnected network and open porous structure, build up by primary particles (such as inorganic nanocrystals or polymers), provide these materials with unique physical properties and high specific surface areas. While the library of cryogels is endless, widely used in the polymer chemistry field, in this review we will summarize the structure and properties, applications and challenges of inorganic nanocrystal‐based cryogels obtained by freezing and freeze‐drying an aqueous nanoparticle colloid. This fast, easy and versatile gelation method will be outlined, along with the corresponding macro‐, micro‐ and nano‐structures and gel morphologies that can be obtained, for example, by changing the freezing temperature or by using one nanoparticle system or nanoparticle mixtures. Their applications towards electrocatalysis, photocatalysis and photoelectrochemical sensing will be highlighted, as well as the challenges and prospects of these materials. Colloid ; Nanoparticle ; Dispersion (optics) ; Aqueous solution ; Materials science ; Chemical engineering ; Nanotechnology ; Colloidal particle ; Chemistry ; Organic chemistry ; Optics ; Physics ; Engineering Aerogels and thermal insulation ; Hydrogels: synthesis, properties, applications ; Supramolecular Self-Assembly in Materials
Authors: Daniel A. Corbin | Michael R. Papantonakis | Viet K. Nguyen | Christopher J. Breshike | R. Andrew McGill
Source: Dalton Transactions (article, 2024-01-01)
Field: Chemistry — Inorganic Chemistry

Adsorbents for hydrogen-bond accepting hazardous chemicals by post-synthetic modification of UiO-66-NH<sub>2</sub> Adsorbents for hydrogen-bond accepting chemicals such as organophosphates are developed by post-synthetically modifying UiO-66-NH<sub>2</sub> through two analogous condensation reactions to incorporate hydrogen-bond donating adsorbent groups. When benzaldehydes are employed as coupling partners, the resulting imine-functionalized MOFs show improvements in uptake capacity with increasingly electron-deficient adsorbent groups. By contrast, when the coupling partners are benzoic acids, the resulting amide-functionalized MOFs exhibit improvements in uptake capacity with increasingly electron-rich adsorbent groups. Both modification approaches also increase binding affinity for organophosphates relative to unmodified UiO-66-NH<sub>2</sub>, demonstrating successful modification of the MOF scaffold to create adsorbents for hazardous chemicals. Hazardous waste ; Adsorption ; Hydrogen bond ; Chemistry ; Waste management ; Organic chemistry ; Combinatorial chemistry ; Materials science ; Molecule ; Engineering Radioactive element chemistry and processing ; Metal-Organic Frameworks: Synthesis and Applications ; Chemical Synthesis and Characterization
Authors: Ana M. Gómez | Luis García‐Fernández | Andrés G. Santana | Clara Uriel | Leire Gartzia‐Rivero | Jorge Bañuelos | Inmaculada García‐Moreno | Lourdes Infantes | María Rosa Aguilar | J. Cristobal López
Source: Organic Chemistry Frontiers (article, 2024-01-01)
Field: Materials Science — Materials Chemistry

Chemoselective reaction of methoxyaminomethyl BODIPYs with unprotected carbohydrates: a powerful tool for accessing BODIPY neoglycosides The neoglycosylation of methoxyaminomethyl BODIPYs with unprotected reducing saccharides produces cyclic N -glycosyl- N -methoxy-BODIPY conjugates, which display excellent photophysical characteristics in pure water, even at high dye concentrations. BODIPY ; Chemistry ; Glycosyl ; Photochemistry ; Combinatorial chemistry ; Fluorescence ; Organic chemistry Luminescence and Fluorescent Materials ; Nanoplatforms for cancer theranostics ; Porphyrin and Phthalocyanine Chemistry
Authors: Hongzhi Hu | Ling Xia | Gongke Li | Yi Chen
Source: Journal of Separation Science (review, 2024-08-01)
Field: Chemistry — Organic Chemistry

Recent progress of porous cage materials in sample preparation, chromatographic separation, and detection Porous cage materials with certain dimensions, sizes, shapes, and functions have been regarded as promising materials for sample preparation, chromatographic separation, and detection process. In contrast to infinite frameworks such as metal-organic frameworks or covalent organic frameworks, porous cage materials are constructed from discrete molecules containing at least one internal cavity. The well-defined cavities in porous cage materials provide opportunities for non-covalent interactions. These interactions can be programmed into the ligand design or supramolecular cage constructing using the cages as building blocks, offering various host-guest recognition with great selectivity. In this review, we desire to elucidate the fundamental principles governing the design and fabrication of porous cage materials with well-defined cavities, good solvent processability, and modifiable groups, the applications of these porous cage materials in sample preparation, chromatographic separation, and detection were discussed. The recent advantages of porous cage materials for the analysis process were summarized. We state the potential of these materials and provide an outlook for further application strategies. We expect that this review can inspire interest in the porous cage materials research area for analysis. Cage ; Porosity ; Supramolecular chemistry ; Porous medium ; Nanotechnology ; Materials science ; Covalent bond ; Fabrication ; Cage effect ; Sample preparation ; Selectivity ; Chemistry ; Chromatography ; Molecule ; Organic chemistry ; Composite material ; Engineering Supramolecular Chemistry and Complexes ; Mass Spectrometry Techniques and Applications ; Nanopore and Nanochannel Transport Studies
Authors: Jean-Emile Potaufeux | Romain Tavernier | Jérémy Odent | Jean‐Marie Raquez
Source: Macromolecules (article, 2024-08-13)
Field: Materials Science — Polymers and Plastics

Vitrimer-like Polyampholyte Networks: Toward Elevated Creep Resistance and Fast Dynamic Exchanges Vitrimers represent dynamic polymer networks with unique viscoelastic behavior, combining the best attributes of thermosets and thermoplastics. In this work, we report the concept of polyampholyte physical networks that go far beyond the merits of vitrimer-like materials by combining elevated creep resistance and fast dynamic exchanges. By contrast with most vitrimeric systems requiring out-of-stoichiometric approaches or external catalysts, we simply design polyampholyte physical networks of charge-balanced ionic methacrylates via free radical copolymerization combining poly(ethylene glycol) methyl ether methacrylate (PEGMA). The high ion concentration (i.e., from 33 to 67 mol %) enabled the formation of a physical network containing ionic cross-links acting as both sacrificial and permanent bonds mitigated by the presence of neutral PEGMA. In addition to their vitrimer-like behavior demonstrated using thermomechanical and rheological tools, these physical networks show exceptionally short relaxation times and high creep resistance. Conceptually, these polyampholyte physical networks due to extensive dynamic ion exchange open the door to more circular vitrimer-like systems toward more sustainable plastic materials. Creep ; Materials science ; Ionic bonding ; Methacrylate ; Stress relaxation ; Viscoelasticity ; Relaxation (psychology) ; Rheology ; Ethylene glycol ; Polymer ; Copolymer ; Polymer chemistry ; Composite material ; Ion ; Chemistry ; Organic chemistry Polymer composites and self-healing ; Advanced Polymer Synthesis and Characterization ; Polymer Nanocomposites and Properties
Authors: Archana Sumohan Pillai | Mohamed Achraf Ben Njima | Yasmine Ayadi | Laurent Cattiaux | Ali Ladram | Christophe Piesse | Benoı̂t Baptiste | Jean‐François Gallard | Jean‐Maurice Mallet | Kawthar Bouchemal
Source: International Journal of Pharmaceutics (article, 2024-06-24)
Field: Materials Science — Biomaterials

Cyclodextrin-based supramolecular nanogels decorated with mannose for short peptide encapsulation Nanogel ; Cyclodextrin ; Supramolecular chemistry ; Micelle ; Mannose receptor ; Chemistry ; Aqueous solution ; Mannose ; Alkyl ; Drug delivery ; Polymer ; Self-assembly ; Polymer chemistry ; Materials science ; Chemical engineering ; Molecule ; Organic chemistry Supramolecular Self-Assembly in Materials ; Glycosylation and Glycoproteins Research ; Carbohydrate Chemistry and Synthesis
Authors: Majid Moussaei | Ebrahim Tajik | Vahid Haddadi‐Asl | S Ali Mazloumi | Helia Heydarinasab | Elahe Abdollahi | Fatemeh Haj-Sadeghi | Hanie Ahmadi | Mohammad Reza Gholizadeh
Source: Heliyon (article, 2024-12-20)
Field: Materials Science — Polymers and Plastics

Achieving enhanced stabilization and controlled release of curcumin via cross-linked polydopamine particles Development of efficient drug delivery systems remains a critical challenge in pharmaceutical applications, necessitating novel approaches to improve drug loading and release profiles. In this study, a novel method is presented for fabricating crosslinked polydopamine particles (XPDPs) using a water/water Pickering emulsion system. The emulsion is composed of poly(ethylene glycol) and dextran, stabilized by polydopamine (PDA) particles. This method yields XPDPs with a mean particle size of 0.55 μm, significantly smaller than PDA particles (1.025 μm), resulting in a higher surface area favorable for drug loading. The adsorption mechanism involves electron sharing and covalent bonding between the carrier and drug molecules. The adsorption, release, and drug delivery kinetics of the XPDPs are compared with those of the non-crosslinked PDA particles. The results demonstrate that XPDPs exhibit improved adsorption properties due to their crosslinked structure and increased positive charge due to presence of secondary amines. During a 28-h period, curcumin release from PDA declines from around 80 %-40 %, while for XPDA, it decreases from approximately 60 %-35 % as the pH shifts from 7.4 to 5. While PDA particles display a burst release profile, XPDPs show a more gradual and sustained release, attributed to their enhanced structural stability. Molecular simulations were conducted to estimate the solubility parameters, confirming the compatibility between PDA and dextran for effective drug loading. Curcumin ; Nanotechnology ; Controlled release ; Chemistry ; Materials science ; Chemical engineering ; Engineering ; Biochemistry Dendrimers and Hyperbranched Polymers ; RNA Interference and Gene Delivery ; Electrospun Nanofibers in Biomedical Applications
Authors: Dawit Tesfaye | Jonas Braun | Mamo Gebrezgiabher | Juraj Kuchár | Juraj Černák | Taju Sani | A. Gismelseed | Tim Hochdörffer | Volker Schünemann | Christopher E. Anson | Annie K. Powell | Madhu Thomas
Source: Inorganics (article, 2024-06-03)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Mononuclear Fe(III) Schiff Base Complex with Trans-FeO4N2 Chromophore of o-Aminophenol Origin: Synthesis, Characterisation, Crystal Structure, and Spin State Investigation A new iron(III) complex (Et3NH)2[Fe(L)2](ClO4)·MeOH (1) where H2L = 2-{(E)-[2-hydroxyphenyl)imino]methyl}phenol has been synthesised and characterised by single crystal XRD, elemental analysis and DC magnetic susceptibility measurements. The dianionic ligands L2− coordinate in a tridentate fashion with the Fe(III) through their deprotonated phenolic oxygens and azomethine nitrogen atoms, resulting in a trans-FeO4N2 chromophore. Variable-temperature magnetic measurements were performed between 300 and 5 K under an applied field of 0.1 T and show that 1 is in the high spin state (S = 5/2) over the whole measured temperature range. This is confirmed by Mössbauer spectroscopy at 77 and 300 K. Chromophore ; Deprotonation ; Schiff base ; Chemistry ; Crystallography ; Mössbauer spectroscopy ; Magnetic susceptibility ; Crystal structure ; Phenol ; Single crystal ; Spin states ; Ion ; Inorganic chemistry ; Photochemistry ; Organic chemistry Magnetism in coordination complexes ; Metal complexes synthesis and properties ; Metal-Catalyzed Oxygenation Mechanisms
Authors: Daryl Guthrie | John M. Saathoff | Rajkumar Lalji Sahani | Aline Souza | Daniel W. Cook | Samuel R. Hochstetler | Justina M. Burns | Roudabeh Sadat Moazeni‐Pourasil | Janie Wierzbicki | Saeed Ahmad | G. Michael Laidlaw | B. Frank Gupton | Charles S. Shanahan | Douglas A. Klumpp | limei jin
Source: Organic Process Research & Development (article, 2024-08-01)
Field: Chemistry — Organic Chemistry

Synthetic Process Development of ( <i>R</i> )-(+)-1,2-Epoxy-5-hexene: An Important Chiral Building Block Herein, we describe two practical approaches to synthesize (<i>R</i>)-(+)-1,2-epoxy-5-hexene from inexpensive and readily available raw materials and reagents. The first approach is a two-step sequence, involving an epoxidation with <i>meta</i>-chloroperoxybenzoic acid (mCPBA) and a chiral resolution with (salen)Co(II), producing (<i>R</i>)-(+)-1,2-epoxy-5-hexene in 24-30% overall yield. The second approach utilizes readily available (<i>R</i>)-epichlorohydrin as the starting material and features an epoxide ring-opening reaction with allylMgCl and the NaOH-mediated ring closure reaction. Development of this two-step process affords <i>R</i>-(+)-1,2-epoxy-5-hexene in overall isolated yields of 55-60% with an exceptional purity profile. Both approaches have been successfully demonstrated on 100-200 g scales. 1-Hexene ; Epoxy ; Block (permutation group theory) ; Hexene ; Process development ; Chemistry ; Process (computing) ; Organic chemistry ; Combinatorial chemistry ; Materials science ; Polymer science ; Process engineering ; Computer science ; Mathematics ; Catalysis ; Engineering ; Combinatorics ; Ethylene Asymmetric Synthesis and Catalysis ; Chemical Synthesis and Analysis ; Analytical Chemistry and Chromatography
Authors: K. M. Riyas | S. Sreedevi | Peediyekkal Jayaram | Prasoon Prasannan | C. P. Sona | M. Sabna | Л. С. Хорошко | А. В. Баглов
Source: Journal of Electronic Materials (article, 2024-12-12)
Field: Materials Science — Materials Chemistry

Structural Refinement, Core–Shell Electron Structure, Enhanced Phosphorescence, and Splitting of 5D0 → 7F2 Transitions in Li-doped Rare Earth Oxide Systems Phosphorescence ; Photoluminescence ; X-ray photoelectron spectroscopy ; Valence (chemistry) ; Doping ; Analytical Chemistry (journal) ; Chemistry ; Monoclinic crystal system ; Materials science ; Ion ; Crystal structure ; Crystallography ; Nuclear magnetic resonance ; Fluorescence ; Optics ; Optoelectronics ; Physics Luminescence Properties of Advanced Materials ; Nuclear materials and radiation effects ; Glass properties and applications
Authors: Ali Dhaini | Rama M. Shakaroun | Jérôme Ollivier | Ali Alaaeddine | Sophie M. Guillaume | Jean‐François Carpentier
Source: European Polymer Journal (article, 2024-03-11)
Field: Materials Science — Biomaterials

Phosphorus-containing stereocontrolled polyhydroxyalkanoates by yttrium-mediated ring-opening copolymerization of β-lactones oly(3-hydroxybutyrate) (PHB) polymers functionalized with pendent diphenyl-phosphinate moieties were prepared by the simultaneous ring-opening copolymerization (ROCOP) of racemic or enantiopure β-butyrolactone (rac- or (S)-BPLMe, respectively) with racemic-(4-oxooxetan-2-yl)methyl diphenylphosphinate (rac-BPLOP). The reactions were mediated by yttrium catalysts which tunable ancillary structure enabled preparing copolymers containing syndio-enriched (Pr up to 0.84; Pr is the probability of racemic linkage), atactic (Pr ∼ 0.50) and highly isotactic (Pr < 0.06) poly(BPLMe) (P(BPLMe), aka PHB) segments, starting from rac-BPLMe or (S)-BPLMe, respectively, as assessed by detailed NMR analyses of the copolymer samples. The amount of BPLOP incorporated within the P[(BPLMe)x-co-(BPLOP)y] samples were in line with the initial comonomer loadings (1.8–8.1 mol% vs. 2–10 mol%). The ROCOP was rather well-controlled affording linear α-isopropoxy, ω -crotonyl telechelic and cyclic random copolymers with Mn,NMR up to 15,000 g.mol−1 and ÐM = 1.34–1.95. Detailed MALDI and high-resolution ESI mass spectrometric analyses evidenced the formation of three major series of macromolecules, namely the cyclic one and two linear ones end-capped with an α-isoproxy and either an ω-hydroxy or a ω-crotonate groups; for each of these series, the populations containing y = 0, 1 or 2 BPLOP repeating units were unambiguously distinguished. The thermal characteristics of the P[(BPLMe)x-co-(BPLOP)y] copolymers were investigated by DSC and TGA, revealing in comparison to those of the parent PHB homopolymers, tunable features as a function of their molar mass, tacticity and BPLOP content. Copolymer ; Polymer chemistry ; Enantiopure drug ; Comonomer ; Diastereomer ; Ring-opening polymerization ; Materials science ; Chemistry ; Polymer ; Catalysis ; Organic chemistry ; Enantioselective synthesis biodegradable polymer synthesis and properties ; Carbon dioxide utilization in catalysis ; Synthetic Organic Chemistry Methods
Authors: Lin Yang | Shuang Man | Nengneng Zhao | Jiale Li | Shixuan Bo | Ming Zhang
Source: Journal of Applied Polymer Science (article, 2024-12-25)
Field: Materials Science — Surfaces, Coatings and Films

Hot‐Pressed Polypropylene (PP) Membranes Modified With SiO<sub>2</sub> Nanoparticles for Advanced Emulsified Oil/Water Separation ABSTRACT The separation of oil from water, particularly from emulsions, is a critical environmental challenge. Polypropylene (PP), despite its potential as a membrane material for this purpose, faces limitations due to the large pore size of nonwoven fabrics, which hinders its effectiveness in oil/water separation. This study presents an innovative and cost‐effective approach to enhance PP membranes for emulsified oil/water separation through a combination of hot pressing and surface modification using dopamine (DA) and SiO 2 nanoparticles. The resulting PP‐DA‐SiO 2 membranes demonstrate improved hydrophilicity, with a water contact angle reduced to 26.6° compared to the 133° of the unmodified PP membrane. Moreover, these membranes exhibit exceptional separation performance, achieving a peak emulsion flux of 1382 L · m −2 · h −1 and maintaining a separation efficiency above 98% under gravity. The tensile strength of the modified membrane is also significantly improved, increasing from 2.31 N to 9.01 N. The membrane's antifouling capabilities are also noteworthy, as it retains an emulsion flux of 1032 L · m −2 · h −1 with a 98% separation efficiency after five consecutive cycles. The membrane demonstrates exceptional chemical and mechanical stability following treatments with salt, pH solutions, and rubbing, underscoring its robustness and reliability in various environmental conditions. This work offers a practical and efficient method for fabricating high‐performance oil/water separation membranes, advancing the application potential of PP in environmental remediation technologies. Membrane ; Contact angle ; Materials science ; Chemical engineering ; Emulsion ; Membrane technology ; Polypropylene ; Biofouling ; Composite material ; Chemistry Surface Modification and Superhydrophobicity ; Membrane Separation Technologies ; Advanced Sensor and Energy Harvesting Materials