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Palladium-catalyzed Suzuki couplings using a novel diaminophosphine oxide as ligand

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Chinese Chemical Letters 2012年第5期23卷 521-524页

作者： wen peng mai Hui Hui Wang Jin Wei Yuan Liang Ru Yang Zhi Cheng Li Chemistry and Chemical Engineering School Henan University of TechnologyZhengzhou 450001China

A novel diaminophosphine oxide was synthesized and applied as ligand in palladium-catalyzed Suzuki couplings reaction of aryl bromides and *** coupling reaction proceeded smoothly at mild conditions using 2 mol%Pd_2（... 详细信息

关键词： Palladium Suzuki reaction Coupling Diaminophosphine oxide

A novel and facile synthesis of 4-arylquinolin-2(1H)-ones under metal-free conditions

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Chinese Chemical Letters 2015年第8期26卷 977-979页

作者： Bin Sun wen-peng mai Liang-Ru Yang Pu Mao Jin-Wei Yuan Yong-Mei Xiao School of Chemistry and Chemical Engineering Henan University of Technology

A novel and facile synthesis of 4-arylquinolin-2（1H）-ones without metal catalysis has been *** reaction involved cyclization/elimination steps and was performed under metal-free conditions using inexpensive reagents... 详细信息

关键词： facile inexpensive steps catalysis cyclization elimination spectrometer silver catalyzed silica

Copper-Catalyzed Radical Cyclization for Synthesis of 3,3-Difluoro-4-methyl-1-arylpyrrolidin-2-ones

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Copper-Catalyzed Radical Cyclization for Synthesis of 3,3-Di...

Identification of a dual functional betulinic acid analog for the treatment of osteoarthritis by phenotypic screening

河南省化学会2018年学术年会

作者： wen-peng mai Ming-Xiu Lv Kui Lu School of Materials and Chemical Engineering Henan University of Engineering School of Chemical Engineering and Food Science Zhengzhou Institute of Technology

In the past five years,the fluoroalkyl radical addition over aπacceptor has become one of the most straightforward methods to construct C–CF *** advances have been achieved in this ***,compared to the prevailing C(sp)–CF formation,the incorporation of a difluoromethyl group into diverse skeletons to construct a new C(sp)–CF bond is *** the best of our knowledge,there are only very few examples on this *** instance,photoredox catalysts(Ir and Ru)were reported to promote fluoroalkylation of alkenes to render C(sp)–CF bond ***,we report Cu-catalyzed difluoroalkylation of alkenes for the construction of C(sp)–CF bond combining a cyclization for preparation of3,3-Difluoro-4-methyl-1-arylpyrrolidin-2-ones(Scheme 1).

关键词： Copper Radical cyclization Difluoromethyl group

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Science China Life Sciences 2025年第1期68卷 300-302页

作者： Ze-Min Lin mai Xiang wen-Hui Wei Shu-Hui Fan Li Chen Jie Wang Xiao-Qian Yang Chun-Hao Yang Shi-Jun He Jian-Ping Zuo Laboratory of Immunopharmacology State Key Laboratory of Drug ResearchShanghai Institute of Materia MedicaChinese Academy of Sciences School of Pharmacy University of Chinese Academy of Sciences School of Pharmacy Nanjing University of Chinese Medicine State Key Laboratory of Drug Research Department of Medicinal ChemistryShanghai Institute of Materia MedicaChinese Academy of Sciences Innovation Research Institute of Traditional Chinese Medicine Shanghai University of Traditional Chinese Medicine Experiment Center for Science and Technology Shanghai University of Traditional Chinese Medicine

Dear Editor, Phenotypic drug discovery, which observes compound effects on physiology,has given way to targeting specific molecules, but has revived by using modern methods to find drugs based on therapeutic outcomes in disease models(Vincent et al., 2022). Osteoarthritis(OA) is a prevalent chronic joint disorder, primarily affecting knee joints, with osteoclast activation due to low-grade inflammation resulting in increased bone resorption and structural changes in the joint(Katz et al.,2021).

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Efficient and Stable Perovskite Solar Cells and Modules Enabled by Tailoring Additive Distribution According to the Film Growth Dynamics

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Nano-Micro Letters 2025年第2期17卷 387-400页

作者： Mengen Ma Cuiling Zhang Yujiao Ma Weile Li Yao Wang Shaohang Wu Chong Liu Yaohua mai Institute of New Energy Technology College of Physics&Optoelectronic EngineeringJinan UniversityGuangzhou 510632People’s Republic of China Key Laboratory of New Semiconductors and Devices of Guangdong Higher Education Institutes Jinan UniversityGuangzhou 510632People’s Republic of China Guangdong Mellow Energy Co. LimitedYuanming RoadZhuhai 519075GuangdongPeople’s Republic of China

Gas quenching and vacuum quenching process are widely applied to accelerate solvent volatilization to induce nucleation of perovskites in blade-coating *** this work,we found these two pre-crystallization processes lead to different order of crystallization dynamics within the perovskite thin film,resulting in the differences of additive *** then tailor-designed an additive molecule named 1,3-bis(4-methoxyphenyl)thiourea to obtain films with fewer defects and holes at the buried interface,and prepared perovskite solar cells with a certified efficiency of 23.75%.Furthermore,this work also demonstrates an efficiency of 20.18%for the large-area perovskite solar module(PSM)with an aperture area of 60.84 cm^(2).The PSM possesses remarkable continuous operation stability for maximum power point tracking of T_(90)>1000 h in ambient air.

关键词： Gas quenching Additive distribution Buried passivation Blade coating Crystallization dynamics

Characterization of structural and electrical properties of ZnO tetrapods

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International Journal of Minerals,Metallurgy and Materials 2011年第6期18卷 686-690页

作者： Yu-dong Gu wen-jie mai peng Jiang Department of Advanced Materials and Nanotechnology College of Engineering Peking University Beijing 100084 China School of Materials Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332-0245 USA Department of Physics Jinan University Guangzhou 510632 China National Center for Nanoscience and Technology Beijing 100190 China

ZnO tetrapods were synthesized by a typical thermal vapor-solid deposition method in a horizontal tube *** characterization was carried out by transmission electron microscopy （TEM） and select-area electron diffraction （SAED）,which shows the presence of zinc blende nucleus in the center of tetrapods while the four branches taking hexagonal wurtzite *** electrical transport property of ZnO tetrapods was investigated through an in-situ nanoprobe *** three branches of a tetrapod serve as source,drain,and ＂gate＂,respectively;while the fourth branch pointing upward works as the force trigger by vertically applying external force *** conductivity of each branch of ZnO-tetrapods increases 3-4 times under *** such situation,the electrical current through the branches of ZnO tetrapods can be tuned by external force,and therefore a simple force sensor based on ZnO tetrapods has been demonstrated for the first time.

关键词： zine oxide tetrapods electrical property piezoelectric materials semiconductors nanostructures

Effects of precipitates and inclusions on the fracture toughness of hot rolling X70 pipeline steel plates

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International Journal of Minerals,Metallurgy and Materials 2012年第9期19卷 805-811页

作者： mai-wen Zhou Hao Yu School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China

In order to investigate the fracture toughness, crack tip opening displacement （CTOD） experiments were conducted on two X70 pipeline steel plates with different rolling processes. Atter the experiments, optical microscopy （OM）, scanning electron microscopy （SEM） and transmission electron microscopy （TEM） were employed to observe the microstructure and fracture morphology. The effects of precipi- tates on the fracture toughness and the crack initiation mechanism induced by inclusions were analyzed. The CTOD result shows that the steel with a lower finishing cooling temperature has a higher fracture toughness. Inchisiom with different shapes and two kinds of precipi- tates with different sizes were observed. It can be concluded that precipitates with different sizes have different effects and mechanisms on the fracture toughness. Distinguished fi＇om the earlier researches, inclusions enriched in silicon can be also served as the crack initiation.

关键词： pipeline steel crack propagation precipitates inclusions fracture toughness

（2＋1）-Dimensional Electron Acoustic Solitary Waves in an Unmagnetized Collisionless Plasma with Vortex-Like Hot Electrons

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Communications in Theoretical Physics 2007年第2期47卷 339-342页

作者： LIN mai-mai DUAN wen-Shan Department of Physics Northwest Normal University Lanzhou 730070 China

In this paper, （2＋1）-dimensional electron acoustic waves （EAW） in an unmagnetized collisionless plasma have been studied by the linearized method and the reductive perturbation technique, respectively. The dispersion relation and a modified Kadomtsev-Petviashvili （KP） equation have been obtained for the EAW in the plasma considering a cold electron fluid and a vortex-like hot electrons. It is found from some numerical results that the parameter β（the ratio of the free hot electron temperature to the hot trapped electron temperature） effects on the amplitude and the Width of the electron acoustic solitary waves （EASW）. It can be indicated that the free hot electron temperature and the hot trapped electron temperature have very important effect on the characters of the propagation for the EASW.

关键词： electron acoustic solitary wave vortex-like hot electrons reductive perturbation method

Three-Dimensional Dust-Acoustic Waves in a Collisional Dusty Plasma with Opposite Polarity Particles

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Communications in Theoretical Physics 2005年第4X期44卷 719-723页

作者： LIN mai-mai DUAN wen-Shah Department of Physics Northwest Normal University Lanzhou 730070 China

The dispersion relation is derived for three-dimensional dust-acoustic waves in a current-driven dusty plasmas with both positively and negatively charged dust particles. The dependencies of the frequency and the growth rate on the wave number K, the intensity of magnetic field B, and the inclination angle θ have been numerically shown in this paper. The growth rate is negative for the laboratory dusty plasma, but it is positive for the cosmic dusty plasma. It is found that when the inclination angle θ = π/2, there is no instability. The effect of the electrostatic field Eo has also been studied in this paper.

关键词： dust plasma opposite polarity particles