Myelin Sheath-Inspired Hydrogel Electrode for Artificial Skin and Physiological Monitoring.

Significant advancements in hydrogel-based epidermal electrodes have been made in recent years. However, inherent limitations, such as adaptability, adhesion, and conductivity, have presented challenges, thereby limiting the sensitivity, signal-to-noise ratio (SNR), and stability of the physiological-electrode interface. In this study, we propose the concept of myelin sheath-inspired hydrogel epidermal electronics by incorporating numerous interpenetrating core-sheath-structured conductive nanofibers within a physically cross-linked polyelectrolyte network.

An Efficient Boron Source Activation Strategy for the Low-Temperature Synthesis of Boron Nitride Nanotubes.

Lowering the synthesis temperature of boron nitride nanotubes (BNNTs) is crucial for their development. The primary reason for adopting a high temperature is to enable the effective activation of high-melting-point solid boron. In this study, we developed a novel approach for efficiently activating boron by introducing alkali metal compounds into the conventional MgO-B system.

A new synthesis of indolo[2,3-]quinolines from 3-acetyl--alkyl-2-chloroindoles with 2-aminobenzophenone.

A new synthesis of -alkyl- and 11-phenyl-modified indolo[2,3-]quinolines was achieved PEG-400-promoted and visible light-induced one-step reaction of 3-acetyl--alkyl-2-chloroindoles with 2-aminobenzophenone in 40% methanol aqueous solution. The merits of the protocol include cost efficiency, convenience, and eco- and user-friendliness.

Expression of concern: Direct C-S bond formation C-O bond activation of phenols in a crossover Pd/Cu dual-metal catalysis system.

Expression of concern for 'Direct C-S bond formation C-O bond activation of phenols in a crossover Pd/Cu dual-metal catalysis system' by Vahid Khakyzadeh , , 2019, , 4491-4497, https://doi.org/10.1039/C9OB00313D.

Ni Cluster-Decorated Single-Atom Catalysts Achieve Near-Unity CO-to-CO Conversion with an Ultrawide Potential Window of ≈1.7 V.

Developing efficient electrocatalysts for CO reduction to CO within a broad potential range is meaningful for cascade application integration. In this work, hydrogen spillover is created and utilized to cultivate a proton-rich environment via the simple thermolysis of a Ni-doped Zn coordination polymer (Zn CPs (Ni)) to create asymmetric Ni single atoms co-located with adjacent Ni nanoclusters on nitrogen-doped carbon, termed as Ni/N-C, which expedites the hydrogenation of adsorbed CO. Therefore, the sample demonstrates near-unity CO-to-CO conversion efficiency under pH-universal conditions in ultra-wide potential windows: -0.

Deciphering the Degradation Mechanism Induced by the Air-Exposure in LiNiO and the Recovery Strategy.

Cathode prelithium agent is regarded as the most applicable approach to compensate the initial capacity loss in lithium ion batteries (LIBs). LiNiO (LNO) has attracted numerous attention due to its superior environmental stability and reliable synthesis approach. To promote the commercial application of LNO, the understanding of the degradation mechanism induced by air-exposure and finding reliable strategies to improve the air stability are necessary.

Hofmeister effect driven dynamic-bond cross-linked dialdehyde xylan hydrogels with rapid response and robust mechanical properties for expanding stent.

The biomedical field urgently needs for programmable stent materials with nontoxic, autonomous self-healing, injectability, and suitable mechanical strength, especially self-expanding characteristics. However, such materials are still lacking. Herein, based on gelatin and dialdehyde-functionalized xylan, we synthesized 3D-printable, autonomous, self-healing, and mechanically robust hydrogels with a reversible Schiff base crosslink network.

Synchronously Consolidating Li, Se, S, and C for Robust Li-SeS Batteries.

S-redox involving solvated polysulfides is accompanied by volumetric change and structural decay of the S-based cathodes. Here, we propose a synchronous construction strategy for consolidating Li, Se, S, and C elements within a composite cathode via a paradigm reaction of 8Li+2Se+CS = 2LiSeS+C. The obtained composite features crystalline LiSeS encapsulated in a carbon nanocage (LiSeS@C), exhibiting ultrahigh electrical conductivity, ultralow activation barrier, and excellent structural integrity, accordingly enabling large specific capacity (615 mAh g) and high capacity retention (87.

Construction of bismuth based MOF for efficient removal of sodium diclofenac via adsorption and photocatalysis.

The mass production and widespread use of Pharmaceuticals and Personal Care Products (PPCPs) have posed a serious threat to the water environment and public health. In this work, a green metal-based Metal Organic Framework (MOF) Bi-NH-BDC was prepared and characterized, and the adsorption characteristics of Bi-NH-BDC were investigated with typical PPCPs-diclofenac sodium (DCF). It was found that DCF mainly covered the adsorbent surface as a single molecular layer, the adsorption reaction was a spontaneous, entropy-increasing exothermic process and the adsorption mechanisms between Bi-NH-BDC and DCF were hydrogen bonding, π-π interactions and electrostatic interactions.

Coating FeO quantum dots with glutamic acid to achieve enhanced catalysis for facile and sensitive detection of chromium(VI) in water.

A universal green synthesis approach for Glu-FeO quantum dots (QDs) with ultrasmall size (∼3.3 nm) and enhanced catalysis was demonstrated using glutamic acid (Glu) as a dopant. Abundant carboxylic groups and amino groups on the surfaces with a zeta potential of -6.

Syntheses and performance study of three POM-viologen compounds with photo- and electric-stimulation response.

In recent years, stimulus responsive materials have received widespread attention. Under solvothermal conditions, three polyoxometalates-viologen organic-inorganic hybrid compounds were successfully constructed by combining a viologen ligand 1-(3-Nitro-benzyl)-[4,4']bipyridinyl-1-ium bromide (1,3-nibipy·Br) with octamolybdate, namely [Cu(1,3-nibipy)(HO)(β-MoO)]·2HO (1), [Cu(1,3-nibipy)(HO)(β-MoO)]·(β-MoO) (2) and (1,3-Hnibipy)·(β-MoO) (3). These three compounds can exhibit color changing properties under both light and electrical stimulation.

A LMOF/MIP paper-based chip and analysis of tetracycline in foodstuff with sample-to-answer performance.

The development of high-performance specific sensors is promising for the rapid detection of harmful residues in animal-derived foods. Recently, luminescent metal-organic framework/molecularly imprinted polymer (LMOF/MIP) materials have been developed as ideal candidates for the analysis of harmful residues. Here, we reported a simple fabrication protocol of paper-based chip through in-situ growth of LMOF on a negatively charged modified filter paper, a paper-based molecularly imprinting layer (FP@BA-Eu@MIP) was thereafter successfully prepared via the boronate affinity-based controllable oriented surface imprinting strategy.

An MXene-supported NHCNT and BiOCl composite as a sulfur reservoir for Li-S batteries with high energy density.

To solve the intractable challenges of Li-S batteries, we synthesized MXene-NHCNT-BiOCl- to be used as a sulfur host. The M-N-B-10%-S electrode exhibited superior electrochemical performance. XRD measurement confirmed that the M-N-B-10%-S electrode displayed good cycle stability.

Benzvalene-like Carboranes: Genuine Rule Breakers and Good Kinetic Stability.

Substituents are widespread in chemistry, but it has remained quite difficult to reliably determine the thermodynamic and kinetic stabilities of substituted compounds, though they are key to helping establish a structural rule and synthetic viability, respectively. As an important class of valence isomers in the benzene family, benzvalene-like structures have been extensively studied in systems associated with electron-neutral (i.e.

Pre-carbonized nickel-metal organic frameworks to enable lithium-sulfur reactions.

Metal-organic frameworks, a type of porous architecture, have caught wide attention for their pore-rich and special metal-active centres. However, the non-conductive MOFs show limitations in lithium-sulfur batteries (LSBs). Herein, we first synthesized a lamellar nickel-based MOF and subsequently conducted pre-carbonization to attain a conductive Ni-carbon (Ni@C) catalyst.

Large-Scale Atomic Strain Defects on Palladium Surfaces for Enhanced Oxygen Reduction and Zinc-Air Batteries.

Designing nano-electrocatalysts rich in surface defects is critical to improve their catalytic performance. However, prevailing synthesis techniques rely heavily on complex procedures that compromise defect extensiveness and uniformity, casting a high demand for methods capable of synthesizing large-scale crystalline defects. An innovative design strategy is herein proposed that induces ample strain/dislocation defects during the growth of palladium (Pd), which is well-known as a good oxygen reduction reaction (ORR) catalyst.

Lycopene detection in cherry tomatoes with feature enhancement and data fusion.

Lycopene, a biologically active phytochemical with health benefits, is a key quality indicator for cherry tomatoes. While ultraviolet/visible/near-infrared (UV/Vis/NIR) spectroscopy holds promise for large-scale online lycopene detection, capturing its characteristic signals is challenging due to the low lycopene concentration in cherry tomatoes. This study improved the prediction accuracy of lycopene by supplementing spectral data with image information through spectral feature enhancement and spectra-image fusion.

Perfluoroalkyl-modified covalent organic frameworks for continuous photocatalytic hydrogen peroxide synthesis and extraction in a biphasic fluid system.

HO photosynthesis represents an appealing approach for sustainable and decentralized HO production. Unfortunately, current reactions are mostly carried out in laboratory-scale single-phase batch reactors, which have a limited HO production rate (<100 μmol h) and cannot operate in an uninterrupted manner. Herein, we propose continuous HO photosynthesis and extraction in a biphasic fluid system.

Bimetallic Coupling Strategy Modulating Electronic Construction to Accelerate Sulfur Redox Reaction Kinetics for High-Energy Flexible Li-S Batteries.

Lithium-sulfur (Li-S) batteries are considered the most promising energy storage battery due to their low cost and high theoretical energy density. However, the low utilization rate of sulfur and slow redox kinetics have seriously limited the development of Li-S batteries. Herein, the electronic state modulation of metal selenides induced by the bi-metallic coupling strategy is reported to enhance the redox reaction kinetics and sulfur utilization, thereby improving the electrochemical performance of Li-S batteries.

A novel fluorescence platform for portable and visual monitoring of meat freshness.

Biogenic amines (BAs) are crucial markers of meat spoilage. Developing practical and effective BAs detection methods is essential for monitoring meat freshness and ensuring daily consumption safety. This study prepared several naphthalene-based fluorescent compounds to visually monitor meat freshness in real-time.

Pd-Catalyzed Deacylative [4 + 1] Annulation of -Arylimidoyl Chlorides with β-Keto Esters Leading to 2-Fluoroalkyl Indoles.

A palladium-catalyzed [4 + 1] annulation of -arylimidoyl chlorides with β-keto esters has been developed. In the presence of Pd(OAc), PCy, and KPO, a variety of fluoalkyl-containing -arylimidoyl chlorides smoothly underwent the cascade C-H imidoylation/deacylative Heck-type reactions to afford biologically important 2-fluoroalkyl indoles in moderate to good yields.