A5100358448- Dielectric materials and actuators
- Advanced Sensor and Energy Harvesting Materials
- Carbon Nanotubes in Composites
- Synthesis and Catalytic Reactions
- Catalytic C–H Functionalization Methods
- Diamond and Carbon-based Materials Research
- Ferroelectric and Piezoelectric Materials
- Conducting polymers and applications
- Ion-surface interactions and analysis
- ZnO doping and properties
- Graphene research and applications
- Magnetic Bearings and Levitation Dynamics
- Electric Motor Design and Analysis
- Gas Sensing Nanomaterials and Sensors
- Thin-Film Transistor Technologies
- Advanced biosensing and bioanalysis techniques
- Cyclone Separators and Fluid Dynamics
- Nanowire Synthesis and Applications
- Solar Thermal and Photovoltaic Systems
- Electrocatalysts for Energy Conversion
- Aerosol Filtration and Electrostatic Precipitation
- Electrochemical Analysis and Applications
- Nanoplatforms for cancer theranostics
- Nanotechnology research and applications
- Solar-Powered Water Purification Methods
Wuhan Textile University
2012-2025
Shanghai University
2004-2025
Lanzhou University
2009-2025
Case Western Reserve University
2019-2024
East China University of Science and Technology
2023-2024
Xinxiang Medical University
2021-2024
Qinghai University
2021-2024
Changchun University of Science and Technology
2022-2024
Ningbo University
2023-2024
University of Hong Kong
2001-2024
We report an efficient method for the alkylation of γ-C(sp(3))-H bonds picolinamide-protected aliphatic amine substrates with primary alkyl iodides via palladium catalysis. Ag(2)CO(3) and dibenzyl phosphate, (BnO)(2)PO(2)H, are critical promoters this reaction. These reactions provide a convenient straightforward preparation high-value N-containing products from readily available iodide precursors.
We report a new set of reactions based on the Pd-catalyzed alkylation methylene C(sp3)–H bonds aliphatic quinolyl carboxamides with α-haloacetate and methyl iodide applications in stereoselective synthesis various β-alkylated α-amino acids. These represent first generally applicable method for catalytic unconstrained unactivated C–H high synthetic relevance. When applied simple isotope-enriched reagents, they also provide convenient powerful means to site-selectively incorporate isotopes...
Easy on, easy off: Directing groups found to promote the palladium-catalyzed amination of γ C(sp3)H and C(sp2)H bonds secondary amides included 5-methoxy-8-aminoquinoline, which can be removed under mild conditions (see scheme; CAN=ceric ammonium nitrate). In conjunction with a β-CH methylation or γ-CH arylation step, γ-C(sp3)H provided access complex pyrrolidones from readily available precursors.
In this report, a highly efficient method for the room temperature installation of alkyl amino motifs onto ortho position anilines via Cu-catalyzed carboxamide-directed amination with alkylamines is described. This offers practical solution rapid synthesis complex arylamines from simple starting materials and enables new planning strategies construction arylamine-containing pharmacophores. A single electron transfer (SET)-mediated mechanism proposed.
With the modern development of power electrification, polymer nanocomposite dielectrics (or nanodielectrics) have attracted significant research attention. The idea is to combine high dielectric constant inorganic nanofillers and breakdown strength/low loss a matrix for higher energy density film capacitors. Although impressively has been achieved at laboratory scale, there still large gap from eventual goal nanodielectric In this review, we focus on essential material issues two types...
Abstract Piezoelectric polymers hold great potential for various electromechanical applications, but only show low performance, with | d 33 < 30 pC/N. We prepare a highly piezoelectric polymer ( = −62 pC/N) based on biaxially oriented poly(vinylidene fluoride) (BOPVDF, crystallinity 0.52). After unidirectional poling, macroscopically aligned samples pure β crystals are achieved, which high spontaneous polarization P s ) of 140 mC/m 2 . Given the theoretical limit s,β 188 neat crystal,...
We report a method for the monoselective alkylation of ortho-C–H bonds N-quinolyl benzamides with both primary and secondary alkyl halides under palladium catalysis. With promotion by NaHCO3 (BnO)2PO2H or (PhO)2PO2H, symmetric benzamide substrates can be selectively ortho-alkylated to give either mono- dialkylated products simply adjusting amount applied. The use phosphate notably improves yield, although it may not directly involved in C–H palladation subsequent functionalization step....
Small molecules participate extensively in various life processes. However, specific and sensitive detection of small a living system is highly challenging. Here, we describe vivo real-time dynamic monitoring by luminescent polymer-dot oxygen transducer. The optical transducer combined with an oxygen-consuming enzyme can sensitively detect small-molecule substrates as the enzyme-catalyzed reaction depletes its internal reservoir presence molecules. We exemplify this strategy using...
Abstract Coconut palm (Cocos nucifera,2n = 32), a member of genus Cocos and family Arecaceae (Palmaceae), is an important tropical fruit oil crop. Currently, coconut cultivated in 93 countries, including Central South America, East West Africa, Southeast Asia the Pacific Islands, with total growth area more than 12 million hectares [1]. generally classified into 2 main categories: “Tall” (flowering 8–10 years after planting) “Dwarf” 4–6 planting), based on morphological characteristics...
For the first time, sulfonylated polymers of intrinsic microporosity (PIMs) are exploited for high-<italic>κ</italic>, high-temperature, and low-loss gate dielectric applications.
Covalent adaptable networks (CANs) represent a transition material combining favorable features of thermosets and thermoplastics. However, it is still huge challenge to simultaneously achieve fast reprocessability high performance for CANs. Here, we designed catechol-based acetal CANs continuous reprocessing without sacrificing thermal mechanical properties. A small-molecule model study demonstrated the significantly accelerated exchange by neighboring group participation (NGP) phenolic...
This work highlights the exploitation of dihydrazone motif to build antibacterial covalent adaptable networks with no creep at ∼105 °C.
High cogging torque is a common drawback of the interior permanent magnet machine. In this paper, novel technique adopted to reduce and ripple by using an asymmetrical V-type rotor configuration. First, analysis modes are presented, proposed optimized hybrid design experiment. A satisfactory set parameters determined. Next, model compared with those basic model. The results demonstrate that reduced significantly adoption rotor. Then, performance rotating clockwise counterclockwise evaluate...
Heute hier, morgen dort: Die Palladium-katalysierte Aminierung von γ-ständigen C(sp3)-H- und C(sp2)-H-Bindungen sekundärer Amine gelingt mithilfe dirigierender Gruppen, einschließlich 5-Methoxy-8-aminochinolin, das unter milden Bedingungen entfernt werden kann (siehe Schema; CAN=Cerammoniumnitrat). In Verbindung mit einer β-C-H-Methylierung oder γ-C-H-Arylierung bietet die γ-C(sp3)-H-Aminierung Zugang zu komplexen Pyrrolidonen ausgehend leicht zugänglichen Vorstufen. As a service to our...
Abstract We report a new protocol for palladium‐catalyzed acetoxylation of the γ‐C( sp 3 )H bonds N ‐alkylpicolinamide substrates using PhI(OAc) 2 oxidant. These reactions involve use substoichiometric amounts Li CO additive, which effectively suppresses competing intramolecular CH amination process. Under these conditions, ‐propylpicolinamides bearing α substituents can be cleanly converted to γ‐acetoxylated amine products in excellent yield. This also used concert with other Pd‐catalyzed...
Valorization of lignin with renewable levulinic acid incorporated active ketone groups and could be utilized to produce high-performance polymers.
We present a simple route to creating anBTO200@MOF-Fe/Co heterostructures for efficient OER, but also provide unique platform designing superior, noble metal-free OER electrocatalysts via incorporating ferroelectric, high- κ nanomaterials.
Abstract Dynamic covalent polymers (DCPs) that strike a balance between high performance and rapid reconfiguration have been challenging task. For this purpose, solution is proposed in the form of new dynamic supramolecular motif—guanidine urea structure (GUAs). GUAs contain complex diverse chemical structures as well unique bonding characteristics, allowing guanidine to demonstrate advanced physical properties. Noncovalent interaction aggregates (NIAs) confirmed GUA‐DCPs through multistage...