A5016496342- Metal-Organic Frameworks: Synthesis and Applications
- X-ray Diffraction in Crystallography
- X-ray Spectroscopy and Fluorescence Analysis
- Machine Learning in Materials Science
- Electron and X-Ray Spectroscopy Techniques
- Electrocatalysts for Energy Conversion
- Spectroscopy and Quantum Chemical Studies
- Iron oxide chemistry and applications
- Nanoparticle-Based Drug Delivery
- Catalytic Processes in Materials Science
- ZnO doping and properties
- Photochemistry and Electron Transfer Studies
- Nanoplatforms for cancer theranostics
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Catalysis and Oxidation Reactions
- Advanced Chemical Physics Studies
- Advanced battery technologies research
- Advanced Photocatalysis Techniques
- Gas Sensing Nanomaterials and Sensors
- Nanoparticles: synthesis and applications
- Crystallography and molecular interactions
- Metal complexes synthesis and properties
- Fuel Cells and Related Materials
- Innovative Microfluidic and Catalytic Techniques Innovation
Southern Federal University
2015-2024
Southern Scientific Center
2020
Russian Academy of Sciences
2020
Institute of Management Business and Law
2016
Helmholtz-Zentrum Berlin für Materialien und Energie
2010-2012
Freie Universität Berlin
2012
Lomonosov Moscow State University
2012
Accurate modeling of the X-ray absorption near-edge spectra (XANES) is required to unravel local structure metal sites in complex systems and their structural changes upon chemical or light stimuli. Two relevant examples are reported here concerning following: (i) effect molecular adsorption on 3d metals hosted inside metal-organic frameworks (ii) induced dynamics spin crossover complexes. In both cases, amount models for simulation can reach a hundred, depending number parameters. Thus,...
The design of active acidic oxygen evolution reaction (OER) catalysts is paramount importance to achieve efficient large-current-density industrial hydrogen fuel production via water electrolysis. Herein, we develop a Pt-based catalyst with high electrochemical activity for the OER in conditions under large current. We this by modulating electronic structure Pt into high-valence, electron-accessible Pt1(2.4+δ)+ (δ = 0–0.7) state during reaction. This single-site can effectively maintain...
The aim of the present work was to investigate toxic effects zinc oxide nanoparticles (ZnO NPs, particle size < 50 nm) on physiological and anatomical indices spring barley (Hordeum sativum L.). results show that ZnO NPs inhibited H. growth by affecting chlorophyll fluorescence emissions causing deformations stomatal trichome morphology, alterations cellular organizations, including irregularities chloroplasts, disruptions grana thylakoid organizations. There a lower number chloroplasts...
Beneficial features of biocompatible high-capacity UiO-66 nanoparticles, mesoporous SiO2, and folate-conjugated pluronic F127 were combined to prepare the core-shell UiO-66@SiO2/F127-FA drug delivery carrier for targeted cellular uptake in cancer treatment. UiO-66-NH2 nanoparticles with a narrow size shape distribution used form series MOF@SiO2 structures. The duration silanization was varied change thickness SiO2 shell, revealing nonlinear dependence that attributed silicon penetration into...
The oxygen reduction reaction (ORR) catalyzed by efficient and economical catalysts is critical for sustainable energy devices. Although the newly-emerging atomically dispersed platinum are highly attractive maximizing atomic utilization, their catalytic selectivity durability severely limited inflexible valence transformation between Pt supports. Here, we present a structure anchoring atoms onto valence-adjustable CuOx/Cu hybrid nanoparticle supports (Pt1-CuOx/Cu), in which high-valence Cu...
Abstract The electrochemical reduction of CO 2 (eCO RR) that exclusively produces one product at industrial current density is crucial for the substantial storage renewable energy. Modulating electronic structure atomically dispersed catalysts can effectively regulate adsorption rate‐determining‐step intermediates to achieve desired products. Here, study constructs a hybrid catalyst consisting single Ag atoms and atomic clusters supported on nitrogen‐doped multi‐walled carbon nanotubes...
Formation of Pd nanoparticles inside UiO-67 MOF was monitored by <italic>in situ</italic> X-ray absorption and diffraction.
Accurately manipulating the electronic structure of metal active sites under working conditions is central to developing efficient and stable electrocatalysts in industrial water-alkali electrolyzers. However, lack an intuitive means capture evolution during reaction state inhibits manipulation its structure. Here, atomically dispersed Ru single-sites on cobalt nanoparticles confined onto macro-microporous frameworks (M-Co NPs@Ru SAs/NC) with tunable electron coupling effect for catalysis...
Abstract The oxygen reduction reaction (ORR) catalyzed by transition‐metal single‐atom catalysts (SACs) is promising for practical applications in energy‐conversion devices, but great challenges still remain due to the sluggish kinetics of O═O cleavage. Herein, a kind high‐density iron network‐like sites are constructed with optimized intermetallic distances on an amino‐functionalized carbon matrix (Fe‐HDNSs). Quasi‐in situ soft X‐ray absorption spectroscopy and synchrotron infrared...
A liquid microjet was used to obtain oxygen K-edge X-ray absorption and emission spectra of water–acetonitrile mixtures various compositions. The observed spectral changes are unambiguously related the increasing number broken hydrogen bonds with decreasing water concentration, hydrogen-bond network can thus be addressed on purely experimental grounds without need for theoretical modeling. Detailed facts importance specialist readers published as "Supporting Information". Such documents...
Knowledge about the hydrogen bond network of water is essential for understanding its anomalies as well special role biochemical systems. Different types x-ray spectroscopy allow probing molecular orbitals water, revealing electronic structure which reflects conformations. In this work a recently developed high-resolution emission spectrometer was used in combination with microjet technique recording spectra liquid H${}_{2}$O and D${}_{2}$O their mixtures acetonitrile. Variation nuclear...
Herein, we report a novel one-step solvothermal synthesis of magnetite nanoclusters (MNCs). In this report, discuss the synthesis, structure, and properties MNCs contrast enhancement in T2-weighted MR images using nanoclusters. The effect different organic acids, used as surfactants, on size shape was investigated. structure samples were determined by magnetic measurements, TGA, TEM, HRTEM, XRD, FTIR, MRI. Magnetic measurements show that obtained have relatively high saturation magnetization...
The structure of Ce3+, which is responsible for the low-temperature oxygen storage capacity ceria, was determined by high-energy-resolution fluorescence detected X-ray absorption spectroscopy at Ce L3 and L1 edges. Well-defined ceria nanoparticles (rods, truncated octahedra, cubes) were synthesized hydrothermally promoted platinum nanoparticles. electronic Ce3+ does not depend significantly on nature exposed crystallographic planes CeO2 particles; it does, however, differ from known stable...
A series of 73 ligands and their Cu+2 Cu+1 copper complexes with different geometries, oxidation states the metal, redox activities were synthesized characterized. The aim study was to establish structure–activity relationship within a analogues substituents at N(3) position, which govern potentials Cu+2/Cu+1 couples, ROS generation ability, intracellular accumulation. Possible cytotoxicity mechanisms, such as DNA damage, intercalation, telomerase inhibition, apoptosis induction, have been...
Two metal–organic frameworks (MOFs), UiO-66 and UiO-66-NH2, were considered as containers for bioactive chemicals. We provide a synthesis technique, which allowed the production of these materials suitable biomedical applications. Both MOFs characterized single-phase porous composed nanoparticles (30–65 nm) with ζ-potential more than 40 mV in water suspension. D,L-Leucine was applied model molecule, us to trace mechanism loading process. showed that after synthesis, amino groups UiO-66-NH2...