A5100656414- Surface Chemistry and Catalysis
- Molecular Junctions and Nanostructures
- Covalent Organic Framework Applications
- Electrochemical Analysis and Applications
- Graphene research and applications
- Metal-Organic Frameworks: Synthesis and Applications
- Asymmetric Synthesis and Catalysis
- Surface and Thin Film Phenomena
- Electrocatalysts for Energy Conversion
- Supramolecular Self-Assembly in Materials
- Force Microscopy Techniques and Applications
- Porphyrin and Phthalocyanine Chemistry
- Luminescence and Fluorescent Materials
- Advanced Photocatalysis Techniques
- Conducting polymers and applications
- Advancements in Battery Materials
- Crystallization and Solubility Studies
- Advanced Battery Materials and Technologies
- Perovskite Materials and Applications
- Chemical Synthesis and Reactions
- Particle Accelerators and Free-Electron Lasers
- Catalytic C–H Functionalization Methods
- Spectroscopy and Quantum Chemical Studies
- Advanced X-ray Imaging Techniques
- X-ray Diffraction in Crystallography
Beijing National Laboratory for Molecular Sciences
2016-2025
Chinese Academy of Sciences
2016-2025
Institute of Chemistry
2016-2025
University of Chinese Academy of Sciences
2016-2025
Hainan University
2021-2025
Sanya University
2025
Shanghai University
2011-2024
Shaoxing University
2020-2024
Hunan University of Technology
2024
Shanghai Advanced Research Institute
2021-2024
Forced obedience: Layer-structured montmorillonite (MMT) was used as a nanoreactor for the generation of planar pyridinic and pyrrolic N sites in nitrogen-doped graphene (NG; see picture). The selectivity formation inversely proportional to interspace width (δ) MMT reached maximum 90.27 %. NG catalyst exhibited low electrical resistance, high electrocatalytic activity, good stability. development high-performance low-cost catalytic materials oxygen reduction reaction (ORR) has been major...
Surface covalent organic frameworks (SCOFs), featured by atomic thick sheet with covalently bonded building units, are promised to possess unique properties associated reduced dimensionality, well-defined in-plane structure, and tunable functionality. Although a great deal of effort has been made obtain SCOFs different linkages blocks via both "top-down" exfoliation "bottom-up" surface synthesis approaches, the obtained generally suffer low crystallinity, which impedes understanding...
We report the metal-catalyst-free synthesis of high-quality polycrystalline graphene on dielectric substrates [silicon dioxide (SiO(2)) or quartz] using an oxygen-aided chemical vapor deposition (CVD) process. The growth was carried out a CVD system at atmospheric pressure. After high-temperature activation in air, is subsequently grown SiO(2) by utilizing oxygen-based nucleation sites. mechanism analogous to that for single-walled carbon nanotubes. Graphene-modified can be directly used...
Exfoliated black phosphorus (BP), as a monolayer or few-layer material, has attracted tremendous attention owing to its unique physical properties for applications ranging from optoelectronics photocatalytic hydrogen production. Approaching intrinsic been, however, challenged by chemical reactions and structure degradation of BP under ambient conditions. Surface passivation capping agents been proposed extend the processing time window, yet contamination damage rise challenges applications....
The confined synthesis of two-dimensional covalent organic framework (2D COF) thin films was developed by using superspreading water on the hydrogel immersed under oil as reactor. Through loading two monomers into and hydrogel, respectively, COF are synthesized at oil/water/hydrogel interface. This strategy provides a new way for freestanding 2D films. Detailed characterizations reveal homogeneous topography, large area, controllable thickness from 4 to 150 nm, crystallinity with certain...
Two‐dimensional (2D) nanomaterials, such as graphene and transition metal chalcogenides, show many interesting dimension‐related materials properties. Inspired by the development of 2D inorganic single‐layered covalent organic frameworks (sCOFs), featuring atom‐thick sheets crystalline extended structures with covalently bonded building blocks, have attracted great attention in recent years. With their unique graphene‐like topological structure merit structural diversity, sCOFs promise to...
Schichtförmiger Montmorillonit (MMT) wurde als Nanoreaktor für die Erzeugung von planaren pyridinischen und pyrrolischen N-Zentren in N-dotiertem Graphen (NG) verwendet (siehe Bild). Die Selektivität Bildung der war umgekehrt proportional zum Schichtabstand (δ) des MMT erreicht ein Maximum 90.27 %. Der NG-Katalysator zeichnet sich durch einen niedrigen elektrischen Widerstand, hohe elektrokatalytische Aktivität gute Stabilität aus. As a service to our authors and readers, this journal...
The electrochromic property and device construction of a triphenylamine-based oriented two-dimensional covalent organic framework (2D COF) film on indium tin oxide (ITO) coated glass was reported. characterization the 2D COF3PA-TT revealed that uniform, with good crystallinity, its plane parallel to substrate. For first time, properties were studied. ITO exhibited reversible color transition between deep red dark brown during redox process. Spectroelectrochemical experiments changes in...
Periodically eclipsed π-stacking columns in two-dimensional covalent organic frameworks (2D COFs) could function as direct channel paths for charge carrier transport. Incorporating a well-defined 2D COF into electronic devices, however, is still challenge. Herein, we have reported the solvothermal synthesis of COFTFPy-PPDA film on single-layer graphene (SLG), which was constructed via imine-type linkage by employing 1,3,6,8-tetrakis(p- formylphenyl)pyrene (TFPy) and p-phenylenediamine (PPDA)...
Grain boundaries (GBs) play an important role in organic–inorganic halide perovskite solar cells, which have generally been recognized as a new class of materials for photovoltaic applications. To definitely understand the electrical structure and behavior GBs, here we present Kelvin probe force microscopy conductive atomic (c-AFM) measurements both typical inverted planar organolead cells. By comparing contact potential difference (CPD) these two devices dark under illumination, found that...
Chemically stable chromenoquinoline (CQ)-based covalent organic frameworks (COFs) were constructed by postsynthetic conversion of imine COFs. The key step an intramolecular Povarov reaction can transform a preintegrated alkyne group to bridge the benzene rings on both sides linkage via chemical bonds, affording ladder-type CQ linkage. This novel approach achieves high cyclization degree 80-90%, which endows CQ-COFs with excellent stability toward strong acid, base, and redox reagents....
The construction of well-ordered 2D covalent networks via the dehydration di-borate aromatic molecules was successfully realized through introducing a small amount water into closed reaction system to regulate chemical equilibrium.
To examine whether exposure to the Chinese famine during fetal life and early childhood is associated with risks of metabolic syndrome this association modified by later environment.We used data 7,874 adults born between 1954 1964 from 2002 China National Nutrition Health Survey. Famine groups were defined as nonexposed; exposed; childhood, midchildhood, or late exposed. Excess death rate was determine severity famine. The ATP III criteria for definition (three more following variables:...
Highly ordered 2D COFTTA-DHTA was synthesized on amino-functionalized MWCNTs with high crystallinity, regular pore structures and chemical stability. Coupled the improved electrical conductivity in presence of MWCNT skeletons, NH2-f-MWCNT@COFTTA-DHTA showed electrochemical performance as a capacitive electrode material.
Understanding the chirality induction and amplification processes, construction of globally homochiral surfaces, represent essential challenges in surface studies. Here we report global homochirality two-dimensional enantiomorphous networks achiral molecules via co-assembly with chiral co-absorbers. The scanning tunnelling microscopy investigations molecular mechanics simulations demonstrate that point co-absorbers transfers to organizational assembly units enantioselective supramolecular...
Lithium-sulfur (Li-S) batteries are highly appealing for large-scale energy storage. However, performance deterioration issues remain, which related to interfacial properties. Herein, we present a direct visualization of the structure and dynamics Li-S discharge/charge processes at nanoscale. In situ atomic force microscopy ex spectroscopic methods directly distinguish morphology growth insoluble products Li2 S2 S. The monitored show that nanoparticle nuclei begin grow 2 V followed by fast...
Halogen bonding has attracted much attention recently as an important driving force for supramolecular assembly and crystal engineering. Herein, we demonstrate the first time formation of a halogen bond-based open porous network on graphite surface using ethynylpyridine aryl-halide based building blocks. We found that electrical stimuli scanning tunneling microscopy (STM) tip can induce binary structure basis bond between terminal pyridyl groups perfluoro-iodobenzene. This manipulation...
The precise and highly efficient drug delivery of nanomedicines into lesions remains a critical challenge in clinical translational research. Here, an autocatalytic morphology transformation platform is presented for improving the tumor-specific accumulation drugs by kinetic control. situ reorganization prodrug from nanoparticle to β-sheet fibrous structures targeted based on nucleation-based growth kinetics. During multiple administrations, can be realized skipping slow nucleating process...
Silicon nanowires (SiNWs) have attracted great attention as promising anode materials for lithium ion batteries (LIBs) on account of their high capacity and improved cyclability compared with bulk silicon. The interface behavior, especially the solid electrolyte interphase (SEI), plays a significant role in performance stability electrodes. We report herein an situ single nanowire atomic force microscopy (AFM) method to investigate electrochemistry silicon (SiNW) electrode. morphology...
ABSTRACT Catalyst‐free recyclable polybutadiene (PB) elastomer cross‐linked by dynamic imine bonds is prepared the reaction between amine functionalized PB and aldehyde cross‐linkers. The nature of bond investigated rheometry creep‐recovery experiments. cross‐linking degrees are regulated incorporating different amount aldehyde, their influence on elastomers in detail. temperature‐induced exchange reactions enable recycling mechanical properties almost unchanged after several cycles. It...