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CCS Chemistry 2024年第8期6卷 1978-1986页

作者： Cheng-Peng Liang Jia-Run Huang Hao-Lin Zhu zhen-Hua Zhao Can Yu Pei-Qin Liao xiao-Ming Chen MOE Key laboratory of Bioinorganic and Synthetic Chemistry GBRCE for Functional Molecular EngineeringSchool of ChemistrySun Yat-sen UniversityGuangzhouGuangdong 510275 Institute of High Energy physics Chinese Academy of Sciences(CAS)Beijing 100049

Precise regulation of the coordination environment of a metal active center is very important but remains a ***,single-atom Ni catalysts with a combined N-and C-coordination structure(Ni-NC_(3.)and N-coordination structure(Ni-N4)were prepared by modulating the side groups of organic ligands in the corresponding precursor metal–azolate *** with the Ni-N4 site,the d-band center of 3. orbitals of the Ni atom in Ni-NC_(3.was more significantly shifted to the Fermi energy level;thus,the Ni-NC_(3.catalytic site was superior to activating CO_(2)molecule into the*COOH *** a result,Ni-NC_(3.exhibited an exceptionally high performance for CO_(2)-to-CO conversion with a Faradaic efficiency of 98.4%,an energy efficiency of>50%,as well as an industrial current density of∼3.0 mA cm^(−2) in neutral *** high performance could be retained for at least 70 *** work reveals the importance of modulating the coordination environment in the electrochemical CO_(2)reduction reaction and provides a possible way to rational design of electrocatalysts for highly efficient conversion of CO_(2)to target products.

关键词： single-atom Ni catalysts first coordination shell porous nitrogen-doped carbon electrochemical CO_(2)reduction reaction coordination environment

GRAFTING-FROM AND GRAFTING-TO APPROACHES ON PREPARATION OF PET- PALYGORSKITE NANOCOMPOSITES

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GRAFTING-FROM AND GRAFTING-TO APPROACHES ON PREPARATION OF P...

TOUGHENING AND REINFORCING OF NYLON 66 WITH ORGANOCLAY AND MALEATED ELASTOMER

第三届工程塑料国际学术研讨会

作者： Xuepei Yuan 1 2 Chuncheng Li 1 Guohu Guan1 Yaonan xiao1 Dong Zhang1 1 laboratory of Engineering Plastics Joint laboratory of {3. Science and Materials center for molecular Science Institute of Chemistry chinese academy of sciences beijing 100080 P. R. china 2 Graduate School of the chinese academy of sciences beijing 10003. P.R china

＜正＞Compared with other polymers, such as polyamide and epoxide, etc., preparation of PET/clay nanocomposites is not successful. The relative higher processing temperature of PET usually results in

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TOUGHENING AND REINFORCING OF NYLON 66 WITH ORGANOCLAY AND M...

Preparation and Structure-Property Regulation Mechanism of Reversible Thermochromic Polydiacetylene

Third East Asian polymer Conference

作者： Zhong-zhen Yu, Mingshu yang, Qing-Xin Zhang, xiao-Lin Xie, Yiu-Wing Mai {3. for Advanced Materials Technology, School of Aerospace, Mechanical and Mechatronic Engineering J07, The University of Sydney, Sydney, NSW 2006, Australia {3. for molecular Science, Institute of Chemistry, The chinese academy of sciences, P.O. Box 2709, beijing 100080, china

Recently, polymer/clay nanocomposites are extensively studied in terms of their mechanical, thermal, gas barrier, and flame retardant properties because of their wide spread applications. Kojima et al. prepared exfoliated nylon 6/clay nanocomposites by in situ polymerization that exhibited increased stiffness and tensile strength, improved solvent resistance, and enhanced gas barrier properties even at low weight fractions of clay. This was attributed to the high aspect ratio of clay layers and the presence of large interfacial area between clay and polymer matrix. In another study, fully exfoliated nylon 6/clay nanocomposites were produced by melt compounding of commercial nylon 6 resin with organoclay. The complete exfoliation of clay optimized the number of available reinforcing elements. The tensile strength and stiffness were dramatically increased as the amount of organoclay increased. On the other hand, with the increase of organoclay content, especially, beyond 5

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chinese Journal of polymer Science 2024年第8期42卷 1111-1121页

作者： Zhi-Qing Ge Shuo Yan Zu-Xiong Pan Shan Lei Xuan-Zhi Mao Chu Zhao Mo-zhen Wang Xue-Wu Ge Key laboratory of Precision and Intelligent Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China Marshall laboratory of Biomedical Engineering International Cancer CenterLaboratory of Evolutionary Theranostics(LET)School of Biomedical EngineeringShenzhen University Medical SchoolShenzhen UniversityShenzhen 518055China Shanghai Institute of Applied physics Chinese Academy of SciencesShanghai 201800China University of chinese academy of sciences Beijing 100049China

The thermochromic mechanism and the structure-property regulation principle of reversible thermochromic polydiacetylene(PDA)materials have always been a challenging *** this work,a series of diacetylene monomers(m-PCDA)containing phenyl and amide or carboxyl groups were synthesized from 10,12-pentacosadiynoic acid(PCDA)through the esterification or amidation *** effects of the number and the distribution of the functional groups in m-PCDA molecules on their solid-state polymerization capability,and the thermochromic mechanism of their corresponding polymers(m-PDA)were investigated and discussed in *** results show that the m-PCDA monomers containing both benzene ring and groups that can form hydrogen bonding interactions have strong intermolecular interaction,and are easy to carry out the solid phase polymerization under 254-nm UV irradiation to obtain the corresponding new thermochromic m-PDA *** thermochromic behavior of m-PDA depends on its melting *** initial color-change temperature(blue to red)is determined by the onset melting tem perature,and the temperature range in which reversible color recovery can be achieved by repeat heating-cooling treatment is determined by its melting *** to the proposed thermochromic mechanism of PDA,various new PDA materials with precise thermochromic temperatu res and reversible thermochromic temperature ra nges can be designed and synthesized through the appropriate introduction of benzene ring and groups that can form hydrogen bonding interactions into the molecular structure of linear diacetylene *** work provides a perspective to the precise molecular structure design and the property regulation of the reversible thermochromic PDA materials.

关键词： Polydiacetylene Thermochromism Hydrogen bonding Chemical modification

SCIRRIO exerts its neurotrophic activity through thyrotropin releasing hormone receptor 2

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Role of Hydrodynamic Interactions in the Deformation of Star polymers in Poiseuille Flow

中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： Yong LIU~1,xiao-Yan SHI~1,Hai-Ping QUE~1,Yu WANG~(1,3.,Yan-Li NI~1,zhen-Lian MA~1,Xin LI~1,Tao LIU~1,Zhi-Yi ZHANG~4,Shu-Qian JING~(1,2),Shao-Jun LIU~(1,*) 1 Department of Neurobiology,Institute of Basic Medical sciences,{3. of Military Medical sciences,27 Taiping Road,beijing 100850,china 2 Department of Clinical Immunology,Amgen Inc.,Thousand Oaks,CA,USA 3.State Key laboratory of polymer physics and Chemistry,Changchun Institute of Applied Chemistry,chinese {3. of sciences,5625 Renmin Road,Changchun 13.022,china 4 chinese National center of Biomedical Analysis,27 Taiping Road,beijing 100850,china

＜正＞Spinal cord injury and regeneration related gene No 10（SCIRR10）was first identified as an EST in our efforts of seeking genes responsive to spinal cord neuron *** levels of SCIRRIO mRNA expression were detected in adult CNS and several other *** injured spinal cord,the level of SCIRRIO expression was temporally elevated.A His-tagged-SCIRR10 affinity column was able to capture thyrotropin releasing hormone receptor 2（TRHR2）from spinal cord lysates,suggesting that SCIRR10 interacted with *** interaction between SCIRR10 and TRHR2 was further confirmed by the co-localization of a GFP-SCIRR10 fusion protein with RFP-TRHR2 fusion protein expressed on COS7 *** PC12 cells,recombinant SCIRR10 and conditional medium containing SCIRR10 induced activation of the phospholipase C and MAPK pathways,the major signal transduction pathways shared by *** SCIRR10 protein and conditional medium containing SCIRR10 also enhanced the sprouting and growth of neurites from cultured embryonic rat cortex *** biological function to promote neurite growth could be interdicted with pertussis *** data demonstrated that SCIRR10 is a novel neurotrophic factor that may play an important role in the regeneration of CNS injury.

关键词： SCIRR10 TRHR2 neural regeneration

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chinese Journal of polymer Science 2020年第4期38卷 363-370,I0006页

作者： zhen-Yue yang xiao-Fei Tian Li-Jun Liu Ji-Zhong Chen State Key laboratory of polymer physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of chinese academy of sciences Beijing 100049China

Stretching polymer in fluid flow is a vital process for studying and utilizing the physical properties of these molecules,such as DNA linearization in nanofluidic *** studied the role of hydrodynamic interactions(His)in stretching a free star polymer in Poiseuille flow through a tube using mesoscale hydrodynamic *** increasing the flow strength,star polymers migrate toward the {3.line of tube due to His,whereas toward the tube wall in the absence of *** analyzing the end monomer distribution and the perturbed flow around the star polymer,we found that the polymer acts like a shield against the flow,leading to additional hydrodynamic drag forces that compress the arm chains in the front of the star {3. toward the tube axis and lift the arm chai ns at the back toward the tube *** balanced hydrodynamic forces freeze the polymer into a trumpet structure,where the arm chains maintain a steady strongly stretched state at high flow *** contrast,the polymer displays remarkably large conformational change when switching off *** simulation results explained the coupling between His and the structure of star polymers in Poiseuille flow.

关键词： Hydrodynamic interactions Star polymer Poiseuille flow Migration

molecular Dynamics Simulation of Glass Transition Behavior of Polyimide Ensemble

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chinese Chemical Letters 2001年第9期12卷 827-828页

作者： Tai Ning LIANG Xiang Yu ZHANG xiao zhen yang State Key laboratory of polymer physics and Chemistry Center for Molecular ScienceInstitute of ChemistryChinese Academy of SciencesBeijing 100080 Institute of Chemistry&Engineering Heilongjian UniversityHarbin 150089

The effect of chromophores to the glass transition temperature of polyimide ensemble has been investigated by means of molecular dynamics simulation in conjunction with barrier analysis. Simulated Tg results indicated a good agreement with experimental value. This study showed the MD simulation could estimate the effect of chromophores to the Tg of polyimide ensemble conveniently and an estimation approach method had a surprising deviation of Tg from experiment. At the same time, a polyimide structure with higher barrier energy was designed and validated by MD simulation.

关键词： Glass transition temperature molecular dynamics simulation

Scheme for Direct Measurement of Wigner Characteristic Function for Motion of a Single Trapped Ion

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Communications in Theoretical physics 2006年第2X期46卷 306-308页

作者： ZHANG Su-zhen XIE xiao-Tao yang Wen-Xin Department of physics Huazhong University of Science and Technology Wuhan 430074 China State Key laboratory of Magnetic Resonance and Atomic and molecular physics Center for Cold Atom Physics Wuhan Institute of Physics and Mathematics the Chinese Academy of Sciences Wuhan 430071 China Graduate School the Chinese Academy of Sciences Beijing 100080 China

In this paper, a procedure is proposed for measuring Wigner characteristic function for motion of a single trapped ion. In the scheme, the trapped ion is driven by two laser beams with different frequencies tuned to the first lower and upper vibrational sidebands, respectively. Unlike other previous scheme, our scheme does not require the displacement of the external state before the ion-laser interaction and thus our scheme night be more simple and feasible. The scheme can also be used to prepare the motional Schroedinger cat states and entangled coherent states.

关键词： Wigner characteristic function trapped ion

Conformation of 1,2-Dimethoxyethane in Water

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Chemical Research in chinese Universities 2001年第3期17卷 315-317页

作者： LIU Yue yang xiao-zhen DAI Bai-qing SU Zhong-min WANG Qi Institute of Opto-electronics Harbin Institute of TechnologyHarbin 150001P.R.China polymer physics laboratory Institute of ChemistryAcademia SinicaBeijing 100080P.R.China Department of Chemistry Harbin Normal UniversityHarbin 150080P.R.China Department of Chemistry Northeast Normal universityChangchun 130024P.R.China

To understand the conformation of 1,2-dimethoxyethane (DME) in water, a system of two kinds of molecules, DME and H_2O, was focused. The interaction of various conformers of DME with water was studied by means of ab initio molecular orbital calculation with 6-3.G (d) basis set. It is shown that there are two forms of interactions between the two molecules in the system, the close touched (H_2O attaches to the two oxygen atoms of DME) and the open touched (H_2O attaches to one oxygen atom of DME) structures. The conformation of DME is remarkably influenced by the interactions. Instead the ttt conformer is preferred in the gas state, with a close touched H_2O the tgt conformer becomes the most stable one. The obtained hydration energies show that the stabilized order of DME conformers by water is tgt>tgg′>ttt.

关键词： 1 2-Dimethoxyethane Conformation Ab initio molecular orbital calculation

Full Quantum Theory of molecular Hot-Electroluminescence in Scanning Tunneling Microscope Tunnel Junctions

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chinese Journal of Chemical physics 2015年第5期28卷 -页

作者： Gong Chen xiao-guang Li zhen-chao Dong International center for Quantum Design of Functional Materials Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China Hefei 230026 China International center for Quantum Design of Functional Materials Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China Hefei 230026 ChinaShenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055China

The pursuit of nanoscale photonics and molecular optoelectronics has stimulated a lot of interests in scanning tunneling microscope(STM) induced molecular emission. In this work, we have introduced a full quantum mechanical approach instead of the previous semiclassical theory to consider the quantized surface plasmon modes in this system. By considering the mutual interactions between a single molecule and the quantized surface plasmon, we have studied the molecular electroluminescence from STMtunnel junctions. Due to the coupling to the surface plasmons, the spontaneous emission rate and the fluorescence intensity of the molecule are both enormously enhanced. In particular, we show that when the radiative decay rate becomes comparable to the vibrational damping rate, hot-electroluminescence can be observed. All these findings are believed to be instructive for further developments of both molecular electronics and photonics.

关键词： Scanning tunneling microscope induced luminescence Master equation Surface plasmon Hot-electroluminescence