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Synthesis of octahedral δ-Bi2O3 via a microwave-assisted hydrothermal process

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Synthesis of octahedral δ-Bi2O3 via a microwave-assisted hy...

Pyridine-H_5PMo_(10)V_2O_(40) hybrid catalysts for liquid-phase hydroxylation of benzene to phenol with molecular oxygen

中国化学会第六届全国结构化学学术会议

作者： State Key Laboratory of Coordination chemistry,nanjing National Laboratory of Microstructures,school of chemistry and chemical engineering,nanjing university, nanjing 210093,china.

Bismuth oxide(BiO) is an attractive functional material used in photocatalysts,fuel cells,optical coating,gas sensors et al.,owing to their excellent electrical conductivity,thermal properties and narrow band-gap(2.8 eV).Among the four known bismuth oxide(BiO) polytypes(α-,β-,γ-,andδ-BiO),δ-phase is the high temperature phase and stable only in the temperature range from 730℃to its melting

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Science china chemistry 2009年第8期52卷 1264-1269页

作者： GE HanQing1,LENG Yan1,ZHANG FuMin1,PIAO JiaRui2,ZHOU ChangJiang1 & WANG Jun1 1 State Key Laboratory of Materials-Oriented chemical engineering,College of chemistry and chemical engineering,nanjing university of Technology,nanjing 210009,china 2 Petrochemical Research Institute,Petrochina Company Ltd.,Beijing 100083,china 1. State Key Laboratory of Materials-Oriented chemical engineering College of Chemistry and Chemical Engineering Nanjing University of Technology Nanjing 210009 China 2. Petrochemical Research Institute PetroChina Company Ltd. Beijing 100083 China

Pyridine(Py)-modified Keggin-type vanadium-substituted heteropoly acids(PynPMo10V2O40,n=1 to 5) were prepared by a precipitation method as organic/inorganic hybrid catalysts for direct hydroxylation of benzene to phenol in a pressured batch reactor and their structures were detected by *** various catalysts,Py3PMo10V2O40 exhibits the highest catalytic activity(yield of phenol,11.5%),without observing the formation of catechol,hydroquinone and benzoquinone in the reaction with 80 vol% aqueous acetic acid,molecular oxygen and ascorbic acid used as the solvent,oxidant and reducing reagent,*** of reaction temperature,reaction time,oxygen pressure,amount of ascorbic acid and catalyst on yield of phenol were investigated to obtain the optimal reaction conditions for phenol *** can greatly promote the catalytic activity of the Py-free catalyst(H5PMo10V2O40),mostly because the organic π electrons in the hybrid catalyst may extend their conjugation to the inorganic framework of heteropoly acid and dramatically modify the redox properties,at the same time,pyridine adsorbed on heteropoly acids can promote the effect of "pseudo-liquid phase",thus accounting for the enhancement of phenol yield.

关键词： hydroxylation benzene organic/inorganic hybrid catalyst phenol heteropoly acid pyridine

Efficient Cleavage of DNA by the Novel Copper (II) Complex Derived From 2,2'-Pyridil Ligand

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Chinese chemical Letters 2001年第6期12卷 495-496页

作者： Rui REN1,3, Pin YANG2 1Biotechnology laboratory, Shanxi university, Taiyuan 030006 2Institute of Molecular Science, Shanxi university, Taiyuan 030006 3State Key Laboratory of Coordination chemistry, nanjing university, nanjing 210093 Shanxi Univ Biotechnol Lab Taiyuan 030006 Peoples R China Shanxi Univ Inst Mol Sci Taiyuan 030006 Peoples R China nanjing Univ State Key Lab Coordinat Chem Nanjing 210093 Peoples R China

Copper (II) complex derived from 2, 2'-pyridil ligand has been, demonstrated to cleave efficiently DNA at micromolar concentrations at room temperature and pH 7.25.

关键词： copper (II) complex DNA efficient cleavage

Electrochemical behavior of Cu(II) reduced in CH3OH and DMSO

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Rare Metals 2003年第3期22卷 210-214页

作者： SONG Jiguo, SONG Huacan, and YANG Qiqinschool of chemistry and chemical engineering, Zhongshan university, Guangzhou 510275, china school of chemistry and Chemicul engineering Zhongshan University Guangzhou 510275

The cyclic voltammetry and the potential-time curve after galvanostaticelectrolysis were used to study the electrode processes of Cu(II) in CH_3OH solution and DMSOsolution. The electroreduction of Cu(II) to Cu on a Pt electrode proceeds in two steps: Cu(II) + evelence Cu(I); Cu(I) + e velence Cu. The reduction potential of Cu(II) in DMSO solution is morenegative than that in CH_3OH solution, and the diffusion coefficient of Cu(II) ion in DMSO solutionis larger than that in CH_3OH solution because the polarity of DMSO is larger than that of CH_3OHobservably and has a stronger solvating power.

关键词： electrochemistry electroreduction of Cu(II) cyclic voltammetry diffusioncoefficient solvability

DNA Cleavage by Copper (Ⅱ) Complexes Without added Coreactants

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Chinese chemical Letters 1999年第5期10卷 383-386页

作者： Rui REN Pin YANG Gao Yi HAN(Institute of Coordination chemistry. State Key Laboratory of Coordination chemistry.nanjing university. nanjing 210093Institute of Molecular Science. Shanxi university. Taiyuan 030006) Institute of Coordination chemistry State Key Lab. of Coord. Chemistry Nanjing University Nanjing 210093 China Institute of Molecular Science Shanxi University Taiyuan 030006 China

The cleavage activity of complexes between copper (Ⅱ) and four different amino acidor amino acid methyl ester on DNA was tested at physioloical pH and temperature., It was found that Cu (Ⅱ)-L-His and Cu (Ⅱ)-L-His methyl ester complexes could cleane DNA. The extent ofDNA cleavage is largely dependent on the metal ion-to-ligand ratio. The cleavage of doublestranded DNA mediated by Cu (Ⅱ)-L-His complexes occurs via a hydrolytie mechanism.

关键词： Copper (Ⅱ) complexes DNA hydrolytic cleavage

Formulation Design of the Multi-component Cement Additive by Using engineering Statistics

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Journal of Wuhan university of Technology(Materials Science) 2010年第3期25卷 538-544页

作者：黄弘沈晓冬 State Key Laboratory of Materials-oriented chemical engineering College of Material Science and EngineeringNanjing University of Technology

A novel methodology for the formulation design of the multi-component cement additive for the low early strength blend cement was presented by using engineering *** of cement additive such as triethanolamine,chloride,saccharide and a kind of divalent alcohol were simultaneously tested according to the arrangement of response surface *** models were established to express the quantitative relationship between the chemical components of cement additive and the compressive strength of treated blend *** effectiveness and the possible interactions of these four chemicals contributing to the strength development of blend cement were further explored by the pareto chart and the contour *** according the performance analysis of four chemicals,the optimized formulations were brought forward and were validated in practical trials by Turkey＇s multiple comparison.

关键词： cement additive blend cement effectiveness interaction engineering statistics

Silylated and acetylated β-cyclodextrins for gas chromatographic stationary phases

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Journal of Central South university of Technology 2001年第4期8卷 239-243页

作者： TANG Ke wen 1,2 ,YI Jian ming 2,ZHOU Chun shan 1,ZHONG Shi an 1 (1. College of chemistry and chemical engineering, Central South university, Changsha 410083, china 2. College of chemistry and chemical engineering, Yueyang Normal university 1. College of chemistry and chemical engineering Central South University 410083 Changsha China 2. College of chemistry and chemical engineering Yueyang Normal University 414000 Yueyang China

Two new chiral stationary phases, 2,3 di O acetyl 6 O trimethylsilyl β cyclodextrin (DATBCD) and 2,6 di O trimethylsilyl 3 O acetyl β cyclodextrin(DTABCD), were synthesized, their structures were identified by means of infrared and NMR spectra. Capillary columns were coated with the two stationary phases by dynamic method. The chromatographic properties, and enantiomers separation, such as ketone, esters, alcohols and olefines, were investigated on the silylated and acetylated β cyclodextrin stationary phases. The experimental results show that the silylated and acetylated β cyclodextrins are suitable to be used as capillary gas chromatographic stationary phases, the relative polarity of DATBCD and DTABCD stationary phases is respectively 4143 and 3928, the column efficiencies are respectively 3084 and 4198, and DATBCD is of stronger enantioselectivity than DTABCD, capacity factor of the first eluted enantiomer ( k 1) and separation factor(α)of α phenylethanol on DATBCD stationary phase are respectively 8.23 and 1.019.

关键词： capillary gas chromatography silylated and acetylated β-cyclodextrins enantiomeric separation

An efficient chiral synthesis of (R)-N-[3-acetyl-4-(2-hydroxy-3-isopropylamino-propoxy)phenyl]-butanamide with high enantioselectivity

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Science china chemistry 2009年第8期52卷 1216-1219页

作者： WANG NaiXing1,2 & TANG XinLiang1,3 1 Technical Institute of Physics and chemistry,Chinese Academy of Sciences,Beijing 100080,china 2 College of chemistry and chemical engineering,Graduate university of Chinese Academy of Sciences,Beijing 100049,china 3 school of chemical engineering and Environment,Beijing Institute of Technology,Beijing 100081,china 1. Technical Institute of Physics and chemistry Chinese Academy of Sciences Beijing 100080 China 2. College of chemistry and chemical engineering Graduate University of Chinese Academy of Sciences Beijing 100049 China 3. school of chemical engineering and Environment Beijing Institute of Technology Beijing 100081 China

R-Enantiomer of the β-receptor antagonist N-[3-acetyl-4-(2-hydroxy-3-isopropylamino-propoxy)phenyl] butanamide with high enantioselectivity was synthesized from cheap starting materials and enantiopure chiral reagent through an efficient,convenient and practical synthetic *** product was detected by 1H NMR,13C NMR,and MS,and the enatiomeric excess was determined by chiral HPLC analysis using a chiracel AD-H column.

关键词： chiral synthesis enantioselectivity enatiomeric excess chiral HPLC analysis

Novel nanoporous binary Ag-Ni electrocatalysts for hydrazine oxidation

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Rare Metals 2010年第1期29卷 26-31页

作者： YI Qingfeng, LI Lei, YU Wenqiang, LIU Xiaoping, ZHOU Zhihua, and NIE Huidong school of chemistry and chemical engineering, Hunan university of Science and Technology, Xiangtan 411201, china school of chemistry and chemical engineering Hunan University of Science and Technology

From an aqueous mixture of Ag（I）-EDTA complex and Ni（II） nitrate, silver and nickel particles were co-deposited on the surface of titanium substrates by the hydrothermal method using hydrazine hydrate as a reduction agent. The prepared titanium-supported nano-scale Ag and Ag-Ni particles （nano Ag/Ti, nano Ag86Ni14/Ti, nano Ag77Ni23/Ti, and nano Ag74Ni26/Ti） exhibit nanoporous 3D network textures. Their electrocatalytic activity towards hydrazine oxidation in alkaline solutions was evaluated by cyclic voltammetry and chronoamperometry. The results show that the four samples present a low onset potential of ca. -0.60 V vs. SCE and considerably high and stable anodic current densities for hydrazine oxidation. Among them, the nano Ag86Ni14/Ti electrode exhibits the highest anodic current density towards hydrazine oxidation, showing an increment of electro-active sites on the nano Ag86Ni14/Ti due to the addition of Ni to Ag particles.

关键词： electrocatalyst silver hydrazine oxidation fuel cell