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The Synthesis and Film Forming Properties of Unsymmetrical Phthalocyanine Bearing One Crown Ether Void

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chinese Chemical Letters 1997年第9期8卷 815-818页

作者： Xi You LI Guo Xiang XIONG hui jun xu(The institute of photographic chemistry, chinese academy of sciences. beijing 100101) institute of photographic chemistry Chinese Academy of Sciences Beijing 100101 China

The synthesis of phthalocyanines bearing one crown ether macrocycle and three alkoxyl chains is described. They form stable monolayers and can be employed for the preparation of multilayer films by the Langmuir-Blogett technique. The orientations of the molecules in the film were affected by alkali metal ions in the subphase. lt is suggested that a kind of 'sandwich' dimer was formed in the film induced by potassium ions

关键词： HNMR MS Figure The Synthesis and Film Forming Properties of Unsymmetrical Phthalocyanine Bearing One Crown Ether Void

The Mixed LB film of Crowned Phthalocyanine and Picrate

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chinese Chemical Letters 1998年第6期9卷 573-575页

作者： Xi You LI hui jun xu(institute of photographic Chendstry, chinese academy of sciences, beijing 100101) chinese Acad Sci Inst Photog Chem Beijing 100101 Peoples R China

The mixed LB film of mono crown ether substituted phthalocyanine (CPc) and potassium picrate (PiK) were prepared by adding potassium picrate in subphase. The pi-A isotherms show that the addition of PiK in subphase increases the orientation angles of phthalocyanine in monolayers. The absorption spectra revealed that the monolayer can be transferred to substrates easily. X-ray diffraction results show that the mixed film possesses the same thickness as that of pure phthalocyanine film.

关键词： mono crown ether phthalocyanine LB film picrate

Synthesis, complexation properties and crystal structure of 4',5'-dibromo-oxylyl-17-crown-5 ether

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chinese Journal of chemistry 1996年第5期14卷 447-453页

作者： XIONG,Guo-Xiang ZHOU,Qing-Fu xu,hui-juninstitute of photographic chemistry,chinese academy of sciences,beijing 100101,China institute of photographic chemistry Chinese Academy of Sciences Beijing 100101 China

4',5'-Dibromo-o-xylyl-17-crown-5 ether (2BrB17C5) was synthesized,starting from 1,2-dibromo-4,5-bis(bromomethyl)-benzene and tetraethylene glycol,and was characterized by 1H NMR,MS and elemental *** yellow prismatic single crystal obtained from anhydrous ethanol was investigated by X-ray structural *** complexation properties toward alkali metal ions were examined using the solvent extraction method and UV absorption *** crown ether was found to be conformationally deformed and oblate-like and is highly selective for lithium ion.

关键词： Crown ether complexation crystal structure

Synthesis and Effect of Cation Binding on Photophysical Properties of 1,8-Anthraceno-18-Crown-5

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chinese Chemical Letters 1999年第12期10卷 0-0,0-0页

作者： Hua JIANG hui jun xu Pei Jie XIA Qing Fu ZHOU(Laboratory of Photochemistry, institute of photographic chemistry,chinese academy of sciences, beijing 100101) chinese Acad Sci Inst Photog Chem Lab Photochem Beijing 100101 Peoples R China

A new type of anthracene crown ether 1, 8-anthraceno-18-crown-5 has been synthesizedand the photophysical properties upon complexation with alkali and alkaline-earth metal canonswere investigated. The fiuorescence quantum yield and lifetime are appreciably enhanced, and thestability constant Ks were determined by fluorometric titration. It was found that the magnitude ofKs is controlled by the size and charge density of the complexed canons.

关键词： Crown ether photophysical property canon-binding.

Quenching of zinc phthalocyanine excited states by viologen surfactant assemblies——The influence of microenvironment

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chinese Journal of chemistry 1993年第2期11卷 120-125页

作者： LIU,Ji-Xiang ZHOU,Qing-Fu xu,hui-jun institute of Photoyraphic chemistry,chinese academy of sciences,beijing 100101 institute of photographic chemistry Chinese Academy of Sciences Beijing 100101

A series of functional surfactants of N-alkyl-N'-butyl viologens has been synthesized. The quenching of excited singlet and triplet states of zinc phthalocyanine was studied in DMSO and in mixed micelles containing the functional surfactant as one and cationic cetyl trimethylam- monium bromide(CTAB),anionic sodium dodecylsulfate(SDS)and neutral TX-100 surfactant as the other *** quenching and laser photolysis studies indicate that the functional surfactants are solubilized at different sites in micelles,the process depends on chain length and exerts great influence on the quenching of zinc phthalocyanine excited states.

关键词： CTAB nm Quenching of zinc phthalocyanine excited states by viologen surfactant assemblies The influence of microenvironment

SYNTHESIS AND CRYSTAL STRUCTURE OF 4,5-DIBROMO-o-OXYLYL-17-CROWN-5

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chinese Chemical Letters 1996年第8期7卷 699-700页

作者： Guo chang XIONG Qing Fu ZHOU hui jun xu(institute of photographic chemistry, chemistry, Academia Sinica, beijing 100101) ACAD SINICA INST PHOTOG CHEMBEIJING 100101PEOPLES R CHINA

The title compound [C16H22Br2O5] (3), was synthesized and characterized by H-1-NMR, MS and elemental analysis. Pale yellow prism crystallized from anhydrous ethanol solution was investigated by X-ray structural analysis. Crystal data: orthorhombic system space group Pbca, Mr=454.2, a=17.664(4)Angstrom b=8.625(2)Angstrom, c=24.269(5)Angstrom, z=8, Dc=1.632g/cm(3), F(000)=1776. The structure was solved by direct methods and refined to final R=0.0362, Rw=0.0357 for 1029 observed reflections with F>6.0 sigma(F).

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Hot Deformation Behavior of Ti-6Al-4V-0.5Ni-0.5Nb Titanium Alloy

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Journal of Wuhan University of Technology(Materials Science) 2024年第5期39卷 1270-1277页

作者： ZHU Guochuan LIU Qiang SONG Shengyin hui Songxiao YU Yang YE Wenjun QI jun TANG Zhengwei xu Penghai CNPC Tubular Goods Research institute Xi’an 710077China State Key Laboratory for Fabrication&Processing of Nonferrous Metals Beijing General Research Institute for Nonferrous MetalsBeijing 100088China China Petroleum Tarim Oilfield Company Korla 841000China

Characterization of hot deformation behavior of Ti-6Al-4V-0.5Ni-0.5Nb titanium alloy was investigated through isothermal compression at various temperatures from 750 to 1050℃and strain rate from 0.01 to 10 s^(-1).The isothermal compression experiment results showed that the peak stress of Ti-6Al-4V-0.5Ni-0.5Nb titanium alloy decreased with the temperature increasing and the strain rate *** softening mechanism was dynamic recovery below T_(β)and changed to dynamic recrystallization above T_(β).The arrheniustype relationship was used to calculate the constitutive equation of Ti-6Al-4V-0.5Ni-0.5Nb alloy in two-phase *** was found that the apparent activation energies were 427.095 kJ·mol^(-1)in theα+βphase region and 205.451 kJ·mol^(-1)in theβphase region,*** the basis of dynamic materials model,the processing map is generated,which shows that the highest peak efficiency of power dissipation of 56%occurs at about 1050℃/0.01 s^(-1).It can be found in the processing maps that the strain had significant effect on the peak region of power dissipation efficiency of Ti-6Al-4V-0.5Ni-0.5Nb ***,optimized hot working regions were investigated and validated through microstructure *** optimum thermo mechanical process condition for hot working of Ti-6Al-4V-0.5Ni-0.5Nb titanium alloy was suggested to be in the temperature range of 950-1000℃with a strain rate of 0.01-0.1 s^(-1).

关键词： titanium alloy hot deformation processing map dynamic recrystallization

Photoinduced　Intramolecular　Electron　Transfer　in　an　Oblique　Zinc　Phthalocyanine－Viologen　Linked　System

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chinese Chemical Letters 1996年第10期7卷 931-934页

作者： Hong Jian TIAN Qing Fu ZHOU hui jun xu(institute of photographic chemistry. Academia Sinica. beijing 100101) ACAD SINICA INST PHOTOG CHEMBEIJING 100101PEOPLES R CHINA

The spectroscopic properties and photoinduced electron transfer process have been studied in zinc phthalocyanine-viologen system with bisphenol A (ZnPcAV2+). It was found that the excited singlet state of zinc phthalocyanine moiety is quenched and the fluorescence lifetime is reduced by the linked viologen. Nanosecond laser photolysis studies showed that intramolecular quenching of the excited triplet state of zinc phthalocyanine moiety by the attached viologen occurred giving reduced viologen radical ion (V+) that survived over 50 μs.

关键词： Electron Intramolecular

makeTwin:A reference architecture for digital twin software platform

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chinese Journal of Aeronautics 2024年第1期37卷 1-18页

作者： Fei TAO xuemin SUN Jiangfeng CHENG Yonghuai ZHU Weiran LIU Yong WANG hui xu Tianliang HU Xiaojun LIU Tingyu LIU Zheng SUN jun xu Jinsong BAO Feng XIANG Xiaohui JIN Digital Twin International Research Center International Research Institute for Multidisciplinary ScienceBeihang UniversityBeijing 100191China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China institute of Advanced Manufacturing and Intelligent Technology Beijing University of TechnologyBeijing 100124China RIAMB(beijing)Technology Development Co Ltd(R.T.D.)Beijing 100120China School of Mechanical Engineering Shandong UniversityJinan 250061China School of Mechanical Engineering Southeast UniversityNanjing 211189China School of Mechanical Engineering Xi’an Jiaotong UniversityXi’an 710049China College of Mechanical Engineering Donghua UniversityShanghai 201620China School of Machinery and Automation Wuhan University of Science and TechnologyWuhan 430081China beijing Aero-top Hi-tech Co LtdBeijing 100176China

Digital twin is currently undergoing a significant transformation from the conceptual and theoretical research phase to the implementation and application ***,a universally adaptable research and development platform for digital twin is critically needed to meet the development ***,a publicly accessible simulation,testing,and validation platform which can support digital twin model building,data processing,algorithm design,configuration,etc.,is urgently required for ***,for developers from the industry,a lowcode development platform that can offer a customizable suite of functions such as model creation,data management,protocol configuration,and visualization is urgently ***,for enterprise users,there is a lack of an application management platform that can be configured and migrated for various application scenarios,functions,and ***,based on the system research of digital twin theories and key technologies by the authors(such as the five-dimension digital twin model,digital twin modeling and digital twin data theory,digital twin standards,and so on),a digital twin software platform reference architecture,namely make Twin,is proposed and designed,as well as its ten core *** workflow of the make Twin and the interaction mechanisms among its core functions are ***,a digital twin application system for a chemical fiber textile shop floor(CFTS)which was developed according to make Twin,is introduced,which validates the proposed reference architecture.

关键词： Digital twin Digital twin software platform Industrial software makeTwin Reference architecture