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The Coronavirus Pandemic:The Growing Relevance of Moral Cosmopolitan Justice?

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Fudan Journal of the Humanities and Social Sciences 2022年第1期15卷 1-21页

作者： Sumiti Kataria hongmei qu School of Philosophy and Sociology Jilin University2699 Qianjin Streetayang District ChangchunJilin 135124China

The essay attempts to conceptualise the adverse repercussions of coronavirus in an unequal global *** changing security regime has intensified the increased probabilities of potential non-conventional threats The coronavirus has uncovered the unpleasant realities of the socio-economic and political structure of theglobal north encountering financial crises and lack of health care ***,the Pandemic has pushed the developing countries into the realm of extreme poverty,destroyed their minimum living conditions with the marginal provision of financial *** contemporary unequal scenario exposed the unequal treatment for different social and economic classes questioning the neo-liberal policy ***,the central theme of the essay is to understand the multidimensional underpinnings of the health crises and global inequality upholding the relevance of cosmopolitan justice,adopting an analytical and deductive methodology of driving conclusions from general premises.

关键词： Unequal global order Financial stagnation Fragile Health System Poverty Neo-liberal policy Cosmopolitan justice

The Pd-catalyzed synthesis of difluoroethyl and difluorovinyl compounds with a chlorodifluoroethyl iodonium salt(CDFI)

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Chinese Chemical Letters 2022年第3期33卷 1541-1544页

作者： Yaru Niu Chengyao Kimmy Cao Chenxin Ge hongmei qu Chao Chen Key Laboratory of Systems Bioengineering Ministry of EducationDepartment of Pharmaceutical EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology(Ministry of Education MOE)Department of ChemistryTsinghua UniversityBeijing 100084China State Key Laboratory of Elemento-Organic Chemistry Nankai UniversityTianjin 300071China

Herein, we report a simple and efficient method for the direct installation of chlorodifluoroethyl group onto aromatic molecules of various aromatic amides with a new 2-chloro,2,2-difluoroethyl(mesityl)iodonium salt(CDFI). Moreover, the chlorodifluoroethyl compounds could be smoothly converted into difluorovinyl compounds in a one-pot or discrete procedure and regarded as a steady source of difluorovinyl compounds with “HCl-mask”.

关键词： Iodonium salts C-H activation Pd-catalyzed Difluoroethylation Difluorovinylation

Multifunctional AIE Molecules Possessing Long-lasting Room Temperature Phosphorescence, Thermally Activated Delayed Fluorescence and Dual-mode Mechanochromism

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Chemical Research in Chinese Universities 2023年第6期39卷 960-967页

作者： ZHANG Xiaokun LI Xiaolong WANG Zonghao BAI Lulu qu hongmei XU Songlin Key Laboratory of Systems Bioengineering Ministry of EducationSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350P.R.China

Two simple donor-acceptor multifunctional pure organic light-emitting molecules[(9H-carbazol-9-yl)(4-hydroxyphenyl)-methanone(CzMP)and(4-hydroxyphenyl)(10H-phenothiazin-10-yl)methanone(PTZMP)]with distinct aggregation-induced emission(AIE)properties were ***,CzMP showed a long room temperature phosphorescence lifetime(>900 ms),and PTZMP exhibited triple emission of prompt fluorescence(PF),room temperature phosphorescence(RTP)and thermally activated delayed fluorescence(TADF).Furthermore,CzMP effectively responded to mechanical external forces and solvent fumigation,exhibiting dual-mode mechanochromic luminescence(MCL)including multiple fluorescence color shifts and phosphorescence ***-dependent density functional theory(TDDFT)calculations were investigated to explain different luminescence properties of the two molecules,and the single crystal of CzMP was obtained and analyzed to demonstrate the unique molecular stacking pattern and strong intermolecular interactions in close association with phosphorescence *** multifunctional luminescent properties of the emitters explored in this work could be more effectively applied to a wide range of applications,such as information encryption and anti-counterfeiting.

关键词： Aggregation-induced emission Room temperature phosphorescence Thermally activated delayed fluorescence Dual-mode mechanochromism

Zirconium-mediated Selective Synthesis of 1,4-Dialkyl（aryl）-hexa-substituted Benzenes from Two Silyl-substituted Alkynes and One Internal Alkyne

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Chemical Research in Chinese Universities 2016年第3期32卷 366-372页

作者： LI Junqiu ZHANG Jiqian qu hongmei LIU Jun LI Juan ZHOU Lishan Key Laboratory of Systems Bioengineering Ministry of Education Department of Pharmaceutical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300072 P. R. China Nantong Dongchang Chemical Industrial Co. Ltd. Nantong 226407 P. R. China CNOOC Tianjin Chemical Research and Design Institute Tianjin 300131 P. R. China

Based on the formation of 2,5-bis（trimethylsilyl）-zirconacyclopentadienes from two silylalkynes with CpEZrBu2 and the Cu-mediated formation of 1,4-disilylbenzene via the cycloaddition of zirconacyclopentadienes to disubstituted alkynes, a selective synthesis of 1,4-dialkyl（aryl）-hexa-substituted benzenes was achieved followed by iodination and coupling reaction. The coupling reactions were carried out with either organolithium reagent or orga- nozinc reagent（Negishi coupling）, depending on the electrophilic species.

关键词： Zirconium Hexa-substituted benzene Iodination Coupling reaction

Phase-Selective Gelators Based on p-Alkoxybenzoyl for Oil Spill Recovery and Dye Removal

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Transactions of Tianjin University 2019年第6期25卷 586-594页

作者： hongmei qu Jie Zhang Yunxia Ma Zhongxuan Li Jianjun Qiao Key Laboratory of Systems Bioengineering (Ministry of Education) Department of Pharmaceutical Engineering School of Chemical Engineering and Technology Tianjin University

Oil spills result in tremendous damage to the environment and *** this study,several p-alkoxybenzoyl-based gelators(1,2a,2b,2c,3)synthesized from commercially available materials were designed for recovering oil from an oil–water *** with remarkable gelation ability in various oils were characterized by nuclear magnetic resonance,Fourier transform infrared spectroscopy and X-ray diffraction to study the driving forces of ***,these gelators could achieve the goal of recycling oil from the oil–water mixture at room *** addition,gelator 2b could be used to remove toxic dyes from aqueous solutions with high ***,these compounds were considered promising materials for oil spill recovery and dye removal due to their practicality and high efficiency.

关键词： Organogelator p-Alkoxybenzoyl Phase selectivity Oil spills recovery Dye removal

Rapid and Efficient Adsorption Removal of Reactive Blue 4 from Aqueous Solution by Cross-Linked Microcrystalline Cellulose–Epichlorohydrin Polymers: Isothermal, Kinetic, and Thermodynamic Study

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Transactions of Tianjin University 2021年第1期27卷 77-86页

作者： Yuanyuan Zhai hongmei qu Zhongxuan Li Bo Zhang Jinxi Cheng Jiaji Zhang Key Laboratory of Systems Bioengineering Ministry of EducationSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China

In this study, we modified microcrystalline cellulose by cross-linking it with epichlorohydrin to obtain a rapid and efficient adsorbent for the removal of Reactive Blue 4 dye from aqueous solution. Evidences of the cross-linking of the microcrystalline cellulose were obtained by Fourier transform infrared spectroscopy, X-ray diff raction, Brunauer–Emmett–Teller analysis, thermogravimetric analysis, and scanning electron microscopy. We investigated the eff ects of adsorbent dosage, p H, initial dye concentration, temperature, and contact time on the dye adsorption capacity. The results showed that the adsorption equilibrium time was just 20 min and the maximum adsorption capacity was 69.79 mg/g. The adsorption isotherm data fitted the Langmuir isotherm model well, and the adsorption kinetics data followed the pseudo-second-order kinetic model. The results of the thermodynamic analysis suggest that the adsorption process was spontaneous and exothermic. Recyclability experiments demonstrated the good reusability of this adsorbent. Electrostatic interaction was found to dominate the adsorption process.

关键词： Microcrystalline cellulose Cross-linking Epichlorohydrin Adsorption Reactive Blue 4 Wastewater

Zirconium-Mediated Synthesis of Multi-substituted Dibenzosilole and Benzonaphthosilole Derivatives

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Transactions of Tianjin University 2018年第6期24卷 538-546页

作者： hongmei qu Xin Zhang Xu Chen Hui Zhang Yican Men Junqiu Li Key Laboratory of Systems Bioengineering (Ministry of Education) School of Chemical Engineering and TechnologyTianjin University Tianjin Kingsrial S&T Co. Ltd

In this study, a new zirconium-mediated cycloaddition for preparing dibenzosilole derivatives was developed using siliconbridged diynes and electron-withdrawing alkynes as starting materials. The preparation of silicon-bridged diynes from 1-bromide-2-iodobenzene, terminal alkynes, and dimethyldichlorosilane was also studied. Unlike in the previous synthesis methods, much higher yields of electron-withdrawing group-substituted dibenzosilole derivatives were obtained. In addition, a new synthesis strategy for preparing benzonaphthosilole derivatives using internal alkynes, 1,4-dibromobenzene, and electron-withdrawing alkynes as starting materials is proposed. Compared with previous methods, alkyl, phenyl, and electron-withdrawing groups can be successfully introduced onto aromatic rings, and the positions of these substituents can be easily controlled. The cycloaddition reactions for dibenzosilole and benzonaphthosilole derivatives are highly efficient one-pot processes, and the raw materials are available and easily prepared. Using these new methods, a series of novel multisubstituted dibenzonsilole and benzonaphthosilole derivatives were obtained effectively.

关键词： Zirconium-mediated reactions Dibenzosilole derivatives Benzonaphthosilole derivatives Multi-substitution

Synthesis and Characterization of Three Pentacene Derivatives

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Transactions of Tianjin University 2018年第5期24卷 453-460页

作者： hongmei qu Haijiao Shen Junqiu Li Yican Men Xu Chen Zepeng Chong Key Laboratory of Systems Bioengineering (Ministry of Education) Tianjin University Tianjin Kingsrial S&T Co. Ltd

The addition of substituents at the 6,13-position improved the solubility and stability of pentacene, making it possible to use the derivatives in spin coating of organic field-effect transistors(OFETs). Three pentacene derivatives, 6,13-bis(m-tolyl)pentacene(MP), 6,13-bis(4-butylphenyl)pentacene(BP), and 6,13-bis((4-butylphenyl)ethynyl)pentacene(BPEP) were synthesized, and their properties were investigated. 6,13-Pentacenequinone and organolithium were used in the preparation of 6,13-dihydropentacene at 0 ℃, and pentacene derivatives were synthesized with SnCl_2/HCl as reducing agent, to reduce 6,13-dihydropentacene at room temperature. The structure of the derivatives was characterized using NMR. The thermal stability, photochemical properties, and electronic structure of the three compounds were investigated using TGA, cyclic voltammetry, and UV–Vis. BPEP was also characterized using X-ray diffraction and atom force microscopy. BPEP was used to fabricate an OFET device using spin coating. The device showed a mobility of 0.07 cm^2 V s^(-1) at V_(th) =-10 V and I_(ON)/I _(OFF) = 10~2.

关键词： Organolithium Reduction reaction Mobility OFET Spin coating

Zirconium-mediated Selective Synthesis of quinoline Derivatives

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Chemical Research in Chinese Universities 2016年第4期32卷 621-624页

作者： MEN Yican ZHANG Jiqian ZHOU Lishan LI Junqiu LIU Jun LI Juan qu hongmei Key Laboratory of Systems Bioengineering Ministry of Education Tianjin Key Laboratory of Biological and Pharmaceutical Engineering Department of Pharmaceutical EngineeringSchool of Chemical Engineering and Technology Tianjin University Tianjin 300072 P. R. China Nantong Dongchang Chemical Industrial Co. Ltd Nantong 226407 P R. China China National Offshore Oil Corp. Tianjin Chemical Research and Design Institute Tianjin 300131 P R. China

A series of quinoline derivatives was obtained in high yields by an efficient one-pot reaction of substituted o-diiodobenzenes with azazirconacyelopentadienes, which were conveniently prepared from one internal alkyne and one nitrile mediated by zirconocene. This proposed synthetic method provides a feasible way to the synthesis of large N-heteroeyclic π-conjugated molecules.

关键词： Azazirconacyclopentadiene One-pot reaction quinoline derivative Zirconocene