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Chinese Journal of Structural chemistry 2008年第10期27卷 1163-1166页

作者：钱群张敏李志芬曹卫国张军邵敏夏义本 Department of chemistry Shanghai University instrumental Analysis and Research center Shanghai University School of Materials Science and Engineering Shanghai University

The reaction of hydrazine hydrate with a new α,γ-diketone ester 3, derived from the reaction of 2,6-dimethyl-3,5-diacetyl-pyridine 2 with diethyl oxalate in the presence of sodium ethoxide, afforded the pyrazole derivative 4. Treatment of 4 with 2-chlorobenzoyl chloride gave diethyl 2,6-dimethyl-3,5-diyl-（1-2（chlorobenzoyl）-1H-pyrazole-3-diethyl-carboxylate） pyridine 5. Fine crystal of 5 suitable for XRD analysis was obtained form recrystalization in ethyl acetate. The crystal belongs to the triclinic system, space group P1^-, with a = 1.0342（11）, b = 1.2211（12）, c = 1.5013（15） nm, α = 82.5190（10）,β = 85.7960（10）,γ = 85.3150（10）°, V= 1.8697（3） nm^3, Dc= 1.173 g/cm^3, μ = 0.219 mm^-1, F（000） = 684, Z = 2, the final R = 0.0720 and wR = 0.2211.

关键词： pyridine pyrazole N-acylation crystal structure

Synthesis of morphology-controlled silver nanostructures by electrodeposition

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Nano-Micro Letters 2010年第1期2卷 6-10页

作者： C.L.Liang K.Zhong M.Liu L.Jiang S.K.Liu D.D.Xing H.Y.Li Y.Na W.X.Zhao Y.X.Tong P.Liu instrumental Analysis & Research center Sun Yat-sen University School of chemistry and Chemical Engineering Sun Yat-sen University

Nanostructured silver was obtained by potentiostatic *** effects of ionized surfactant(sodium dodecanesulphonate)and the substrate(Cu and Ti)on the morphology of depositions were *** is found that morphologies of silver nanostructures can be simply controlled via change of the *** Ag nanoparticles with narrow size distribution were obtained by electrodeposition in Ag NO3-SDS aqueous solution on copper *** the case of titanium substrate,silver dendrite structures were *** of different morphologies,XRD and TEM results showed that the as-prepared samples belong to face-centered cubic silver structure with good *** formation mechanism of different silver nanostructures was discussed.

关键词： Electrodeposition Silver nanopartilces Silver nano dentrites

Multistep evolution from a metal–organic framework to ultrathin nanosheets

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Science Bulletin 2019年第14期64卷 964-967页

作者： Yun Li Jin Huang Zong-Wen Mo Xue-Wen Zhang Xiao-Ning Cheng Li Gong Dong-Dong Zhou Jie-Peng Zhang MOE Key Laboratory of Bioinorganic and Synthetic chemistry School of Chemistry Sun Yat-Sen University Guangzhou 510275 China instrumental Analysis and Research center Sun Yat-Sen University Guangzhou 510275 China

Two-dimensional (2D) materials and ultrathin nanosheets have attracted tremendous research interests [1-4]. Exfoliation of porous coordination polymers (PCPs) or metal-organic frameworks (MOFs) with 2D coordination structures is emerging as a viable strategy for preparation of new types of 2D materials [5-8]. The relatively weak bonding within and strong interactions between 2D coordination networks are the main problems for successful exfoliation [9]. Pretreatments of the layered MOFs to expand the interlayer distances can be helpful [10-12]. Capturing the exfoliation intermediates and visualizing their structures are valuable for understanding the exfoliation mechanism and confirming the structures of the final 2D materials [11,12].

关键词： Two-dimensional (2D) porous coordination polymers (PCPs) metal-organic frameworks (MOFs)

Aggregation-induced Emission of Non-conjugated Poly(amido amine)s:Discovering,Luminescent Mechanism Understanding and Bioapplication

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Chinese Journal of Polymer Science 2015年第5期33卷 680-687页

作者： Rui-bin Wang Wang-zhang Yuan 朱新远 School of chemistry and Chemical Engineering Shanghai Key Lab of Electrical Insulation and Thermal AgingShanghai Jiao Tong University instrumental Analysis center Shanghai Jiao Tong University

It is found that the fluorescence of aliphatic poly（amido amine）s including linear and hyperbranched ones can be dramatically enhanced by simple aggregation of polymer chains, attributing to the formation of a variety of intra- and interchain clusters with shared lone-pair electrons and the restriction of intramolecular motions. Thanks to the combination of strong solid fluorescence and excellent biocompatibility, these non-conjugated polymers become promising candidates for bioimaging such as bacterial detection. This finding not only extends the aggregation-induced emission（AIE） systems from conjugated compounds to non-conjugated materials, which expands the bioapplication range of AIE systems, but also sheds light on the exploration of novel unconventional luminogens.

关键词： Luminescence Aggregation-induced emission Non-conjugated polymer

Magnetic force microscope study on anisotropic NdFeB permanent magnets

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中国有色金属学会会刊：英文版 2003年第6期13卷 1410-1414页

作者：刘薇蒋建华吴建生李刚 Key Laboratory of State Education Ministry for High Temperature Materials and Testing instrumental Analysis center

NdFeB permanent magnets prepared by powder metallurgy were investigated using magnetic force microscopy (MFM). The excellent MFM images of sample along the surfaces parallel and perpendicular to the alignment axis were collected respectively. The results show the necessity of annealing procedure in the preparation of the samples to remove the polishing surface stress and to illustrate the real magnetic domain structure, so that the much information about both the magnetic structure and the topographic microstructure is obtained. The hard MFM tip is verified to be effective for this material especially for the sample with the examined surface parallel to alignment axis. By analyzing these well-captured magnetic force images, magnetic domains and alignment degree as well as the topographic information such as grain size and the nonmagnetic phases at the grain boundaries were demonstrated.

关键词： NdFeB 永磁体永磁材料磁力显微镜各向异性

Chiral Recognition and Photoreaction of β-Amino Acids with Iridium(III)Complexes

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Chinese Journal of chemistry 2022年第24期40卷 2909-2918页

作者： Ming-Feng Xiong Hai-Yun Zhou Xiao-Kang Huang Jing-Yan Fan Bao-Hui Ye MOE Key Laboratory of Bioinorganic and Synthetic chemistry School of ChemistrySun Yat-sen UniversityGuangzhouGuangdong510275 China instrumental Analysis and Research center Sun Yat-sen UniversityGuangzhouGuangdong510275 China

β-Amino acids(AAs),homologs ofα-AAs,are important building blocks of biological ***,chiral recognitions ofβ-AAs with Ir(III)complexes are reported,in favor of formation of the thermodynamically stableΛ-[Ir(pq)_(2)(D-β-AAs)]andΔ-[Ir(pq)_(2)(L-β-AAs)](pq is 2-phenylquinoline)*** photoreactions of[Ir(pq)_(2)(β-AA)]complexes are observed in an EtOH solution in the presence of O_(2) at room *** primaryβ-AAs complexes,such as rac-[Ir(pq)_(2)(β-ala)](β-ala isβ-alanine),Δ-[Ir(pq)_(2)(D-β-ma)]andΛ-[Ir(pq)_(2)(D-β-ma)](β-ma isβ-methylalanine),Δ-[Ir(pq)_(2)(D-β-pa)]andΛ-[Ir(pq)_(2)(D-β-pa)](β-pa isβ-phenylalanine),and rac-[Ir(pq)_(2)(β-dma)](β-dma is 3,3-dimethyl-β-alanine),are interligand C—N cross-coupling in situ between pq andβ-AAs *** secondaryβ-AA complexesΔ-[Ir(pq)_(2)(L-β-pro)]andΛ-[Ir(pq)_(2)(L-β-pro)](β-pro isβ-proline,2-(pyrrolidin-2-yl)acetic acid)are dehydrogenatively oxidized into imino acid complexesΔ-[Ir(pq)_(2)(L-β-pro-2H^(β)’)]andΛ-[Ir(pq)_(2)(L-β-pro-2H^(β)’)](L-β-pro-2H^(β)’=2-(3,4-dihydro-2H-pyrrol-2-yl)acetic acid),***,the dehydrogenative reaction inΔ-[Ir(pq)_(2)(L-β-pro)]diastereomer is regioselective depending on the reaction temperature,affordingΔ-[Ir(pq)_(2)(L-β-pro-2H^(β)’)]andΔ-[Ir(pq)_(2)(L-β-pro-2H^(β))](β-pro-2H^(β)=2-(3,4-dihydro-2H-pyrrol-5-yl)acetic acid)at low *** chiral recognitions and photoreactions of Ir(III)-β-AAs complexes are much different from the previous observations in Ir(III)-α-AAs complexes.

关键词： Photooxidation Chiral recognition Regioselectivity Enantioselectivity β-Amino acid

Simple Approach to the Highly Stereoselective Synthesis of trans-1,2-Cyclopropane Derivatives

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Chinese Journal of chemistry 2007年第8期25卷 1187-1191页

作者：张慧曹卫国任仲蛟陈杰孙汝淑胡吉嵘钱嘉贤邓红梅 Department of chemistry Shanghai University Shanghai 200444 China State Key Laboratory of Organometallic chemistry Chinese Academy of Sciences Shanghai 200032 China instrumental Analysis and Research center Shanghai University Shanghai 200444 China

In the presence of KF·2H2O, furoylmethyltriphenylarsonium bromide （1a） or thienoylmethyltriphenylarsonium bromide （1b） reacted with 2-[（un）substituted benzylidene]malononitrile （2） in chloroform at room temperature to give trans-3,3-dicyano-1-furoyl-2-[（un）substituted phenyl]cyclopropane （3a） or trans-3,3-dicyano-1-thienoyl-2- [（un）substituted phenyl]cyclopropane （3b） respectively in good yield with high stereoselectivity. The structures of product 3 were confirmed by IR, MS, 1^H NMR, 1^H-1^H COSY and microanalysis. The relative configuration of product 3 was determined by 1^H-1^H NOESY technique. The mechanism for the formation of product 3 was also proposed.

关键词： stereoselective synthesis arsonium ylide cyclopropane derivative

Convenient Synthesis of 3,5-Biscarbamoyl-pyridine Derivatives

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Chinese Journal of chemistry 2011年第10期29卷 2119-2123页

作者：汪霞云朱逸雯张敏陆东亮钱群陈雅丽曹卫国宋力平邓红梅 Department of chemistry College of Science Shanghai University Shanghai 200444 China Key Laboratory of Organofluorine chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China instrumental Analysis and Research center Shanghai University Shanghai 200444 China

An efficient and convenient method for synthesis of 3,5-bis-carbamoyl-2,6-dimethylpyridine derivatives was achieved in good to excellent yields by reaction of anilines with 3,5-bis（3＇,5＇-dimethy1-1＇-pyrazolyl-carbony1）-2,6- dimethylpyridine, in which pyrazoles served as leaving groups. The structures of products were confirmed by spectra data and microanalysis.

关键词： heterocycles amide aromatic amine synthesis

Mechanism study on UV-induced photodegradation of nonylphenol ethoxylates by intermediate products analysis

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Chinese Chemical Letters 2007年第4期18卷 473-475页

作者： Ling Chen Hai Yun Zhou Lan Liu Qin Ying Deng School of chemistry and Chemical Engineering Sun Yat-Sen University Guangzhou 510275 China instrumental Analysis and Research center Sun Yat-Sen University Guangzhou 510275 China

Photodegradation of nonylphenol ethoxylates （NPloEO） was investigated in laboratory scale under UV irradiation. The intermediate photodegradation products were analyzed by LC-ESI-MS. Three kinds of intermediate products including aldehydic compounds, carboxylic compounds and cyclohexanyl compounds were identified. Five main degradation routes involving the oxidation of the alkyl chain and ethoxylate unit, shortening of the alkyl chain and ethoxylate unit, hydrogenation of the benzene ring were proposed.

关键词： Photodegradation Nonylphenol ethoxylates Intermediate products Mechanism study

Elucidating the electronic metal-support interaction enhanced hydrogen evolution activity on Ti_(3)C_(2)T_(x)MXene basal plane by scanning electrochemical microscopy

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Nano Research 2023年第7期16卷 8902-8909页

作者： Sisi Jiang Tong Sun Chaoqun Gu Yingfei Ma Zhenyu Wang Dengchao Wang Zonghua Wang College of chemistry and Chemical Engineering Shandong Sino-Japanese Center for Collaborative Research of Carbon NanomaterialsInstrumental Analysis Center of Qingdao UniversityQingdao UniversityQingdao 266071China School of Chemical Sciences University of Chinese Academy of ScienceBeijing 100190China

MXene,a family of two-dimensional(2D)transition metal carbides and nitrides,has intriguing electrochemical energy storage and electrocatalysis *** the electronic metal-support interaction(EMSI)effect is one effective strategy to optimize the catalytic efficiency for MXene-based ***,most of the studies concentrate on optimizing the performance of metals rather than supported substrates by using this *** this work,we mainly investigate the influence of an EMSI effect on the performance of the supported substrate(Ti_(3)C_(2)T_(x)MXene).Detailed scanning electrochemical microscopy and numerical simulations results reveal that the charge distribution on the Ti_(3)C_(2)T_(x)basal plane(approximate 100 nm-radius)surrounding Au nanoparticles(20 nm-radius)was significantly enhanced as a result of-O being the majority surface functional group on Ti_(3)C_(2)T_(x)that was attached to Au nanoparticle,and the related hydrogen evolution reaction(HER)activity was much better than that of the unaffected Ti_(3)C_(2)T_(x)basal plane,which even can be comparable to that of *** finding will be helpful for designing new strategies to enhance the overall catalytic performance of various MXene-based composites.

关键词： electrocatalysis nanoelectrochemistry MXenes scanning electrochemical microscopy electronic metal-support interaction