A5020683589- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Vehicle emissions and performance
- Catalytic C–H Functionalization Methods
- Atmospheric Ozone and Climate
- Asymmetric Synthesis and Catalysis
- Asymmetric Hydrogenation and Catalysis
- Luminescence and Fluorescent Materials
- Gas Sensing Nanomaterials and Sensors
- Cyclopropane Reaction Mechanisms
- Axial and Atropisomeric Chirality Synthesis
- Environmental Policies and Emissions
- Maritime Transport Emissions and Efficiency
- Health, Environment, Cognitive Aging
- Carbon and Quantum Dots Applications
- Sulfur-Based Synthesis Techniques
- Catalytic Alkyne Reactions
- Antioxidant Activity and Oxidative Stress
- Fluorine in Organic Chemistry
- Porphyrin and Phthalocyanine Chemistry
- Inorganic Fluorides and Related Compounds
- Spectroscopy and Laser Applications
Southern University of Science and Technology
2019-2024
Abstract A Cu/CPA co‐catalytic system has been developed for achieving the direct hydrophosphinylation of alkynes with phosphine oxides in delivering novel axially chiral phosphorus‐containing alkenes high yields and excellent enantioselectivities (up to 99 % yield ee). DFT calculations were performed elucidate reaction pathway origin enantiocontrol. This streamlined modular methodology establishes a new platform design application styrene‐phosphine ligands.
Transition metal-catalyzed hydrofunctionalization of methylenecyclopropanes (MCPs) has presented a considerable challenge due to the difficult manipulation regioselectivity and complicated reaction patterns. Herein, we report straightforward Pd-catalyzed ring-opening hydrophosphinylation MCPs via highly selective C-C bond cleavage. This method allows for rapid efficient access wide range chiral allylic phosphine oxides in good yields high enantioselectivities. Additionally, density...
As the main anthropogenic source in open seas and coastal areas, ship emissions impact climate, air quality, human health. The latest marine fuel regulation with a sulfur content limit of 0.5% went into effect globally on January 1, 2020. Investigations after switching are necessary. In this study, online field measurements at an urban site modeling simulations were conducted to detect quality Greater Bay Area (GBA) China under new regulation. By utilizing high mass-resolution single...
Water-soluble organic molecules (WSOMs) in inhaled PM2.5 can readily translocate from the lungs into blood circulation, facilitating their distribution to and health effects on distant organs tissues human body. Human serum albumin (HSA), most abundant protein carrier blood, binds exogenous substances form non-covalent adducts subsequently transports them throughout circulatory system, thereby indicating internal exposure. The direct exposure of WSOMs needs be understood. In this study,...
Abstract. Atmospheric brown carbon (BrC) can significantly affect Earth’s radiation budget by its wavelength-dependent absorption in the ultraviolet (UV)-visible range. BrC consists of a wide variety organics with different optical properties, making accurate climate modeling essential for understanding radiative impact. Here, we conducted field campaign during summer Shenzhen, China, to investigate properties and molecular characteristics from diverse particle sources using both online...
Secondary organic aerosol (SOA) plays a significant role in air quality, climate, and human health. SOA produced from the oxidation of biogenic volatile compounds (VOCs) presence reactive nitrogen species constitutes major fraction ambient aerosol. This study investigates nonlinear effects mixed VOC systems, including monoterpenes sesquiterpenes, on yield, chemical composition, volatility SOA. Smog chamber experiments show that yields for mixtures are reduced compared to single-component...
Abstract Brown carbon (BrC) absorption impacts radiative forcing and climate change. Quantifying of BrC requires understanding its molecular composition characteristics. While organic molecules surrounding may impact absorption, their effects have not yet been investigated. This research determined matrix effect on by comparing individual within an matrix. Over 20,000 water‐soluble constituted the associated The enhanced aliphatic but suppressed aromatic BrC, especially with higher O/C...
Main observation and conclusion A highly efficient kinetic resolution of racemic 2‐substituted 1,2‐dihydroquinolines via Rh‐catalyzed asymmetric hydroarylation has been described for the first time. variety arylboronic acids coupled with under mild reaction condition. The transformations into enantio‐enriched 2,3‐diaryl‐tetrahydroquinolines as well recovered chiral 2‐aryl‐dihydroquinolines were obtained high yields excellent enantioselectivities (86%—99% ee , s factor up to 1057).
Abstract A catalytic method for the incorporation of an SCF 3 group to tryptamine derivatives was developed via a sulfide‐catalyzed cascade trifluoromethylthiolation‐cyclization. series C(3)‐CF S pyrrolidinoindolines were obtained in moderate good yields under mild conditions. Furthermore, some enantioselectivity observed when using chiral sulfide thiocineole as catalyst.
Dark aqueous-phase reactions involving the nitrosation and nitration of aromatic organic compounds play a significant role in production light-absorbing carbon atmosphere. This process constitutes crucial aspect tropospheric chemistry has attracted growing research interest, particularly understanding mechanisms governing nighttime between phenols nitrogen oxides. In this study, we present new findings concerning rapid dark containing electron-donating groups inorganic nitrite acidic aqueous...
Abstract Transition metal‐catalyzed hydrofunctionalization of methylenecyclopropanes (MCPs) has presented a considerable challenge due to the difficult manipulation regioselectivity and complicated reaction patterns. Herein, we report straightforward Pd‐catalyzed ring‐opening hydrophosphinylation MCPs via highly selective C−C bond cleavage. This method allows for rapid efficient access wide range chiral allylic phosphine oxides in good yields high enantioselectivities. Additionally, density...
Abstract A Cu/CPA co‐catalytic system has been developed for achieving the direct hydrophosphinylation of alkynes with phosphine oxides in delivering novel axially chiral phosphorus‐containing alkenes high yields and excellent enantioselectivities (up to 99 % yield ee). DFT calculations were performed elucidate reaction pathway origin enantiocontrol. This streamlined modular methodology establishes a new platform design application styrene‐phosphine ligands.
Reactive oxygen species (ROS) play a central role in health effects of ambient fine particulate matter (PM2.5). In this work,we screened for efficient and complementary oxidative potential (OP) measurements by comparing the response values multiple chemical probes( [[EQUATION]] , ) to PM2.5 Shenzhen, China. Combined with meteorological condition composition analysis, we explored different components emission sources on OP analyzed their seasonal variations. The results show that...