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Synthesis and Crystal Structure of a Heteronuclear Erbium and Yttrium Complex with Proline: [ErY(pro)_6(H_2O)_6] (ClO_4)_6

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Chinese Journal of structural chemistry 1998年第4期17卷 239-244页

作者： ZHANG Hua-Jie WANG Rui-Yao WANG Zhe-Ming JIN Tian-Zhu YAN Chun-Hua(state key laboratory of Rare Earth Materials chemistry and Applications, Research Centerof Rare Earth chemistry, peking university, beijing 100871)YANG Qing-Chuan(Institute of Physical state key Lab. Rare Earth Mat. C./A. Res. Center of Rare Earth Chemistry Peking University Beijing 100871 China Institute of Physical chemistry Peking University Beijing 100871 China

The title complex was synthesized in an aqueous solution at pH=3. 5,and its crystal structure was determined by X-ray diffraction methods. The com-plex is triclinic with space group P1, formula C30H66O42N6Cl6ErY, Mr,= 1651. 76, a=9. 860(2), b=13. 020(5), c= 13. 632(5) A ; a= 109. 32(3), β=110. 19(2), γ=100. 96(2)°, V= 1456(1 ) A3, Dc= 1. 884 g/cm3, Z= 1, F(000) =833, P= 2. 812mm-1 ;R=0. 046, wR(F2) =0. 123 for 4897 reflections with I>2(I). The complexis of an infinite chain structure with the neibouring metal ions connected by two bridging carboxyl groups from two different proline molecules. The erbium ion and the yttrium ion statistically lies at the position of the metal ion with M=1/2(Er+Y).

关键词： crystal structure heteronuclear complex of erbium and yttrium proine

The quality control mechanism for the transloction of the outer membrane proteins in the periplasm of Gram-negative bacteria

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The quality control mechanism for the transloction of the ou...

第一届全国生物物理化学会议暨生物物理化学发展战略研讨会

作者： Si Wu~1,Xi Ge~2,Zeyong Zhi~1,and Zengyi Chang~2,Xin Sheng Zhao~(1,*) 1 beijing National laboratory for molecular Sciences,state key laboratory for structural chemistry of unstable and stable species,and Department of Chemical Biology,college of chemistry and molecular engineering,peking university,beijing,100871,china 2 The Center for Protein Science,The National laboratory of Protein engineering and Plant Genetic engineering,and college of Life Science,peking university,beijing,100871,china

＜正＞The outer membrane proteins（OMPs） of the Gram negative bacteria have to be translocated through the cytoplasm,the inner membrane,and the periplasmic space before reaching their final *** highly fluctuating nature of the periplasmic space,due to the high permeability of the outer membrane,engenders such translocation process inevitably challenging and would have to rely on an efficient quality control

关键词： outer membrane protein DegP single molecule fluorescence protein quality control

C-H Functionalization via Transition Metal Catalyzation

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C-H Functionalization via Transition Metal Catalyzation

中国化学会第二十五届学术年会

作者： Xiaobing Wan, Zhongxun Ma, Zhangjie Shi* beijing National laboratory for molecular Sciences (bnlms) and The key laboratory of Bioorganic chemistry and molecular engineering of Ministry of Education, college of chemistry and Green chemistry Center, peking university, beijing 100871, china and state key laboratory of Organometallic chemistry, Chinese Academy of Sciences, Shanghai 200032, china

A Convenient Synthesis of Octahydro-pyrazino[ 1,2-a]pyrazine

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A Convenient Synthesis of Octahydro-pyrazino[ 1,2-a]pyrazine

第三届全国有机化学学术会议

作者： LIANG, Feng WU, Xiao-Jun ZHANG, Shi-Wei WU, Cheng-Tai (Department of chemistry, Wuhan university, Wuhan 430072) ( state key laboratory for structural chemistry of stable and unstable species , peking university, beijing 100871)

＜正＞ The recent research results suggest that a series of octahydro-pyrazino[1,2-a]pyrazines are useful as antiallergic agents. Gubert et al. developed a route from 1,4-dibenzyl-2-ethoxycarbonylpiperazine for the synthesis of this ring system. Under their conditions, this ring system was obtained with a low overall yield in six steps. Optimization of synthetic route to this ring system is still desirable. In this paper, we presented an efficient synthesis of octahydro-

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Catalytic Sommelet-Hauser Rearrangement of Sulfonium Ylides derived from Rh（Ⅱ） Carbenes and Benzenesulphenanilides

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Catalytic Sommelet-Hauser Rearrangement of Sulfonium Ylides ...

第十六届全国金属有机化学学术讨论会

作者： Yuye Li,Yi Shi,Yan Zhang,Jianbo Wang~* beijing National laboratory for molecular Sciences(bnlms),key laboratory of Bioorganic chemistry and molecular engineering of Ministry of Education,college of chemistry,peking university,beijing 100871,china

＜正＞Indoles and their derivatives are found abundantly in nature and are known to exhibit potent physiological *** methods for the preparation of indoles have been *** some cases,specific substitution patterns have ...

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Heterogeneous reaction of NO_2 with sea salt particles

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Science china chemistry 2010年第12期53卷 2652-2656页

作者： YE ChunXiang 1,LI HongJun 1,ZHU Tong 1,SHANG Jing 1,ZHANG ZeFeng 1,2 & ZHAO DeFeng 1 1 state key Joint laboratory of Environmental Simulation and Pollution Control college of Environmental Sciences and engineering,peking university,beijing 100871,china 2 college of Atmospheric Physics,Nanjing university of Information Science and Technology,Nanjing 210044,china 1. state key Joint laboratory of Environmental Simulation and Pollution Control college of Environmental Sciences and engineering Peking University Beijing 100871 China2. College of Atmospheric Physics Nanjing University of Information Science and Technology Nanjing 210044 China

To understand how NO2 reacts with sea salt particles in the atmosphere of Mega-cities in coastal zones,the heterogeneous reaction of NO2 on the surface of wet sea salt was investigated with diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and ion chromatography (IC).Kinetic measurements indicated that nitrate formation on sea salt was second order in NO 2 concentration and reactive uptake coefficients were (5.51 ± 0.19) × 10-7 and 1.26 × 10-6 respectively under 0% and 20% relative humidity (RH) at NO 2 molecular concentration of 1.96 × 1015 mol/*** results showed that liquid water was formed at the site of MgCl2·6H2O,CaCl2·2H2O on the surface of sea salt and made the reaction more sustainable by releasing hydrated water and absorbing water from air even under a low RH (30%).Therefore,pure NaCl particles should not be used to represent sea salt in studies of the heterogeneous reaction with NO2.

关键词： sea salt particles diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) hydrated water absorbed water reactive uptake coefficient

Pd-Catalyzed Three-Component Coupling of N-Tosylhydrazone,Terminal Alkyne and Aryl Halide

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Pd-Catalyzed Three-Component Coupling of N-Tosylhydrazone,Te...

第十六届全国金属有机化学学术讨论会

作者： Lei Zhou,Fei Ye,Yan Zhang and Jianbo Wang~* beijing National laboratory for molecular Sciences(bnlms),key laboratory of Bioorganic chemistry and molecular engineering of Ministry of Education,college of chemistry,peking university,beijing 100871,china

＜正＞The transition metal catalyzed reactions of diazo compounds have been well-established as powerful approaches to generate metal carbene species,which may subsequently undergo a wide range of highly valuable and ...

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Implementation of a multiple round quantum dense coding using nuclear magnetic resonance

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Science china(Physics,Mechanics & Astronomy) 2005年第6期48卷 706-715页

作者： ZHANG Jingfu1, XIE Jingyi2, WANG Chuan1, DENG Zhiwei3, LU Zhiheng4, & LONG Guilu1,5 1. key laboratory For Quantum Information and Measurements of MOE, Department of Physics, Tsinghua university, beijing 100084,china 2. Department of Materials Science and engineering, beijing Normal university, beijing 100875, china 3. Testing and Analytical Center, beijing Normal university, beijing 100875,china 4. Department of Physics, beijing Normal university, beijing 100875, china 5. key laboratory For atomic and molecular Nanosciences, Tsinghua university, beijing 100084,china 1. key laboratory For Quantum Information and Measurements of MOE Department of Physics Tsinghua University 100084 Beijing China 2. Department of Materials science and engineering Beijing Normal University 100875 Beijing China 3. Testing and Analytical Center Beijing Normal University 100875 Beijing China 4. Department of Physics Beijing Normal University 100875 Beijing China 5. key laboratory For Atomic and molecular Nanosciences Tsinghua University 100084 Beijing China

A multiple round quantum dense coding scheme based on the quantum phase estimation algorithm is proposed and implemented in a three qubit nuclear magnetic resonance (NMR) quantum computer. Using an m + 1 qubit system, Bob can transmit one of 2m+1 messages to Alice, through manipulating only one qubit and exchanging it between Alice and Bob for m rounds. The information capacity is enhanced to m + 1 bits as compared to m bits in a classical scheme. The scheme has been demonstrated in NMR system, and the experimental results show a good agreement between theory and experiment.

关键词： quantum dense coding, multiple round, nuclear magnetic resorance

ECSTM study of adsorption of C_(60),C_(70),C_(86) and Y@C_(82) on Au(111)

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Science china chemistry 2010年第8期53卷 1705-1710页

作者： SU GuiJin1,JIA ManKe1,GAN LiHua2 & SHI RuiFang1 1state key laboratory of Environmental chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,beijing 100085,china 2School of chemistry and Chemical engineering,Southwest university,Chongqing 400715,china 1. state key laboratory of Environmental chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China2. School of Chemistry and Chemical Engineering Southwest University Chongqing 400715 China

The adsorption of a variety of fullerenes (C60,C70,C86,Y@C82) on Au(111) electrode surfaces was comprehensively investigated in 0.1 M HClO4 by electrochemical scanning tunneling microscopy (ECSTM).In the ordered C60's adlayer,C60 molecules formed either (2(1/3) × 2 3～(1/3))or "in-phase" *** high resolution STM image shows that the C60 cage is not simply round but shows a bifurcated *** adsorption orientation of C60 on Au(111) is tentatively *** the ordered C70's adlayer,the perpendicular fullerene molecules are the main adsorption mode and form (2 3～(1/3) × 2 3～(1/3)) ***,for C86 and Y@C82,the ordered adlayer could not be obtained on Au(111) under the present *** differences may be due to the different molecular shapes and sizes,and the encapsulated metal atom which affects the lattice matches with the *** adsorption of fullerene molecules on Au(111) from disorder to order could be tuned simply by steering the dimensional sizes or shapes of the fullerenes used.

关键词： C60 C70 C86 Y@C82 ECSTM Au(111)