中国化学快报

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(Salen)Ti(Ⅳ)-Catalyzed Asymmetric Ring-opening of meso Epoxides Using Dithiophosphorus Acid as the Nucleophile

Zheng Hong ZHOU, Zhao Ming LI, Bing LIU, Kang Ying LI, Li Xin WANG, Guo Feng ZHAO, Qi Lin ZHOU, Chu Chi TANG

中国化学快报. 2006, 17(02): 143-146.

摘要 ( )

可视化

The asymmetric ring-opening of epoxides with dithiophosphorus acids catalyzed by a (salen)Ti(Ⅳ) complex formed in situ from the reaction of Ti(OPr-i)₄ and the chiral Schiff base derived from (1R, 2R)-(+)-diaminocyclohexane was realized. The resulting products were obtained with low to good enantioselectivity (up to 73% ee).

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First Total Synthesis of 6-Oxodendrolasinolide

Yi LI, Tao ZHANG, Yu Lin LI

中国化学快报. 2006, 17(02): 147-149.

摘要 ( )

可视化

An efficient total synthesis of 6-oxodendrolasinolide 1, a new farnesane-based homosesquiterpene lactone, starting from geraniol 2 through twelve steps is described. Our work involved two key steps: (1) regioselective alkylation of the anion of vinyldithian 5 with allylic chloride 3¹, (2) Corey's oxidative lactionization method².

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Multicomponent Reaction in Ionic Liquid: A Novel and Green Synthesis of 1, 4-Dihydropyridine Derivatives

Xin Ying ZHANG, Yan Zhen LI, Xue Sen FAN, Gui Rong QU, Xue Yuan HU, Jian Ji WANG

中国化学快报. 2006, 17(02): 150-152.

摘要 ( )

可视化

An efficient and green method for the synthesis of 1, 4-dihydropyridine derivatives mediated in an ionic liquid, [bmim][BF4], through a four-component condensation process of aldehydes, 1, 3-dione, Meldrum's acid and ammonium acetate is disclosed in this paper.

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Synthesis of Novel 1-Arylsulfonyl-4-(1'-N-2', 3', 4', 6'-tetra-O-acetyl-β-D-glucopyranosyl)thiosemicarbazides

Yu Xin LI, Zheng Ming LI, Wei Guang ZHAO, Wen Li DONG, Su Hua WANG

中国化学快报. 2006, 17(02): 153-155.

摘要 ( )

可视化

The synthesis of novel 1-arylsulfonyl -4-(1'-N-2', 3', 4', 6'-tetra-O-acetyl-β-D-glucopyranosyl) thiosemicarbazides via condensation of 2, 3, 4, 6-tetra-O-acetyl-β-D-glucopyranosyl isothiocyanate with substituted phenylsulfonyl hydrazines was described. Their structures and physical properties were confirmed by ¹H NMR, ¹³C NMR spectra, elemental analysis and MS.

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Synthesis and Bioassay of 4-Substituted 2-Oxoglutaric Acids

Qiu Yun CHEN, Qing Shan LIU, Christopher J. SCHOFIELD

中国化学快报. 2006, 17(02): 156-158.

摘要 ( )

可视化

Three 2-oxoglutaric acid analogues were synthesized. Their interaction with factorinhibiting hypoxia-inducible factor (FIH) was studied using LC-MS method. The results show that hydrophobic substitutes of 2-oxoglutaric acids have great influence on their inhibitor activity.

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Stereochemistry Control in Direct 1α-Hydroxylation of 5, 6-trans-Vitamin D₃ by Solid Support

Yong Bin HAN, Jin Ping CHEN, Bai Ning LIU, Guo Qiang YANG, Yi LI

中国化学快报. 2006, 17(02): 159-162.

摘要 ( )

可视化

A solid-phase synthesis of 1α-hydroxylation of 5, 6-trans-vitamin D₃ 8 is described.The solid phase resin acts as a special protecting group, which gives a higher stereoselectivity in oxidation step than classical protecting groups. The stereochemistry control is favored by using high crosslinkage polymer support in a poor solvent. This work may be of benefit to the synthesis of vitamin D system.

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First Total Synthesis of 12-Hydroxy-13-methylpodocarpa-9, 11, 13-trien-3-one

Cheng Lu ZHANG, Xiao Lei ZHU, Ying Ge MA, Li Wei ZOU

中国化学快报. 2006, 17(02): 163-164.

摘要 ( )

可视化

A first facile total synthesis of 12-hydroxy-13-methylpodocarpa-9, 11, 13-trien-3-one 9 was accomplished via a strategy of AC→ABC. In the synthetic process, compound 5 was synthesized through Reimer-Teimann reaction, followed by methylation, reduction, dehydration, addition to ethylene epoxide and chlorination. The target compound 9 was finally obtained through the condensation of Grignard reagent of compound 5 with 6, followed by intramolecular cyclization, reduction and demethylation.

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Grignard Addition to Quinoxalinium Salt: Synthesis of 1, 2-Dihydroquinoxaline and 1, 2, 3, 4-Tetrahydroquinoxaline Derivatives

Lian You ZHENG, Xu BAI

中国化学快报. 2006, 17(02): 165-168.

摘要 ( )

可视化

Grignard additions to a quinoxalinium salt were studied. Depending on the ratio of the reagents and reaction temperature, 1, 2, 3, 4-tetrahydroquinoxaline and 1, 2-dihydroquinoxaline derivatives could be resulted selectively.

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Synthesis of Multiester-appended and Multicarboxylic-appended Imidazolium Ionic Liquids

Wei Guo GENG, Xue Hui LI, Le Fu WANG, Hong Li DUAN, Wei Ping PAN

中国化学快报. 2006, 17(02): 169-172.

摘要 ( )

可视化

Multiester-appended imidazolium ionic liquids were synthesized in a quatemization reaction between the imidazole derivatives carrying single or double esters and ethyl chloroacetate or bromoethane. Multicarboxylic-appended imidazolium ionic liquids were achieved from the hydrolysis of the corresponding ionic liquids. The influences of multifunctional groups on the transition temperatures and viscosity of these new ionic liquids were investigated.

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Synthesis and Characterization of a Novel Galactosylated Cholesterol

Shao Ning WANG, Ying Kun QIU, Hui XU, Yi Hui DENG, Da Wei CHEN

中国化学快报. 2006, 17(02): 173-176.

摘要 ( )

可视化

A novel galactosylated cholesterol with mono-galactoside moiety, (5-cholesten-3-yl)4-oxo-4-[2-(lactobionylamido)ethylamido]butanoate 6 was synthesized. Its chemical structure was characterized by IR, ESI-MS, ¹³C NMR, ¹H NMR. Doxorubicin entrapped in the liposomes containing 10% mol/mol 6 was rapidly accumulated in liver and mainly uptake by parenchymal cells in mice.

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A Facile Synthetic Route to L-Phosphinothricin

Xue Song XU, Han Bing TENG, Guo Fu QIU, Shu Cai LIANG, Xian Ming HU

中国化学快报. 2006, 17(02): 177-179.

摘要 ( )

可视化

A convenient and effective method for synthesis of L-phosphinothricin was described.The highlight was involved in a simple access to the key intermediate L-2-amino-4-chlorobutyric acid derivative from the inexpensive L-methionine.

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An Improved and Convenient Procedure for the Synthesis of Ozagrel

Chun GUO, Xiao Dan LIU, Zhen Gang XIE, Chu Jun LI

中国化学快报. 2006, 17(02): 180-182.

摘要 ( )

可视化

A novel approach to the synthesis of ozagrel is described. The target compound isconveniently prepared from the commercially available material, 1, 1-carboxyldiimidazole (CDI)through the condensation and hydrolyzation.

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Total Synthesis of the Analogue of Icogenin

Shu Jie HOU, Peng XU, Liang ZHOU, De Quan YU, Ping Sheng LEI, Chuan Chun ZOU

中国化学快报. 2006, 17(02): 183-186.

摘要 ( )

可视化

One of the analogues of icogenin, a natural furostanol saponin showing strong cytotoxic effect on cancer cell, was first synthesized via convergent strategy by using diosgenin and available monosaccharides as starting materials.

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Synthesis of 11H-Indeno[1, 2-b]qninolines via the Friedländer Reaction

Feng XU, Ding Qiao YANG, Kai Ling JIANG, Wei GUO

中国化学快报. 2006, 17(02): 187-190.

摘要 ( )

可视化

The nine new 11H-indeno[1, 2-b]quinolines were synthesized in high yield with sodium ethoxide as a catalyst via the Friedänder condensation reaction. The possible reaction mechanism was proposed.

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Synthesis and Characterization of Poly (hydroxylethyl, octanediamine)-DL-aspartamide: a New Tissue Engineering Scaffolds

Gu Ping TANG, Xiao Xiao SONG, Da LI

中国化学快报. 2006, 17(02): 191-194.

摘要 ( )

可视化

Poly (hydroxyethyl, octanediamine)-DL-aspartamide (PHOA) hydrogels were prepared by adding mixture of 1, 8-octanediamine and ethanolamine to PA in DMF at room temperature. The properties of the hydrogels were investigated by FT-IR, ¹HNMR, TGA and cell culture assay.

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New Triterpenes from Siyekucai (Ixeris chinensis)

Shu Jun ZHANG, Jin Lan WANG, Qi Gang DENG, Masayoshi ANDO

中国化学快报. 2006, 17(02): 195-197.

摘要 ( )

可视化

Three new triterpenes, 3β, 21α-dihydroxylupen-18(19)-en (1), 3β, 25-dihydroxytirucalla7, 23(24)-dien (2), and 21α-hydroxy-19α-hydrogentaraxasterol-20(30)-en (3) were obtained from an ethyl acetate extract of the whole plant of Siyekucai (Ixeris chinensis). The structures of 1-3 were determined by spectroscopic methods (EIMS, IR, 1D and 2D NMR).

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A New Hemiterpene Derivative from Prinsepia utilis

Jun Yi HU, Wei QIAO, Yoshihisa TAKAISHI, Hong Quan DUAN

中国化学快报. 2006, 17(02): 198-200.

摘要 ( )

可视化

A new hemiterpenoid, (+)-(2R,3S)-2-chloro-3-hydroxy-3-methyl-γ-buty-rolactone was isolated from the leaves of Prinsepia utilis Royle. Its structure was elucidated by spectroscopic methods and X-ray crystallographic analysis.

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A New Jatrophane Diterpenoid Ester from Euphorbia turczaninowii

Li Gen LIU, Ren Xiang TAN, You Ming GONG

中国化学快报. 2006, 17(02): 201-203.

摘要 ( )

可视化

A new jatrophane diterpenoid ester (2S, 3S, 4R, 5R, 7S, 8R, 13R, 15R)-3, 5, 7, 8, 15-pentaacetoxy-9, 14-dioxojatropha-6(17), 11E-diene was isolated from the whole plant of Euphorbia turczaninowii Kar. & Kir.. Its structure was characterized by spectral analysis and confirmed by X-ray crystallographic analysis.

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Two New Lanostane-type Triterpenoids from Mulgedium tataricum

Xiao Xiong WANG, Zhong Jian JIA

中国化学快报. 2006, 17(02): 204-206.

摘要 ( )

可视化

Two new triterpenoids, lanost-9(11), 23Z(24)-diene-3β, 25-diol (1) and lanost-9(11), 25-diene-3β, 24-diol (2) were isolated from Mulgedium tataricum L. Their structures were elucidated by spectral methods.

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A Novel Phenylpropanoid-substituted Catechin Glycoside and a New Dihydrochalcone from Sarcandra glabra

Yuan LI, Dong Ming ZHANG, Shi Shan YU, Jian Bei LI, Yong Ming LUO

中国化学快报. 2006, 17(02): 207-210.

摘要 ( )

可视化

A novel phenylpropanoid-substituted catechin glycoside glabraoside A 1 and a new dihydrochalcone 3'-(7"-allylphenyl)-2', 4', 4"-trihydroxy-6'-methoxydihydrochalcone 2 were isolated from the herbs of Sarcandra glabra. Their structures were elucidated on the basis of spectroscopic analyses and chiroptical methods.

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A New Triterpenoid Spaonin Isolated from the Seeds of Aesculus assamica Griff

Hong Wei LIU, Xin Sheng YAO, Nai Li WANG, Guo Ping CAI

中国化学快报. 2006, 17(02): 211-214.

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可视化

A new triterpenoid saponin, 21β-angeloylprotoaescigenin-3β-O-[α-L-rhamnopyranosyl(1-3)]β-D-glucopyranosiduronic acid 1, was isolated from the seeds of Aesculus assamica Griff. Its structure was elucidated on the basis of spectroscopic data analysis.

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Two New Eremophilenolides from Ligularia muliensis

Qiu Hong WU, He Xiang WANG, Kun GAO

中国化学快报. 2006, 17(02): 215-217.

摘要 ( )

可视化

Two new eremophilenolides were isolated from the roots of Ligularia muliensis. Their structures were elucidated on the basis of the spectroscopic analysis as 6β-acetoxy-8β-hydroxyl-eremophil-7(11)-en-12, 8α-olide 1 and 6α-hydroxy-8βH-eremophil-7(11)-en-12, 8α-olide 2.

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Two New Dihydroflavanoids from Patrinia villosa Juss

Jin Yong PENG, Guo Rong FAN, Yu Tian WU

中国化学快报. 2006, 17(02): 218-220.

摘要 ( )

可视化

Two new dihydroflavonoids were obtained from the traditional Chinese medicinal herb Patrinia villosa Juss. Their structures were elucidated as (2S)-5, 7, 2', 6'-tetrahydroxy-6, 8-di (γ, γ-dimethylallyl) flavanone (1) and (2S)-5, 7, 2', 6'-tetrahydroxy-6-lavandulylated flavanone (2) by spectroscopic methods including UV, IR, HR-TOF-MS, 1D NMR and 2D NMR techniques.

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Thiol-functionalized MCM-48: an Effective Absorbent of Mercury Ions

Shu Guo WANG, Jin Lin LI

中国化学快报. 2006, 17(02): 221-224.

摘要 ( )

可视化

Mercaptopropyl groups were grafted onto the pore walls of mesoporous molecular sieves MCM-48. The pore structures were characterized by powder X-ray diffraction and N₂ adsorption analysis. Elemental analysis confirmed that the material with high organic moiety (2.2 mmol/g) had been obtained. ¹³C MAS NMR verified the tethered organic groups. The thiol-functionalized MCM-48 showed effective capture of mercury ions, and all of the organic ligands were accessible for the binding of mercury ions.

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Behavior and Quantification Studies of Phoxim Pesticide Using Cyclic and Linear Sweep Stripping Voltammetry at a Mercury Electrode

Ping QIU, Yong Nian NI

中国化学快报. 2006, 17(02): 225-227.

摘要 ( )

可视化

The adsorptive and electrochemical behaviour of phoxim on a hanging mercury drop electrode were explored in NH₃·H₂O-NH₄CL buffer by using cyclic and linear sweep voltmmery The procedure was successfully applied for the assay of phoxim in vegetable and fruit samples.

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Thiacrown Molecular Basket with High Extracting Selectivity towards Ag⁺

Qing Sheng LIU, Shu Ling GONG, Yuan Yin CHEN

中国化学快报. 2006, 17(02): 228-230.

摘要 ( )

可视化

By bridging 1, 3:4, 6-bis(3, 6-dihydroxy-1, 2-xylylene)tetrahydro-3a, 6a-diphenyl imidazo[4, 5]-imidazole-2, 5(1H, 3H)-dione 1 with S(CH₂CH₂OCOCH₂Cl)₂, thiacrown molecular basket 2c was prepared for the first time. It was found that the compound exhibited very poor affinity towards alkali metal ions but high extracting selectivity towards silver ion.

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Ionic Liquid and HP-β-CD Modified Capillary Zone Electrophoresis to Separate Hyperoside, Luteolin and Chlorogenic Acid

Yue Ling WANG, Zhong Bo HU, Zhuo Bin YUAN

中国化学快报. 2006, 17(02): 231-234.

摘要 ( )

可视化

Ionic liquid (1-ethyl-3-methylimidazolium tetrafluoroborate, 1E-3MI-TFB) and HP-β-CD as modifier was added to the buffer to separate hyperoside, luteolin and chlorogenic acid.Experiments explored the effect of concentration of 1E-3MI-TFB and HP-β-CD on separation.The results indicated that 1.0 mmol/L HP-β-CD and 1‰ (v/v) 1E-3MI-TFB added to the buffer simultaneous y could achieve a good compromise of resolution and analysis time. Capillary experiments and UV spectra indicated that there was interaction between 1E-3MI-TFB and analytes.

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SBA-15 Modified Carbon Paste Electrode for Rapid cTnI Detection with Enhanced Sensitivity

Nong Yue HE, Hui Shi GUO, Di YANG, Chun Rong GU, Ji Nan ZHANG

中国化学快报. 2006, 17(02): 235-238.

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可视化

A novel electrochemical immunoassay for cardiac troponin I (cTnI) combining the concepts of the dual monoclonal antibody "sandwich" principle, the silver enhancement on the nano-gold particle, and the SBA-15 mesoporous modified carbon paste electrode (SBA-MCPE) is described. Four main steps were carried out to obtain the analytical signal, i.e., electrode preparation, immunoreaction, silver enhancement, and anodic stripping voltammetric detection.A linear relationship between the anodic stripping peak current and concentration of cTnI from 0.5 to 5.0 ng/mL and a limit of detection of 0.2 ng/mL of cTnI were obtained.

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Synthesis and Characterization of Amphiphilic Block Copolymer Containing PVP and Poly(5-benzyloxytrimethylene carbonate)

Ying Xia WANG, Feng HE, Ren Xi ZHUO

中国化学快报. 2006, 17(02): 239-242.

摘要 ( )

可视化

Amphiphilic copolymer of 5-benzyloxytrimethylene carbonate (BTMC) with poly (vinyl pyrrolidone) (PVP) was successfully synthesized using immobilized porcine pancreas lipase (IPPL) or SnOct₂ as catalyst. Hydroxyl terminated PVP, synthesized with 2-mercaptoethanol as a chain transfer reagent, was employed as a macroinitiator. The resulting copolymers were characterized by GPC, ¹H NMR and IR. Increasing the BTMC/PVP-OH feed ratio ([B]/[P])resulted in the increase of M_n of corresponding copolymers and the decrease of M_w/M_n.Immobilized enzyme has comparable catalytic activity to SnOct₂ for the copolymerization.

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Novel Isatin-Schiff Base Cu (H) and Ni(H) Complexes. X-ray Crystal Structure of Bis[3-(4-hexylphenylimino)-1H-indol-2(3H)-one]-dichlorocopper(H) Complex

Ayse ERCAG, Sema Oztürk YILDIRIM, Mehmet AKKURT, Mahmure Ustün OZGUR, Frank W. HEINEMANN

中国化学快报. 2006, 17(02): 243-246.

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可视化

Schiff base ligand (HL) derived from 4-hexylaniline with isatin (1H-indole-2, 3-dione)and its complexes with Cu(Ⅱ), Ni(Ⅱ) were prepared and characterized by analytical, spectroscopic (IR, UV-Vis, Mass) techniques, electrical conductivity, magnetic and thermal measurements. The crystal and molecular structure of [Cu(HL)₂Cl₂] was determined by a single-crystal X-ray diffraction study. The molecular structure of the title compound has an inversion center on the Cu atom.

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Monitor of Polymerization of Inverse Microemulsions Containing Methyl Methacrylate and Acrylic Acid

Xiao LI, Sheng Ping XIA, Wei Jie ZENG, Wei Ying ZHANG, Sheng Xiong DONG

中国化学快报. 2006, 17(02): 247-250.

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可视化

The polymerization of the inverse microemulsions composed of methyl methacrylate, acrylic acid, sodium dodecyl sulfate and water was monitored by refractometer, conductometer and time-resolved light scattering device. The results showed that refractive index, conductivity or intensity distribution of scattered light changed along with polymerization, and different processes of polymerization could be identified.

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Modification of Nano-alumina Surface by Michael Addition Reaction

Jie ZHANG, Jian YU, Zhao Xia GUO

中国化学快报. 2006, 17(02): 251-252.

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可视化

A general method for modification of nano-alumina surface is investigated using Michael addition reaction with α, β-unsaturated carbonyl compounds.

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Study on the Interaction of Pd-TMPyP with ctDNA by Solid-substrate Room Temperature Phosphorescence

Li Min GUO, Wen Juan DONG, Chuan DONG

中国化学快报. 2006, 17(02): 253-254.

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可视化

The interaction between calf thymus DNA (ctDNA) and Pd (Ⅱ) meso-tetrakis(4-N-methyl pyridiniumyl) porphyrin (Pd-TMPyP) was investigated by steady solid-substrate room temperature phosphorescence (SS-RTP). The SS-RTP intensity and lifetime of Pd-TMPyP enhanced with the increasing ctDNA. The anion quenching experiment of Pd-TMPyP indicated that Pd-TMPyP intercalated into ctDNA, which was also approved by UV-Vis spectra.

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Thermoregulated Organic Biphasic Hydrogenation of 1-OcteneCatalyzed by Ru/PETPP Complex

Ya Dong LU, Yan Hua WANG, Zi Lin JIN

中国化学快报. 2006, 17(02): 255-257.

摘要 ( )

可视化

Thermoregulated organic biphasic system composed of triethylene glycol monomethyl ether (TGME) and n-heptane was first applied to the hydrogenation of 1-octene. Under the optimal conditions: P(H₂)=5.0MPa, T=80℃, t=3h, 1-octene/Ru=1000(molar ratio), the yield of n-octane reached up to 99.6%. Furthermore, the simply decanted catalyst could be reused for 10 times without apparent loss of catalytic activity.

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Redox Polymerization of Methyl Methacrylate in the Fluorous Triphasic System

Shi Zhen CHEN, Yun Peng BAI, Zhao Long LI

中国化学快报. 2006, 17(02): 258-260.

摘要 ( )

可视化

Methyl methacrylate (MMA) was polymerized by using of benzoyl peroxide (BPO) and N, N-dimethylaniline (DMA) as an redox initiator in fluorous triphasic system at room temperature.The polymerization was occurred in both initiator layer and monomer layer in a U-tube. It was found that PMMA obtained from the initiator layer with relatively narrow polydispersity.(PDI=1.38)

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Ruthenium Bisphosphine Catalyst on Functionalized Silica:Novel Efficient Catalyst for Carbon Dioxide Hydrogenation to Formic Acid

Yi Ping ZHANG, Jin Hua FEI, Ying Min YU, Xiao Ming ZHENG

中国化学快报. 2006, 17(02): 261-264.

摘要 ( )

可视化

A novel efficient catalyst for the hydrogenation of carbon dioxide to formic acid ruthenium bisphosphine on functionalized silica was in situ synthesized, affording turnover frequency (TOF) of 1190 h^-1 at 100% selectivity under 80C with total pressure of 16.0 MPa. The catalyst can be separated from the reaction mixture easily and reused with moderate loss of activity.

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Preparation of Copolymer of Salen-crown Ether Complexes and its Catalytic Activation for Molecular Oxygen

Rong Min WANG, Xiao Dong LI, Yu Feng HE

中国化学快报. 2006, 17(02): 265-268.

摘要 ( )

可视化

A new stable salen Schiff base cobalt and crown ether sodium complex (SalCo-NaB18C6) was prepared through copolymerization. This copolymer complex was applied to catalytic oxidation of hydrocarbon compound with molecular oxygen without reductant, which was shown the higher activity and selectivity for ketone, and reused effectively.

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Metallothionein Induction by Cd(Ⅱ) and Zn(Ⅱ)

Xiao Yan ZHANG, Xin GAO, Yan LI, Xiao Dong FAN

中国化学快报. 2006, 17(02): 269-272.

摘要 ( )

可视化

The induction of MT(metallothionein) by Cd(Ⅱ) and Zn(Ⅱ) in renal proximal tubule cells (LLC-PKI) and the effects of simultaneous administration of Cd(Ⅱ) and Zn(Ⅱ) on MT induction were discussed. The two metals administered together are able to induce MT to almost 40μg MT/mg protein. The additive production of MT may be due to two different effects by Cd(Ⅱ) and Zn(Ⅱ) on the activation of MT transcription. The experiments of simultaneous administration of Cd(Ⅱ) and Zn(Ⅱ) to the renal proximal tubule cells demonstrated the interaction of these metals, MT induction and proximal tubule toxicity.

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Preparation of Langmuir-Blodgett Film of Oligophenylenevinylene at the Air/Water Interface and Study on its Fluorescence

Kai HUANG, Li Chuan MA, Hao Fei GONG

中国化学快报. 2006, 17(02): 273-276.

摘要 ( )

可视化

Methoxy groups is favorable for film-forming property of oligophenylenevinylenes (OPVs) and the Langmuir-Blodgett film of 1, 4-bis (3, 4, 5-trimethoxystyryl)-2, 5-dimethoxybenzene (MOPV) was prepared. It might be the formation of H-aggregate of MOPV in the LB film that results in a 57 nm blue shift of λ_max for the absorption and a 58 nm red shift of λ_max for the fluorescence, respectively.

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Selective Permeation of CO₂ Through Modified PVSA/PS Composite Membrane

Ying ZHANG, Zhi WANG, Juan ZHAO, Ji Xiao WANG, Shi Chang WANG

中国化学快报. 2006, 17(02): 277-280.

摘要 ( )

可视化

A new fixed carrier membrane material VSA-SA for CO₂ separation was prepared through the chemical modification of PVSA. The selective permeation of CO₂ through VSA-SA/PS composite membrane was performed with CO₂/CH₄ system. The VSA-SA/PS composite membranes possess better CO₂ permselectivity than PVSA/PS composite membrane.

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Theoretical Study of the Scattering Resonance State, Reaction Mechanism and Partial Potential Energy Surface of the F+CH₄→HF +CH₃ Reaction

Qiang WANG, Zheng Ting CAI, Da Cheng FENG

中国化学快报. 2006, 17(02): 281-284.

摘要 ( )

可视化

The partial potential energy surface was constructed by ab initio method [QCISD(T)/6-311++G(2df, 2pd)]for F+CH₄→HF+CH₃ reaction system. It not only explained the reaction mechanism brought forward by Diego Troya by means of quasiclassical trajectory (QCT) but also successfully validated Kopin Liu's experimental phenomena about the existence of the reactive resonance. The lifetime of the scattering resonance state was about 0.07 ps. All these were in agreement with the experiments.

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2006年, 第17卷, 第02期　刊出日期：2006-02-20

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2006年, 第17卷, 第02期 刊出日期：2006-02-20

2006年, 第17卷, 第02期　刊出日期：2006-02-20