中国化学快报

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Assembly of a Library of Trisaccharides as Mimics of Sialyl Lewis X via Random Combination Strategy

Xiang Bao MENG, Hui LI, Qing LI, Tie Ming CHENG, Zhong Jun LI

中国化学快报. 2004, 15(04): 379-382.

摘要 ( )

可视化

A small library containing six positional isomers of fucosyl on the modified lactoside backbone as mimics of the Sialyl Lewis X was synthesized via random combinatorial glycosylation, which was charactered by ESI-MS and HPLC.

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Convenient Synthesis of Bis (oxazoline) Dicarboxylate Derivatives

Bin FU, Da Ming DU, Qing XIA

中国化学快报. 2004, 15(04): 383-385.

摘要 ( )

可视化

The synthesis of bis (oxazoline) dicarboxylate derivatives was investigated. Diethyl-aminosulfur trifluoride (DAST) was used as a convenient cyclization reagent in the synthesis of bis (oxazoline) dicarboxylate derivatives, which can not be obtained by the general method using MsCl and Et₃N as dehydrating cyclization reagent.

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The Preparation of α-Phosphonovinylzirconocenes and their Application in the Stereospecific Synthesis of α-Halo-1-alkenylphosphonates

Zheng Chang XIONG, Lu Ling WU, Xian HUANG

中国化学快报. 2004, 15(04): 386-388.

摘要 ( )

可视化

Hydrozirconation of 1-alkylnylphosphonates gives the organozirconium (IV) complexes 2 in syn-addition way. Complexs 2 was trapped with NCS, NBS or I₂ to afford stereodifinedα-halo-1-alkenylphosphonates in moderate to high yields.

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Ceric Ammonium Nitrate-mediated Oxidative Cycloaddition of 1, 3-Dicarbonyls to β-Aryl-α, β-unsaturated Ketones

Wei ZHANG, Cong De HUO, Zheng Gang LIU, Zhong Li LIU

中国化学快报. 2004, 15(04): 389-391.

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可视化

Regio and stereoselective synthesis of substituted dihydrofurans were accomplished by ceric ammonium nitrate mediated oxidative cycloaddition of 1, 3-dicarbonyls to β-aryl-α, β-unsaturated ketones in moderate yields.

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Synthesis of a Novel Conjugate of Dibenzoyldiazomethane and Polyamide Containing N-Methylimidazoles

Dan LIU, Gu YUAN

中国化学快报. 2004, 15(04): 392-393.

摘要 ( )

可视化

A novel conjugate of dibenzoyldiazomethane and polyamide containing N-methylimida-zoles was synthesized by a chloroform reaction and a DCC/HOBT coupling reaction.

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The Selective Reduction of 4-Propylthio-2-nitroaniline With CO Using Ru₃(CO)₁₂/PEDPA Complex as Catalyst

Jing Yang JIANG, Qiang MIAO, Yan Hua WANG, Zi Lin JIN

中国化学快报. 2004, 15(04): 394-396.

摘要 ( )

可视化

The Ru₃(CO)₁₂/PEDPA complex was firstly applied in the CO selective reduction of 4-propylthio-2-nitroaniline. The effects of reaction temperature, the pressure of CO and concentration of catalyst on the reduction were investigated.Under the optimum conditions of T=140℃, P_CO=5.0MPa and substrate/catalyst=300(molar ratio), the conversion and selectivity were 70% and 98%, respectively.After simple phase separation, the catalyst could be recycled.

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Studies on the Total Synthesis of Hainanolide (VIII)-Introducing C₄-Methoxy Group, and Forming the Ring E (lactone)

Yan Wu LI, Li Ya ZHU, Liang HUANG

中国化学快报. 2004, 15(04): 397-399.

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可视化

The titled compound 6a and 6b were synthesized from tricyclic ketone 1 through five steps.

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A New Efficient Synthesis of p-Nitrocalix[4]arene

Yong LI, Jia Song WANG, Qi WANG, De Shan LI

中国化学快报. 2004, 15(04): 400-403.

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可视化

A new efficient synthesis of p-nitrocalix[4]arene from calix[4]arene by using nitrogen dioxide is described. The compound is an useful intermediates for the introduction of other functional groups to obtain N containing substituted calix[4]arene.The reaction mechanism is briefly discussed.

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Design, Synthesis and Antifungal Activity of Novel Triazole Derivatives

Chun Quan SHENG, Wan Nian ZHANG, Hai Tao JI, Yun Long SONG, Min ZHANG, You Jun ZHOU, Jia Guo L, J, ZHU

中国化学快报. 2004, 15(04): 404-407.

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Twenty-one 1-(1H-1, 2, 4-triazolyl)-2-(2, 4-diflurophenyl)-3-(4-substituted-1-piperazinyl)-2-propanol derivatives were designed and synthesized, on the basis of the active site of lanosterol 14α-demethylase.In vitro antifungal activities showed that some of the target compounds had higher antifungal activity and broader antifungal spectrum than fluconazole.

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The First and Facile Synthesis of (±) Syringaresinol

Zhong Hong YAN, Chun Hao YANG, Xi Han WU, Yu Yuan XIE

中国化学快报. 2004, 15(04): 408-410.

摘要 ( )

可视化

The first and facile synthesis of(±)syringaresinol was described.

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Preparation of D-Phenylalanine by Asymmetric Transformation

Ben Mei WEI, Li Jian JIANG, Ying Ping ZHENG, Hai Qing XU

中国化学快报. 2004, 15(04): 411-412.

摘要 ( )

可视化

The method of preparing D-phenylalanine by asymmetric transformation is reported.D-phenylalanine was prepared from DL-phenylalanine by two-step reaction.D-phenylalanine (2S, 3S)-tartrate was prepared by heating DL-phenylalanine, salicylaldehyde, and (2S, 3S)-tartaric acid in propionic acid;the obtained D-phenylalanine (2S, 3S)-tartrate was treated with triethylamine in ethanol giving D-phenylalanine with 98% optical purity in 69% yield.

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A Novel Peptide from Buthus Martensii Karch

Zheng Yu CAO, Xuan XIAO, Xue Mei LIU, Xiao Tian LIANG, De Quan YU

中国化学快报. 2004, 15(04): 413-416.

摘要 ( )

可视化

A novel peptide was purified and characterized from Buthus martensii Karch.The peptide, named BmK M6, is a single-chain polypeptide cross-linked by four intramolecular disulfide bridges.The molecular weight of the peptide was determined by MOLDI-TOF-MS as 7034 Da.The partial amino acid sequence of BmK M6 from N-terminal is VRDAYIAKPEN CVYECGITQDCNKLCTENG.

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A New Guaianolide from Saussurea Macrota

Min YANG, Zhong Jian JIA

中国化学快报. 2004, 15(04): 417-418.

摘要 ( )

可视化

A new guaianolide was isolated from Saussurea macrota.Its structure was elucidated by NMR spectroscopic and X-ray diffraction methods.

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A New Cytotoxic Sterol Produced By an Endophytic Fungus from Castaniopsis Fissa at the Couth China Sea Coast

Hou Jin LI, Yong Cheng LIN, L. L. P. VRIJMOED, E. B. G. JONES

中国化学快报. 2004, 15(04): 419-422.

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可视化

A new sterol, ergosta-8(9), 22-diene-3, 5, 6, 7-tetraol (3β, 5α, 6β, 7α, 22E) (A) together with three known sterols:3β, 5α, 6β-trihydroxyergosta-7,22-diene (B), 3β-hydroxy-5α,8α-epidioxyer-gosta-6, 22-diene (C) and ergosterol (D) were isolated from the mycelia of an unidentified endophytic fungus separated from Castaniopsis fissa (chestnut tree). Compound A exhibited potent selective cytotoxicity against Bel-7402, NCI4460 and L-02 cell lines with IC₅₀ values 8.445, 5.03, 13.621 μg/mL, respectively.

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Two New Benzofuran Derivatives From Ligularia Stenocephala

Fu Lin YAN, Ai Xia WANG, Zhong Jian JIA

中国化学快报. 2004, 15(04): 423-424.

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可视化

Two new benzofuran derivatives were isolated from the roots of Ligularia stenocephala.Their structures were established by spectroscopic methods and 2D NMR experiments.

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Two New Diterpene Acetylxylosides From Aster Veitchianus

Er Wei LI, Kun GAO, Zhong Jian JIA

中国化学快报. 2004, 15(04): 425-427.

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可视化

Two new acetylxylosides, ent-manool-13-O-β-D-2'-acetylxylopyranoside (1) and ent-manool-13-O-β-D-2', 4'-diacetylxylopyranoside (2) were isolated from Aster veitchianus.Their structures were elucidated by spectroscopic methods.

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Capillary Column Coated With Heptakis (2, 3, 6-tri-O-octyl)-β-cyclodextrin Using Sol-gel Technology

Xiao Xia GE, Ruo Nong FU, Rong Ji DAI, Li Wen LIU, Mei Ling QI

中国化学快报. 2004, 15(04): 428-430.

摘要 ( )

可视化

Heptakis (2, 3, 6-tri-O-octyl)-β-cyclodextrin was coated onto the fused silica capillary by sol-gel technology.Column efficiency and column selectivity were studied. The results indicated that high ability of separation was acquired. Positional isomers of aromatic compounds were well separated.

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Metabolites of A Novel Antibiotic Bitespiramycin in Rat Urine and Bile

Xiang Guo SHI, Da Fang ZHONG, Yu Ming SUN, Yu Feng ZHANG

中国化学快报. 2004, 15(04): 431-434.

摘要 ( )

可视化

A sensitive analytical method to identify active metabolites of bitespiramycin in rat urine and bile was developed by liquid chromatography-electrospray ionization tandem mass spectrometry (LC/ESI-MSⁿ).Bitespiramycin and its major active metabolites in rat urine and bile were isolated and identified as M1 serial (spiramycin I, Ⅱ, Ⅲ), M2 serial (platenomycin A1, josamycin and leucomycin A1) and M3 serial (deisovalerylplatenomycin A1, deisovaleryl-josamycin, deisovalerylleucomycin A1).

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Preparation of Monolithic Column and Its Application in p-CEC

Jun Jiao YANG, Kai ZHANG, Ru Yu GAO, Yu Kui ZHANG, Chao YAN

中国化学快报. 2004, 15(04): 435-438.

摘要 ( )

可视化

A novel monolithic stationary phase having long alkyl chain ligands was introduced and evaluated in pressurized-capillary electrochromatography of small neutral and charged compounds.The monolithic column was prepared by the in situ copolymerization of ethylene dimethacrylate, 1-hexadecene, allyl alcohol and 2-acrylamido-2-methyl-1-propanesulfonic acid in a quaternary porogenic solvent mixture consisting of 1, 4-butanediol, cyclohexanol, dodecanol and water.

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A New Dual-electrode and Multi-channel Electrochemical DetectionSystem for Capillary Electrophoresis

Bing Yi YANG, Jin Yuan MO, Rong LAI

中国化学快报. 2004, 15(04): 439-442.

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可视化

A new type of dual-electrode and multi-channel electrochemical detection technology for capillary electrophoresis is described in this paper. Two detectors (the amperometric detector and the conductometric detector) or two conductometric detectors are connected to the same capillary electrophoresis system. The whole system possesses the advantages of the two electrochemical detectors including sparing time, improving the analytical speed and expanding the sample range.The working electrode and detector cell are handled easily.The system was applied to sample detection with satisfactory results.

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Studies of Ce (Ⅲ)-ALC-F^-iInteracting With Herring Sperm DNA by Electrochemical, Fluorimetric and UV-spectrophotometric Method

Guang Han LU, Wei LIU, Chuan Yin LIU, Li Ping JIANG, Feng SONG

中国化学快报. 2004, 15(04): 443-446.

摘要 ( )

可视化

Ce (Ⅲ)-ALC-F^-complex can react with hsDNA to form an electrochemically non-active supermolecular complex Ce (Ⅲ)-ALC-F^--DNA in the buffer solution of (CH₂)₆N₄ (pH=4.9), which results in the decrease of the peak current of Ce (Ⅲ)-ALC-F^-.This method can be applied to determine DNA concentration. In addition, by using fluorimetric and UV-spectrophotometric methods with studies of denatured DNA and the effect of NaCl solution, it is also found that the binding mode is intercalation.

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Direct Electrochemistry With Nitrate Reductase in Chitosan Films

Xiao Xia CHEN, Jing Bo HU, Hong WU, Hui Bo SHAO

中国化学快报. 2004, 15(04): 447-448.

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可视化

Stable films made from chitosan (CS) on pyrolytic graphite electrode (PGE) gave direct electrochemistry for incorporated enzyme nitrate reductase (NR).Cyclic voltammetry of CS/NR films showed a pair of well-defined and nearly reversible redox peaks at about-0.430 V vs.SCE at pH 7.0 phosphate buffers.

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Preparation and Adsorption Properties of PAM Based Adsorbents for Plasma Lipoproteins

Hai Tao LI, Zhi YUAN, Xin Fu CHEN, Bin LIU, Bin SHEN, Bing Lin HE

中国化学快报. 2004, 15(04): 449-452.

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可视化

Crosslinked macroporous polyacrylamide (PAM) was prepared with inverse phase suspension polymerization technique.After treatment with hydrazine, the polymer was functionalized with chloroacetic acid, trifluoroacetic acid diethylenetriaminepentaacetic acid (DEPAA), and maleic acid, respectively, and PAM based adsorbents bearing carboxyl functional groups for low density lipoprotein (LDL) apheresis use were obtained.The blood compatibility and the adsorption properties for plasma lipoproteins of PAM based adsorbents were investigated.

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Direct Electrochemical Reaction of Horseradish Peroxidase Immobilized on the Surface of Active Carbon Powders

Dong Mei SUN, Chen Xin CAI, Wei XING, Tian Hong LU

中国化学快报. 2004, 15(04): 453-454.

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可视化

It is reported for the first time that horseradish peroxidase (HRP) immobilized on the active carbon can undergo a direct quasi-reversible electrochemical reaction. In addition, the immobilized HRP showed the stable bioelectrocatalytic activity for the reduction of H₂O₂.

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Increase the Degradation Efficiency of Organic Pollutants With a Radical Scavenger(Cl^-)in a Novel Photoelectrocatalytic Reactor

Tai Cheng AN, Wen Bing ZHANG, Gui Ying LI, Jia Mo FU, Guo Ying SHENG

中国化学快报. 2004, 15(04): 455-458.

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Photoelectrocatalytic degradation performance of quinoline in saline water was investigated using a new-designed continuous flow three-dimensional electrode-packed bed photocatalytic reactor.It is interesting to find that chloride ion has an obvious enhancement effect rather than a scavenging effect on the photoelectrocatalytic degradation of quinoline, and create a kinetic synergetic effect in the photoelectrocatalytic reactor.

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The Effect of Cyclodextrins in Polymer Particles Synthesis

Jie HU, Bai Ling LIU

中国化学快报. 2004, 15(04): 459-462.

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The free radical polymerization of styrene in water in the presence of β-cyclodextrin (β-CD) is described.It is found that β-CD could greatly accelerate the polymerization, enhance the final conversion of monomer.The particle-size distribution of the final polymer is also improved than that without β-CD in the system.

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Study on Interaction Between Chitosan and CdS Quantum Dots via Photoluminescence Spectra

Zhan LI, Yu Min DU, Yan WEN

中国化学快报. 2004, 15(04): 463-466.

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可视化

The interaction between CdS quantum dots and amino polysaccharide chitosan in aqueous solution was studied via photoluminescence (PL) spectra. The surface binding of chitosan with different molecular weight (MW) quenched the luminescence of QDs due to the elimination of radioactive anion vacancy centers.This process fits well with the Perrin model;lower MW chitosan exhibits higher quenching efficiency due to better availability to the surface.

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Prediction of the Aqueous Solubilities of Polychlorinated Biphenyls

Shu Shen LIU, Shi Hai CUI, Lian Sheng WANG

中国化学快报. 2004, 15(04): 467-470.

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可视化

Using the molecular electronegativity distance vector descriptors derived directly from the molecular topological structures, the aqueous solubilities of polychlorinated biphenyls (PCBs) were predicted. A three-variable regression equation with correlation coefficient of 0.9739 and the root mean square errors of 0.26 was developed. The descriptors included in the equation represent three interactions between three pairs of atomic types, i.e., atom -C=and>C=, -C=and-Cl, and-Cland-Cl.It has been proved that the aqueous solubilities of 137 PCB congeners can be accurately predicted as long as there are more than 65 calibration compounds.

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Preparation of Mn₃O₄ Nanofibres via An Electrospinning Technique

Chang Lu SHAO, Hong Yu GUAN, Shang Bin WEN, Bin CHEN Xing Hua YANG, Jian GONG

中国化学快报. 2004, 15(04): 471-474.

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可视化

Thin PVA/manganese acetate composite fibres were prepared by using sol-gel processing and electrospinning technique.After calcinations of the above precursor fibres, Mn₃O₄ nanofibres with a diameter of 50-200 nm could be successfully obtained.The fibres were characterized by SEM, FT-IR, XRD.The results showed that the crystalline phase and morphology of nanofibres were largely influenced by the calcination temperature.

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Chitosan-Immobilized Palladium Complex:A Green and Highly Active Heterogeneous Catalyst for Heck Reaction

Pu LIU, Lan WANG, Xiang Yu WANG

中国化学快报. 2004, 15(04): 475-477.

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可视化

A green heterogeneous catalyst for Heck reaction-chitosan-immobilized palladium complex was prepared.The catalyst exhibits high activity and stereoselectivity under the moderate reaction conditions.The catalyst can be separated easily from the reaction mixture and reused after washing. Under the suitable reaction conditions, the cross-coupling of iodobenzene (ArI) with acrylic acid (AA) or acrylate can be achieved 93.3% or 99% yield of trans-cinnamic acid or trans-cinnamic ester.

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Template Polymerization-solvent Extraction:A New Method for Fabrication of Hollow Polysiloxane Particles

Hui Gang WANG, Ping CHEN, Xiao Ming ZHENG

中国化学快报. 2004, 15(04): 478-481.

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可视化

Hollow polysiloxane particles with diameters between 1.40 and 1.60 micrometres were fabricated by consecutive cocondensation of methyltrimethoxysilane and diphenyldimethoxysilane monomers onto polydiphenylsiloxane, subsequently removing the templated polydiphenylsiloxane by exposure to solvents.TEM and AFM measurement reveal that there are obvious hollow sphere structures for the polysiloxane microsphere particles.The hollow spheres are envisioned to have applications in areas ranging from dye-industry, catalysis, pharmaceutics to materials science.

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Novel Fluorene-based Conjugated Copolymer Containing Cyclobutenedione Unit for Light Emitting Diodes

Qiang PENG, Yan HUANG, Zhi Yun LU, Ping ZOU, Ming Gui XIE

中国化学快报. 2004, 15(04): 482-485.

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可视化

A novel fluorene-based conjugated copolymer containing cyclobutenedione unit was synthesized by Suzuki reaction. Its structure and properties were characterized by FTIR, ¹HNMR, elemental analysis, PL spectroscopy, DSC, TGA and cyclic voltammetry. The resulting polymer shows strong yellow PL emission (561 nm) and good solubility in polar aprotic solvents, i.e.THF, DMF, DMAC, DMSO, etc. DSC and TGA studies reveal that the novel polymer possesses excellent thermal stability with high glass transition temperature of 127℃ and onset decomposition temperature of 411℃.Cyclic voltammetry measurement demonstrated that the polymer has both hole and electron-transporting property.

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An Electrochemical Study on the Corrosion Inhibition of Stainless Steel by Polyaniline Film

Hao WANG, Lin NIU, Qiu Hong LI, Su Xiang WU, Feng Hua WEI

中国化学快报. 2004, 15(04): 486-488.

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可视化

Polyaniline (PANI) film was electrosynthesized on 304 stainless steel by cyclic voltammetry using aqueous oxalic acid as supporting electrolyte. The potential sweep rates were changed to achieve the PANI film with different thickness and structures. Protective properties of the PANI film for corrosion of stainless steel in 3% NaCl aqueous solution were investigated by monitoring potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS).The results showed that the PANI film which was formed with lower sweep rate led to more positive shift of corrosion potential and greater charge transfer resistance, reflecting higher inhibition for corrosion of the stainless steel.

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Synthesis and Nonlinear Optical Property of a Polyphosphazene With High Glass Transition Temperature

Zhen LI, Jin Gui QIN, Zhou YANG, Cheng YE

中国化学快报. 2004, 15(04): 489-491.

摘要 ( )

可视化

Polyaniline (PANI) film was electrosynthesized on 304 stainless steel by cyclic voltammetry using aqueous oxalic acid as supporting electrolyte. The potential sweep rates were changed to achieve the PANI film with different thickness and structures. Protective properties of the PANI film for corrosion of stainless steel in 3% NaCl aqueous solution were investigated by monitoring potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS).The results showed that the PANI film which was formed with lower sweep rate led to more positive shift of corrosion potential and greater charge transfer resistance, reflecting higher inhibition for corrosion of the stainless steel.

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Preparation of Co₃O₄ Nanofibers via an Electrospinning Technique

Chang Lu SHAO, Hong Yu GUAN, Shang Bin WEN, Bin CHEN Xing Hua YANG, Jian GONG, Yi Chun LIU

中国化学快报. 2004, 15(04): 492-494.

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可视化

Thin PVA/cobalt acetate composite fibers were prepared by using sol-gel processing and electrospinning technique.After calcination of the above precursor fibers, Co₃O₄ nanofibers with a diameter of 50-150 nm could be successfully obtained.The fibers were characterized by SEM, FT-IR, WAXD, respectively.

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Crystal structures of Two Potential Tumor Imaging Agents and Therapeutic Agents-Copper (II) Ternary Complexes With Salicylidene-tyrosinato Schiff Base and Nitrogen-donor Chelating Lewis Base

Ming Zhao WANG, Guan Liang CAI, Ling XIA, Jun Jian YAO, Hong Yan CHEN, Zhao Xing MENG, Bo Li LIU

中国化学快报. 2004, 15(04): 495-497.

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可视化

The crystal structures of two potential tumor imaging agents and therapeutic agents-copper (Ⅱ) complexes with salicylidene-tyrosinato Schiff base and nitrogen-donor chelating Lewis base,[Cu (sal-tyr) (bipy)] 1 and[Cu (sal-tyr) (phen)]·2CH₃OH 2, are presented. Our work is helpful to get deep understanding of novel ⁶⁴Cu tumor imaging agents and therapeutic agents.

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Singlet H-cCNC-C:A Potential Interstellar Molecule

Hai Tao YU, Ming Xia LI, Hong Gang FU, Bai Fu XING, Jia Zhong SUN

中国化学快报. 2004, 15(04): 498-500.

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可视化

A new planar isomer of HNC₃ system, H-cCNC-C, is theoretically predicted by means of B3LYP and CCSD (T) methods. The suggested species can isomerize into other five kinetically more stable isomers, which have been experimentally identified, with relatively higher reaction barriers. In view of its higher kinetic stability, we can reasonably believe that the obtained species H-cCNC-C can be experimentally observed in future studies.

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A Novel Exact Fixed-node Quantum Monte Carlo Algorithm

Hong Xin HUANG

中国化学快报. 2004, 15(04): 501-504.

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可视化

In this paper we proposed a novel exact fixed-node quantum Monte Carlo (EFNQMC) algorithm, which is a self-optimizing and self-improving procedure. In contrast to the previous EFNQMC method, the trial function is optimized synchronistically in the diffusion procedure, but not before the beginning of EFNQMC computation. In order to optimize the trial function, the improved steepest descent technique is used, in which the step size is automatically adjustable. The procedure is quasi-Newton and converges super linearly. We also use a novel trial function, which has correct electron-electron and electron-nucleus cusp conditions. The novel EFNQMC algorithm and the novel trial function are employed to calculate the energies of 1¹A₁ state of CH₂, ¹A_g state of C₈ and the ground-states of H₂, LiH, Li₂, H₂O, respectively. The test results show that both the novel algorithm and the trial function proposed in the present paper are very excellent.

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2004年, 第15卷, 第04期　刊出日期：2004-04-20

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2004年, 第15卷, 第04期 刊出日期：2004-04-20

2004年, 第15卷, 第04期　刊出日期：2004-04-20