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    24 April 1995, Volume 11 Issue 2
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    Articles
    An IR Study on Adsorption of CO and NO on Copper Ion-exchanged Zeolite Beta
    ZHOU Qun, QIU Shi-lun, PANG Wen-qin, XIN Qin, LI Guo-qiang
    1995, 11(2):  91-97. 
    Abstract ( )   PDF (326KB) ( )  
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    Thee adsorption of COand NOon copper ion-exchanged zeolite Beta was investigated using IRmethod.It was found that the thermalvacuum pretreatment procedure could result in the reduction of Cu2+ions in zeolite Beta.The adsorption of CO on Cu+ sites in zeolite Beta closely follows Langmuir isotherm.Another Cu+ species may form during the reaction between water and CO.The catalytic decomposition of NO on the zeolite was observed at room temperature,indicating that the decomposition reaction may occur between two coordinated NO ligands of the same dinitrosyhc complex.Furthermore,the appearance of two series of NO adsorption bands reveals that copper ions existing at different cation sites may have different effect on the adsorption and decomposition of NO molecules.
    Isomerization and Antiacidolysis Properties of Molybdic Heteropoly Blues with Keggin Structure
    WANG Zuo-ping, XU Lin, SHEN En-hong, WANG En-bo
    1995, 11(2):  98-104. 
    Abstract ( )   PDF (473KB) ( )  
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    For eight kinds of acidic potassium salts of hetcropoly blues which have not been reported in literature,the isomerization reaction in solution for these two-and four-electron hcteropoly blue solids were investigated by means of polarograms,cyclic voltammetry,31P NMR and X-ray diffraction methods.The heteropolynier of PMo12 and AsMo12 converte to their β-isomers during isomerization reaction which were found to have antiacidolysis property.
    Studies on Mixed Trialkyltm Derivatives Ⅶ——Studies of [(Phenyldimethylsilyl)methyl]-dicyclohexyltin Carboxylates
    XIE Qing-lan, SHA Yin-lin, YANG Zhi-qiang
    1995, 11(2):  105-110. 
    Abstract ( )   PDF (397KB) ( )  
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    Seventeen derivatives of mixed trialkyltin carboxylates with the formula (PhMe2SiCH2)Cy2SnO2CR have been synthesised.The results of IR NMR(1H,13C,119Sn) and MS showed that this kind of compounds is four-coordinated and that there are two good linear relationships between the δ 119Sn and Hammett constants of para-substitutent of the corresponding aryloxy-acetates and arylcarboxylates.These compounds have a good acaricidal activity in the preliminary bioassay tests.
    Solid State Photochemistry of Nitrobenzaldehydes
    DU Da-nung, WANG Yong-mei, XIONG Guo-xiang, WANG Wen-guang, MENG Ji-ben
    1995, 11(2):  111-116. 
    Abstract ( )   PDF (447KB) ( )  
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    The photochemical reaction of nilrobenzaldehyde with indole and antipyrine was investigated in solid state.The structures of the new products were identified by means of IR,MS,1H NMR and elemental analysis,and the crystal structure of audition product 2c was determined by X-ray diffraction analysis.The mechanism of this reaction was also proposed.
    FT-Raman Spectroscopic Studies on the Interaction of Metal Ions With Sphingomyelin Bilayer
    ZHAO Bing, ZHANG Sou-bo, LIU Ju-zheng, YUAN Chun-bo, ZHAO Da-qing, NI Jia-zuan, HUANG Fen
    1995, 11(2):  117-121. 
    Abstract ( )   PDF (376KB) ( )  
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    The interaction of trivalent lanthanide ions and divalent calcium ions with sph- ngomyelm bilayer has been studied by FT-Raman spectroscopy.The results showed that the bonding of metal ions to the phosphate group of sphingomyelin bi-iayer,either La3+or Ca2+did not change the conformation of the choline group,that is,O-C-C-N+ is still in its gauche conformation.The presence of metal ions changed the states of the interfacial region from liquid-like to amorphous state and even to crystalline.They increased the fluidity of acyl chains of sphingomyelin bilaver and made them packed disorderly.
    Quantum Chemical Studies on the Mechanism of Producing Oxygenates in Fischer-Tropsch Synthesis on M/SiO2(M = Ni,Ru,Rh,Pd)
    ZHU Tian-wei, HAO Zheng-ping
    1995, 11(2):  122-130. 
    Abstract ( )   PDF (548KB) ( )  
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    EHMO calculations and orbital analyses of fragments have been performed for the formation of oxygenates in Fischer-Tropsch synthesis on the butterfly model for four different metal (Ni,Ru,Rh,Pd) catalysts supported on SiO2.Calculations were made for the four processes,i.e.,CO-dissociation;Coupling of CO and Hto produce CHO;Insertion of CO to M-CH3;insertion of CH2 to M-CH3 On the basis of comparing the degree of CObonds activation and the energy barriers of the foregoing processes for these four catalysts,it is concluded that Ni/SiO2 can be used as the methanation catalyst.On Ru/SiO2 and Rh/SiO2 C2-oxygenated compound can be produced (acetaldehyde),especially Rh/SiO2 is the even better catalyst,and Pd/SiO2 is a methanol synthesis catalyst.
    FTIR Spectroscopic Studies on the Conformational Equilibrium of Liquid 2,4-Dimethyl-1,3-Pentadiene
    ZHAO Bing, ZHANG Sou-bo, LIU Ju-zheng, FU Hong-gang
    1995, 11(2):  131-136. 
    Abstract ( )   PDF (388KB) ( )  
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    Investigations of 2,4-dimethyl-1,3-pentadiene by variable temperature FTIRspectra have concluded that the compound is a mixture of two kinds of single bond isomer,i.e.,s-traiis and s-cis conformers.The changes of IRband intensities have been recorded at research temperature range.The values of △H° and △S° between two stable conformers have been deduced to be 4.37 kJ/mol and 2.48 J/mol Krespectively.
    Scaling for Experimental Inner-Sphere Reorganization Energy of Hydrated Ions via Accurate Potential Function
    BU Yu-xiang, DENG Cong-hao
    1995, 11(2):  137-144. 
    Abstract ( )   PDF (554KB) ( )  
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    Reported here are several new calculation methods for the inner-sphere reorganization energy of hydrated metal ions involved in electron transfer processes.It is based on the self-exchange model of reorganization and utilizes the more exact potential functions between central metal ion and the inner-sphere ligands.The parameters involved are determined via the spectroscopic and thermodynamic data.The predictions of the inner-sphere reorganization energies from those models agree well with the photoemission experimental results.
    Synthesis and Phase Behavior Studies of Two New Chiral Liquid Crystals of Schiff Base——The Influence of Intramolecular Hydrogen Bond on the Phase Behavior
    TIAN Yan-qing, XING Pei-xiang, ZHAO Ying-ying, TANG Xin-yi, SU Feng-yu, ZHAO Xiao-guang, ZHOU En-le
    1995, 11(2):  145-149. 
    Abstract ( )   PDF (575KB) ( )  
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    Two new chiral liquid crystals of schiff-base type have been synthesized.This series of compounds contain α-chloro acidic ester chain prepared from commercially available L-valine.Both of the compounds exhibit tilted smectic phases;their phase transitions were studied using DSCand polarized optical microscopy;the influence of intramolecular hydrogen bonds on the phase behavior was studied as well.
    Studies on Increasing the Activity of Selenium-Containing Abzyme (Ⅰ)——Synthesis, Characterization and Properties of Hapten and Antigen
    DING Lan, ZHANG Guang-tian, SUN Qi-an, ZHU Zhen-qi, LUO Gui-min
    1995, 11(2):  150-154. 
    Abstract ( )   PDF (332KB) ( )  
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    The thiol group of glutathione (GSH) reacts specifically with 2.4-di-m-trochlorobenzene to give S-substituted dinitrophenyl glutathione (GSH-S-DNP);two carboxyl groups of GSH-S-DNP were further esterified by n-butanol to produce the hapten,multisubstrate analog GSH-S-DNP Butyl Ester (GSH-S-DNP BE).The primary structure of the hapten was characterized by the free ammo group analysis,1H NMR,IRdeterminations and the elemental analysis.The hapten was then conjugated to bovine serum albumin (BSA) in the presence of glutaraldehyde.The reaction mixture was purified by Ultrogel AcA54 coluni chromatography to give the antigen.On an average,25 haptens were bound to each BSAmolecule.Electrophoresis analysis showed that the average molecular weight of the antigen was 87 KD.CDspectrum showed that the α-helix content of the antigen increased.
    Synthesis of Macroporous and High Crosslinking Styrene-Methacryloyloxyphenyl Propane-(bisvinyl-A) Copolymers
    JU Zhi-qiang, WU Tong-hao, YANG Hong-mao, JIANG Yu-zi, TANG Xin-yi, ZHAO Bing
    1995, 11(2):  155-157. 
    Abstract ( )   PDF (457KB) ( )  
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    Studies on the Redox Properties of Undecatungstotitanates Containing One Kind of Transition Metal
    LIU Jing-fu, WANG Ying, WANG Fu-quan, YANG Qi-hua, WANG Wei
    1995, 11(2):  158-162. 
    Abstract ( )   PDF (363KB) ( )  
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    Electrochemical Properties of Polypyrrole-Coated Microelectrode Array and the Fabrication of Polypyrrole-Based Microelectronic Devices
    CAI Chen-xin, JU Huang-xian, CHEN Hong-yuan
    1995, 11(2):  163-169. 
    Abstract ( )   PDF (677KB) ( )  
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    Synthesis of A New Group of Flavones Containing Crown Ether Moiety
    LI Ting-sheng, ZHU Chuan-fang, LI Zhong-hua, WEI Xu-dong, HU Hong-wen
    1995, 11(2):  170-173. 
    Abstract ( )   PDF (196KB) ( )  
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    Studies on the Steroids of Marine Sponge
    ZENG Long-mei, ZENG Zhi, SU Jing-yu
    1995, 11(2):  174-177. 
    Abstract ( )   PDF (290KB) ( )  
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    Novel Bis-(N-alkyl-N ,N-dimethyl-ammonium) Polyethyleneglycol Ether Salts as Phase Transfer Catalysts in the Condensation of l,4-Diacetyl-2,5-piperazinedione and Aldehydes
    WANG Li-xin, XU Ming-hua, SHI Yao-zeng, HU Hong-wen
    1995, 11(2):  178-184. 
    Abstract ( )   PDF (579KB) ( )  
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Editor-in-Chief:
Jihong YU
ISSN 1005-9040
CN 22-1183/O6
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