Publications by authors named "Xinglong Zhang"

Carbon dots are emerging luminescent nanomaterials that have drawn considerable attention due to their abundance, environmental friendliness, and customizable optical properties. However, their susceptibility to temperature-induced vibrational exciton changes and the tendency to thermal quenching of emission have hindered their practical applications. Here, a method is reported for achieving high-temperature photoluminescence carbonized polymer dots (CPDs) through a bi-confinement approach that involves a highly cross-linked polymer network and a rigid AlO matrix.

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The surface acidity and electron transfer performance of manganese oxide catalysts significantly affected its performance of peroxymonosulfate (PMS) activation. In this work, MnO catalyst was prepared by the precipitation method. The C-hybridization MnO (MnO-D) catalyst prepared with disodium oxalate as a precipitant had more Mn and Lewis acid sites on the surface, promoting the binding of PMS on the catalyst surface, which exhibited the best performance in inducing PMS activation to degrade bisphenol A (BPA).

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Moiré superlattices, arising from the periodic Moiré patterns formed by two-dimensional (2D) materials stacked with a slight lattice mismatch, have attracted significant attention due to their unique electronic and optical performances. This review provides an overview of recent advances in Moiré superlattices, highlighting their formation mechanisms, structural characteristics, and emergent phenomena. First, we discuss the theoretical basis and experimental techniques employed in fabricating Moiré superlattices.

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Here, we present the first instance of a highly efficient red tetramer aggregate with tunable emission based on a cationic platinum(II) complex in conjunction with a silver cluster anion counterpart. This system exhibits multicolor emission response behaviors, which can be conveniently and directly detected through spectroscopic analysis, showcasing intriguing luminescence changes. The self-assembly of Pt⋯, π-π, and hydrogen bonding interactions not only enables an intriguing color adjustment from green to yellow emission, and eventually to red emission, but also demonstrates the co-existence of the monomer, excimer, and aggregation.

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Background: Lung cancer is the most common cancer and a leading cause of cancer-related deaths globally. The aim of this study was to evaluate the incidence and mortality of lung cancer worldwide in 2022 and to project the number of new cases and deaths due to lung cancer in China and the United States in 2050.

Methods: In this study, data from the GLOBCAN 2022 database were used to analyze lung cancer incidence and mortality.

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Article Synopsis
  • Pneumatic systems in industrial settings consume a significant amount of energy but often operate with low efficiency due to slow actuator response times.
  • The paper proposes a new method using a three-voltage acceleration waveform and a backstepping sliding mode controller (BSMC) to improve the accuracy and energy efficiency of these systems.
  • Test results indicate that the BSMC saves 26.27% in air consumption and 32.35% in valve power consumption, while also achieving a low root-mean-square error (RMSE) of 4.8421 kPa, demonstrating enhanced energy utilization and precision.
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A new method is introduced for the swift and precise detection of soil pollution and its effects on crops. Soil quality is essential for human well-being, with heavy metal pollution presenting considerable risks to both the ecological environment and human health. In crops, heavy metal contamination primarily occurs through mediums such as soil and water sources.

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Stereoselective synthesis utilizing small-molecule catalysts, particularly N-heterocyclic carbene (NHC), has facilitated swift access to enantioenriched molecules through diverse activation modes and NHC-bound reactive intermediates. While carbonyl derivatives, imines, and "activated" alkenes have been extensively investigated, the exploration of heteroatom-centered analogues of NHC-bound intermediates has long been neglected, despite the significant potential for novel chemical transformations they offer once recognized. Herein, we disclose a carbene-catalyzed new activation mode by generating unique sulfinyl azolium intermediates from carbene nucleophilic addition to in situ-generated mixed sulfinic anhydride intermediates.

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Article Synopsis
  • Mechanochemistry explores how mechanical force influences chemical bonds, opening pathways for creating various materials like alloys, ceramics, and biomaterials.
  • A new wedging technique inspired by splitting wood is proposed to effectively manipulate crystal frameworks at the micro-scale, allowing for targeted bond-breaking.
  • This innovative approach has successfully produced different types of nanosheets and is expected to enhance the versatility and applicability of mechanochemistry in material preparation.
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Metal-organic frameworks (MOFs) have been widely considered as ideal platforms for the preparation of biomimetic catalysts, but it remains challenging to fabricate MOF-based enzyme-like catalysts with optimal activity. Here, we leverage the inherent flexibility of MOFs and propose a novel trans-functionalization strategy to construct a carbonic anhydrase (CA) mimic by the structural transformation from ZIF-L to ZIF-8. Theoretical and experimental results reveal that during the structural transformation, the hydroxyl group will preferentially coordinate with the interlayer Zn clusters to form the CA-like active center Zn-N-OH.

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With the development of artificial intelligence systems, it is necessary to develop optoelectronic devices with photoresponse and storage capacity to simulate human visual perception systems. The key to an artificial visual perception system is to integrate components with both sensing and storage capabilities of illumination information. Although module integration components have made useful progress, they still face challenges such as multispectral response and high energy consumption.

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Background: The purpose of this study is to determine the variations in the prevalence of self-reported asthma among the adult population in the United States of America (USA), analyzing demographic characteristics, physical indicators, living habits, and sarcopenia.

Methods: 10,566 participants from the 2009 to 2018 National Health and Nutrition Examination Survey (NHANES) of the USA who were 20 years of age or older and not pregnant were included in the study.

Results: The prevalence of patients with asthma varies by age, gender, and race.

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Aminoarenes are important molecules for broad applications in nearly all modern industries that involve chemicals. Direct and site-selective C-H bond amination of arenes provides the most efficient and convenient method to prepare aminoarenes. A main challenge is to selectively install the amino group (or other functional groups) to the distal para-carbon of arenes (especially multi-substituted arenes) during the C-H bond functionalization events.

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Thermoset polymers have become integral to our daily lives due to their exceptional durability, making them feasible for a myriad of applications; however, this ubiquity also raises serious environmental concerns. Covalent adaptable networks (CANs) with dynamic covalent linkages that impart efficient reprocessability and recyclability to thermosets have garnered increasing attention. While various dynamic exchange reactions have been explored in CANs, many rely on the stimuli of active nucleophilic groups and/or catalysts, introducing performance instability and escalating the initial investment.

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Catalytic cross-coupling by transition metals has revolutionized the formation of C-C bonds in organic synthesis. However, the challenge of forming multiple alkyl-alkyl bonds in crowded environments remains largely unresolved. Here, we report the regioselective functionalization of olefins with sp-hybridized organohalides and organozinc reagents using a simple (terpyridine)iron catalyst.

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Background: Plant-derived extracellular vesicles (PDEs) are expected to be a compelling alternative for cancer treatment due to their low cytotoxicity, low immunogenicity, high yield, and potential anti-tumor efficacy. Despite the significant advantages of PDEs, the reliable evidence for PDEs as promising anti-tumor approach remains unsystematic and insufficient. Some challenges remain for the clinical application and large-scale industrial production of PDEs.

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The control of noncarbon stereogenic centers is of profound importance owing to their enormous interest in bioactive compounds and chiral catalyst or ligand design for enantioselective synthesis. Despite various elegant approaches have been achieved for construction of S-, P-, Si- and B-stereocenters over the past decades, the catalyst-controlled strategies to govern the formation of N-stereogenic compounds have garnered less attention. Here, we disclose the first organocatalytic approach for efficient access to a wide range of nitrogen-stereogenic compounds through a desymmetrization approach.

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In SARS-CoV-2 infection, it has been observed that viral replication lasts longer in the nasal mucosa than in the lungs, despite the presence of a high viral load at both sites. In hamsters, we found that the nasal mucosa exhibited a mild inflammatory response and minimal pathological injuries, whereas the lungs displayed a significant inflammatory response and severe injuries. The underlying cellular events may be induced by viral infection in three types of cell death: apoptosis, pyroptosis, and necroptosis.

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Article Synopsis
  • * The technique combines thermal treatment to weaken certain bonds and liquid nitrogen exfoliation to enhance layer separation, resulting in nanosheets less than 10 nm thick.
  • * The resulting MOF nanosheets show improved catalytic performance in oxygen evolution reactions due to their ultrathin nature, which enhances charge transfer and exposes more active sites.
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Objective: Glucocorticoid (GC) overuse is strongly associated with steroid-induced osteonecrosis of the femoral head (SINFH). However, the underlying mechanism of SINFH remains unclear. This study aims to investigate the effect of dexamethasone (Dex)-induced oxidative stress on osteocyte apoptosis and the underlying mechanisms.

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Noncrystalline zeolitic imidazolate frameworks (ZIFs) tethered with ionic liquids (ILs) were successfully employed as catalysts for mild CO conversion into cyclic carbonates for the first time. Notably, noncrystalline ZIFs exhibit outstanding catalytic performance in terms of activity, stability, and substrate suitability. was obtained through the simultaneous incorporation of a boronic acid group and ILs into its ZIF framework and exhibited a superior catalytic activity.

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Patients with COVID-19 have been reported to experience neurological complications, although the main cause of death in these patients was determined to be lung damage. Notably, SARS-CoV-2-induced pathological injuries in brains with a viral presence were also found in all fatal animal cases. Thus, an appropriate animal model that mimics severe infections in the lungs and brain needs to be developed.

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The development of an efficient method for the synthesis of C4 oxy-substituted indoles is an appealing yet challenging task. Herein, we report a general palladium-catalyzed TDG approach for the direct C4-H acyloxylation of indoles. The protocol features atom and step economy, excellent regioselectivity, and good tolerance of functional groups.

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Article Synopsis
  • Pd/C catalysts are valuable for the debenzylation process but face challenges like agglomeration and loss of active components, leading to reduced effectiveness.
  • A new method using microwave discharge to create Pd/C catalysts on porous carbon hollow spheres allows for better distribution and smaller size of Pd nanoparticles, enhancing their performance.
  • The mesopores in the carbon structure help keep the Pd nanoparticles in place, resulting in a stable and high-activity catalyst for the debenzylation reaction.
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