中国化学快报

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SYNTHESIS OF 4-S-(5"-ALKYL-4"-AMINO-1",2",4"-TRIAZOLE-3"-YL)-4-DEOXY-4'-DEMETHYL-EPIPODOPHYLLOTOXIN ANALOGUES

Kuan Ke LU, Fang Min LIU, Yao Zu CHEN

中国化学快报. 1995, 6(05): 361-362.

摘要 ( )

可视化

Seven title compounds were synthesized by condensation of 4'-demethylepipodophyllotoxin with 5-alkyl-4-amino-3-mercapto-l,2,4-trizoles in the presence of CF₃COOH (TFA).

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STUDY ON THE SYNTHESIS OF 1,3,4,6-TETRATHIAPENTALENE-2,5-DIONE (THIAPENDIONE)

Sheng Gao LIU, Pei Ji WU, Yun Qi LIU, Dao Ben ZHU

中国化学快报. 1995, 6(05): 365-367.

摘要 ( )

可视化

Synthesis of l,3,4,6-tetrathiapentalene-2,5-dione(thiapendione) has been studied in detail and a convenient synthetic procedure is reported.

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STUDIES ON THE PRENYLFLAVONOIDS PART Ⅹ Ⅳ SYNTHESIS OF 3'-METHOXY-5'-PRENYLNARINGENIN

Lian Yun ZHAO, Xian Yong BU, Yu Lin LI

中国化学快报. 1995, 6(05): 367-368.

摘要 ( )

可视化

3'-Methoxy-5'-prenylnaringenin was first synthesized via the condensation of 2-hydroxy-4,6-dirnethoxymethoxyacetophenone with 3-methoxy-4-methoxymethoxy-5-prenylbenzaldehyde followed by cyclization and demethoxymethylation.

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SYNTHESIS AND CHARACTER OF NEW SWEET DIPEPTIDE ESTERS

Zhuan Fang YUAN, Tong Sheng ZHU, Jing Yu LAI

中国化学快报. 1995, 6(05): 369-372.

摘要 ( )

可视化

Two new dipeptide sweeteners 3a,3b have been prepared from the commercial starting material in three steps with the sweetness over 100 and 200 times of that of sucrose,respectively.The two compounds appear to have sucrose-like taste and high stability.

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SYNTHESES OF NEW NITROGEN-OXYGEN DONOR MACROCYCLES

Bin ZHAO, Yang Jie WU, Jing Chao TAO, Han Zhen YUAN

中国化学快报. 1995, 6(05): 373-376.

摘要 ( )

可视化

Twelve new nitrogen-oxygen donor macrocycles have been synthesized by condensation of N,N-bis [2-(2-formylphenoxy) ethyl]-4-methylphenylsulfonamide with diamines followed by a one pot reduction of the corresponding Schiff-base derivatives.The 4-methylphenylsulfonyl group can be removed by Na-Hg (6%) in methanol.All of the new aza-crowns were identified by EA,NMR,IR and MS.

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STUDIES ON THE MAGNETIC RESONANCE CONTRAST AGENTS:SYNTHESIS AND SPIN-LATTICE RELAXIVITY OF AMINO ACIDS AND OLIGOPEPTIDYL DERIVATIVES OF GD-DTPA

Yi LUO, Ren Xi ZHUO, Chang Lie FA

中国化学快报. 1995, 6(05): 377-378.

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A series of amino acids and oligopeptidyl derivatives of Gd-DTPA were synthesized.The structure of these chelates were confirmed by IR and elementary analysis.Toxicity of chelates was almost the same as Gd-DTPA.The spin-lattice relaxivity (R₁) of these chelates were a little bit larger than that of Gd-DTPA.

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A NEW KIND OF MANGANESE (Ⅱ) PORPHYRIN COMPLEX TERT-BUTYLAMINE AS AXIAL LIGAND

Lin Jing MU, Jie Sheng HUANG, Yong Qia ZHOU, Pan Wen SHEN

中国化学快报. 1995, 6(05): 379-382.

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可视化

A series of para-substituted meso-tetraphenylporphinatomanganese (Ⅱ) complexes,Mn^■ (T(p-X)PP) (L),where X=H,CH₃,Cl,OCH₃,containing a new kind of axial ligand L=t-RuNH₂ have been synthesized by the NaRH₄ reduction method.These compounds were characterized by electronic and infrared spectra.

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RESOLUTION OF DL-α-AMINO ACIDS ON A L-HYDROXY PROLINE CHIRAL PHASE BY LIGAND-EXCHANGE CHROMATOGRAPHY

Tao CHEN, Tian Bao HUANG

中国化学快报. 1995, 6(05): 383-384.

摘要 ( )

可视化

A HPLC bonded phase with L-hydroxy proline was prepared by coupling L-hydroxy proline as a chiral selector to silica gel via 3-glycidyloxypropyltrimethoxysilane.The chiral separations of 12 DL-amino acids on the chiral phase were performed and the effects of the chromatographic conditions,the pH of the mobile phase and the column temperature,on the resolution of DL-α-amino acids were studied.

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EVIDENCE FOR AROMATIC sp² C-H…O=C INTRAMOLECULAR INTERACTION IN PYRIDINO AND BENZOBENZANTHRONE SKELETONS

Zeper ABLIZ, Hiroshi MORIYAMA, Junji AOKI, Toyotoshi UEDA

中国化学快报. 1995, 6(05): 385-398.

摘要 ( )

可视化

The evidence for the sp² C-H…O=C intramolecular interaction like hydrogen bond observed from the ¹H NMR signal shifted extremely to down field (δ=10.23 ppm) at the bay area of phenaleno[2,3-f] quinolin-13-one has been confirmed by EIMS and MS/MS(CAD) spectroscopy and IR spectroscopy,as well as MNDO-PM3 calculations.

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A NEW BICOUMARIN FROM PLEUROSPERMUM RIVULORUM (DIELS)

Yong Qing XIAO, Xiao Hong LIU, Kimiye BABA, Masahiko TANIGUCHI

中国化学快报. 1995, 6(05): 385-386.

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可视化

From the BtOAc extract of the underground parts of Pleurospermum rivulorum (Diels),a new bicoumarin,rivulobirin was isolated along with eight known furocoumarins.

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SIX SINAPYL ALCOHOL DERIVATIVES FROM LIGULARIA NELUMBIFOLIA

Yu ZHAO, Hai Ruo PENG, Zhong Jian JIA

中国化学快报. 1995, 6(05): 387-390.

摘要 ( )

可视化

Further phytochemical investigation of the roots of Ligularia nelumbifolia afforded six new sinapyl alcohol derivatives.Their structures were elucidated by high field NMR spectroscopy.

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STRUCTURE ELUCIDATION OF LIGUSTILONE FROM LIGUSTICUM SINENSIS OLIV⁽¹⁾

De Quan YU, Ruo Yun CHEN, Feng Zhi XIE

中国化学快报. 1995, 6(05): 391-394.

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可视化

A new sesquiterpenoid compound named ligustilone was isolated from the roots of Ligusticum sinense Oliv.Based on the chemical and spectral studies especially 2DNMR including ¹H,¹H COSY,¹H,¹³C COSY and COLOC techniques,its structure has been established as a bisabolane derivative and showed as I.The absolute configuration was determined by CD data.

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XENOBIOTICALLY MODIFIED HUMAN HEMOGLOBIN STUDIED BY ELECTROSPRAY MASS SPECTROMETRY

Xiao Bai XU, Surinder KAUR, David MALTBY, Alma BURLINGAME

中国化学快报. 1995, 6(05): 399-402.

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可视化

High performance liquid chromatography (HPLC)/electrospray mass spectrometry (ES MS) has been used to measure successfully the molecular weights of intact α and β chains of globin covaleutly modified with styrene oxide,having the molecular weight of xenobiotic moiety as 120 Da.The method also has revealed a variety of modified residues in the reacted hemoglobin after digestion with trypsin.

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THERMAL DECOMPOSITION PROCESSES OF POLYANILINE AND POLY-O-TOLUIDINE INVESTIGATED BY DIRECT PYROLYSIS MASS SPECTROMETRY

Hong Wei XIE, Shu Ying LIU, Li Xiang WANG, Yie Qian SHUN

中国化学快报. 1995, 6(05): 403-406.

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可视化

The thermal decomposition of polyaniline (PAn) and poly-o-toluidine (POT) was studied by means of direct pyrolysis mass spectrometry (DPMS) and MS/MS.The results showed that both benzene-diamine and quinone-diimine units were produced,and the intensities of fragments corresponding to quinone-diimine units increased as the oxidation degrees increased.The mechanism of thermal decomposition of PAn and POT was given for the first time.

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STUDY ON FINITE ELEMENT METHOD APPLIED TO HARTREE-FOCK-SLATER CALCULATIONS FOR LINEAR MOLECULES

Fei Wu CHEN, Zhi Da CHEN, Le Min LI, Zhi Pin LIU, Zhen Xuan LIANG

中国化学快报. 1995, 6(05): 407-410.

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可视化

An efficient finite element method with a new type of trial function applied to Hartree-Fock-Stater calculations for molecular system is presented.The advantage of using new trial functions is that they are able to describe the cusplike behavior of molecular orbitals near location of atomic nuclei.The results calculated on the H₂⁺ and H₂ systems show that our approach is more practical and efficient than the traditional finite element method.

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AN AB INITIO SORBIE-MURREL POTENTIAL ENERGY SURFACE OF CARBON DISULFIDE

Yu Bin WANG, Xin Ji HONG, Zhen Yi WEN

中国化学快报. 1995, 6(05): 411-414.

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In this letter ab initio electronic structure calculations are performed for extensive geometries of CS₂.A newly written program is used to fit the computed energies into the Sorbie-Murrel function,whose contour plots are illustrated.

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CYCLIC VOLTAMMETRIC INVESTIGATION OF THE MICELLAR PHASE OF SODIUM DODECYL SULFATE IN AQUEOUS SOLUTIONS

Chun Sheng MO, Zhen Zhong HUANG, Ming Hua ZHONG

中国化学快报. 1995, 6(05): 415-418.

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可视化

Cyclic voltammetric measurements were made on sodium dodecyl sulfate (SDS) in aqueous solutions using K₄Fe (CN)₅ as the electroactive probe and H₂SO₄ as the supporting electrolyte.Using extrapolation,we estimated the diffusion coefficient D_m,hydrodynamic radius R_m,aggregation number n,and the molecular weight of SDS micelles in aqueous solutions at various surfactant concentrations.The partition coefficients,K_D,of the electroactive probe between micelle and water continuous phase were also estimated.

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STUDY ON A NEW COMB POLYMER ELECTROLYTE (Ⅲ)

Li Ming DING, Yun Qing LIN, Xiao Guang SUN, De Zhu MA, Cheng Zong YANG

中国化学快报. 1995, 6(05): 419-420.

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可视化

A new solid polymer electrolyte has been prepared using NaClO₄ and a comb-branch polymer with oligo (ethylene oxide) side chains.The thermal and ionic conductive properties of the electrolytes were investigated.The profile of conductivity at various temperatures follows the VTF plots.

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A CRYO-HYDROGEL IMMOBILIZED PROTEIN ELECTRODE FOR DIRECT ELECTRON TRANSFER OF MYOGLOBIN

Jian Jun NIU, Yi Zhu GUO, Shao Jun DONG

中国化学快报. 1995, 6(05): 421-424.

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可视化

The direct electron transfer process of horse heart myoglobin,which was immobilized into a new type of cryo-hydrogel membrane ou a glassy carbon electrode surface,was studied and the characteristics of this cryo-hydrogel immobilized protein electrode were discussed.

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THIN FILM ELECTRODES OF AMORPHOUS Ml-Ni ALLOY AS HYDROGEN CATHODES IN ALKALINE SOLUTION

Wei Kang HU, Yun Shi ZHANG, Yun WANG

中国化学快报. 1995, 6(05): 425-428.

摘要 ( )

可视化

Thin film electrodes of amorphous Ml-Ni (Ml=Mischmetal)alloy prepared by ion beam sputtering were investigated as cathodes for hydrogen evolution reaction in alkaline solution.The results show that the film cathodes of amorphous Ml-Ni alloy have good catalytic activity and excellent resistance to hydrogen embrittlement.

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PHOTOCONDUCTIVITY OF ZINC PHTHALOCYANINE BY C₆₀ DOPING

Wan Xi CHEN, Zhu De XU, Wen Zhu LI

中国化学快报. 1995, 6(05): 429-432.

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可视化

The influence of the dopant C₆₀ on photoconductivity of zinc phthalocyanine (ZnPc) was examined.The results show that C₆₀ doping can remarkably enhance the photoconductivity compared with the corresponding pure materials.The X-ray powder diffraction pattern and IR spectrum suggest that the enhancement of photoconductivity may be due to the polymorphic transformation and the change of molecular interaction in phthalocyanine composites,and a chargetransfer complex (CTC) of ZnPc with C₆₀ may be formed.

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A NEW METHOD OF JUDGING THE PHOTOSENSITIVITY OF WATER-SOLUBLE PORPHYRINS IN THE PHOTOSENSITIVE SYSTEM

Guo Yu YANG, Qing Min WANG, Jie ZHANG, Lian Xiang YU, Xi Zhang CAO

中国化学快报. 1995, 6(05): 433-436.

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可视化

The electron transfer between triethanolamine (TEOA) and methylviologen (MV²⁺) was photosensitized by water-soluble meeo-tetrakis (4-dimethylsulfonatopylanilino)porphyrins and meso-tetrakis (4-trimethylanilino) porphyrins excited in their triplet state by visible light in DMSO solution containing 20% V/V water at room temperature.The kinetic parameter A,photo-inductive time t_i and initial reaction rate V_o are applied to measuring the photosensitivity of photosensitizers.

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TERNARY COMPLEXES OF Cu (ATP) AND NUCLEIC ACID BASEADENINE AND GUANINE STABILITY CONSTANTS AND STACKING EFFECT

Fu Hai WU, Xue Yi LE, Fen Yun SONG, Bin SONG, Liang Nian JI

中国化学快报. 1995, 6(05): 437-440.

摘要 ( )

可视化

The stability constants of the binary complexes of Cu²⁺ with adenine and guanine as well as the ternary complexes of Cu (ATP) with the same ligands have been measured in aqueous solution spectrophotometrically and a strong stacking interaction between the heteroaromatic ring of the ligands and the purine moiety of ATP has been found.This stacking interaction may be one of the factors affecting the stability of the nucleic acid helices.

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FISCHER-TROPSCH SYNTHESIS OVER ZrO₂-SUPPORTED Ru-FeBIMETALLIC AND THEIR MONOMETALLIC CLUSTERS

Zhong Ru GUO, Hui Zhen XU

中国化学快报. 1995, 6(05): 441-442.

摘要 ( )

可视化

ZrO₂-supported Ru-Fe bimetallic clusters derived from Ru₂ Fe (CO)₁₂or RuFe₂ (CO)₁₂ displayed much higher activities in the hydrogenation of CO than that of mixed metal clusters or their monometallic clusters derived from Ru₃ (CO)₁₂ and Fe₂(CO)₉ and that of conventional catalysts prepared from RuCl₃ and Fe(NO₃)₃.

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STUDIES ON 12-MOLYBDOVANADOPHOSPHORIC ACIDS APPLIED TO THE SELECTIVE OXIDATION OF ACROLEIN

Zhi Dong ZHU, Yuan Zhi XU, Zhu De XU, Duan Jun XU, De Yu CHEN

中国化学快报. 1995, 6(05): 443-446.

摘要 ( )

可视化

Titled catalysts applied to the selective oxidation of acrolein are characterized before and after the catalytic test by electron spin resonance,Fourier transform infrared spectroscopy and x-ray photoelectron spectroscopy.According to these results,we find that the active species of the catalysts is VO₂⁺.

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THE SUPPORTED GOLD CATALYSTS FOR CLOSED CYCLE CO₂ LASER

Zheng Ping HAO, Li Dun AN, Hong Li WANG

中国化学快报. 1995, 6(05): 447-448.

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可视化

Sealed-off carbon dioxide lasers encounter problem of dissociation of CO₂,Which causes the output power to fall.Reformation of CO₂ is therefore essential for long life CO₂ lasers.Au/Fe₂O₃ and Au/NiFe₂O₄ are promising candidates for this application.

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ELECTRON TRANSFER BETWEEN Eu³⁺ AND Ce³⁺ IN SrMgF₄ MATRIX

Ying WU, Chun Shan SHI

中国化学快报. 1995, 6(05): 449-452.

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可视化

Emissions of europium(Ⅱ) and europium(Ⅲ) have been observed in SrMgF₄:Eu and SrMgF₄:Eu,Ce phosphors which are synthesized in Ar flow.It is notable that the intensity of the ESR peaks corresponding to Eu²⁺ is increased when cerium ion is incorporated which can be explained by electron transfer mechanism.

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SYNTHESIS AND ¹⁸³W NMR CHARACTERIZATION OF P₄W₃₀Al_{4 (}H₂O)₂O₁₁₂^20- HETEROPOLYANION

Lu MENG, Jing Fu LIU

中国化学快报. 1995, 6(05): 453-454.

摘要 ( )

可视化

A trivacant heteropolytungstate derivative P₄W₃₀Al₄ (H₂O)₂O₁₁₃^30- has been synthesized from the lacunary precursor Na₁₂[α-P₂W₁₅O₅₆]·24H₂O and characterized by IR.polarogram and ¹⁸³W NMR spectrum.¹⁸³W NMR of the title anion consists of eight lines with intensity ratio 1:2:2:2:2:2:2:2 as expected for the dimeric Dawson-typed anion with C_2h symmetry.

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1995年, 第6卷, 第05期　刊出日期：1995-05-20

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1995年, 第6卷, 第05期 刊出日期：1995-05-20

1995年, 第6卷, 第05期　刊出日期：1995-05-20