中国化学快报

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Synthesis of the D-Galactopyranoside Derivative of C₆₀

Guo Dong SUI, Han Chun HU, Dao Dao ZHANG, Hou Ming WU, Xia Fei LAO, Jing Fei XU

中国化学快报. 1998, 9(02): 113-115.

摘要 ( )

可视化

A D-Galactopyranoside of C₆₀ has been synthesized and its structure has been identified by the NMR, FD-MS, FT-IR spectra, etc..

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Synthesis of α-Seleno Substituted Semistabilized Arsonium Ylide and Its Wittig Reaction

Zhi Zhen HUANG, Guo Chun LAN

中国化学快报. 1998, 9(02): 117-119.

摘要 ( )

可视化

We synthesized α-seleno substituted semistabilized arsonium ylide 3 by the transylida-tion reaction and found that it could undergo Wittig reaction smoothly as a new method for synthe-sizing vinyl selenides.

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Tin Mediated Allylation of Aldimines with Allyl Bromide

Xing Hua SUN, Lei WANG, Yong Min ZHANG

中国化学快报. 1998, 9(02): 121-122.

摘要 ( )

可视化

Aldimines are allylated with allyl bromide and tin powder in tetrahydrofuran to give homoallylamines in the presence of chlorotrimethylsilane.

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Knoevenagel Condensation of Acetylacetone with Aldehydes Catalyzed by a New Catalyst Indium Trichloride

Lei WANG, Yong Min ZHANG

中国化学快报. 1998, 9(02): 123-124.

摘要 ( )

可视化

The Knoevenagel condensation of acetylacetone with aldehydes catalyzed by indium trichloride was carried out at room temperature in acetonitrile to give aryl-or alkylideneacetylacetones in moderate to good yields.

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The Friedel-Crafts Acylation of Substituted Benzene with 2-Phenylfuran-3,4-dicarboxylic Acid Anhydride

Xiao Ping NIE, Xiu Lin YE

中国化学快报. 1998, 9(02): 125-129.

摘要 ( )

可视化

2-Phenylfuran-3, 4-dicarboxylic acid anhydride reacted with seven aromatic compounds, of which five gave keto acids in yields of 94%-63%. The structure of the keto acid was elucidated by reducing it to hydroxy acid and analyzing with NMR technique.

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Studies on Diastereoselective Intramolecular meta-Cycloaddition of Arene to Olefin (Part I)

Xiu Min SHEN, Xiao Chuan GUO, Liang Dong SUN, Cong ZHANG

中国化学快报. 1998, 9(02): 131-134.

摘要 ( )

可视化

The photoinduced intramolecular meta-cycloaddition of bichromophores la-Id gave diastereoselectively two types of adducts, 2a-2d and 3a-3d. respectively. The observed stereo-chemistry of cycloaddition was rationalized in terms of hydrogen bond effect induced by the 3-hydroxy group in the 5-phenylpent-1-ene skeleton.

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Synthesis of Novel Cyclodextrin Dimers Linked by Multidentate Coordination Units

Mei Ming LUO, Ru Gang XIE, Wei LU, ping Fang XLA, Hua Ming ZHAO

中国化学快报. 1998, 9(02): 135-138.

摘要 ( )

可视化

A new type of cyclodextrin dimers (2a-c) bridged with multidentate coordination units has been synthesized by treatment of 6-deoxy-6-hydroxyethylamino-p-cyclodextrm 1 with corre-sponding dibromides in the presence of base.

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Structure Based Library Approach to Photosynthesis Inhibitors:The Solid Phase Synthesis of Hydro-Uracils and Thiouracils

Ai Ming Yu, Hua Zheng YANG, Zhen Pu ZHANG

中国化学快报. 1998, 9(02): 139-142.

摘要 ( )

可视化

A general method for the solid phase synthesis of hydro-uracils and thiouracils is de-scribed. Resino ester 2 reacts with various primary amines to give secondary amines 3, which are converted to the resino ureas (thioureas) 4 by treatment with isocyanates (isothiocyanates). Prepa-ration of the hydro-uracils and thiouracils 5 is achieved by acidic cyclization-cleavage from the resin. The synthesis is designed to be amenable for structure based library approach to photosys-tem Ⅱ D1 protein inhibitors.

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A New Anthraquinone from Clinopodium polycephalum Glyceroyl-1,6,8-trihydroxy-3-methyl-9,10-dioxo-2-anthracene Carboxylate

Jing Yu CHEN, Jian Min CHEN, Chun Lan WAN, Jun Shan YANG, Pei Gen XIAO

中国化学快报. 1998, 9(02): 143-144.

摘要 ( )

可视化

A new anthraquinone, Glyceroyl-1, 6, 8-trihydroxy-3-methyl-9, 10-dioxo-2-anthracene carboxylate I, was isolated from Clinopodium polycephalum. The chemical structure was deter-mined by spectroscopic methods.

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A New Model for Correlating the Solubility of Solids in Supercritical CO₂ and Study on Some Systems (I):The New Model

Ming Hong ZHONG, Bu Xing HAN, Jie KE, Hai Ke YAN, Ding Yu PENG

中国化学快报. 1998, 9(02): 145-148.

摘要 ( )

可视化

A model for correlating the phase equilibria of solid-supercritical fluid systems has been developed. The feature of the model is that it can be used to estimate the size of the solvent-solute clusters and the local density of the solvent in the solvent-solute clusters.

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Ring-opening Polymerization of Chloromethyl Thiirane with Catalytic Systems Composed of Lanthanide Compound and Ethyl Aluminum Sesquichloride

Wei Shi LI, Zhi Quan SHEN, Yi Feng ZHANG

中国化学快报. 1998, 9(02): 149-150.

摘要 ( )

可视化

The Ziegler-Natta type catalytic systems composed of lanthanide compound and ethyl aluminum sesquichloride are effective to convert chloromethyl thiirane to polymer of molecular weight ca. 10, 000. The effects of rare earth element and ligand were studied.

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Synergistic Effect in Special Selectivity Mixed Gas Chromatographic Stationary Phase in the Separation of Aromatic Compounds

Li Ming YUAN, Ruo Nong FU, Shi Hong GUI, Xue Xian CHEN, Rong Ji DAI

中国化学快报. 1998, 9(02): 151-155.

摘要 ( )

可视化

The gas chromatographic separations of aromatic compounds using special mixed sta-tionary phases consisting of pp-β-CD+AgNO₃, pp-β-CD+TlNO₃, pp-β-CD+di-n-butly phthalate, pp-β-CD+BPBHpB liquid crystalline, and bentone-34+AgNO₃ were investigated. Besides pp-β-CD+di-n-butyl phthalate, most of the separations deviated from the additivity and a synergistic effect was observed. The separation effects depend on the temperature and how mixing is accom-plished.

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An Enzyme Electrode Based on the Covalently Binding of Horseradish Peroxidase to a Self-assembling Monolayer Modified Gold Electrode

Jian Jun SUN, Jing Juan XU, Hui Qun FANG, Hong Yuan CHEN

中国化学快报. 1998, 9(02): 157-160.

摘要 ( )

可视化

A new procedure for developing high performance enzyme electrode is described. The procedure is based on the covalently binding of horseradish peroxidase to a self-assembling monolayer on a gold electrode. An enhanced catalytic current is observed with addition of hydro-gen peroxide into phosphate buffer solution (PBS) in the presence of mediators. The electrode exhibits high sensitivity and a wide linear range to hydrogen peroxide.

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Surface Modification of Silica Gels as Carrier for Aminoacylase Immobilization

Li Jian LIU, Guo Sheng QIU, Ren Xi ZHUO, Zu Ting PAN

中国化学快报. 1998, 9(02): 161-163.

摘要 ( )

可视化

The surface of silica gels was modified by an diethylamino group and an hydroxy group, simultaneously. The activity of the aminoacylase immobilized on such amino-hydroxy-silica gels was 316.8 U/g. By its catalysis, the conversions of tested N-acetyl-D, L-amino acids to L-amino acids were 85%.

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The Molecular Recognition Characteristics of ω-Mercapto Methoxy Poly (Ethylene Glycol) Self-assembled Monolayer at Gold Electrode and the Detection of Dopamine in Serum

Shi Feng HOU, Ke Shen YANG, Hui Qun FANG, Hong Yuan CHEN

中国化学快报. 1998, 9(02): 165-168.

摘要 ( )

可视化

Self-assembled monolayers (SAMs) of ω-mercapto methoxy poly(ethylene glycol) (MPEG) on gold electrode were used as a means to detect dopamine. Dopamine (DA) had good response at the MPEG film electrode and ascorbic acid (AA) was repelled from the SAMs. The MPEG film is a biocompatible film; there was no adsorption of biosample and no inactivation at electrode surface when it was used to detect DA in biosamples.

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Electrochemical Studies on the Deposition of Neodymium in DMSO

Guan Kun LIU, Li Wen GU, Ye Xiang TONG, Jian Ping LIU, Shi Jun LU

中国化学快报. 1998, 9(02): 169-171.

摘要 ( )

可视化

The electrodeposition of neodymium on Pt and Cu electrodes was investigated in DMSO containing NdCl₃ and a small mount of water at room temperature. Cyclic voltammetry indicated that the reduction process of Nd(Ⅲ) on the Pt cathode was complicated. The one-step reduction wave showed two steps by adding 0.3mol/L ethylenediamine(EN). A delicate yellow, lustrous, strongly adhering film on the Cu electrode was obtained using potentiostatic electrolysis at-1.80 V(vs. aq SCE).

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Comparison of Two Methods in Determining the Composition Distribution of SBS Copolymers

Jian XU, Liang He SHI, Mei Ling YE, Jin Sheng WU, Qing LIU

中国化学快报. 1998, 9(02): 173-175.

摘要 ( )

可视化

The comparison of the determination of chemical composition distributions of butadi-ene-styrene copolymers, obtained by the formula method and experimental method of GPC, is given in this paper. The relative error of average composition was shown to be less than 5%. The formula method was found to be a more convenient and time-saving approach in the characteriza-tion of the copolymer composition distribution.

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Calculation of the Canonical Rate Constant for the Nonadiabatic Trapping Model Based on Unified Statistical Theory:A Test on The Exchange Reaction H₂+H

Shu Xia YIN, Yan WANG, Wen Lin FENG

中国化学快报. 1998, 9(02): 177-179.

摘要 ( )

可视化

A new approach was employed to calculate the canonical (thermal) rate constant based on unified statistical theory. All information for the calculation was obtained from ab initio methods. The flux integral for any point of reaction coordinate was calculated by counting the number of quantum states and applied to determine the dividing surfaces along the intrinsic reaction coor-dinate (IRC). The classical exchange reaction H₂+H, as an example, was investigated. The IRC for the reaction has been traced and detailed information of IRC was carried out at the QCISD/6-311G^** level.The calculated rate constants are well consistent with the experimental results.

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Ab Initio Study of the Reaction:H+SO₂→HO+SO

Rong Shun ZHU, Jian Hua HUANG, Ke Li HAN, Guo Zhong HE

中国化学快报. 1998, 9(02): 181-185.

摘要 ( )

可视化

The reaction of H+S0₂-H0+SO was theoretically investigated sing ab initio MO methods, and HF/TZV(d, p) level of theory was employed to locate stationary points which were then characterized by calculation of the vibrational frequencies. Energies were estimated at the optimized geometries using MP2/TZV(d, p) calculations. The results show that the calculated geometries, frequencies, and thermochemical data were in good agreement with available experi-mental values. The IRC calculations confirmed that nonplanar HS0₂ and HOSO adducts should be more reasonable than those of planar conformation.

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Quantum Chemical Study on the Thermolysis of Dicyanofuroxan

Yong Hong LI, Wen Yuan XU, Yi Yuan PENG, San Guo HONG, Sheng WANG

中国化学快报. 1998, 9(02): 187-189.

摘要 ( )

可视化

AMI and PM3 methods using the unrestricted Hartree-Fock (UHF) calculations have been applied to study the thermolysis of dicyanofuroxan. The results obtained show that the reac-tion proceeds to product through a two-step pathway where the second one is the rate-determining step.

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Pressure Effect on the Local Composition Surrounding Ethyl Acetoacetate in Supercritical CO₂-Ethanol Mixture

Jie LU, Guan Ying YANG, Ling ZHAO, Bu Xing HAN, Hai Ke YAN

中国化学快报. 1998, 9(02): 191-196.

摘要 ( )

可视化

The keto-enol tautomerization of ethyl acetoacetate (EAA) in supercritical C0₂-ethanol mixture has been investigated at 308.15 K and at different pressures using UV-Vis spectroscopy. A method for calculating the local composition about EAA has been developed based on the relationship between the equilibrium constant and dielectric property of the mixing solvent. The results indicate that the local concentration of ethanol surrounding EAA is much higher than that in the bulk.

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A New Method to Investigate the Clustering Phenomena in Supercritical Fluids

Jie LU, Qing HUO, Bu Xing HAN, Hai Ke YAN

中国化学快报. 1998, 9(02): 197-201.

摘要 ( )

可视化

The solvatochromic behavior of acetone in supercritical C0₂ was investigated from 75 bar to 239 bar and at 318.15K. A clustering model is proposed to investigate the formation of sol-ute-solvent and solute-solute clusters, based on the solvatochromic study and some reasonable assumptions. At lower pressures, there were more than one solute molecules in one cluster. At higher pressures, however, each cluster only contained one solute and the clustering of solute-solvent was dominant.

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Prediction of the Atomic Electron Affinities Using a Wavelet Neural Network

Lei LIU, Xue Guang SHAO, Wen Sheng CAI, Yong JIANG, Zhong Xiao PAN

中国化学快报. 1998, 9(02): 203-206.

摘要 ( )

可视化

Wavelet Neural Network (WNN) was employed in a rapid calculation of the atomic electron affinities, with atomic ionization potentials and atomic electron configurations chosen as input parameters. Many unmeasured values were obtained, and the estimates appeared to be suffi-ciently accurate for potential applications.

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Photoinduced Enhancement of Gas Response Behavior of Tetra (heptyloxy) phthalocyanine Thin Film

Xi You LI, Hui Jun XU, Da Peng JIANG, An De LU

中国化学快报. 1998, 9(02): 207-209.

摘要 ( )

可视化

The response of a spin coated phthalocyanine film to lppm N0₂ can be increased sig-nificantly by light. This may be ascribed to the irritation of phthalocyanine molecules. This irrita-tion decreased the energy changes of the electron transfer between N0₂ and phthalocyanine.

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Synthesis and Electrochemical Properties of a New Tetraazamacrocyclic Complex of Silver (Ⅰ)

Fu Xin XIE, Xu Feng YU, Hao ZHANG, Liang ZHAO, Yu Peng TIAN, Shi Sheng NI

中国化学快报. 1998, 9(02): 211-213.

摘要 ( )

可视化

A novel silver (Ⅱ) complex AgL(C10₄)₂ containing a tetraazamacrocyclic ligand has been synthesized. Its electrochemical behavior was studied by cyclic voltammetry.

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New Complex Nonlinear optical Crystal-Bis (4-methoxybenzaldehyde thiosemicarbazone) Zinc Chloride (ZnL₂Cl₂)

Yu Peng TIAN, Jie Ying WU, Fu Xin XIE, Shi Sheng NI

中国化学快报. 1998, 9(02): 215-217.

摘要 ( )

可视化

The structure of ZnL₂Cl₂(L=4-methoxybenzaldehyde thiosemicarbazone) has been obtained by x-ray diffraction. The compound crystallized in space group Cc with Z=4, in a unit cell of dimensions, a=9.08909(10), b=22.1420(10), c=11.7890(10)Å; β=90.050(10)°, v=2374.6(12)Å³, Dc=1.552gcm^-3. μ=1.463mm^-1, R=0.0338, and Rw=0.0418. The structure contains individual ZnL₂Cl₂ distorted tetrahedral units in which L molecules are S-bonded as monodentate to the metal ions; chloride ions are also coordinated. The nonlinear optical properties of the zinc complex are also presented in this letter.

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Synthesis and Structure of the Complexes of 2-Alkoxycarbonylalkyltin Trichlorides with 2-Salicylideneaminophenol

Lai Jin TIAN, Bin ZHAO, Zheng Yu ZHOU, Ping YANG, Wen Tao YU

中国化学快报. 1998, 9(02): 219-221.

摘要 ( )

可视化

The complexes of 2-Alkoxycarbonylalkyltin Trichlorides with 2-Salicylideneamino-phenol have been synthesized and characterized by means of elemental analysis, IR, ¹H-NMR and X-ray single crystal diffraction. The structural features of the complexes are described.

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A Novel Humidity-Sensitive Material Based on PDEB with Nickel Complex Catalyst

Mu Jie YANG, Yang LI, Xiao Wei ZHAN, Hong Mei SUN, Ming Fang LING, Yun Hai ZHU

中国化学快报. 1998, 9(02): 223-225.

摘要 ( )

可视化

Poly(p-diethynylbenzene) (PDEB) with improved solubility was synthesized using a novel catalyst bis(triphenylphosphine)bis(p-diethynylbenzene) nickel complex (Ni-C). A surface acoustic wave (SAW) delay line oscillator was covered by Langmuir-Blodgett (LB) films of re-sulting PDEB to prepare a humidity sensor, which was found to have high sensitivity and good repeatability. PDEB shows promise as a good humidity-sensitive material.

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1998年, 第9卷, 第02期　刊出日期：1998-02-20

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1998年, 第9卷, 第02期 刊出日期：1998-02-20

1998年, 第9卷, 第02期　刊出日期：1998-02-20