中国化学快报

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Synthesis of 4'-Methoxy Flavone

Lei ZOU, Xiao Juan YE, Yuan Lian LIU, Zhen Bai CAO

中国化学快报. 2000, 11(07): 567-570.

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Synthesis of 4'-methoxyflavone, first by the reaction of 4-methoxy acetophenone enamine with heptanedioyl chloride, then by dehydrogenation, is described.

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Stereoselective Synthesis of (Z)-2-Acylamido-4-phenylcrotonates

Yi Nong XIE, Fan Min FU, Ai Qiao MI, Yao Zhong JIANG

中国化学快报. 2000, 11(07): 567-570.

摘要 ( )

可视化

Two practical methods for highly stereoselective synthesis of (Z)-2-acylamido-4-phenylcrotonates 2a~b have been developed. The key step in the first route was how to control the acid-catalyzed isomerization of condensation mixtures of α-keto ester 5 with carbomite. In the second route the key step was reduction of oxime 8, derived from α-keto ester 5, with iron powder in the presence of acetic anhydride.

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Synthesis of Novel Non-Nucleoside HIV-1 Reverse Transcriptase Inhibitors-1-(3-Phthalimido-2-oxobutyl)-4-Substituted-phenylpiperazines

Xin CHEN, Lin WANG, Zhi Zhong ZHAO, Xing Quan ZHANG, Xiang Hong CHEN, Hong Shan CHEN

中国化学快报. 2000, 11(07): 571-572.

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可视化

We have designed and synthesized a series of new phthalimidopiperazines, biological activity test show that the target compounds(Ic, Ie, Ii) can inhibit HIV-1 RT with IC₅₀ 20.0, 43.8, and 63.7 μM, respectively.

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The Synthesis of a New Macrocyclic Dinucleating Ligand,3,6,9,17,20, 23-Hexaaza-29,30-Dihydroxy-13,27-Dimethyl-Tricyclo[23,3,1,1^11,15]Triaconta-1(28),11,13, 15(30),25,26-Hexaene

Guo Qiang SHANGGUAN, Arthur E. MARTELL, Zhong Ren ZHANG

中国化学快报. 2000, 11(07): 573-576.

摘要 ( )

可视化

A new dinucleating 24-membered hexaazadiphenol macrocyclic ligand, 3,6,9,17,20, 23-hexaaza-29,30-dihydroxy-13,27-dimethyl-tricyclo[23, 3, 1, 1^{11, 15}] triaconta-1(28), 11,13, 15(30),25, 26-hexaene, BDBPH, was synthesized by the NaBH₄ reduction of the Schiff-base obtained from the[2+2] condensation between diethylenetriamine and diformyl-p-cresol. The structure was characterized by elemental analysis, ¹HNMR and FAB-MS. The synthetic method was also discussed.

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Synthesis of Novel Lipids Bearing Cholesteryl Group as Gene Vectors

Man Zhou ZHU, Qi Hua WU, Jian Ning WEI, Xiao Qi ZHENG, Qing Xiang GUO

中国化学快报. 2000, 11(07): 577-580.

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可视化

Some cationic and neutral lipids bearing cholesteryl group were synthesized as gene vectors, and the structures of the compounds were characterized by IR, ¹HNMR, MS and elemental analysis.

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Synthesis and Biological Activity of N-[N'-(4,5,6-Trisubstitued pyrimidin-2-yl)acetylureido] Benzoic Sulfimide Derivatives

Tao WANG, Si Jia XUE, Hai Jian YANG

中国化学快报. 2000, 11(07): 581-582.

摘要 ( )

可视化

Fourteen N'-(4,5,6-Trisubstitued pyrimidin-2-yl)-2-chloroacetylureas and fourteen N-[N'-(4,5,6-trisubstitued pyrimidin-2-yl) acetylureido] benzoic sulfimide derivatives were synthesized. Among them twenty-seven are new compounds and their structures have been confirmed by ¹HNMR, IR, MS and elemental analysis. The preliminary biological tests showed that some of the target compounds have excellent inhibitory activities against barnyard grass and rape, and the others have a good regulating activity for plant growth.

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Synthesis and Characterizations of New Ferrocenyl Schiff Base with NLO Responses

Bang Jing LI, Wan Yi LIU, Tong XIE, Guo Sheng HUANG, Yong Xiang MA

中国化学快报. 2000, 11(07): 583-586.

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可视化

A series of new stable (thermal and photochemical) ferrocenyl derivatives containing C=N bond and benzene ring in long conjugated chains have been synthesized and characterized by ¹HNMR(400MHz), IR, and elemental analysis. Pull-push ferrocenyl complexes that we have prepared have strong NLO responses identified by electronic absorption spectrum.

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Asymmetric Catalytic Hydrogenation Using Rhodium Diphosphinites Derived From D-glucose and D-mannitol

Peng JIANG, Shi Jie LU

中国化学快报. 2000, 11(07): 587-588.

摘要 ( )

可视化

Three diphosphinites were synthesized for preparing rhodium-diphosphinite complexes. The complexes were used for asymmetric catalytic hydrogenation of amino acid precursor α-acetamidocinnamic acid and its methyl ester. With all complexes, D-amino acid is the most abundant product.

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Catalytic Formation of Propylene Carbonate from Supercritical Carbon Dioxide/Propylene Oxide Mixture

Xiao Bing LU, Yu Zhen PAN, Dong Feng JI, Ren HE

中国化学快报. 2000, 11(07): 589-592.

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可视化

Propylene carbonate was synthesized from supercritical carbon dioxide (SC-CO₂)/propylene oxide mixture with phthalocyaninatoaluminium chloride (ClAlPc)/tetrabutylammon-ium bromide (n-Bu₄NBr) as catalyst. The high rate of reaction was attributed to rapid diffusion and the high miscibility of propylene oxide in SC-CO₂ under employed conditions. Various reaction periods present different formation rate of propylene carbonate, mainly due to the existence of phase change during the reaction. The experimental results demonstrate that SC-CO₂ could be used as not only an environmentally benign solvent but also a carbon precursor in synthesis.

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A New Cyclopeptide from Polycarpon prostratum

Zhong Tao DING, Jun ZHOU, Yong Xian CHENG, Ning Hua TAN

中国化学快报. 2000, 11(07): 593-594.

摘要 ( )

可视化

A new cyclic peptide named polycarponin A, was isolated from the whole plants of Polycarpon prostratum. Its structure was determined by detailed spectroscopic analysis.

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A New Cyclopeptide from Brachystemma calycinum

Yong Xian CHENG, Jun ZHOU, Ning Hua TAN, Zhong Tao DING

中国化学快报. 2000, 11(07): 595-596.

摘要 ( )

可视化

A new cyclopeptide, brachystemin A, has been isolated from the roots of Brachystemma calycinum. The structure was elucidated by spectral methods.

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The Study of Anti-tumor Activity of Trichosanthin by Cyclic Voltammogram

Gang XU, Cheng Cai AN, Jun FENG, Yun Xiang CI, Jin Hua TIAN, Zhang Liang CHENI

中国化学快报. 2000, 11(07): 597-600.

摘要 ( )

可视化

The anti-tumor activity of Trichosanthin (TCS) has been frequently reported in recent years. In our experiments, electrochemical methods were applied to detect the effects of TCS on human leukemia cells U937. 50μg/ml TCS treatment for 40 hours can cause irreversible negative effects on the viability of U937 cells. This effect largely depends on the concentration of TCS and the time period of treatment.

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Electrochemical Behavior of Adriamycin at Ni/GC Ion Implantation Modified Electrode

Jing Bo HU, Qi Long LI

中国化学快报. 2000, 11(07): 601-602.

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可视化

With a Ni/GC ion implantation modified electrode as working electrode, in 0.1 mol/L HOAc-NaOAc (pH=4.62) solution, a sensitive reductive wave of ADM was obtained by linear sweep voltammetry. The peak potential was-0.55 V (vs.SCE). The peak current is proportional to the concentration of ADM with a detection limit of 6.9×10^-8 mol/L. The behavior of the reduction wave was studied. The experiments of AES and XPS showed that Ni was surely implanted into the surface of the GCE and the implanted Ni at the GCE improved the electrocatalytic activity.

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Nested Genetic Algorithm for Resolving Overlapped Spectral Bands

Xiu Qi ZHANG, Yun Hui ZENG, Jian Bin ZHENG, Hong GAO

中国化学快报. 2000, 11(07): 603-604.

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可视化

A nested genetic algorithm, including genetic parameter level and genetic implemented level for peak parameters, was proposed and applied for resolving overlapped spectral bands. By the genetic parameter level, parameters of genetic algorithm were optimized; moreover, the number of overlapped peaks was determined simultaneously. Then parameters of individual peaks were computed with the genetic implemented level.

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Determination of Neurotoxin β-ODAP and Non-protein Amino Acids in Lathyrus Sativus by High-Performance Liquid Chromatography with Precolumn Derivatization with 6-Amino quinolyl-N-hydroxysuccinimidyl Carbamate (AQC)

Fei WANG, Xiong CHEN, Qian CHEN, Xing Chen QIN, Zhi Xiao LI

中国化学快报. 2000, 11(07): 605-608.

摘要 ( )

可视化

A new method was developed for the quantitative determination of the neurotoxic non-protein amino acid, 3-N-oxalyl-L-2,3-diaminopropionic acid (β-ODAP), its nontoxic α-isomer and other non-protein amino acids in the plant samples of Lathyrus sativus after derivatization with 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate (AQC) by reversed-phase high-performance liquid chromatography (HPLC). 2-Amino butyric acid (ABA) was used as an internal standard. The RP HPLC detection limit for both isomers is 1.8 ng with good response linearity. The results are compared with a colorimetric method.

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Study on New Sensitive Method of Determination of Phosphorus by Solid Phase Spectrophotometry

Yue Qin XEI, Shao Min LIU, Hong Wu TONG, Ya DAI

中国化学快报. 2000, 11(07): 609-612.

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可视化

The use of solid phase spectrophotometry for the determination of trace phosphorus in the system of phosphomolybdate-fructose is described. The adsorption of the system on anion-exchange resin is reported.

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Simultaneous Determination of Fluorescein, Rhodamine 6G and Rhodamine B in Turbid Solution by Polarization Variable-Angle Synchronous Fluorescence Spectrometry

Yao Qun LI, Fang QIAN, Xian Zhi HUANG

中国化学快报. 2000, 11(07): 613-614.

摘要 ( )

可视化

Polarization variable-angle synchronous fluorescence spectrometry was proposed to determine samples in turbid solution. A mixture of fluorescein, rhodamine 6G and rhodamine B was used to evaluate the technique. The background caused by scattering light was decreased remarkably. The limits of detection were 0.6 ng/ml for fluorescein, 2.3 ng/ml for rhodamine 6G and 4.1 ng/ml for rhodamine B, respectively.

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The Investigation of Oscillographic Chronopotentiometry at Silver Disk Electrode and Its Mechanism

She Ying DONG, Ke Qi YU, Hong Sheng TANG, Hong GAO

中国化学快报. 2000, 11(07): 615-616.

摘要 ( )

可视化

A new method of oscillographic chronopotentiometry at silver disk electrode was investigated.By using it, a series of ions such as Pb, In, Cr, Tl, Bi etc. were determined. The detection limits are two or three orders of magnitude lower than those by oscillographic chronopotentiometry at mercury electrode. The proposed method is characterized by fine sensitivity、stable oscillogram and no mercury. The research on the mechanism of this method shows that these achievements are caused by the characterristics of silver electroxidation and electroreduction and the oscillographic chronopotentiometry (OC).

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In-situ pH Measurement at the Electrode/Solution Interface

Jian Min ZHANG, Qiu Zhi SHI, Chang Chun YANG, Quan Feng DONG

中国化学快报. 2000, 11(07): 617-620.

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In this paper a pH microprobe technique was developed to measure in-situ the pH value at the electrode/solution interface. Iridium oxide was used as a pH sensitive material with good response behavior in the measured solutions. The experimental results indicated that the interfacial pH increased with the applied potential, first jumped to a maximum, then slowly decreased at the controlled potential during the electrodeposition process of functional ceramics.

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Electrochemical Oscillations during Cathodic Polarization Process of Aluminum Covered with Talc Coating

Hong Bo DING, Zhong Xiao PAN, Fu Yang ZHENG, Guo Mou WEN, Renato SEEBER

中国化学快报. 2000, 11(07): 621-622.

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可视化

Talc coatings were produced with chemical method on the surface of pure aluminum. The characteristics of cathodic polarization in a 3.5% NaCl solution have been studied through the observation of the ‘current oscillations’ phenomenon.

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The Grand Canonical Monte Carlo Simulations of Benzene and Propylene in ITQ-1 Zeolite

Li Li ZHU, Ting Jun HOU, Xiao Jie XU

中国化学快报. 2000, 11(07): 623-626.

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Grand Canonical Monte Carlo (GCMC) simulations have been performed to study the localization and adsorption behavior of benzene and propylene, in purely siliceous MWW zeolite (ITQ-1). By analyzing the locations of benzene and propylene in ITQ-1, it can be deduced that the alkylation of benzene and propylene will mainly happen in 12-MR supercages at the external surface or close to the external surface. The adsorption isotherms of benzene and propylene at 315K and 0~3.5kPa are predicted, and the results for benzene generally coincide with the trend from the experiments of a series of aromatic compounds.

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Self-Organization of PbS into Quantum Dots Superlattices

Lian Zeng YAO, Chang Hui YE, Chi Mei MO, Ye ZHANG, Li De ZHANG

中国化学快报. 2000, 11(07): 627-630.

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Self-organization of PbS into quantum dots superlattices is demonstrated for the first time, and hexaplanar colloidal crystals 1-10μm in size made from PbS quantum dots 4nm in diameter are shown in Transmission Electron Microscope (TEM) micrograph, and the inner structures of the superlattices can be seen from the High Resolution Transmission Electron Microscope (HRTEM).

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Syngas Production Using an Oxygen-Permeating Membrane Reactor with Cofeed of Methane and Carbon Dioxide

Zong Ping SHAO, Hui DONG, Guo Xing XIONG, Wei Shen YANG

中国化学快报. 2000, 11(07): 631-634.

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CH₄-CO₂-O₂ reforming to syngas in a novel Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3-δ oxygen-permeable membrane reactor using LiLaNiO/γ-Al₂O₃ as catalyst was successfully reported. Excellent reaction performance was achieved with around 92% methane conversion efficiency, 95% CO₂ conversion rate, and nearly 8.5mL/min·cm² oxygen permeation flux. In contrast to the oxygen permeation model with the presence of large concentration of CO₂ (under such condition the oxygen permeation flux deteriorates with time), the oxygen permeation flux is really stable under the CH₄-CO₂-O₂ reforming condition.

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Red Mechanoluminescence and Photoluminescence from Novel Europium Complexes

Wei Guo ZHU, Tong Suo YUAN, Xiao Qiang WEI, Zhi Yun LU, Yan HUANG, Yu LIU, Qiang PENG, Ming Gui XIE

中国化学快报. 2000, 11(07): 635-638.

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Two new binuclear (europium and lanthanum) β-diketone complexes Eu_0.9La_0.1(TTA)₃Phen and Eu_0.5La_0.5(TTA)₃Phen in which Phen is 1,10-phenanthroline, TTA is an anion of thenoyltrifluoroacetone (HTTA) were synthesized for the first time. They showed intense photoluminescence (PL) and mechanoluminescence (ML), and had their maximum PL and ML spectra peaked at 613.5 nm with half bandwidth of 10 nm respectively. Their PL and ML intensity were obviously stronger than these from Eu(TTA)₃Phen. It is considered that binuclear (europium and lanthanum) β-diketones complexes are promising ML and PL materials.

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Synthesis and Structural Characterization of Adduct Cu₂(phen)₂·3(FCA)·(ClO₄)·2H₂O

Jia Xiang YANG, YU Peng TIAN, Qing Liang LIU, Yong Shu XIE, Hoong Kun FUN

中国化学快报. 2000, 11(07): 639-640.

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可视化

A new dinuclear copper (Ⅱ) complex containing 3-ferrocenyl-2-crotomic acid salt (FCA) and phen has been synthesized. Its structure was characterized by X-ray crystal analysis. The molecular is a pentametallic compound.

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A Sterically Hindered Zirconocene Complex (1,2-Ph₂C₅H₃)₂ZrCl₂:Synthesis, Structure and Properties as Olefin Polymerization Catalyst

Fan ZHANG, Ying MU, Yue Tao ZHANG, Cong Xi CHEN, Hui Min ZHAI, Han HONG

中国化学快报. 2000, 11(07): 641-644.

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可视化

An unbridged zirconocene complex bis(1,2-diphenylcyclopentadienyl)zirconium dichloride[(1,2-Ph₂-C₅H₃)₂ZrCl₂] 1 has been synthesized and structurally characterized. When activated by MAO, 1 produces ultra-high molecular weight polyethylene with high melting transition temperature, as well as atactic oligopropylene with average molecular weight of ~1150 g mol^-1.

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Structure of the Manganese (V) Complex-Mn·3/2(μ-DHBQ)·4H₂O·2Cl

Yi Xiang CHENG, Mao Lin HU, Ji Xin YUAN, Yun Chu WANG

中国化学快报. 2000, 11(07): 645-648.

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可视化

The novel complex of Mn(V):Mn·3/2(μ-DHBQ)·4H₂O·2Cl (where, H₂DHBQ=2,5-dihydroxyl-1,4-benzoquinone) was synthesized and its crystal structure has been determined by X-ray diffraction. The complex belongs to trigonal system with space group P3(#147), a=1.415(2) nm, c=0.6552(4) nm, V=1.1371(7) nm^-3, Z=2, Dx=1.183 g/cm³, μ=7.37 cm^-1, F(000)=408.00, R=0.041, Rw=0.046.

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Modifying NaY Zeolite with Metal Oxide by Microwave Irradiation:Influence on the Adsorption and Decomposition of N-nitrosamines

Li Li MA, Bin SHEN, Jian Hua ZHU, Jia Rong XIA, Qin Hua XU

中国化学快报. 2000, 11(07): 649-652.

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可视化

Coating MgO or ZrO₂ on zeolite NaY accelerated decomposition of N-nitrosodimethylamine and N-nitrosopyrrolidine, resulting from variation of the surface state such as generation of basic sites.

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Solid-Liquid Extraction of Some Lanthanide Complexes with 1-Nitroso-2-Naphthol

Jin Zhang GAO, Xiao Jun GUO, Bi WANG, Qi Liang DENG, Hai Yan FAN

中国化学快报. 2000, 11(07): 653-654.

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可视化

The extraction behavior of Sm(Ⅲ), Eu(Ⅲ),Er(Ⅲ) and Yb(Ⅲ) with 1-nitroso-2-naphthol (HA) in paraffin has been studied. The composition of extracted complexes has been determined to be LnA3 by slope analysis method. The effect of temperature on extraction system is also investigated and thermodynamic parameters are obtained.

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Investigation of the Buffering Function of Aluminum being in Equilibrium with the Mineral Kaolinite in Acidic Natural Water

Feng LIU, Shu Ping BI, Ning GAN

中国化学快报. 2000, 11(07): 655-658.

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可视化

This paper presents a computer model to investigate the buffering function of aluminum being in equilibrium with mineral kaolinite in acidic natural water. Factors affecting the theoretical pH values are discussed. The model is verified by analyzing practical water samples.

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本期目录

2000年, 第11卷, 第07期　刊出日期：2000-07-20

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本期目录

2000年, 第11卷, 第07期 刊出日期：2000-07-20

2000年, 第11卷, 第07期　刊出日期：2000-07-20