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Chinese Journal of Structural Chemistry 2019年第9期38卷 1537-1542页

作者： xue li-ping College of Food and Drug Luoyang Normal University

A new coordination polymer [Cu2(OH)(nbta)(tib)(H2 O)2]n(1, H3 nbta = 5-nitro-1,2,3-benzenetricarboxylic acid, tib = 1-(4 H-1,2,4-triazol-4-yl)-4-(imidazol-1-yl)benzene) constructed from dimeric Cu(Ⅱ) units has been synthesized under hydrothermal conditions and structurally characterized by single-crystal X-ray diffraction analysis. The compound crystallizes in monoclinic system, space group I2/c, with a = 17.8474(9), b = 11.7588(6), c = 21.9221(11) ?, β = 104.419(5)°, V = 4455.7(4) ?3 and Z = 8. Compound 1 is a three-dimensional structure constructed from dimeric Cu(Ⅱ) units and presents a 2-nodal(3,5)-connected net. Moreover, the thermal stability and solid UV-Vis absorption spectra have been investigated.

关键词： copper coordination polymer crystal structure topology UV–Vis absorption spectra

Synthesis, Structure and Luminescence Property of a New Two-dimensional Znic(Ⅱ) Coordination Polymer

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Chinese Journal of Structural Chemistry 2020年第7期39卷 1295-1300页

作者： xue li-ping DING Ke-Xin College of Food and Drug Luoyang Normal UniversityLuoyang 471934China College of Chemistry and Chemical Engineering Luoyang Normal UniversityLuoyang 471934China

Based on 5-dimethylamino-isophthalic acid(H2dia)and 1,2-bis(4-pyridyl)ethylene(bpe)mixed linkers,a new d10-configuration Zn(Ⅱ)coordination polymer material,[Zn(dia)(bpe)(H2O)]n(1),was *** the asymmetric unit,there are one Zn2+ion,two dia2-anions,one neutral bpe linker and one free H2O *** the complex,adjacent Zn2+ions are alternately bridged by the dia2-dianions to generate chains which are further connected by flexible bpe ligands to form a two-dimensional(2 D)layer *** topology,the structure of 1 represents a non-interpenetrating 4-connected sql ***,infrared spectroscopy,elemental analyses,thermogravimetric analysis,powder X-ray diffraction,solid UV-Vis absorption spectra and photoluminescent property of 1 are also investigated.

关键词： Zn coordination polymer crystal structure 5-dimethylamino-isophthalic acid 1,2-bis(4-pyridyl)ethylene UV-Vis absorption spectra luminescence property

Optimization of time-delayed feedback control of seismically excited building structures

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第3期9卷 330-337页

作者： xue-ping li Wei-qiu ZHU Zu-guang YING Department of Mechanics School of Aeronautics and Astronautics State Key Laboratory of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China

An optimization method for time-delayed feedback control of partially observable linear building structures subjected to seismic excitation is proposed. A time-delayed control problem of partially observable linear building structure under horizontal ground acceleration excitation is formulated and converted into that of completely observable linear structure by using separation principle. The time-delayed control forces are approximately expressed in terms of control forces without time delay. The control system is then governed by Itoe stochastic differential equations for the conditional means of system states and then transformed into those for the conditional means of modal energies by using the stochastic averaging method for quasi-Hamiltonian systems. The control law is assumed to be modal velocity feedback control with time delay and the unknown control gains are determined by the modal performance indices. A three-storey building structure is taken as example to illustrate the proposal method and the numerical results are confirmed by using Monte Carlo simulation.

关键词： Time-delayed feedback control Stochastic averaging method Hamiltonian Earthquake

Synthesis, Crystal Structure and Luminescence of a Cadmium(Ⅱ) Coordination Polymer with 3,6-Connected rtl Topology

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Chinese Journal of Structural Chemistry 2016年第2期35卷 293-297页

作者： xue li-ping SHAN li-li FENG Wen-Jing College of Chemistry and Chemical Engineering Luoyang Normal University

A new cadmium（Ⅱ） coordination polymer,[Cd（Hcna）2]n（1）,was hydrothermally synthesized based on 5-（4-carboxyphenoxy）nicotinic acid（H2cna） organic linker.X-ray singlecrystal diffraction determination reveals that 1 crystallizes in the monoclinic P21/c space group,with a = 10.101（2）,b = 7.9139（17）,c= 15.627（3） A,β= 103.364（3）°,V= 1215.4（4） A^3,Z=2,Mr= 628.81,Dc = 1.718 Mg/m^3,μ= 0.963 mm^（-1）,F（000） = 628,the final R = 0.0177 and wR = 0.0432 for 2263 observed reflections with I 〉2σ（I）.In 1,the Cd（Ⅱ） cations are connected by nicotiniate units to form a two-dimensional（2D） layer,and it is further linked through benzoate units to form a three-dimensional（3D） ***,the structure of 1 represents a 3,6-connected 3D rtl ***,thermal stability and photoluminescent property of 1 have also been investigated.

关键词： cadmium coordination polymer crystal structure 5-(4-carboxyphenoxy)nicotinic acid rtl topology luminescence

Hydrothermal Synthesis and Crystal Structure of a New Three-dimensional Co(Ⅱ) Coordination Polymer Based on 2,3-Thiophenedicarboxylic Acid

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Chinese Journal of Structural Chemistry 2013年第12期32卷 1854-1858页

作者： ZHANG Tian CHEN Xiu-Hua li Zhao-Hao xue li-ping College of Chemistry and Chemical Engineering Luoyang Normal University Department of Chemistry Zhengzhou University

A new Co（ll） polymer [Co（tdc）（l,4-bimb）]n 1 （H2tdc = thiophene-2,3-dicarboxy- lic acid, 1,4-bimb -- 1,4-bis（imidazol-1 ＇-yl）butane） was synthesized under hydrothermal conditions The compound crystallizes in the monoclinic system, space group C2/c with a = 15.643（9）, b = 8.839（5）, c=12.952（7） A, β = 105.964（6）°, V= 1721.8（16） A3, Z = 4, Mr = 419.32, Dc= 1.618 Mg/m3,μ = 1.149 mm-1, F（000） = 860, the final R = 0.0243 and wR =0.0613 for 1460 observed reflections with I 〉 2σ（I）. The compound presents a three-dimensional （3D） network extended by both tdc2- anions and 1,4-bimb ligands in which the tdc2- anions employ a chelating coordination mode. From the topology point of view, the structure could be described as a 3D 4-connected 65.8 CdSO4-type net. Infrared spectroscopy, elemental analyses, thermogravimetric analysis and powder X-ray diffraction properties of 1 are also investigated.

关键词： oordination polymer thiophene-2,3-dicarboxylic acid cobait(II) crystal structure

The 266-nm ultraviolet-beam generation of all-fiberized super-large-mode-area narrow-linewidth nanosecond amplifier with tunable pulse width and repetition rate

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Chinese Physics B 2022年第3期31卷 292-298页

作者： Shun li ping-xue li Min Yang Ke-Xin Yu Yun-Chen Zhu xue-Yan Dong Chuan-Fei Yao Institute of Ultrashort Pulsed Laser and Application Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China

We report on a compact, stable, all-fiberized narrow-linewidth(0.045 nm) pulsed laser source emitting laser beam with a wavelength of 266 nm, and tunable pulse width and repetition rate. The system is based on all-fiberized nanosecond amplifier architecture, which consists of Yb-doped fiber preamplifiers and a super-large-mode-area Yb-doped fiber power amplifier. The fiber amplifier with a core of 50 μm is used to raise the threshold of the stimulated Brillouin scattering(SBS) effect and to obtain high output power and single pulse energy. Using lithium triborate(LBO) crystal and betabarium borate(BBO) crystal for realizing the second-harmonic generation(SHG) and fourth-harmonic generation(FHG),we achieve 17 μJ(1.73 W) and 0.66 μJ(66 mW), respectively, at wavelengths of 532 nm and 266 nm and a repetition rate of 100 kHz with pulse width of 4 ns. This source has great potential applications in fluorescence research and solar-blind ultraviolet optical communication.

关键词： nanosecond all-fiber amplifier narrow-linewidth ultraviolet beam generation tunable pulse width and repetition rate

Photocatalytic Characterization of TiO_2 Supported on Active Carbon

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Chinese Chemical Letters 2001年第6期12卷 549-550页

作者： xue ping li Feng YIN Yuan liN Jing Bo ZHANG Xu Rui XIAO Laboratory of Photochemistry Center for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100080

The Photocatalytic characterization of TiO2 supported on active carbon was investigated for photocatalytic decomposition of dichloroacetic acid. It was found that TiO2 / AC exhibited a higher photocatalytic activity than pure TiO2. The reason is that active carbon acting as powerful adsorbent supports makes high concentration environments of organic pollutant molecules around TiO2 particles.

关键词： Photocatalysis TiO2 active carbon

Influence of optical nonlinearity on combining efficiency in ultrashort pulse fiber laser coherent combining system

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Chinese Physics B 2022年第6期31卷 342-348页

作者： Yun-Chen Zhu ping-xue li Chuan-Fei Yao Chun-Yong li Wen-Hao Xiong Shun li Institute of Ultrashort Pulsed Laser and Application Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Department of Physics Durham UniversitySouth RoadDurham DH13LEUK

The influence of optical nonlinearity on combining efficiency in ultrashort pulse fiber laser coherent combining system is investigated theoretically and *** the theoretical work,a new theoretical algorithm is presented for the coherent combining efficiency,which can be used to quantify the spectral coherence decay induced by optical nonlinearity imbalance between the *** spectral information of the sub-beam is obtained by numerically solving the nonlinear Schrödinger equation(NLSE)in this algorithm to ensure an accurate *** the experimental work,the coherent combining of two all-fiber picosecond lasers is achieved,and the influence of imbalanced optical nonlinearity on the combining efficiency is studied,which agrees with the theoretical *** paper reveals the physical mechanism for the influence of optical nonlinearity on the combining efficiency,which is valuable for the coherent combining of ultrashort pulse fiber laser beams.

关键词： coherent beam combination spectral coherence optical nonlinearity

Dual Z-scheme Bi_(3)TaO_(7)/Bi_(2)S_(3)/SnS_(2)photocatalyst with high performance for Cr(Ⅵ)reduction and TC degradation under visible light irradiation

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Rare Metals 2022年第7期41卷 2417-2428页

作者： Jing-Jing Xu Hao-Yu Gu Min-Dong Chen xue-ping li Hong-Wen Zhao Hong-Bin Yang Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Nanjing 210044China Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Nanjing 210044China Jiangsu Engineering Technology Research Center of Environmental Cleaning Materials Nanjing 210044China School of Environmental Science and Engineering Nanjing University of Information Science and TechnologyNanjing 210044China Nanyang Technological University Singapore 639798Singapore

Ternary direct dual Z-scheme Bi_(3)T_(a)O_(7)/Bi_(2)S_(3)/SnS_(2) photocatalyst was successfully prepared by hydrothermal *** composite photocatalysts exhibited high photocatalytic performance on both Cr(Ⅵ)reduction and tetracycline(TC)degradation under the irradiation of visible *** results manifested that the photogenerated charge transfer efficiency was improved after forming the dual Z-scheme *** a result,the composite catalysts exhibited higher photocat-alytic degradation efficiency than the corresponding single *** apparent rate constant(k)value of the best sample BBS-3 for TC degradation was 0.0403 min^(-1),which was 40 times,8 times,and 18 times higher than that of single *** the k value of BBS-3 for the Cr(Ⅵ)reduction was 0.0249 min^(-1),it was about 23 times,7 times,and 18 times that of single *** experiments indicated that the BBS-3 had good photocat-alytic ***,the possible mechanism on Cr(Ⅵ)reduction and TC degradation was proposed based on the experimental results.

关键词： Photocatalysis Dual Z-scheme Heterojunction Heavy metal Organic pollutant

An All-Fiberized Chirped Pulse Amplification System Based on Chirped Fiber Bragg Grating Stretcher and Compressor

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Chinese Physics Letters 2022年第2期39卷 36-42页

作者： Ming-Xiao Wang ping-xue li Yang-Tao Xu Yun-Chen Zhu Shun li Chuan-Fei Yao Institute of Ultrashort Pulsed Laser and Application Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China

We report an all-fiberized chirped pulse amplification system without any bulk *** stretcher and compressor are chirped fiber Bragg gratings inscribed in a 6/125μm single-mode fiber and a 30/250μm largemode-area *** fabrication system of chirped fiber Bragg gratings was designed and built by *** width of the linear exposure spot was controlled according to the different fiber sizes to improve the fabrication quality,and the parameters of chirped fiber Bragg gratings were fine-tuned during the fabrication to achieve the overall system’s spectral *** fiber circulators with the same fiber sizes as the chirped fiber Bragg gratings were employed to auxiliarily achieve the pulse stretching and *** dispersion accumulations provided by the stretcher and compressor are 129.8 ps and 90.8 *** power amplifiers were composed of the two-stage 10/130μm fiber pre-amplifier and the 30/250μm fiber main *** proposed chirped pulse amplification system with no spatial light is the true sense of an all-fiberized chirped pulse amplification structure and shows the main trend in development of ultrashort pulse fiber lasers.

关键词： fiber amplifier compressor