A5042171882- Photochemistry and Electron Transfer Studies
- Free Radicals and Antioxidants
- Spectroscopy and Quantum Chemical Studies
- Laser-induced spectroscopy and plasma
- Porphyrin and Phthalocyanine Chemistry
- Analytical chemistry methods development
- Space Satellite Systems and Control
- Combustion and Detonation Processes
- Photochromic and Fluorescence Chemistry
- Luminescence and Fluorescent Materials
- Rocket and propulsion systems research
- Energetic Materials and Combustion
- Perovskite Materials and Applications
- Mercury impact and mitigation studies
- Quantum Dots Synthesis And Properties
- Plasma Diagnostics and Applications
- Gas Sensing Nanomaterials and Sensors
- Advanced Photocatalysis Techniques
- Astro and Planetary Science
- Cultural Heritage Materials Analysis
- Mechanics and Biomechanics Studies
- Electron Spin Resonance Studies
- Laser-Ablation Synthesis of Nanoparticles
- Thermodynamic properties of mixtures
- Experimental and Theoretical Physics Studies
Space Engineering University
2021-2025
Jilin University
2018-2021
Qufu Normal University
2020
Jilin Medical University
2018
The twisted intramolecular charge transfer (TICT) state plays an important role in determining the performance of optoelectronic devices. However, for some nonfluorescent TICT molecules, "invisible" could only be visualized by modifying molecular structure. Here, we introduce a new facile pressure-induced approach to light up through use pressure-related liquid-solid phase transition surrounding solvent. Combining ultrafast spectroscopy and quantum chemical calculations, it reveals that can...
The excited-state double proton transfer (ESDPT) process of dipyrido[2,3-a:3',2'-i]carbazole (DPC) in ethanol (EtOH) solvent is investigated using density functional theory (DFT) and time-dependent (TDDFT). computational results provide convincing evidence that did not occur spontaneously for the DPC monomer due to lack hydrogen bonds. Interestingly, after adding EtOH DPC, two intermolecular bonds were formed ground-state, strengthened excited-state, as confirmed by comparing changes primary...
Harnessing ingenious modification of molecular structure to regulate excited-state intramolecular proton transfer (ESIPT) and charge (ICT) characteristics holds great promise in fluorescence sensing imaging. Based on the 3-hydroxyflavone (3HF) molecule, 2-(2-benzo[b]furanyl)-3-hydroxychromone (3HB) 2-(6-diethylamino-benzo[b]furan-2-yl)-3-hydroxychromone (3HBN) were designed by extension furan heterocycle introduction a diethylamino group. The analysis important hydrogen bond length, frontier...
This investigation employs femtosecond laser-induced breakdown spectroscopy (fs-LIBS) to measure the concentrations of chromium (Cr), lead (Pb), and copper (Cu) in flowing aqueous solutions. The fs pulsed laser excites water, generating plasma a dynamic setting that prevents liquid splashing-a notable advantage over static methods. water column maintains stable level, circumventing focus irregularities due liquid-level fluctuations. Calibration curves, based on linear function, reveal limits...
The excited-state carrier dynamics of lead halide perovskites play a critical role in their photoelectric properties, and are greatly affected by lattice structural changes. In this work, the all-inorganic CsPbBr3 peroveskite, as function pressure, investigated using situ high-pressure femtosecond transient absorption spectroscopic experiments. Compression is found to drive crystal evolution, thereby markedly changing behavior charge carriers CsPbBr3. Before phase transition, simultaneous...
The interfacial charge transfer still limits the photoactivity of artificial Z-scheme photocatalysts although they showed complementary light absorption and a strong photoredox ability. In this study, layered metallene is designed as an efficient electron mediator for constructing C3N4/bismuthene/BiOCl 2D/2D/2D system. This bismuthene serves bridge processing superior conductibility, abundant metal–semiconductor contact sites, shortened diffusion distance, enhancing photocatalytic CO2...
The paper presents a simulation physical model of laser thruster under vacuum back pressure environment. Through the finite difference method and Direct Simulation Monte Carlo (DSMC) calculation method, based on actual structure working mode, changes flow field distribution in plume different conditions are obtained. influence density velocity was verified through experiments, evolution process during ablation polyamide glycidyl ether (GAP) solid target material analyzed detail. results good...
The vigorous development of micro–nano satellites urgently requires satellite-borne propulsion systems as support. Pulsed laser ablation micro-propulsion can meet these high demands. Ammonium dinitramide (ADN), a green monopropellant, serve the working substance for ablation. This work investigated performance liquid propellants composed ADN and water with different mass fractions, aiming to clarify enhancement effect chemical energy. Through single-pulse impulse measurement, results show...
Propellants play a crucial role in the propulsion systems of aerospace vehicles, and their combustion characteristics are susceptible to external environmental conditions. This study systematically investigated impact various initial conditions on process ADN-based propellant, including products, equilibrium pressure, adiabatic temperature, ignition delay time. The results indicate that primary products propellant include N2O, N2, CO2, OH, others. exhibits distinct two-stage under low...
This study proposes a novel calibration method for polyvinylidene fluoride (PVDF) piezoelectric sensors based on electromagnetic force. The standard force source is obtained by calibrating the original of inductor coil through an electronic balance. Transient loading waveforms and peak values PVDF were to analyze mechanical effects laser ablation Al/Ti alloys. sensing using exhibits wide linear detection range (0.01–5.8 V) high response in changes electrical signals. When irradiating alloy...
This study systematically investigates the dynamic evolution of chemical regimes in pulsed coaxial dielectric barrier discharge (DBD) plasma under atmospheric pressure using mass spectrometry. An innovative real-time spectrometric monitoring methodology was established, enabling tracking formation and consumption processes key reactive species such as ozone (O3) nitrogen oxides (NOx). Energy density critical parameter governing gaseous components, with a quantitative elucidation regulatory...
The study of thruster plume flow fields can yield a series performance parameters such as thrust effect, spacecraft contamination, etc., which is great significance for development. paper presents physical simulation model laser under vacuum back-pressure environment. Through the finite difference method and Direct Simulation Monte Carlo (DSMC) calculation method, based on actual ablation structure working mode, changes in flow-field distribution different conditions are obtained. influence...
By combining surface-enhanced and discharge-assisted laser-induced breakdown spectroscopy, the study successfully realized high-sensitivity quantitative analysis of trace heavy metals Cr, Cu, Pb in aqueous solutions.