A5065221963- Archaeology and ancient environmental studies
- Geology and Paleoclimatology Research
- Radical Photochemical Reactions
- Catalytic C–H Functionalization Methods
- Sulfur-Based Synthesis Techniques
- Radioactive element chemistry and processing
- Pacific and Southeast Asian Studies
- Pleistocene-Era Hominins and Archaeology
- Extraction and Separation Processes
- Ionic liquids properties and applications
- Analytical chemistry methods development
- Chinese history and philosophy
- Maritime and Coastal Archaeology
- Organoboron and organosilicon chemistry
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Chemical and Physical Properties in Aqueous Solutions
- Corrosion Behavior and Inhibition
- Archaeology and Natural History
- Building materials and conservation
- Lanthanide and Transition Metal Complexes
- Chemical Reactions and Isotopes
- Archaeology and Rock Art Studies
- Nuclear Materials and Properties
- Forensic and Genetic Research
Henan Provincial Institute of Cultural Heritage and Archaeology
2011-2025
Tsinghua University
2022-2024
Beijing General Research Institute of Mining and Metallurgy
2024
National University of Singapore
2017-2021
Republic Polytechnic
2017
Beijing National Laboratory for Molecular Sciences
2016
Peking University
2016
Tianjin Normal University
2010
Abstract Although there has been significant progress in the development of transition‐metal‐catalyzed hydrosilylations alkenes over past several decades, metal‐free hydrosilylation is still rare and highly desirable. Herein, we report a convenient visible‐light‐driven both electron‐deficient electron‐rich that proceeds through selective hydrogen atom transfer for Si−H activation. The synergistic combination organophotoredox catalyst 4CzIPN with quinuclidin‐3‐yl acetate enabled by activation...
An unprecendented direct alkylation of unfunctionalized allylic/benzylic sp<sup>3</sup>C–H bonds<italic>via</italic>photoredox induced radical cation deprotonation is disclosed.
Value-added chemicals, γ-aryl ketones and naphthalenes, were conveniently synthesized from readily available toluenes enones through the synergistic combination of photoredox Lewis acid catalysis. The direct synthesis represents a rare example Giese reactions between benzylic C(sp3)–H that avoids use prefunctionalized metallic nucleophiles. Naphthalene derivatives accessed one-pot reaction/Friedel–Crafts hydroxyalkylation/oxidative aromatization sequential transformation.
The peopling history of the Yellow River basin (YR) remains largely unexplored due to limited number ancient genomes. Our study sheds light on dynamic demographic YR by co-analyzing previously published genomes and 31 newly generated Late Neolithic Iron Age from Shandong in lower Central Plain middle YR. analysis reveals population structure Longshan cultural period. We provide a genetic parallel observation significant increase rice farming However, rice-farmer-related gene flow period did...
The Sanyangzhuang site, Henan Province, China, has a 12‐m‐deep stratigraphic sequence with remains from the Tang (A.D. 618–907), late Western Han (ca. 140 B.C.–A.D. 23), Warring States (475–221 B.C.), Late Neolithic or Early Bronze Age 5000–1500 Middle Holocene, and Holocene times. All of paleosols are deeply buried. We investigate four issues relevant to archaeology lower Yellow River Valley. First, we confirm that flowed north toward Bohai Bay throughout most Holocene. Second, expand...
Abstract Although there has been significant progress in the development of transition‐metal‐catalyzed hydrosilylations alkenes over past several decades, metal‐free hydrosilylation is still rare and highly desirable. Herein, we report a convenient visible‐light‐driven both electron‐deficient electron‐rich that proceeds through selective hydrogen atom transfer for Si−H activation. The synergistic combination organophotoredox catalyst 4CzIPN with quinuclidin‐3‐yl acetate enabled by activation...
From AD 1048 to 1128, Yellow River flooding killed over a million people, left many more homeless and destitute, turned parts of the once fertile North China Plain into silted-up agricultural wasteland. Brought on in part by climate change Northern Song dynasty’s (AD 960–1127) mismanagement environment, floods likely hastened collapse dynasty. Despite magnitude this flood event, no sedimentary deposits have yet been linked these historically recorded floods. In research paper, we provide...
The authors present the discovery of a Han period farming site sealed beneath 5m flood deposits, where courtyard houses have been excavated belonging to Western Dynasty and Wang Mang ( c . 140 BC–AD 23). Preservation is exceptional, both at village Sanyangzhuang itself and, by dint satellite reconnaissance, over vast landscape contemporarily covered flood. Deep profiles show that here land surfaces Neolithic Warring States periods also lie buried. potential for study early agricultural...
Polarity-reversal catalysts enable otherwise sluggish or completely ineffective reactions which are characterized by unfavorable polar effects between radicals and substrates. We herein disclose that when irradiated visible light, bromine can behave as a polarity-reversal catalyst. Hydroacylation of vinyl arenes, three-component cascade transformation deuteration aldehydes were each achieved in metal-free manner without initiators using inexpensive N-bromosuccinimide the precatalyst. Light...
Amberlyst-15/H2O has been used as an efficient and environmentally friendly catalytic system for the synthesis of quinoxalines. The present methodology offers several advantages, such excellent yields, short reaction time, simple workup.
Abstract Rising global temperatures will increase the number of extreme weather events, creating new challenges for cities around world. Archaeological research on destruction and subsequent reoccupation ancient has potential to reveal geological social dynamics that have historically contributed making urban settings resilient these events. Using a combination archaeological methods, we examine how flood events at Kaifeng, former capital dynastic China, shaped city’s resilience....
Abstract The potential scale of industrial outputs in the ancient world is often underestimated current archaeological studies due to lack surviving artifacts for validation production scale. However, traces left on extant can help us reconstruct methods, and thus reveal certain industries, even although there may not be a sufficient number existing demonstrate such volumes. bronze bell casting industry operating around 500 BCE Xinzheng Henan province, China, used as an example then use by...
ABSTRACT The development of irrigation is a politically important technology that enabled agricultural societies to intensify production. In the North China Plain, historical record suggests long tradition irrigation, but archaeologists have found scant evidence these technologies outside urban areas. 2012, 2015, and 2016, our excavations at Anshang site, Neihuang County, Henan Province, China, revealed several archaeological features we interpret as Late Shang dynasty ( ca . 1200–1046 B.C.)...
Abstract The heartlands of many the world's civilizations are situated within alluvial plains, where thick sediments obscure much archaeological record. However, use geoarchaeology remains patchy, particularly in largest basins. We present results from our geoarchaeological survey at Neihuang County, Henan Province, China, as an example for research North China Plain and to develop a generalized framework landscape evolution area during Holocene. reconstruct history around County by...
Investigation of the fundamental coordination chemistry between U(VI) and simple organic ligands is important to understand chemical behavior in natural environment separation processes. In this work, complexation with a common carboxylic acid, benzoic has been systematically investigated through potentiometry, spectrometry DFT calculations. Three successive complexes (UO2L+, UO2L2 UO2L3-, L = benzoate ion) acid are successfully identified aqueous solution their corresponding thermodynamic...
Abstract Styrene derivatives were hydroacylated with exclusive anti-Markovnikov selectivity by using neutral eosin Y as a direct hydrogen-atom-transfer (HAT) catalyst under visible-light irradiation. Aldehydes and styrenes various substituents tolerated (>20 examples), giving the corresponding products in moderate to high yields. The key acyl radical intermediate was generated from HAT process induced photoexcited Y. Subsequent addition reverse ketone products.
Abstract This article explores the criteria used to ascertain whether or not, and how, ancient Chinese bronze bells might form sets of musical instruments, thus clarifying their original intended use by musicians. The focus is on ten unearthed from Changsha city in Hunan province China, which date twelfth century BCE. A range diverse relationships between these provide valuable insights that can be explored. Debate ongoing among music historians regarding nature bells. Some argue do not...