Exploring Stibanyl Ligand for Accessing Arsinidene and Arsaketene Adducts, and Phosphaketene.

The salt metathesis reaction involving a diamine-based antimony chloride precursor with sodium arsaethynolate in the presence of PMe leads to the formation of stibanyl-functionalized PMe-arsinidene (). Detailed analyses through single-crystal X-ray diffraction and density functional theory of confirm the presence of covalent Sb-As bonds and reveal its polarized nature with a multiple-bond character. In contrast to the formation of complex , substituting PMe with xylyl isocyanide or 1,3-diisopropyl-4,5-dimethyl-imidazolin-2-ylidene () produces an isocyanide-arsinidene adduct () and an -arsaketene complex (), respectively.

Merging Photoinduced Electron Transfer with Hydrogen Atom Transfer: Formal β-C(sp)-H Pyridination of Carbonyls.

In this study, a novel approach that combines photoinduced electron transfer (ET) with hydrogen atom transfer (HAT) has been introduced for the selective β-C(sp)-H pyridination of carbonyl compounds. This method is notable for its absence of transition metals and its ability to function under benign reaction conditions, resulting in a range of pyridinated carbonyl derivatives with consistently moderate to good yields. The significance of this technique is further underscored by its potential for the late-stage functionalization of pharmaceutically significant molecules.

Dimethylacridine based emitters for non-doped organic light-emitting diodes with improved efficiency.

Organic light-emitting diodes (OLEDs) has been attracting much extensive interest owing to their advantages of high-definition and flexible displays. Many advances have been focused on boosting the efficiency and stability. Two innovative dimethylacridine-based emitters,1,1,2,2-tetrakis(4- (2,7-di-tert-butyl-9,9-dimethylacridin-10(9H)-yl)phenyl ethene (AcTPE), and bis(4-(2,7-di-tert-butyl-9,9-dimethylacridin-10(9H)-yl)phenyl)methanone (Ac2BP) were designed and synthesized, in which TPE-baesed AcTPE presents AIE properties, and with the phenyl as spacer between the DMAC and carbony, aryl-ketone-based Ac2BP doesn't show AIE properties due to the absence of restriction of intramolecular rotations.

Facile Design of Highly Stretchable and Conductive Crumpled Graphene/NiS Films for Multifunctional Applications.

The cost-effective and scalable synthesis and patterning of soft nanomaterial composites with improved electrical conductivity and mechanical stretchability remains challenging in wearable devices. This work reports a scalable, low-cost fabrication approach to directly create and pattern crumpled porous graphene/NiS nanocomposites with high mechanical stretchability and electrical conductivity through laser irradiation combined with electrodeposition and a pre-strain strategy. With modulated mechanical stretchability and electrical conductivity, the crumpled graphene/NiS nanocomposite can be readily patterned into target geometries for application in a standalone stretchable sensing platform.

Fabrication of nanocellulose-based high-mechanical and super-hydrophobic xerogels for speedy oil absorbents.

Cellulose-based porous materials are promising for various fields and preferred for sustainable development. However, the low mechanical properties and high hydrophilicity of cellulose-based xerogels had a direct influence on their application in oil absorption. To address the challenge, an environmentally friendly and economical method for synthesizing MTMS/C0.

HCP-to-FCC Phase Transformation of Ruthenium Nanocrystals Selectively Activate Hydrogen Peroxide for Boosting Peroxidase-like Activity.

Due to the simultaneous activation of hydrogen peroxide (HO) and oxygen, Ru nanocrystals exhibit inherent peroxidase- and oxidase-like activities, thereby limiting their extensive application in biosensing. Phase engineering of Ru nanocrystals holds great promise for enhancing catalytic activity and selectivity but remains a challenge. Here, highly active Ru nanocrystals with a metastable face-centered cubic (fcc) structure were successfully synthesized via a facile wet-chemical method followed by an etching step, enabling selective activation of HO and demonstrating promising peroxidase-like activity.

Microfluidics for Nanomedicine Delivery.

Nanomedicine is revolutionizing precision medicine, providing targeted, personalized treatment options. Lipid-based nanomedicines offer distinct benefits including high potency, targeted delivery, extended retention in the body, reduced toxicity, and lower required doses. These characteristics make lipid-based nanoparticles ideal for drug delivery in areas such as gene therapy, cancer treatment, and mRNA vaccines.

Microstructure and properties of joint of Al/Cu welded by resistance element welding with an auxiliary gasket of Ni.

A rivet of aluminum and auxiliary gasket of nickel were adopted to weld A1060 aluminum plate and T2 copper plate using resistance element welding. The interfacial microstructure was analyzed and the tensile shear load of the joint was tested. A layer of AlCu and the eutectic structure of AlCu and (Al) were formed in the interfacial zone of Al/Cu.

LIPUS activated piezoelectric pPLLA/SrSiO composite scaffold promotes osteochondral regeneration through P2RX1 mediated Ca signaling pathway.

Addressing the concurrent repair of cartilage and subchondral bone presents a significant challenge yet is crucial for the effective treatment of severe joint injuries. This study introduces a novel biodegradable composite scaffold, integrating piezoelectric poly-l-lactic acid (pPLLA) with strontium-enriched silicate bioceramic (SrSiO). This innovative scaffold continually releases bioactive Sr and SiO ions while generating an electrical charge under low-intensity pulsed ultrasound (LIPUS) stimulation, a clinically recognized method.

Achieving Superior Thermoelectric Performance in Methoxy-Functionalized MXenes: The Role of Organic Functionalization.

Thermoelectric technology enables the direct and reversible conversion of heat into electrical energy without air pollution. Herein, the stability, electronic structure, and thermoelectric properties of methoxy-functionalized MC(OMe) (M = Sc, Ti, V, Cr, Y, Zr, Nb, Mo, Hf, Ta, and W) were systematically investigated using first-principles calculations and semiclassical Boltzmann transport theory. All MXenes, except those with M = Cr, Mo, and W, can be synthesized by substituting Cl- and Br-functionalized MXenes with deprotonated methanol, with stability governed by the M-O bond strength.

Electride transition in liquid aluminum under high pressure and high temperature.

Despite the conventional view of liquid aluminum (l-Al) as a simple metal governed by the free-electron model, it exhibits unique bonding characteristics. This study uncovers a gradual transition from free electron to electride behavior in l-Al at high pressure and temperature, forming a type of two-component liquid where atomic and electride states coexist. The proportion of electride increases with pressure and temperature until reaching saturation, leading to notable changes in the pair-correlation function and coordination number of l-Al at saturation pressure.

Many-body van der Waals interactions in multilayer structures studied by atomic force microscopy.

Van der Waals interaction in multilayer structures was predicted to be of many-body character, almost in parallel with the establishment of Lifshitz theory. However, the diminishing interaction between layers separated by a finite-thickness intermediate layer prevents experimental verification of the many-body nature. Here we verify the substrate contribution at the adhesion between the atomic force microscopy tip and the supported graphene, by taking advantage of the atomic-scale proximity of two objects separated by graphene.

Synthesis of Polysubstituted Benzo[][1,5]naphthyridine via Mn(III)-Mediated Domino Cascade Reactions of Cyclopropanols and 2-(2-Isocyanophenyl)acetonitriles.

Domino cascade reactions, which can construct multiple bonds in one pot, are efficient methods to synthesize N-heterocycles and other useful skeletons. Herein, we report an expedient synthesis of polysubstituted benzo[][1,5]naphthyridine via Mn(III)-mediated C-C bond cleavage of cyclopropanols. These reactions were initiated by addition of β-carbonyl radicals, generated from cyclopropyl alcohols in the presence of Mn(III), to 2-(2-isocyanophenyl)acetonitriles to give quinolin-3-amines, which went through intramolecular cyclizations and dehydrogenation to give the final products.

Succinate Nanomaterials Boost Tumor Immunotherapy via Activating Cell Pyroptosis and Enhancing MHC-I Expression.

Despite the promising clinical applications of immunotherapy, its effectiveness is often limited by low immune responses and tumor immune escape. In this study, we introduce a simple and drug-free inorganic nanomaterial, sodium succinate (CHNaO NPs), prepared using a rapid microemulsion method to enhance cancer immunotherapy. The synthesized CHNaO NPs can release high concentrations of Na and succinate ions into tumor cells, leading to an increase in intracellular osmolarity.

Magnetic Field-Driven NiCo-3DOMC Modified Separators for Effective Lithium Polysulfide Mitigation and Catalysis.

Lithium-sulfur batteries (LSBs) face challenges from the shuttle effect of lithium polysulfides (LiPSs) and slow redox kinetics. In this study, a NiCo-Doped 3D Ordered Mesoporous Carbon (NiCo-3DOMC) composite material is synthesized using a gel-crystalline template and sol-gel method to modify polypropylene separators in LSBs. Density Functional Theory calculations and experiment results demonstrate that under a magnetic field, the NiCo-3DOMC enhances adsorption and catalyzes the conversion of LiPSs, effectively mitigating the shuttle effect and boosting redox kinetics.

A new classification algorithm for low concentration slurry based on machine vision.

Machine vision was utilized in this study to accurately classify the low concentration slurry. Orthogonal experiment L(3) indicated that the optimal coal slurry collection images were achieved with exposure value of 10, slurry layer thickness of 7 cm, and light intensity of 5 × 10 lux. Subsequently, a new low concentration classification model was systematically developed, encompassing aspects such as original image acquisition, data augmentation, dataset partitioning, classification algorithm design, and model evaluation.

Maintaining hexagonal structures through interfacial positioning of crosslinkers for nanofiltration.

Hypothesis: Optimizing interfacial positioning of crosslinkers within a reactive self-assembled hexagonal lyotropic liquid crystals (HLLC) system could assist in retaining the hexagonal structure during polymerization and thereby improving water filtration performances of the as-synthesized nanofiltration membranes.

Experiments: The positioning of the hydrophilic crosslinker, poly (ethylene glycol) diacrylate (PEGDA), within the reactive HLLC system was systematically investigated using H and C solid nuclear magnetic resonance (NMR) and small angle X-ray scattering (SAXS) techniques. The structural variation and water filtration performances of these HLLC systems with/without crosslinkers after polymerization were further studied using grazing incidence SAXS (GISAXS) and crossflow filtration tests, respectively.

Recent Advances of Cellulose-Based Hydrogels Combined with Natural Colorants in Smart Food Packaging.

Due to the frequent occurrence of food safety problems in recent years, healthy diets are gradually receiving worldwide attention. Chemical pigments are used in smart food packaging because of their bright colors and high visibility. However, due to shortcomings such as carcinogenicity, people are gradually looking for natural pigments to be applied in the field of smart food packaging.

Iron-Photocatalyzed Decarboxylative Alkylation of Carboxylic Acids with Morita-Baylis-Hillman Acetates.

We present an iron-photocatalyzed decarboxylative alkylation strategy involving carboxylic acids and Morita-Baylis-Hillman (MBH) acetates to synthesize -type tri- and tetrasubstituted alkenes with moderate to excellent stereoselectivity (/ ratio up to >19:1). This method is applicable to a broad range of structurally diverse primary, secondary, and tertiary alkyl carboxylic acids, as well as complex pharmaceutical and natural carboxylic acids, achieving efficient alkylation of various MBH acetates under mild conditions (>60 examples, with yields up to 96%). This approach offers a powerful strategy for streamlined alkylation.

Injectable dual-network hyaluronic acid nanocomposite hydrogel for prevention of postoperative breast cancer recurrence and wound healing.

High locoregional recurrence rates and potential wound infections remain a significant challenge for postoperative breast cancer patients. Herein, we developed a dual-network hyaluronic acid (HA) nanocomposite hydrogel composed of herring sperm DNA (hsDNA) bridged methacrylated HA (HAMA) and FeMg-LDH-ppsa nanohybrid chelated catechol-modified HA (HADA) for the prevention of breast cancer recurrent, anti-infection, and promoting wound healing. Dynamic reversible hsDNA cross-linking combined with metal-catechol chelating renders the hydrogel injectability, rapid self-healing ability, and enhanced mechanical properties.

Lignin nanoparticle/MXene-based conductive hydrogel with mechanical robustness and strain-sensitivity property via rapid self-gelation process towards flexible sensor.

Conductive hydrogels have been showcased with substantial potential for soft wearable devices. However, the tedious preparation process and poor trade-off among overall properties, i.e.

Design and Fabrication of a Patch Antenna for 5G Wireless Communications from a Low-Permittivity LiAlSiO-Based Ceramic.

A microwave dielectric ceramic based on lithium aluminum silicate (LiAlSiO) with ultralow permittivity was synthesized using the traditional solid-state reaction technique, and its dielectric characteristics at microwave frequencies are presented. The nominal LiAlSiO ceramic exhibited a relative permittivity of 3.95.

One-Step Process for the Regiodivergent Double Hydrocyanation of 1,3-Butadiene.

In industry, the two important nitrile starting materials, adiponitrile and 2-methylglutaronitrile, are primarily manufactured through the well-known DuPont process, which consists of a tandem sequence including first hydrocyanation, isomerization and second hydrocyanation. However, this mature process has the intrinsic defects of step efficiency and regioselectivity. Herein, we report a nickel-catalyzed divergent, one-step double hydrocyanation of 1,3-butadiene to produce either adiponitrile or 2-methylglutaronitrile in high regioselectivity.