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Synthesis,Characterization and Phase Transformation of 3D Open-framework Zinc Phosphate [Zn_6(H_2O)P_5O_(20)][C_5N_2H_(14)][C_6H_(16)N_2]_(0.5)·3H_2O

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chemical Research in Chinese Universities 2009年第4期25卷 407-411页

作者： SONG Yu DONG Zhao-jun WANG Yong-wei FU Jun li Ji-yang State Key Laboratory of Inorganic Synthesis and Preparative chemistry Jilin University Changchun 130012 P. R. China school of chemistry engineering ＆ Material Dalian Institute of Light Industry Dalian 116034 P. R. China Geriatric Ward First Hospital of Jilin University Changchun 130021 P R. China

With N,N′-dimethylpiperazine（DMPIP） as the structure-directing agent, a zinc phosphate [Zn6（H2O）P5O20] [C5N2H14] [C6H16N2]0.5·3H2O（1） with a novel three-dimensional（3D） open-framework architecture was hydrothermally synthesized. Its structure was determined by single-crystal X-ray diffraction analysis and further characterized by ICP, NMR, and TG analyses. Compound 1 crystallized in the triclinic space group P1（No.2） with a=0.9984（2） nm, b=1.2354（3） nm, c=1.2384（3） nm, α=88.32（3）°, β=74.57（3）°, γ=75.81（3）° and Z=2. The alternation arrrangement of tetrahedral Zn units[ZnO4 and ZnO3（H2O）] and PO4 units forms an anionic 3D open framework containing intersecting 16-, 10- and 8-ring channels. Water molecules, diprotonated DMPIP, and diprotonated N-methyl-piperazine（MPIP） decomposed from DMPIP, are located in the channels and interact with the host framework via H-bonds. Compound 1 transforms to another new phase（compound 2） upon calcination at 200―350℃ with the removal of the water coordinated to Zn atoms in the lattice. The phase transformation of compound 2 was further studied.

关键词： Hydrothermal Zinc phosphate Phase transformation

Synthesis,Crystal Structure and Anti-ischemic Activity of(E)-1-(4-(Bis(4-methoxyphenyl)methyl)piperazin-1-yl)-3-(4-acetoxy-3-methoxyphenyl)prop-2-en-1-one

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Chinese Journal of Structural chemistry 2015年第5期34卷 681-687页

作者： ZHONG Yan liU Ya-lin XU Zhao-Ying XU Yi li Ping WU Bin school of chemistry and chemical engineering Southeast University school of Pharmacy Nanjing Medical University school of Basic Medical Sciences Nanjing Medical University

A new cinnamide derivative,（E）-1-（4-（bis（4-methoxyphenyl）methyl）piperazin-1-yl）-3-（4-acetoxy-3-methoxyphenyl）prop-2-en-1-one（C31H34N2O6,Mr = 530.60）,has been synthesized by the condensation of 1-（bis（4-methoxyphenyl）methyl）piperazine and（E）-3-（4-acetoxy-3-methoxyphenyl）acrylic *** compound was characterized by 1H NMR,13 C NMR,H RMS and single-crystal X-ray *** crystal belongs to the orthorhombic system,space group P212121 with a = 24.946（5）,b = 7.6380（15）,c = 14.555（3） A,V = 2773.3（10） A^3,Z = 4,Dc = 1.271 g/cm^3,F（000） = 1128,μ = 0.088 mm-1,Mo Kα radiation（λ = 0.71073 A）,the final R = 0.0641 and w R = 0.1170.A total of 3009 unique reflections were collected,of which 1760 with I 〉 2σ（I） were *** C（17）–H（17B）···O（3） and C（22）–H（22A）···O（3） interactions as well as intermolecular C（27）–H（27A）···O（3） hydrogen bonds help to stabilize the crystal *** title compound was evaluated for the anti-ischemic activity in vitro and in *** bioassay results indicated that the title compound displayed efficient activities against glutamine-induced neurotoxicity in PC12 cells and significantly prolonged the survival time of mice subjected to acute cerebral ischemia.

关键词： cinnamide crystal structure synthesis anti-ischemic activity

Recent Advances in the Understanding of the Surface Reconstruction of Oxygen Evolution Electrocatalysts and Materials Development

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Electrochemical Energy Reviews 2021年第3期4卷 566-600页

作者： Junwei Chen Haixin Chen Tongwen Yu Ruchun li Yi Wang Zongping Shao Shuqin Song The Key Lab of Low‑Carbon chemistry&Energy Conservation of Guangdong Province PCFM LabSchool of Chemical Engineering and TechnologySchool of Materials Science and EngineeringSun Yat-sen UniversityGuangzhou 510275GuangdongChina Jiangsu National Synergetic Innovation Center for Advanced Materials State Key Laboratory of Materials‑Oriented Chemical EngineeringCollege of Chemical EngineeringNanjing Tech UniversityNanjing 210009JiangsuChina WA school of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityPerthWA 6102Australia

The electrochemical oxygen evolution reaction(OER)plays an important role in many clean electrochemical energy storage and conversion systems,such as electrochemical water splitting,rechargeable metal–air batteries,and electrochemical CO_(2) ***,the OER involves a complex four-electron process and suffers from intrinsically sluggish kinetics,which greatly impairs the efficiency of electrochemical *** addition,state-of-the-art RuO2-based OER electrocatalysts are too expensive and scarce for practical *** development of highly active,cost-effective,and durable electrocatalysts that can improve OER performance(activity and durability)is of significant importance in realizing the widespread application of these advanced *** date,considerable progress has been made in the development of alternative,noble metal-free OER *** these alternative catalysts,transition metal compounds have received particular attention and have shown activities comparable to or even higher than those of their precious metal *** contrast to many other electrocatalysts,such as carbon-based materials,transition metal compounds often exhibit a surface reconstruction phenomenon that is accompanied by the transformation of valence states during electrochemical OER *** surface reconstruction results in changes to the true active sites and an improvement or reduction in OER catalytic ***,understanding the self-reconstruction process and precisely identifying the true active sites on electrocatalyst surfaces will help us to finely tune the properties and activities of OER *** review provides a comprehensive summary of recent progress made in understanding the surface reconstruction phenomena of various transition metal-based OER electrocatalysts,focusing on uncovering the correlations among structure,surface reconstruction and intrinsic *** advances in OER electrocatalysts that

关键词： Oxygen evolution reaction(OER) Surface reconstruction Electrocatalyst Metal oxides In situ/Operando characterization

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高纯五氧化二钒制备过程钒铬分离的研究进展

江西冶金 2024年第3期44卷 147-156页

作者：李煊魏艳芳吴一玺向小艳重庆科技学院化学化工学院重庆401331 重庆科技学院冶金与材料工程学院重庆401331

全钒液流电池因资源禀赋好、自给率高,有望成为我国大规模储能市场的主力军。全钒液流电池以高纯五氧化二钒为原料,对铬等杂质含量要求严格。目前,我国五氧化二钒主要从含钒钢渣中提取,但钒铬难以深度分离,导致产品中铬含量较高。因此,... 详细信息

全钒液流电池因资源禀赋好、自给率高,有望成为我国大规模储能市场的主力军。全钒液流电池以高纯五氧化二钒为原料,对铬等杂质含量要求严格。目前,我国五氧化二钒主要从含钒钢渣中提取,但钒铬难以深度分离,导致产品中铬含量较高。因此,从含钒钢渣中提取并制备电池级五氧化二钒,以及钒铬深度分离问题亟待解决。本文综述了高纯五氧化二钒制备过程钒铬分离的研究进展,对化学沉淀法、溶剂萃取法、离子交换法、吸附法及结晶法分离钒铬进行比较,并通过绘制298 K下V-Cr-H_(2)O系电位(E)-pH图,获得钒铬选择性分离的热力学窗口。与其他方法相比,化学沉淀法具有成本低、操作简单等优势,可根据钒铬氧化还原的电位差异,通过选择性氧化或还原沉淀,实现钒铬的深度分离。

关键词：高纯五氧化二钒铬分离含钒钢渣

Facile microwave-assisted ionic liquid synthesis of sphere-like BiOBr hollow and porous nanostructures with enhanced photocatalytic performance

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Green Energy & Environment 2017年第2期2卷 124-133页

作者： Zhigang Chen Jie Zeng Jun Di Dexiang Zhao Mengxia Ji Jiexiang Xia Huaming li school of Environment and Safety engineering Ministry of EducationJiangsu University Key Laboratory of Modern Agriculture Equipment and Technology Ministry of Education Jiangsu University school of chemistry and chemical engineering Ministry of EducationJiangsu University

In this work, two kinds of self-assembled hierarchical BiOBr microcrystals were rapidly synthesized through a simple microwave-assisted route in the presence of reactable ionic liquid 1-hexadecyl-3-methylimidazolium bromide([C_(16)mim]Br). These porous and hollow BiOBr microspheres were obtained via a facile solvothermal method with or without polyvinyl pyrrolidone(PVP), respectively. During the synthetic process, ionic liquid [C_(16)mim]Br played as solvent, reactant and template at the same time. Moreover, the BiOBr hollow and porous microspheres exhibited outstanding photocatalytic activities for the degradation of rhodamine B(RhB) under visible light irradiation. A possible photocatalytic mechanism was also discussed in detail. It can be assumed that the higher photocatalytic activities of BiOBr porous microspheres materials could be ascribed to the novel structure, larger specific surface area, narrower band gap structure and smaller particle size.

关键词： BiOBr Photocatalytic Ionic liquid Microwave

KOH Direct Activation for Preparing Activated Carbon Fiber from Polyacrylonitrile-based Pre-oxidized Fiber

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chemical Research in Chinese Universities 2014年第3期30卷 441-446页

作者： GAO lili LU Haiyan liN Haibo SUN Xiuyun XU Jianling liU Dechen li Yang College of chemistry Jilin University Changchun 130012 P. R. China College of chemistry and Pharmaceutical engineering Jilin Institute of Chemical Technology Jilin 132022 P. R. China school of Environment Northeast Normal University Changchun 130117 P. R. China

The activated carbon fiber（ACF） was prepared from polyacrylonitrile-based pre-oxidized fiber（PANOF） by KOH direct activation. The influence of activation conditions including impregnation ratio（the mass ratio of PANOF to KOH）, activation temperature and activation time on the pore structure and electrochemical properties of ACF was investigated, and the corresponding activation mechanism was proposed. The ACF prepared at an activation temperature of 800℃ and an impregnation ratio（the mass ratio of PANOF to KOH） of 1：2 for an activation time of 1 b in 6 mol/L KOH solution exhibits a specific surface area of 3029 m^2/g, a mesoporosity of 84.2% and a specific capacitance of 288 F/g, and shows a good capacitive performance. The prepared ACF can be used as the electrode material for supercapacitors.

关键词： Direct activation KOH Activated carbon fiber Supercapacitor Polyacrylonitrile-based pre-oxidized fiber

Catalytic Hydrogenation of Acetic Acid to Acetaldehyde: Synergistic Effect of Bifunctional Co/Ce-Fe Oxide Solid Solution Catalysts

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Chinese Journal of chemistry 2019年第7期37卷 709-719页

作者： Naixu li Qi Zhang Rehana Bibi Quanhao Shen Richard Ngulube Yunyi liu Jiancheng Zhou school of chemistry and chemical engineering Southeast University Nanjing Jiangsu 211189 China Jiangsu Key Laboratory for Biomass Energy and Material Nanjing Jiangsu 210042 China Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research Southeast University Nanjing Jiangsu 211189 China

The large-scale industrial production of acetic acid (HAc) from carbonylation of methanol has enabled intense research interest from direct hydrogenation of HAc to acetaldehyde (AA).Herein,a series of cerium-iron oxide solid solution supported metallic cobalt catalysts were prepared by modified sol-gel method and were applied in gas-phase hydrogenation of HAc to AA.A synergistic effect between the hydrogenation metal cobalt and Ce-Fe oxide solid solution is ***,oxygen vacancies provide the active sites for adsorption of HAc,while highly uniformly dispersed metallic Co adsorbs H2 and activates the reduction of HAc into ***,the metallic Co can also assist the cyclical conversion between Fe3+/Fe2+ and Ce3+/Ce4+ on the surface of ***2-δ *** unique effect substantially enhances the ability of the support material to rapidly capture oxygen atoms from *** is found that the catalyst of 5% Co/Ce0.8Fe0.2O2-δ with the highest concentration of oxygen vacancy presents the best catalytic performance (*** yield reaches 49.9%) under the optimal reaction conditions (i.e.623 K and H2 flow rate =10 mL/min).This work indicates that the Co/Ce-Fe oxide solid solution catalyst can be potentially used for the selective hydrogenation from HAc to *** synergy between the metallic Co and Ce1-xFexO2-δ revealed can be extended to the design of other composite catalysts.

关键词： Acetic Acid Acetaldehyde Oxide Solid Solution Catalysts

A Facile Synthetic Approach to 3-Halo-4-substituted-l,5-dihydro-4H-1,2,4-triazoline-5-thiones Based on Retro-Michael Addition

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chemical Research in Chinese Universities 2017年第4期33卷 587-593页

作者： TIAN He liU Yuqiang li Xingwei XIE Yafei liU Changying WANG Jianwu ZHAO Guilong school of chemistry and chemical engineering Shandong University Jinan 250100 P. R. China Eanjin Key Laboratory of Molecular Design and Drug Discovery Eanjin Institute of Pharmaceutical Research Tianjin 300193 P. R. China

A facile 3-step synthetic approach to 3-halo-4-substituted-l,5-dihydro-4H-1,2,4-triazolme-5-thiones （la--lk） from corresponding unhalogenated 8a---8i was developed based on the strategy of retro-Michael addition, with the key steps being regioselective S-alkylation of compounds 8a-8i with ethyl 3-iodopropionate（12c） and alkaline cleavage of the propionate protecting group via retro-Michael addition. The synthetic approach was characterized by simplicity of operation and wide substrate scope.

关键词： Synthetic approach Protecting group Triazole Halogenation Regioselectivity Retro-Michael addition

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“熵”不起——生命以负熵为生

大学化学 2024年第9期39卷 151-156页

作者：杨清翠刘文曹莉唐琛许冰赵捷西安建筑科技大学化学与化工学院西安710055 西安建筑科技大学文学院西安710055

以某大学社团几名学生观影“长安三万里”后对李白诗句的感慨为切入点,引出对熵及熵增原理的讨论。通过介绍熵的起源及意义了解热力学三大定律的内容及关联;再分别从熵增原理对生命和生活两个方面的启示进行阐述。揭示了整个人类的进化... 详细信息

以某大学社团几名学生观影“长安三万里”后对李白诗句的感慨为切入点,引出对熵及熵增原理的讨论。通过介绍熵的起源及意义了解热力学三大定律的内容及关联;再分别从熵增原理对生命和生活两个方面的启示进行阐述。揭示了整个人类的进化和生命的发展就是一部逆熵的历史,人活着就是对抗熵增的过程,若要不负此生,就要奋斗不止。

关键词：熵熵增定律负熵启示

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