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Chinese Chemical Letters 2023年第3期34卷 498-501页

作者： Jiang-Zhen Qiu Ye Yu Zhuo-Fan Chen Min Zhu Yongxia Lu Qinwu Wu long-fei wang Jiang Liu College of Chemistry and Chemical Engineering Zhongkai University of Agriculture and EngineeringGuangzhou 510225China Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of ChemistrySun Yat-sen UniversityGuangzhou 510006China c School of Chemistry South China Normal UniversityGuangzhou 510006China

A cadmium tetracyanoplatinate host clathrate,(MV)[Cd_(2){Pt(CN)_(4)}_(3)]·2(H_(2)O)(1),including a methylviologen dication (MV^(2+)) was synthesized,and the crystal structures,photochromic and photoluminescence properties were *** 1,the alternatively parallel stacking between the MV^(2+)dications as electron acceptors in the channels and the electron donors[Pt1(CN)_(4)]^(2-) units in the host frameworks give a unique donor-acceptor (DA) *** UV irradiation,the electron transfer between MV^(2+) and[Pt(CN)_(4)]^(2-) ions generates MV^(·+)radicals with a photochromic behavior from pale-yellow to *** process occurs through single-crystal-to-single-crystal (SCSC) transformation and obvious structure variation of viologen cations is successfully ***,the spectral overlap between the emission bands of 1 and the absorption around 623 nm for the MV^(·+) radicals leads to a modulation of the photoluminescence.

关键词： Methylviologen dication Cadmium Polycyanidometallate clathrate Photochromism Photoluminescence

Reversible on-off switching of spin-crossover behavior via photochemical [2+2] cycloaddition reaction

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Science China Chemistry 2022年第1期65卷 120-127页

作者： long-fei wang Bang-Heng Lv Feng-Tai Wu Guo-Zhang Huang Ze-Yu Ruan Yan-Cong Chen Min Liu Zhao-Ping Ni Ming-Liang Tong Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of ChemistrySun Yat-Sen UniversityGuangzhou 510006China School of Nuclear Science and Technology University of South ChinaHengyang 421001China

Herein,we report the first example showing the reversible on-off switching of spin-crossover(SCO)property by solid state photochemical[2+2]*** ultraviolet(UV)light-induced[2+2]cycloaddition reaction of 3-spy ligands in a twodimensional(2D)Hofmann-type framework[Fe(3-spy)_(2){Pd(CN)_(4)}](1,3-spy=3-styrylpyridine),which shows a hysteretic twostep SCO behavior,gives a 3D Hofmann-type framework[Fe(rctt-3-ppcb){Pd(CN)_(4)}](2,rctt-3-ppcb=rctt-1,3-bis(3-pyridyl)-2,4-bis(phenyl)cyclobutane,r=reference group,c=cis and t=trans)accompanied with the disappearing of SCO ***,upon heating at 250℃ for 12 h,the rctt-3-ppcb ligand in 2 could be partially dedimerized to 3-spy with 68%completion through single-crystal-to-single-crystal(SCSC)transformation,giving the annealing complexes[Fe(3-spy)1.36(rctt-3-ppcb)0.32{Pd(CN)_(4)}](3)which display an incomplete SCO *** 2■3 interconversion is successfully achieved via continuous UV irradiation and thermal annealing,demonstrating the effectiveness of photochemical[2+2]reaction on switching on-off SCO properties.

关键词： reversible photo cycloaddition spin-crossover Hofmann-type frameworks photomagnetism

Effect of aeration on fast gas pressure tests

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Mining Science and Technology 2009年第6期19卷 756-760页

作者： CHEN Yu-jia JIANG Cheng-lin LI Xiao-wei TANG Jun wang Chen YANG fei-long wang Fa-kai ZHANG Chao-jie DENG Shu-hua School of Safety Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

Given the problem of the long time required for testing gas pressure, we propose a fast-test method in which we used a technique of fast borehole sealing and air replenishing. Based on the characteristics of gas emission from boreholes to be tested, we built a theoretical model for calculating parameters during the process of increasing natural pressure and aeration. Using this model, we investigated the effect of different aeration conditions on velocity of pressure tests. The result shows that: 1) aerating air into boreholes can speed up gas pressure tests and 2) the more similar the pressure of the aerated air to the original gas pressure, the smaller the gas volume absorbed by coal and the shorter the time needed in pressure test. A case study in the Lu’an mining area shows that the time needed for gas pressure test is only 4 h using our method of aeration and 29 h under conditions of increasing natural pressure, saving time by 86.2%. This case study also indicates that, by using the aeration method, only one hour is needed for gas pressure to reach a stable state, which breaks the record of the shortest time needed for gas pressure tests in China.

关键词： aeration gas pressure fast test aeration pressure adsorption quantity

Quick determination of gas pressure before uncovering coal in cross-cuts and shafts

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Journal of China University of Mining and Technology 2008年第4期18卷 494-499页

作者： JIANG Cheng-lin wang Chen LI Xiao-wei CHEN Yu-jia XIE Qing-xue LIU Ying TANG Jun YANG fei-long wang Fa-kai DENG Su-hua ZHANG Chao-jie CHENG Song-li LV Shu-wen School of Safety Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

The determination of gas pressure before uncovering coal in cross-cuts and in shafts is one of the important steps in pre- dicting coal and gas outbursts. However, the time spent for testing gas pressure is, at present, very long, seriously affecting the ap- plication of outburst prediction techniques in opening coal seams in cross-cuts and shafts. In order to reduce the time needed in gas pressure tests and to improve the accuracy of tests, we analyzed the process of gas pressure tests and examined the effect of the length of boreholes in coal seams in tests. The result shows that 1) the shorter the borehole, the easier the real pressure value of gas can be obtained and 2) the main factors affecting the time spent in gas pressure tests are the length of the borehole in coal seams, the gas emission time after the borehole has been formed and the quality of the borehole-sealing. The longer the length of the bore- hole, the longer the gas emission time and the larger the pressure-relief circle formed around the borehole, the longer the time needed for pressure tests. By controlling the length of the borehole in a test case in the Huainan mining area, and adopting a quick sealing technique using a sticky liquid method, the sealing quality was clearly improved and the gas emission time as well as the amount of gas discharged greatly decreased. Before the method described, the time required for the gas pressure to increase during the pressure test process, was more than 10 days. With our new method the required time is only 5 hours. In addition, the accuracy of the gas pressure test is greatly improved.

关键词： gas pressure sticky liquid sealing quick test cross-cut shaft

Modulation of single-molecule magnet behavior via photochemical [2+2] cycloaddition

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Modulation of single-molecule magnet behavior via photochemi...

Numerical simulation and experimental verification of large-sized Zr-based bulk metallic glass ring-shaped parts in casting process

中国化学会第七届全国结构化学学术会议

作者： long-fei wang Eliseo Ruiz Ming-Liang Tong Departament de Química Inorgànica and Institut de Recerca de Química Teòrica i Computacional Universitat de Barcelona School of Chemistry & Chemical Engineering Sun Yat-Sen University

The first example of phototunable SMM has been *** on the potential[2+2]photodimerization reaction of bpe(bpe=1,2-bis(4-pyridyl)ethene)ligands,we successfully synthesized a mononuclear Dy(Ⅲ)-based complex,[Dy(bpe)(HO)(NO)]NO·2bpe(1),in which the coordinated bpe underwent[2+2]transformations upon UV irradiation,leading to an

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Transactions of Nonferrous Metals Society of China 2022年第2期32卷 581-592页

作者： fei-long wang Qiu-hong HAO Peng-fei YU Yu-jing YANG Ming-zhen MA Xin-yu ZHANG Ri-ping LIU State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China Wuhan Hgcyber Data System Co. Ltd.Wuhan 430223China Department of Physics Hebei Normal University of Science and TechnologyQinhuangdao 066004China

An outer ring of 29320 self-aliging roller bearing was used in an experimental study on the casting of Zr_(41)Ti_(14)Cu_(12.5)Ni_(10)Be_(22.5) amorphous *** simulations of mold filling and solidification processes were carried out to determine the velocity fields and temperature fields of the alloy melt during mold filling process as well as the temperature fields and temperature gradient fields in the course of the *** to the results,a cast with a complete shape can be obtained at 1200℃under the condition that the cooling rate is greater than the critical cooling *** ring-shaped part with a thickness of 25 mm,an equivalent diameter of 22 mm,and a mass of 1.32 kg was prepared by gravity casting in a copper mold.X-ray diffraction and differential scanning calorimetry data revealed that the produced cast had the amorphous structure.

关键词： bulk metallic glasses ring-shaped part casting forming numerical simulation mold filling solidification

Improving oxidation resistance of porous FeAl-based intermetallics with high boron/yttrium alloying

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Transactions of Nonferrous Metals Society of China 2022年第8期32卷 2620-2633页

作者： Hui-bin ZHANG Hang YU Jun-liang MA long-fei wang Sheng-hang XU Guo-qu ZHENG College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China

The coalloying with high contents of chromium(Cr),boron(B)and yttrium(Y)for porous B2-structured FeAl intermetallics fabricated through reactive synthesis was *** oxidation behaviors of porous FeAl-based materials were investigated by evaluating the pore-structure evolution,oxidation kinetics and oxide-scale *** results show that with the coalloying of high contents of Cr,B and Y,the oxidation mass gains of porous FeAl materials at 600−800℃ are significantly *** combination of B enriched on the surface of oxide scales and Y located at the scale−metal interface promotes the formation of thin protective nodularα-Al_(2)O_(3) oxide *** is indicated that introducing relatively high contents of reactive elements such as B and Y can benefit the selective growth ofα-Al_(2)O_(3) scales at relatively low temperatures without pre-treatment.

关键词： FeAl intermetallics yttrium high-temperature filter material oxidation porous material

A comprehensive magnetic study of a family of pillar-layered frameworks with analogous Kagomé layers

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A comprehensive magnetic study of a family of pillar-layered...

Optimizing the key parameter to accelerate the recovery of AMOC under a rapid increase of greenhouse gas forcing

中国化学会第九届全国无机化学学术会议

作者： long-fei wang Cui-Jin Li Yan-Cong Chen Ming-Liang Tong School of Chemistry & Chemical Engineering Sun Yat-Sen University College of Chemistry and Chemical Engineering Zhongkai University of Agriculture and Engineering

Based on the analogous kagomé[Co3（imda）2]layers,a family of pillar-layered frameworks with the formula of[Co3（imda）2（pillar）3]·（pillar）n·x H2O have been successfully synthesized by hydrothermal/solvothermal method（imda=imidazole-4,5-dicarboxylate;for 1,pillar=pyz=pyrazine,n=0,x=8;for 2,pillar=4,4-bpy=4,4-bipyridine,n=1,x=8;for 3,pillar=1,4-dpb=1,4-di（pyridin-4-yl）benzene,n=1,x=13;for 4,pillar=4,4’-dpbp=4,4’-di（pyridin-4-yl）-1,1’-biphenyl,n=1,x=14）.Single crystal structral analysis shows an significant increase of the interlayer distances synchronized with the extention of the pillar ligands,namely 7.092（3）（1）,10.921（6）（2）,14.780（5）（3）and 19.165（4）（4）.Despite the wrinkled kagomélayers in complexes 2-4,the comprehensive magnetic characterizations revealed the weaken of interlayer magnetic interactions and the increase of degree of frustration from 1 to 4,which lead to the characteristic magnetic ground states.[1,2]

关键词： Spin frustration Kagomé lattice pillar-layered framework magnetism

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 39-45页

作者： Haolan Ren fei Zheng Tingwei Cao Qiang wang International Center for Climate and Environment Science(ICCES) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina College of Oceanography Hohai UniversityNanjingChina CAS Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of Sciences and Pilot National Laboratory for Marine Science and Technology(Qingdao)QingdaoChina

Atlantic Meridional Overturning Circulation(AMOC)plays a central role in long-term climate variations through its heat and freshwater transports,which can collapse under a rapid increase of greenhouse gas forcing in climate *** studies have suggested that the deviation of model parameters is one of the major factors in inducing inaccurate AMOC *** this work,with a low-resolution earth system model,the authors try to explore whether a reasonable adjustment of the key model parameter can help to re-establish the AMOC after its *** a new optimization strategy,the extra freshwater flux(FWF)parameter is determined to be the dominant one affecting the AMOC’s *** traditional ensemble optimal interpolation(EnOI)data assimilation and new machine learning methods are adopted to optimize the FWF parameter in an abrupt 4×CO_(2) forcing experiment to improve the adaptability of model parameters and accelerate the recovery of *** results show that,under an abrupt 4×CO_(2) forcing in millennial simulations,the AMOC will first collapse and then re-establish by the default FWF parameter ***,during the parameter adjustment process,the saltier and colder sea water over the North Atlantic region are the dominant factors in usefully improving the adaptability of the FWF parameter and accelerating the recovery of AMOC,according to their physical relationship with FWF on the interdecadal timescale.

关键词： Recovery of AMOC 4×CO_(2)forcing Key parameter Parameter estimation Data assimilation Machine learning

普惠金融发展评价及影响因素分析——以四川省为例

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技术经济与管理研究 2017年第10期 82-85页

作者：龙云飞王丹攀枝花学院经济与管理学院四川攀枝花617000

发展普惠金融是我国经济进入"新常态"后金融领域的重大战略,文章运用四川省2004-2015年金融发展数据,从普惠金融的三个维度选取八项指标,通过采用变异系数法确定指标权重,构建普惠金融发展评价指数对,对四川普惠金融发展情况进行了研究... 详细信息

发展普惠金融是我国经济进入"新常态"后金融领域的重大战略,文章运用四川省2004-2015年金融发展数据,从普惠金融的三个维度选取八项指标,通过采用变异系数法确定指标权重,构建普惠金融发展评价指数对,对四川普惠金融发展情况进行了研究,报告了四川省普惠金融发展呈现良好态势,普惠金融指数逐年上升的现状。通过采用灰色关联方法,对影响四川普惠金融发展的相关因素展开调查,计算了各影响因素与普惠金融指数的灰色关联系数,探讨影响普惠金融发展的主要因素,认为地区教育水平、收入水平和信息化水平等因素对普惠金融发展影响较大,提出增加金融供给、加快金融创新、强化金融保护等政策建议,以期实现促进地区普惠金融发展的研究目的。

关键词：普惠金融金融供给新常态金融创新