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Synthesis, Crystal Structure and Reactivity of (2,4-C_7H_(11) )_2Yb·DME

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Chemical Research in Chinese Universities 2001年第1期17卷 14-19页

作者： ZHANG Suo-bo liu ju-zheng ZHUANG Xiu-li HUANG Jing-qin HU Ning-hai CHEN Wen-qi Department of Chemistry Jilin UniversityChangchun 130023P.R.China Changchun Institute of Applied Chemistry Chinese Academy of SciencesChangchun 130022P.R.China

(2,4 C 7H 11 ) 2Yb·DME was synthesized by the reaction of YbCl 3 with K(2,4 C 7H 11 )(2,4 dimethylpentadienyl potassium), and the single crystal X ray diffraction showed that the complex exists in a cis staggered conformation. The crystal of the compound belongs to the monoclinic space group P2 1/n with a =0.875 2 (1) nm, b =1.490 6(1) nm, c =1.529 3(2) nm, β =97 55(2)° , V =1.977 79(4) nm 3, Z =4, F (000)=735.8 e, μ =49.49 cm -1 , R =0.033 and R w=0.032 . The title complex can be used as a catalyst for the polymerization of methyl methacrylate(MMA).

关键词： Dimethylpentadienyl Synthesis Crystal structure Catalyst Polymerization

Sythesis, Characterization and Catalysis of [ η~5,η~1-C_5H_4-CHPh-PhO]TiCl_2

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Chemical Research in Chinese Universities 2001年第1期17卷 115-116页

作者： WANG Jian hui MU Ying PU Wei ming ZHANG Yue tao YANG Guang di liu ju zheng Department of Chemistry Jilin UniversityChangchun 130023P.R.China

The synthesis and structure of phenol groups containing ligand 2-[(cyclopentadienyl-phenyl)-methyl]phenol(CpH-PhCH-PhOH) were described. H Nuclear magnetic resonance (NMR) was used to show existence of ligand precursor in isomers of the group. Me3SiCp-PhCH-PhOSiMe3 was formed via treatment of 2 mol Me3SiCl with the dilithium salt of the ligand. New Ti compound [η+5, η1-C5H4-PhCH-PhO]TiCl2 was formed by reacting with titanium chloride.

关键词： Metallocene Catalyst Cyclopentadienyl group

Isolation and Characterization of a Bioactive Polysaccharide from Panax Quinquefolium L.

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Chemical Research in Chinese Universities 1998年第2期14卷 35-38页

作者： MA Xiu-li HAO Chun-yan LU Shi-xiang SUN Yun-xiu liu ju-zheng liu Shu-ying Department of Chemistry Jilin UniversityChangchun130023 Changchun Institute of Applied Chemistry Changchun130022

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关键词： Panax quinquefolium L. Polysaccharide Matrixassisted laser desorption/ionization mass spectrometry(MALDIMS)

Compound Derived from Anthracene and Pyrazol for a Light-Emitting Diode

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Chinese Physics Letters 2001年第6期18卷 831-833页

作者： WANG Ming-Liang ZHANG jun-Xiang liu ju-zheng XU Chun-Xiang Department of Chemistry and Chemical Engineering Southeast UniversityNanjing 210096 Department of Electronic Engineering Southeast UniversityNanjing 210096

A new compound,5-(9-anthryl)-1,3-diphenyl-1H-pyrazol(ADPP),with an anthryl moiety as an emissive group and a diphenylpyrazoline moiety as a charge transporting group is designed and *** absorption,photoluminescence,electroluminescence,and electrochemistry are *** of ADPP is similar to that of anthracene in the vibonic structure but shows slight red shifts because anthryl moiety twists strongly with respect to pyrazol moiety although delocalization still exists between the two *** emitting devices fabricated with ADPP show a bright blue emission at 470 *** turn-on voltage is 12 V and the light emission follows the current closely,indicating an efficient charge injection and transport for both electrons and holes.

关键词： moiety charge electrochemistry

Synthesis and Crystal Structure of[(2 , 4-Me_2C_5H_5)_2NdC =CC_6H_5]_2

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Chemical Research in Chinese Universities 1994年第4期10卷 308-312页

作者： Zhang, Suo-bo liu, ju-zheng Wei, Ge-cheng Jia, Heng-qing Chen, Wen-qi

he reaction of (2, 4-C_7H_11)_3Nd with HC=CC_6H_5 in toluene leads to [(2, 4-C_7H_11)_2NdC = CC_6H_5]_2 , which crystallizes in the space group P_cab with unit cell pa-rameters a=1 . 0489 (11), b=1.8033 (12), c=2. 1064 (15)nm and Z=4 , least-squares refinement based on 2323 observed reflections converged to a final R valueof 0. 08. The molecular structure shows that the complex is a dimer, in which two(2,4-C_7H_11)_2Nd units are connected by asymmetrical alkynide bridges with indepen-dent Nd-C(alkynide) bond lengths of 0. 2552(25)and 0. 2560(24)nm, Nd-C=C angles of 124. 1(17)° and 134. 2(17)°.

关键词： Synthesis Structure Tris (2 4-dimethylpentadienyl ) neodymium.Phenylacetylene

Mn(OAc)_2/Schiff base as a new efficient catalyst system for the Henry reaction of nitroalkanes with aldehydes

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Chinese Chemical Letters 2012年第6期23卷 690-694页

作者： Guang Peng Zhou Yong Hai Hui Ning Ning Wan Qiu ju liu zheng Feng Xie Ji De Wang Key Laboratory of Oil and Gas Fine Chemicals Ministry of Education and Xinjiang Uyghur Autonomous RegionCollege of Chemistry and Chemical Engineering Xinfiang University Urumqi 830046 China

A series of novel Schiff bases bearing triazole structure were synthesized and characterized by LR and NMR. Mn（OAc）2/Schiff base efficiently catalyzed Henry reaction of nitroalkanes with aldehydes to produce the corresponding products of ^-nitroalcohols, under mild conditions with high yields （up to 99%）. A reaction mechanism is proposed based on the experimental results.

关键词： Schiff base Henry reaction Aldehydes Nitroalkanes

Synthesis of Enantiom eric Planar Square Ni^(2+) -and Cu^(2+) -Schiff Base Com plexes

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Chemical Research in Chinese Universities 1999年第3期15卷 248-252页

作者： ZHAO Jian-zhang WANG Shu-gang WANG Xu liu ju-zheng QIAO Xiao-guang LI Yao-xian WANG Hua Department of Chemistry Jilin UniversityChangchun 130023P.R.China Third Clinical College&China Japan Union Hospital of Norman Bethune Unviersity of Me dical Sciences Changchun 130023P.R.China

Enantiomeric four chelated planar square schiff base Cu 2+ and Ni 2+ complexes were synthesized using ( 1R,trans ) and ( 1S,trans) N,N  bis(2 hydroxyphenyl methylene) 1,2 diaminocyclohexane. The chirality could not be shown by usual UV Vis spectra. The intrinsic chiral difference of the enantiomeric complexes can be displayed by circular dichroism(CD) spectra. The Cotton effect of every polarlight sensitive absorption of one enantiomer will be the opposite of that of the other enantiomer. It was found that no tetrahedron form exists for Ni 2+ complexes, which was determined with UV Vis spectra and Electron Paramagnetic Resonance(EPR) measures.

关键词： Chiral transition metal schiff base complex Circular dichroism(CD) Enantiomeric

Synthesis and Crystal Structure of (E)-[1-Ferrocenyl-2-(4-Chlorophenyl) ethylene]

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Chinese Journal of Structural Chemistry 1997年第4期16卷 315-319页

作者： QIAN Ying SUN Yue-Ming liu ju-zheng(Department of Chemistry, Southeast University, Nanjing, 210018)CHEN Jian HU Chun-Hua zheng Pei-ju(Research Center of Analysis and Measurement, Fudan University, Shanghai, 2OO433) 东南大学化学系江苏南京复旦大学分析测试中心上海

The single crystal structure of the donor-acceptor ferrocenyl derivativeC18H15ClFe (Mr = 322. 62 ) has been determined, belonging to orthorhombic crystalsystem, space group P212121 with lattice parameters a= 11. 307 (2), b= 8. 471 (2 ), c=15. 427(3) A, V= 1477. 7(9) A3, Z=4, D.= 1. 45 g. cm-3, λ(MoKα) =0. 71073A,μ= 11. 9 cm-1, F(000) = 664. The final R value for 1534 observed [I>3σ(I)] reflec-tions is 0. 060. The configuration of the C =C double bond is trans. The C5H4CH =CHC6H4Cl fragrnent is almost planar. The rings of ferrocene are almost in the eclipsedpositions with each other.

关键词： ferrocenyl derivative crystal structure donor-acceptor compound transconfiguration

Partition-based Network Equivalent Method for Power System Subsynchronous Oscillation Analysis

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 313-320页

作者： Chenxuan Wang Weimin zheng Zhen Wang Yangqing Dan Ping ju the Department of Electrical Engineering Zhejiang UniversityHangzhou 310027China the Economic Research Institute of State Grid Zhejiang Electric Power Co. Ltd.Hangzhou 310016China the College of Energy and Electrical Engineering Hohai UniverstiyNanjing 211100China

Given large-scale modern power systems with pow er electronic converters,the numerical simulation with subsyn chronous oscillation(SSO)faces great challenges in engineering practice due to sharply enlarged modeling scale and high com putational *** reduce the modeling scale,network parti tion and equivalent becomes a vital technique in numerical sim *** several methods have been developed for net work equivalent,a generally accepted rule for network parti tion is still *** paper proposes that the system can be partitioned into three parts,i.e.,the internal,the middle,and the external subsystems,in which the internal subsystem consists of all power electronic components,the middle subsys tem includes those selected AC dynamic components with de tailed models,and the remaining components and buses consti tute the external *** external subsystem is further represented by an equivalent RLC network determined by the frequency dependent network equivalent(FDNE)*** the proposed method,the observability index and the electrical distance index are used to identify the interface between the middle and the external *** studies based on a modified Hydro-Quebec system are used to verify the effective ness of the proposed method.

关键词： Electrical distance network equivalent subsyn chronous oscillation observability index