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Science china chemistry 2008年第2期51卷 120-127页

作者： WEI RuiPing1,2, GU YanBo1 & WANG Jun1 1 State Key Laboratory of Materials-Oriented chemical engineering, College of chemistry and chemical engineering, nanjing Uni- versity of Technology, nanjing 210009, china 2 College of chemistry and chemical engineering, Southeast university, nanjing 211189, china State Key Laboratory of Materials-Oriented chemical engineering College of Chemistry and Chemical EngineeringNanjing University of TechnologyNanjing 210009China College of chemistry and chemical engineering Southeast UniversityNanjing 211189China

The bimetal-bearing (CePt or LaPt) 12-tungstophosphoric acid (H3PW12O40 (PW)) catalysts supported on dealuminated USY zeolite (DUSY) were prepared by impregnation and characterized by XRD, BET, IR, and H2-chemisorption. Their catalytic activities were tested in the hydroisomerization of n-heptane with a continuous atmospheric fixed-bed reactor. After the steam treatment combined with the acid leaching, as well as the supporting with PW and the bimetals, the DUSY support retains the Y zeolite porosity and the PW well keeps its Keggin structure in catalysts. The doping of Ce into the catalysts enhances the dispersion of Pt on the catalyst surface. The Pt-bearing PW catalysts doped with Ce or La, especially Ce, exhibit much higher catalytic activity and selectivity than the catalysts without dopants at lowered reaction temperatures. At the optimal reaction conditions, i.e., the reaction temperature of 250℃ and WHSV of 1.4 h1, the catalyst with a Pt loading of 0.4%, PW loading of 10% and a molar ratio of Ce to Pt of 15:1 shows a conversion of n-heptane of 70.3% with a high selectivity for isomerization products of 94.1%.

关键词： hydroisomerization of n-heptane bimetal catalyst heteropoly acid USY platinum

Optical applications of quantum dots in biological system

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Science china chemistry 2011年第8期54卷 1177-1184页

作者： WANG Wei & ZHU Jun-Jie State Key Laboratory of Analytical chemistry for Life Science school of chemistry and chemical engineering, nanjing university, nanjing 2.0093, china 1. State Key Laboratory of Analytical chemistry for Life Science school of chemistry and chemical engineering Nanjing University Nanjing 210093 China

This review presents a simple introduction on the unique properties and general synthesis of quantum dots (QDs) in which we lay emphasis on the optical applications in the biological system. The detection of biological molecules such as DNA, protein and enzyme, the cell-based analysis and in vivo animal imaging are mainly discussed.

关键词： quantum dots optical application biological system

Polymer-assisted nanoparticulate contrast-enhancing materials

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Science china chemistry 2010年第3期53卷 479-486页

作者： DING Yin1,3,HU Yong2,WU Wei1 & JIANG XiQun1 1Laboratory of Mesoscopic chemistry and Department of Polymer Science and engineering,College of chemistry & chemical engineering,nanjing university,nanjing 2.0093,china 2National Laboratory of Solid State Microstructure,Department of Material Science and engineering,nanjing university,nanjing 2.0093,china 3Key Laboratory of Analytical chemistry for Life Science,Ministry of Education,school of chemistry and chemical engineering,nanjing university,nanjing 2.0093,china 1. Laboratory of Mesoscopic chemistry and Department of Polymer Science and engineering College of Chemistry & Chemical Engineering Nanjing University Nanjing 210093 China3. Key Laboratory of Analytical Chemistry for Life Science Ministry of Education School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China2. National Laboratory of Solid State Microstructure Department of Material Science and Engineering Nanjing University Nanjing 210093 China

The application of nanotechnology in medicine research has significant potential in modern biomedical research,disease diagnosis and *** fluorophore-based detection techniques have been widely used as imaging and signal transduction tools for the detection of trace levels of *** photosensitivity of the fluorophores,however,limits their application in such complex environments as living bio-systems where degradation or photobleaching *** nanoparticles have unique and stable optical,electrical,magnetic and catalytic properties because of their various shapes,sizes and *** potential of the nanoparticles as novel imaging agents has been studied as a possible solution to this *** modification of inorganic nanoparticles could enhance their biostability in physiological conditions and ability of targeting bioactive molecules.

关键词： contrast agent cell image gold nanoparticles iron oxide nanoparticles carbon nanotubes polymeric-inorganic hybrid nanoparticles

Regioselective aminohalogenation of β-nitrostyrenes using NCS and NBS as nitrogen/halogen sources

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Science china chemistry 2010年第1期53卷 140-146页

作者： ZHI SanJun1,2,SUN Hao2,LIN Chen2,ZHANG GuangQian2,LI GuiGen4 & PAN Yi2,3 1 Department of chemistry,Huaiyin Normal university,Huai’an 221003,china 2.school of chemistry and chemical engineering,nanjing university,nanjing 2.0093,china 3 State Key Lab of Coordination chemistry,nanjing university,nanjing 2.0093,china 4 Department of chemistry and Biochemistry,Texas Tech university,Lubbock,Texas 79409-1061,USA 1. Department of chemistry Huaiyin Normal University Huai’an 221003 China2. School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China4. Department of Chemistry and Biochemistry Texas Tech University Lubbock Texas 79409-1061 USA3. State Key Lab of Coordination Chemistry Nanjing University Nanjing 210093 China

Aminohalogenation reaction of β-nitrostyrenes with N-halosuccinimides(N-chloro and N-bromosuccinimides) has been successfully conducted by using nickel acetate as a catalyst in the presence of potassium carbonate and succinimide as *** reaction was easily performed at room temperature under nitrogen gas protection to give dihalorinaed haloamino products in good to excellent yields(60%-98%).The structure has been confirmed by X-ray crystal structure analysis.

关键词： aminohalogenation vicinal haloamines β-nitrostyrenes NBS NCS

Surface Modification of Silk Fibroin Films with Zwitterionic Phosphobetaine to Improve the Hemocompatibility

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Journal of Wuhan university of Technology(Materials Science) 2010年第6期25卷 969-974页

作者：蒋雪峰陈强 school of chemistry and chemical engineering Nanjing University

Zwitterionic phosphobetaine bearing a hydroxyl and a zwitterionic group,8-hydroxy-2-octyl phosphorylcholine（HOPC）,was synthesized and constructed to the surface of silk fibroin（SF） films in order to improve the hemocompatibility of fibroin films by a an isocyanate head *** surface characteristics of the modified films were measured by attenuated total reflection Fourier transform infrared spectroscopy（ATR-FTIR） and electron spectroscopy for chemical analysis（ESCA）,displaying the successful immobilization of Zwitterionic phosphobetaine on the surface of these fibroin ***,the further platelet adhesion test in platelets rich plasma（PRP） of human beings showed the zwitterionic phosphobetaine led mainly to good *** experimental results indicated a reasonable approach to improve the blood compatibility of fibroin films.

关键词： zwitterionic phosphobetaine silk fibroin blood compatibility platelet adhesion

One-dimensional metal phosphonates based on 6-phosphononicotinic acid:A structural and magnetic study

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Science china chemistry 2010年第10期53卷 2112-2117页

作者： WANG PengFei, DUAN Yan & ZHENG LiMin State Key Laboratory of Coordination chemistry Coordination chemistry Institute, school of chemistry and chemical engineering, nanjing university, nanjing 2.0093, china 1. State Key Laboratory of Coordination chemistry Coordination chemistry Institute School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China

The reactions of 6-phosphononicotinic acid (pnaH3) and metal salts result in three new compounds, namely, M(pnaH)-(H2O)3·H2O [M = Co(Ⅱ) (1), Ni(Ⅱ) (2), Zn(Ⅱ) (3)]. These compounds are isostructural and contain 21 helical chains made up of corner-sharing {MO5N} octahedra and {PO3C} tetrahedra. The chains are further connected by extensive hydrogen bonds to form a three-dimensional supramolecular structure. Magnetic studies reveal that dominant antiferromagnetic interactions are mediated in both 1 and 2. Interestingly the dehydrated compound 1 shows metamagnetic behavior at low temperature.

关键词： carboxylate-phosphonate coordination polymer magnetic property metamagnetism

Syntheses,crystal structures and properties of three novel coordination polymers with tripodal imidazole-containing ligands and benzenetetracarboxylate

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Science china chemistry 2010年第10期53卷 2164-2169页

作者： SU Zhi, FAN Jian & SUN WeiYin State Key Laboratory of Coordination chemistry nanjing National Laboratory of Microstructures Coordination chemistry Institute, school of chemistry and chemical engineering, nanjing university, nanjing 2.0093, china 1. State Key Laboratory of Coordination chemistry nanjing National Laboratory of Microstructures Coordination chemistry Institute School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China

Three novel coordination polymers, [Ni2(tib)2(btec)]·2H2O (1), [Co2(tib)2(btec)]·2H2O (2) and [Zn4(tib)2(btec)Cl4]·2H2O (3), have been synthesized by using mixed ligands of 1,3,5-tris(1-imidazolyl)benzene (tib) and 1,2,4,5-benzenetetracarboxylic acid (H4btec) under hydrothermal conditions. Complexes 1 and 2 have the same structure and are rare three-dimensional (3D) self-penetrating (3,4,5)-connected nets, while complex 3 is an unprecedented (3,4)-connected 3D net. The different structures of 1 (2) and 3 are ascribed to the distinct coordination geometry of the metal centers. The thermal stability and photoluminescence property of the complexes were investigated.

关键词： coordination polymer self-penetration crystal structure thermal stability photoluminescence property

A study on methane coupling to acetylene under the microwave plasma

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Science china chemistry 2010年第1期53卷 231-237页

作者： SHEN ChangSheng1,SUN YongZhi1,SUN DeKun2 & YANG HongSheng1 1State Key Laboratory of Millimeter Waves school of Electronic Science and engineering,Southeast university,nanjing 210096,china 2school of chemistry and chemical engineering,nanjing university,nanjing 2.0093,china 1. State Key Laboratory of Millimeter Waves school of Electronic Science and engineering Southeast University Nanjing 210096 China2. School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China

By optimizing the microwave chemistry reactor made of the rectangular waveguide resonator,the methane conversion(the maximum 93.7%),the C2 hydrocarbon yield(the maximum 91.0%) and the acetylene yield(the maximum 88.6%) were all greatly increased under the microwave ***,for the optimal reactor,the change of the methane conversion and the C2 hydrocarbon yield is little within the range of the pressures in the *** C2 hydrocarbon is mainly made up of acetylene,and the selectivity for acetylene is above 90%.Energy yield and space time yield of acetylene are also *** emission spectroscopy(OES) was adopted for the diagnosis of methane coupling to acetylene under microwave *** excited species(CH,C2,H2,Hα) were detected in the spectra range of 300-750 *** on the products and the excited species,the reaction mechanism of methane coupling under microwave plasma was investigated,using the thermodynamics and kinetics of the chemical reaction.

关键词： microwave plasma methane acetylene

Magnetic particles and cadmium sulfide nanoparticles tagging for signal-amplifying detection of nucleic acids

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Science china chemistry 2011年第8期54卷 1304-1310页

作者： DONG XiaoYa, ZHAO WeiWei, XU JingJuan & CHEN HongYuan State Key Laboratory of Analytical chemistry for Life Science school of chemistry and chemical engineering, nanjing university, nanjing 2.0093, china 1. State Key Laboratory of Analytical chemistry for Life Science school of chemistry and chemical engineering Nanjing University Nanjing 210093 China

A versatile DNA recognition system using cadmium sulfide nanoparticles (CdS NPs) as labels was proposed for ultrasensitive detection of specific sequence DNA based on target recycling. This strategy utilized the magnetic particles (MNPs) for the immobilization of linker DNA and CdS NPs and the subsequent target DNA hybridization. Using the unique characteristic of nicking endonuclease for cutting one specific strand of double strand DNA (ds DNA), the linker DNA could be transected and the target DNA could be liberated for re-hybridization and hence the amount of released CdS NPs was enhanced. Due to the advantage of the MNPs and signal amplification from the target recycling, the analyte DNA could be detected by the square-wave stripping voltammetry (SWV) in a wide linear range from 0.4 fM to 100 fM with the detection limit down to 0.08 fM. The proposed DNA detection strategy possesses high sensitivity, satisfactory reproducibility and excellent stability, which might have potential in other DNA biological assays.

关键词： CdS nanoparticles square wave stripping voltammetry nicking endonuclease electrochemical DNA assay

Two bimetallic W(Ⅳ)-Mn(Ⅱ) complexes based on octacyanometallates:structures and magnetic properties

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Science china chemistry 2009年第11期52卷 1801-1807页

作者： LIU BaoLin,XIAO HongPing,SONG You & YOU XiaoZeng State Key Laboratory of Coordination chemistry,nanjing National Laboratory of Microstructures,school of chemistry and chemical engineering,nanjing university,nanjing 2.0093,china State Key Laboratory of Coordination chemistry Nanjing National Laboratory of Microstructures School of Chemistry and Chemical Engineering Nanjing University Nanjing China

Two cyano-bridged heterobimetallic coordination polymers,[{Mn(dpa)2}2W(CN)8·CH3CN·4H2O]n(1)(dpa = 2,2'-dipyridylamine) and [Mn2(H2O)4{W(CN)8}·3H2O]n(2),have been synthesized and characterized structurally and magnetically.X-ray analysis shows that complex 1 is a one-dimensional(1-D) polymer of W2(CN)4Mn2 square units in which adjacent square fragments are interlinked by sharing [W(CN)8]4-moieties to form an infinite *** 2 is a three-dimensional(3-D) polymer,which shows an unforeseen structure,exhibiting a 3-D open network with a 1-D channel(ca.13.21  × 11.82 ).Fitting of the magnetic properties indicates that both polymers exhibit weakly antiferromagnetic interactions between the adjacent Mn ions.

关键词： cyano-bridged coordination polymer magnetic property manganese(Ⅱ) complex