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Chinese Journal of Chemistry 2007年第3期25卷 268-271页

作者：张爱健张贵荣杨广达敖凤国陆嘉星 Shanghai Key laboratory of Green Chemistry and Chemical processes Chemistry Deparement East China Normal University Shanghai 200062 China

Electrochemical polymerization of aniline and 3-methylthiophene has been accomplished in 1-methylimidazium tetrafluoroborate （HMIMBF4） ionic liquid. Homopolymer and copolymers of aniline and 3-methylthiophene were obtained successfully. The copolymer was studied by cyclic voltammetry and electrochemical impedance spectroscopy. The formation of copolymer has been confirmed by FT-IR and UV spectra. The atomic force microscope （AFM） was used for microstructural analysis. Both the homopolymer and the copolymer had the catalytic activity for the hydroquinone.

关键词： copolymerization aniline 3-methylthiophene ionic liquid hydroquinone

Influence of Debye Plasma on the KLL Dielectronic Recombination of H-Like Helium Ions

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Chinese Physics Letters 2019年第8期36卷 39-42页

作者： Deng-Hong Zhang Lu-You Xie Jun Jiang Chen-Zhong Dong Key laboratory of atomic and Molecular Physics and Functional Materials of Gansu Province College of Physics and Electronic Engineering Northwest Normal University

Using the Debye shielding model, the effects of plasma shielding on the dielectronic recombination processes of the H-like helium ions are *** is found that plasma shielding causes a remarkable change in the Auger decay rate of the doubly excited 2p2 3P2 *** a result,the dielectronic recombination cross sections from the doubly excited 2p2 3p2 state increases with the decreasing Debye shielding length.

关键词： Dirac Influence Recombination

Grain refinement of Mg-Ca alloys by native MgO particles

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Journal of Magnesium and Alloys 2024年第3期12卷 980-996页

作者： Shihao Wang Yun Wang Quentin M.Ramasse Zhongyun Fan Super STEM laboratory SciTech Daresbury CampusDaresbury WA44ADUK School of Chemical and Process Engineering University of LeedsLeeds LS29JTUK BCAST Brunel University LondonUxbridgeMiddlesex UB83PHUK

In Mg-Ca alloys the grain refining mechanism,in particular regarding the role of nucleant substrates,remains the object of *** native MgO is being recognised as a nucleating substrate accounting for grain refinement of Mg alloys,the possible interactions of MgO with alloying elements that may alter the nucleation potency have not been elucidated ***,we design casting experiments of Mg-xCa alloys varied qualitatively in number density of native MgO,which are then comprehensively studied by advanced electron *** results show that grain refinement is enhanced as the particle number density of MgO *** native MgO particles are modified by interfacial layers due to the co-segregation of Ca and N solute atoms at the MgO/Mg *** aberration-corrected scanning transmission electron microscopy and electron energy loss spectroscopy,we reveal the nature of these Ca/N interfacial layers at the atomic *** of the crystallographic termination of MgO,Ca and N co-segregate at the MgO/Mg interface and occupy Mg and O sites,respectively,forming an interfacial structure of a few atomic *** interfacial structure is slightly expanded,less ordered and defective compared to the MgO matrix due to compositional deviations,whereby the MgO substrate is altered as a poorer template to nucleate Mg *** solidification in a TP-1 mould,the impotent MgO particles account for the grain refining mechanism,where they are suggested to participate into nucleation and grain initiation processes in an explosive *** work not only reveals the atomic engineering of a substrate through interfacial segregation but also demonstrates the effectiveness of a strategy whereby native MgO particles can be harnessed for grain refinement in Mg-Ca alloys.

关键词： Mg-Ca alloy Grain refinement MgO Interfacial segregation STEM/EELS Solidification.

RESEARCH ACTIVITY OF atomic PHYSICS IN RIKEN

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原子与分子物理学报 1985年第4期 32-38页

作者： Tsutomu Watanabe atomic processes laboratory Saitama-ken 351-01 Japan The Institute of physical and Chemical Research RIKEN Wako-shi

RIKEN has a long trasition of atomic physics research in the field ofatomic and molecular *** recent years,the research activityhas also be maintained but be a little shifted to the field of spectroscopyof highly ioni... 详细信息

关键词： In RESEARCH ACTIVITY OF atomic PHYSICS IN RIKEN

Polystyrene microsphere-immobilized palladium(Ⅱ)porphyrin as mild,reusable,and highly efficient catalyst for Heck reaction

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Particuology 2015年第5期13卷 128-133页

作者： Yinbin Huang Liangrong Yang Minghui Huang Jian Wang Lin Xu Wensong Li Huacong Zhou Xitong Sun Huifang Xing Huizhou Liu Key laboratory of Green processes and Engineering Institute of Process EngineeringChinese Academy of Sciences Agricultural & Biosystems Engineering South Dakota State University Art College Hubei University of Economics

A novel Heck reaction catalyst consisting of a palladium（ll） complex of meso-tetra（p- hydroxyphenyl）porphyrin （MTP） and cross-linked chloromethylated polystyrene microspheres （PMs） was successfully prepared via covalent ether bonds between the chloride groups in the PMs and the hydroxyl groups in MTP. The catalyst was characterized using scanning electron microscopy, Fourier-transform infrared spectroscopy, and inductively coupled plasma atomic emission spectroscopy （ICP-AES）. This polystyrene-supported palladium-complex was an efficient heterogeneous catalyst for cross-coupling of aryl iodides with ethyl acrylate. The reaction of iodobenzene and ethyl acrylate under N2 at 100 °C and a catalyst concentration of 0.1% gave a gas chromatography product yield of 99.8%, which is much higher than that achieved using a free palladium（II） complex of MTP as the catalyst （41.3%）. The catalyst was recycled up to six times without significant loss of catalytic activity. These results suggest that the immobilized palladium（II） MTP catalyst has potential applications in synthetic and industrial chemistry.

关键词： Heterogeneous catalyst Palladium-porphyrin Polystyrene microspheres Heck reaction

Photoelectron imaging of resonance-enhanced multiphoton ionization and above-threshold ionization of ammonia molecules in a strong 800-nm laser pulse

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Chinese Physics B 2019年第6期28卷 140-145页

作者： Le-Le Song Ya-Nan Sun Yan-Hui Wang Xiao-Chun Wang Lan-Hai He Si-Zuo Luo Wen-Hui Hu Qiu-Nan Tong Da-Jun Ding Fu-Chun Liu Institute of atomic and Molecular Physics Jilin UniversityChangchun 130012China Jilin Institute of Chemical Technology Changchun 132022China Jilin Provincial Key laboratory of Applied atomic and Molecular Spectroscopy Jilin UniversityChangchun 130012China College of Electronic Science and Engineering State Key Laboratory on Integrated OptoelectronicsJilin UniversityChangchun 130012China

In this work, we mainly investigate the NH3 molecular multiphoton ionization process by using the photoelectron velocity map imaging technique. Under the condition of femtosecond laser(wavelength at 800 nm), the photoelectron images are detected. The channel switching and above-threshold ionization(ATI) effect are also confirmed. The kinetic energy spectrum(KES) and the photoelectron angular distributions(PADs) are obtained through the anti-Abel transformation from the original images, and then three ionization channels are confirmed successfully according to the Freeman resonance effect in a relatively low laser intensity region. In the excitation process, the intermediate resonance Rydberg states are C^1 A 1(6 + 2 photons process), B^1 E(6 + 2 photons process) and C^1 A 1(7 + 2 photons process), respectively. At the same time, we also find that the photoelectron angular distributions are independent of laser intensity. In addition, the electrons produced by different processes interfere with each other and they can produce a spider-like structure. We also find ac-Stark movement according to the Stark-shift-induced resonance effect when the laser intensity is relatively high.

关键词： photoelectron imaging Rydberg state resonance-enhanced multiphoton ionization photoelectron angular distribution

Breakup Effect of Weakly Bound Projectile on the Barrier Distribution Around Coulomb Barrier

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Plasma Science and Technology 2012年第5期14卷 390-392页

作者：贾会明林承键张焕乔刘祖华喻宁杨峰徐新星贾飞吴振东张世涛 China Institute of atomic Energy

The excitation function of quasi-elastic （QEL） scattering at a backward angle has been measured for 9^Be＋208^Pb. The barrier distribution was extracted by means of the first derivative of the measured excitation function and calculated with the coupled-channel model. The present work shows that the experimental barrier distribution extracted from QEL scattering is shifted to the low energy side by 1.5 MeV as compared with the theoretical one. This energy discrepancy indicates that breakup is important in the colliding processes of the weakly bound nucleus system.

关键词： quasi-elastic scattering barrier distribution coupled-channel model

A comparative QSAR study on the estrogenic activities of persistent organic pollutants by PLS and SVM

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Emerging Contaminants 2015年第1期1卷 8-13页

作者： Fei Li Jialin Liu Lulu Cao Key laboratory of Coastal Environmental processes and Ecological Remediation Yantai Institute of Coastal Zone Research(YIC)Chinese Academy of Sciences(CAS)Shandong Provincial Key Laboratory of Coastal Environmental ProcessesYICCASYantaiShandong264003PR China

Quantitative structure-activity relationships(QSARs)were determined using partial least square(PLS)and support vector machine(SVM).The predicted values by the final QSAR models were in good agreement with the corresponding experimental *** estrogenic activities are related to atomic properties(atomic Sanderson electronegativities,van der Waals volumes and polarizabilities).Comparison of the results obtained from two models,the SVM method exhibited better overall ***,three PLS models were constructed for some specific families based on their chemical *** predictive models should be useful to rapidly identify potential estrogenic endocrine disrupting chemicals.

关键词： Persistent organic pollutants(POPs) Estrogen receptor(ER) Quantitative structure activity relationship(QSAR) Partial least square(PLS) Support vector machine(SVM)

Neutron Generation and Kinetic Energy of Expanding Laser Plasmas

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Chinese Physics Letters 2007年第10期24卷 2792-2795页

作者：黄永盛王乃彦段晓礁兰小飞谭志新汤秀章何也熙 High Power Excimer Laser laboratory China Institute of Atomic Energy Beijing 102413 Department of Engineering Physics Tsinghua University Beijing 100084

We investigate the kinetic energy of expanding plasma of a solid target heated by a ultra-short and ultra-intense laser pulse and the efllciency of energy coupling between the ultra-intense laser pulse and the solid target, in order to increase the utilization ratio of laser energy and to raise the neutron generation farther. Some new ideas about improving the energy utilization by head-on collision~, between the expanding plasmas are proposed. The significance is the raise of generation of shorter duration neutron, of the order of picoseconds, which allows for an increase of energy resolution in time-of-flight experiments and also for the investigation of the dynamics of nuclear processes with high temporal resolution.

关键词： coated conductor buffer layer self-epitaxy CeO2

CHARGE CHANGING processes IN ION—ATOM COLLISIONS

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原子与分子物理学报 1985年第4期 39-42页

作者： Tsutomu Watanabe 351-01 Japan atomic processes laboratory Saitama-ken The Institute of Physical and Chemical Research (RIKEN Wako-shi

When an ion Aq+traverses in a gaseous target B,the charge of theion q is changed by collisions with the atom B as Aq++ B→A~((q-p)+)+Bp+(1)

关键词： CHARGE CHANGING processes IN ION ATOM COLLISIONS