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Syntheses and Crystal Structures of Two 3D Zinc(II) Compounds Involving Coordination and Hydrogen Bonds

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Chinese Journal of Structural Chemistry 2006年第5期25卷 527-532页

作者： chen bai-Quan HAN Lei WU Ben-Lai WU Ming-Yan HUANG You-Gui HONG Mao-Chun State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

Two zinc（Ⅱ） compounds, [Zn（L）（H2O）2]n 1 and [Zn（4,4＇-bpy）（H2O）4]（L） 2 （H2L = trans,trans-1,3 butadiene 1,4-dicarboxylic acid）, were synthesized by hydrothermal methods and characterized by single-crystal X-ray diffraction analyses. Compound 1 crystallizes in monoclinic, space group C2/c with a=15.4970（16）, b = 5.4976（6）, c = 10.7113（12） A, β=96.298（6）°, C6H8O6Zn, Mr = 241.50, V = 907.06（17） A^3, Z = 4, D, = 1.768 g/cm^3, F（000） = 488,μ = 2.703 mm^-1, S = 1.060, the final R = 0.0256 and wR = 0.0660 for 968 observed reflections with Ⅰ 〉 2σ（Ⅰ）. Compound 2 crystallizes in triclinic, space group P1^- with a = 6.915（2）, b = 7.166（2）, c = 10.363（3） A, α = 73.250（4）, β = 84.429（4）, γ = 61.605（3）°, C16H2ON2O8Zn, Mr = 433.70, V = 432.1 （2） A^3, Z = 1, D, = 1.667 g/cm^3, F（000） = 224 and μ= 1.471 mm^-1, S = 1.118, the final R = 0.0486 and wR = 0.1077 for 1352 observed reflections with Ⅰ〉 2σ（Ⅰ）. Upon using the assembly strategy of combination of coordination polymer chains with intermolecular hydrogen bonds, three-dimensional frameworks of complexes 1 and 2 were formed.

关键词： Zn(Ⅱ) coordination polymer hydrogen bonds crystal structure

Co/Pt multilayer-based pseudo spin valves with perpendicular magnetic anisotropy

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Rare Metals 2014年第6期33卷 646-651页

作者： Shuai Liu Guang-Hua Yu Mei-Yin Yang Hai-Lang Ju Bao-He Li Xiao-bai chen School of Materials Science and Engineering University of Science and Technology Beijing State Key Laboratory of Superlattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences School of Science Beijing Technology and Business University

Pseudo spin valves（SVs） exhibiting perpendicular magnetic anisotropy were prepared by magnetron sputtering. Magnetization measurements of the Co/Pt multilayers were performed to select the reference and free layers. The selection criteria are square magnetic hysteresis loops, weaker current shunting effect, and proper coercivity. The optimal reference layer and free layer are Pt（5.0 nm）/[Co（0.4 nm）/Pt（0.6 nm）]3/Co（0.4 nm）/Cu（3.0 nm）and Cu（3.0 nm）/[Co（0.4 nm）/Pt（1.5 nm）]4, *** resulting pseudo SV exhibits two well-separated hysteresis loops when the field is applied perpendicular to the film plane. The minor hysteresis loop corresponding to the free layer shifts toward negative direction of the magnetic field axis, indicating ferromagnetic interlayer exchange coupling between the two magnetic layers. The coupling also enhances the coercivity（HC） of both layers. The perpendicular giant magnetoresistance（GMR） of 2.7 % is achieved with current in plane measurement. The GMR first increases when Pt seed layer is thickened, reaches a maximum of 3.0 % at 4 nm and then decreases with the further increase of thickness. But thicker Cu spacer layer always lowers the GMR of the SV.

关键词： Perpendicular magnetic anisotropy Spin valve Giant magnetoresistance Ferromagnetic coupling Co/Pt multilayers

Progress and perspectives of in situ polymerization method for lithium-based batteries

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Interdisciplinary Materials 2023年第4期2卷 609-634页

作者： Guanyou Xiao Hao Xu chen bai Ming Liu Yan-Bing He Institute of Materials Research(IMR) Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhenChina

The application of lithium-based batteries is challenged by the safety issues of leakage and flammability of liquid *** electrolytes(PEs)can address issues to promote the practical use of lithium metal ***,the traditional preparation of PEs such as the solution-casting method requires a complicated preparation process,especially resulting in side solvents evaporation *** large thickness of traditional PEs reduces the energy density of the battery and increases the transport bottlenecks of ***,it is difficult to fill the voids of electrodes to achieve good contact between electrolyte and *** situ polymerization appears as a facile method to prepare PEs possessing excellent interfacial compatibility with ***,thin and uniform electrolytes can be *** interfacial impedance can be reduced,and the lithium-ion transport throughput at the interface can be *** typical in situ polymerization process is to implant a precursor solution containing monomers into the cell and then in situ solidify the precursor under specific initiating conditions,and has been widely applied for the preparation of PEs and battery *** this review,we focus on the preparation and application of in situ polymerization method in gel polymer electrolytes,solid polymer electrolytes,and composite polymer electrolytes,in which different kinds of monomers and reactions for in situ polymerization are *** addition,the various compositions and structures of inorganic fillers,and their effects on the electrochemical properties are ***,challenges and perspectives for the practical application of in situ polymerization methods in solid-state lithium-based batteries are reviewed.

关键词： in situ polymerization interface compatibility lithium-based batteries polymer electrolytes

Multispectral imaging in detecting early retinal pigment epithelial atrophy

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International Journal of Ophthalmology(English edition) 2018年第6期11卷 1071-1074页

作者： Jie Zhang Ying-bai chen Zi-Kui Yu Lin Liu Department of Ophthalmology Renji Hospital School of Medicine Shanghai Jiao Tong University

Dear Editor,Idiopathic choroidal neovascularization （CNV） is described as a rare but potentially blinding fundus disease wherein a choroidal neovascular membrane develops in the apparent absence of any coexistent oc...

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Flexible Blue Light Emitting Diodes Made from Dye Doped Poly (N-Vinylcarbazole) with Multilayer Structure

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Chinese Physics Letters 1997年第1期14卷 74-76页

作者： chen bai-jun HOU Jing-ying HUANG Jing-song LIU Shi-yong State Key Laboratory on Integrated Optoelectronics Jilin UniversityChangchun 130023

Flexible blue light emitting diodes(LEDs)were fabricated by using poly(N-vinylcarbazole)(PVK)doped with high fluorescence dye,1,1,4,4-tetraphen1-1,3-butadiene(TPB),as a emitter layer,a layer of tris(8-quinolino1ato)aluminum(Ⅲ)(Alq3)as an electron-transporting layer,and a layer of 2-(4-biphenylyl)-5-(4-tertbutypheny)-1-3,4-oxadiazole(PBD)as hole-blocking layer;a cell structure of flexible substrate/indium-tin-oxide/PVK:TPB/PBD/Alq3/Al was *** this cell structure,carrier injection from the electrodes to the doped PVK layer and concomitant electroluminescence from doped PVK were observed at room temperature with dcbias voltage of *** emission peaks at about *** kind of LED is about 200μm thick and can be curled or bent repeatedly at sharp angles without failure.

关键词： emitter layer repeatedly

Physiological mechanisms of resistance to cold stress associated with 10 elite apple rootstocks

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Journal of Integrative Agriculture 2018年第4期17卷 857-866页

作者： WANG Yan-xiu HU Ya chen bai-hong ZHU Yan-fang Mohammed Mujitaba Dawuda Sofkova Svetla College of Horticulture Gansu Agricultural University Deparment of Horticulture Faculty of Agriculture University for Development Studies Institute of Agriculture and Environment Massey University

A study was conducted in attempting to identify the cold-resistant apple rootstocks and to establish a comprehensive evaluation system. In this study, 10 elite apple dwarfing rootstocks(GM256, JM7, M26, M7, SC1, SH1, SH38, SH6, M9, and T337) were employed for the experiment and the following parameters were investigated under different low temperature stress conditions(0, –15, –20, –25, –30, and –35°C): the changes of the relative electrical conductivity(REC), anthocyanin content, protein content, soluble sugar content, soluble starch content, proline content, malondialdehyde(MDA) content, superoxide dismutase(SOD) activity, and peroxidase(POD) activity of the dormant branches. The inflection temperature that could represent the plant tissue semi-lethal temperature(LT) was obtained by the measurements of REC. The LTwas used to evaluate eight other indices. The results showed that there was no significant correlation between LTand POD activity as well as between the soluble sugar, protein and proline contents at 0 and –15°C. Soluble starch content at 0 and –15°C and anthocyanin content at –15–(–30)°C were significantly but negatively correlated to the LT50 and the MDA content at 0–(–20)°C was significantly positively correlated to the LT. Statistical analysis based on principal component analysis and LT50 showed that cold resistant apple rootstocks in the decreasing order from high to low as GM256, SH6, SH38, SH1, SC1, M26, M7, JM7, T337, and M9.

关键词： cold resistance LT_(50) principal component analysis apple dwarfing rootstock

Gas-Particle Flow and Combustion Characteristics of Pulverized Coal Injection in Blast Furnace Raceway

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Journal of Iron and Steel Research International 2010年第10期17卷 8-12页

作者： ZHANG Sheng-fu bai chen-guang WEN Liang-ying QIU Gui-bao LU Xue-wei College of Materials Science and Engineering Chongqing University Chongqing 400030 China

The two-dimensional steady-state discrete phase mathematical model is developed to analyze gas-particle flow and combustion characteristics of coal particles, as well as components concentration and temperature distribu- tion of coal gas in the process of pulverized coal injection of blast furnace raceway. The results show that a great deal of coal gas discharges on the top of raceway away from the tuyere, and the residence time of coal particles in the re- gion of blowpipe and tuyere is 20 ms or so and 50 ms when it reaches raceway boundary. The pressure is the highest at the bottom of raceway and the maximal temperature is about 2 423 K. The char combustion is mainly carried out in the raceway and the maximum of char burn-out rate attains 3× 10-4 kg/s.

关键词： blast furnaces raceway pulverized coal injection gas-particle flow combustion

INVOLVEMENT OF p38 MITOGEN-ACTIVATED PROTEIN KINASE IN ***-INDUCED U937 APOPTOSIS

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Chinese Medical Sciences Journal 2007年第1期22卷 49-53页

作者： Jia-he Wang Yi-jun Zhou Ping He bai-yi chen Department of Geriatrics the Second Affiliated Hospital China Medical University Shenyang 110004 Department of Endocrinology and Metabolism the Fourth Affiliated Hospital China Medical University Shenyang 110032 Department of Infectious Diseases the First Affiliated Hospital China Medical University Shenyang 110001

Objective To investigate whether the effect of E. coli on U937 cell fines apoptosis is mediated via p38 mitogen-activated protein kinase （MAPK） activation. Methods The U937 cell lines were treated with E. coli at different time or together with SB203580, an inhibitor for p38. Cell apoptosis was analyzed by flow cytometry, p38 activities were detected by Western blotting. Results E. coli induced apoptosis in cultured U937 cell lines in a time-dependent manner. The phosphorylation of p38 was induced after 10 minutes infection, reached the peak after 20 minutes, and started to decline after 30 minutes. In contrast, the level of total p38 protein was not changed in whole experimental period. Inhibition of p38 with SB203580 significantly inhibited E. coli induced apoptosis in U937 cells. Conclusion The activation of the p38 MAPK in U937 cell lines by E. coli is a major pathway to mediate the apoptosis.

关键词： E. coli apoptosis U937 p38 mitogen-activated protein kinase

Progress on Space Medicine in 2008-2010

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空间科学学报 2010年第5期30卷 499-503页

作者： Li Yinghui Liu Zhaoxia Zhang Xiaoyou bai Yanqiang chen Shanguang China Astronaut Research and Training Center Beijing 100094 China

Space Medicine is a special subject to be rising with the development of manned *** China,Space Medicine has achieved great development during the past two *** this paper,the basic research of Space Medicine and its a... 详细信息

关键词：航天医学载人航天飞行基础研究中国