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    24 August 1992, Volume 13 Issue 8
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    Articles
    The Synthesis, Crystal Structure and Spectral Properties of 2,2'-Dihydro-2,2'-Bipyridinium Di(triiodide)
    LIU Shi-Xiong, WANG Zhe-Min, ZHANG Bin
    1992, 13(8):  1013-1016. 
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    The title compound,(2,2' bipyH2)(I3)2,was prepared and the crystal structure was determined.C10H10NS2I6 M=921.65.belongs to triclinic system and space group P1 with a=0-80284(8) nm,b=0.95993(6) nm,c=0.71660(9) nm;α=102.016(9)°,β=111.933(9)° γ=101.650(8)°;V=0.4767(1) nm3,Z=1,Dc=3.21 g·cm-3,λ(Mo Ka)=0.071069 nm,μ=98.77 cm-1,F(000)=404.T=296K and final R=0.038 for 1506 observed reflections.The crystal contains [(2,2'-bipyH2) (I3)2]∞,chains formed by planar trans-(2,2'-bipyH2)2+ cations and linear I3- anions,between the chains in the same layer there are hydrogen bonds N-H...Iwith N...Idistance of 0.349 nm.Additionally,the title compound was characterized by UV-Vis spectra and 1H NMR spectra.
    Synthesis and Crystal Structure of the Two-Electron Reduced Heteropoly Blue of Molybdosilic Acid with α-Keggin Structure
    WANG En-Bo, ZHANG Lan-Cui, WANG Zuo-Ping, HUANG Ru-Dan, ZHANG Shu-Xia, LIN Yong-Hua
    1992, 13(8):  1017-1021. 
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    The present paper describes the crystal structure of the title compound H6SiMo2γMo10иO10·10H2O prepared by electrolysis.The complex crystallizes in the triclinic space group P1 with a=1.4077(3) nm,b=1.4176(3) nm,c=1.3752(2) nm;α=111.04(1)°,β=93.99(1)°,7=119.09(1)°;Z=2.9005 independent reflections were collected.The structure was solved by direct method and refined by block diagonal-matrix least-squares to R=0.052 for 6287 reflections.The structure of the heteropoly blue retains the original structure of its parent acid basically,but some octahedra change distortedly.
    Luminescence of Tb3+ and Its Sensitization by Ce3+ in Matrix La2Na2Sr6(PO4)6Br2
    SONG Jia-Qing, HUANG Zhu-Po
    1992, 13(8):  1022-1025. 
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    The phosphor samples were prepared by high temperature solid state reactions.Pho-toluminescence of Tb3+ ions and its sensitization by Ce3+ ions were studied systematically.Luminescence of Tb3+ excited by UV 254 nm is weak,but can be enhanced by the sensitization of Ce3+ ions.The mechanism of energy transfer from Ce3+ to Tb3+ is of resonance nature caused by dipole-dipole interaction.Efficiency of such energy transfer was calculated.
    Studies on Coenzyme B12 Model Complexes(Ⅴ)——Kinetics of Co-C Bond Cleavage of RCo(SaIen)L Complexes
    CHEN Hui-Lan, WANG Zhi-Lin, GUI Shi-Ping, CHEN Guan-Qing, TANG Wen-Xia
    1992, 13(8):  1026-1029. 
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    The kinetics of thermolysis of RCo(Salen)Lcomplexes in methanol was studied by using UV-Vis spectrophotometry.The observable rate constants and the energy of activation were determined.The sequence of the rate constants is i-C3H7>i-C4H3>n-C4H9>n-C3H7>C2H5 and of the energy of activation is i-C3H7<n-C4H9<i-C4H9<n-C3H7<C2H5 The effects on thermolysis were discussed.
    Synthesis and Characterization of Pr3N-ZSM-5 Molecular Sieve
    ZHAO Da-Qing, QIU Shi-Lun, PANG Wen-Qin
    1992, 13(8):  1030-1032. 
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    The ZSM-5 and its larger single crystals were crystallized hydrothermally from Pr3N-SiO2-AS2O3-H2O-HF (Pr3N=tripropylamine) system.The scanning electron microscopy and electron probe microanalysis show that the morphology of ZSM-5 crystals was influenced by A! contents and the crystal nuclei were first produced from the gel enriched in silicon.Tripropylamine molecules in the protonated from are occuluded in the chanels.The numbers of organic template molecules per unit cell are 4.15.
    The Qualitative and Quantitative Analysis of "Grey" Analytical Systems
    XIE Yu-Long, YU Ru-Qin
    1992, 13(8):  1033-1038. 
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    The first step of the calibration oi "grey" analytical systems with known scope of pos-sibiy existing components is So identify the truely existing species in a specific sample.In this pa-per,a specially designed matrix which consists of the spectra of all possibly existing species and the analytical sample was constructed,and a method based on the singular value decomposition (SVD) of this matrix was developed to pick out the really components existing in the mixture according to the elements of the relevant singular vector The qualitative detection was followed by quantitative determination by using ordinary regression procedure The method was testified by simulated spectra and experimentally measured data with satisfactory results.
    Improved Oscillographic Chronopotentiometric Method
    ZHU Jun-Jie, ZHENG Jian-Bin, BI Shu-Ping, GAO Hong(H. Kao)
    1992, 13(8):  1039-1042. 
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    This paper presents a new method which improved osciilographic chronopotentiometric method.This method can improve dE/dt～E curve and can overcome some drawbacks of dE/dt～E curve.It changes incision of dE/dt～E curve into peak and has the advantage of a good re-producibility,wide linear range and high sensitivity.As using it,we applied inner marker method and frequency-spectrum analysis to carry out quantitative analysis,satisfactory results were obtained.
    Simplex Optimization Method for the Determination of the Composition of Ternary Complex Copper(Ⅰ)-Neocuproine-Methyl Orange
    JIANG Xin-Min, YAN Zheng-Yu, WANG Shen
    1992, 13(8):  1043-1046. 
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    Simplex optimization principles were applied to determining the composition of ternary complex of Cu(I)-Dphen-MO by two methods.Cu(I) reacts with neocuproine(2,9-dimethyl-1,10-phenanthroline) and methyl orange (MO) to form a colour ternary complex which could be extracted into CHCl3 and showed an absorption maximum at 420 nm.The molar ratio of the components of Cu(I):Dphen:MO in the complex was estimated to be 1:2:1,the composition is [Cu(Dphen)2]+MO-.It is shown that the two methods are simple and accuracy.
    Digital Simulation of Cyclic Voltammetry for Quasireversible Surface Reaction Followed by a First Order Coupling Chemical Reaction
    WANG Chuan, CHEN Xiao-Ming, HE Pei-Xin
    1992, 13(8):  1047-1050. 
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    Digital simulation was employed to study the cyclic voltammetric response of reversible,quasireversible and irreversible surface reaction involving a first order irreversible chem-ical reaction .The CVresponse of p-methoxyazobenzene in acidic medium isstudied carefully as theoretical verification.
    Determination of Trace Estrogens by the 1.5th Order Differential Stripping Analysis Using a Hanging Mercury Electrode
    HU Sheng-Shui, HE Qiong, ZHAO Zao-Fan
    1992, 13(8):  1051-1054. 
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    The present paper covers a new and sensitive method for the determination of trace estrogens,and the 1.5th order differential stripping analysis.Adetection limit 2×10-10 mol/Lof estrogens was estimated after an adsorptive accumulation time of 10 min.The peak height is directly proportional to the concentration of estrogens in the range of 1×10-6～1×10-9mol/L.The method has been used for the assay of estriol in urine samples.
    New Circuit of Providing Reciprocal Oseillographic Chronopotentiogram
    ZHENG Jian-Bin, ZHU Jun-jie, GAO Hong(H. Kao)
    1992, 13(8):  1055-1056. 
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    This paper presents a new circuit which can provide reciprocal oscillogram and the authors discussed how to get reciprocal oscillogram.This new circuit would be useful for realization recipprocal oscillographic chronopotentiornetry in solving analytical problems practically.
    An Improvement of Slotted Quartz Tube Flame Atomiation Technique
    HUANG Gan-Quan, LI Yun-Qing
    1992, 13(8):  1057-1059. 
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    The slotted quartz tube atom-trapping technique with a high sensitivity is reported in the paper.The effects of various conditions (flame status,air flow,collection time,medium of solution and slotted tube height etc.) on the sensitivity of cadmium was investigated in detail.The results shew that the best sensitivity is obtained when fuel-lean and fuel-rich flames are respectively used for collection and release.The characteristic concentration of 3.7×10-5μg/mLwas obtained for 0.4 ng/mLof cadmium solution being trapped for 1 min.The sensitivity of cadmium may be increased 270-fold in comparison with the convention flame atomic absorption spectrometry.The coefficient of variation is 4.1 % for 0.4 ng/mLcadmium solution after trapping for 1 min (n=11).The cadmium in taxodium ascenders has been determined directly.
    Studies on the Complex of Bismuth-Xylenoi Orange by Adsorptive Stripping Voltammetry
    WANG Zhen-Hui, ZHOU Shu-Ping, LIU Xian-Zhuang
    1992, 13(8):  1060-1062. 
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    In this paper,the determination of the complex of bismuth-xylenol orange by adsorp-tive stripping voltammetry in sodium citrate-HCl medium (pH 5) is proposed.This complex was accumulated on the surface of the mercury electrode in an open circuit.The composition ratio of bismuth and xylenol orange is 1:2.The adsorption character at mercury electrode accords with that of the isothermal line of Frumkin.The adsorption coefficient (β=2.8×106) and the attractive factor (v=0.52) were determined.The mechanism of the complex wave was investigated.This method was applied to the determination of trace amounts of bismuth in human hair and human serum with satisfactory results.
    1,3,2-Oxazaphospholidine Derivatives(Ⅲ)——Studies on Synthesis and Biological Activity of 1,3,2-OxazaphosphoIidine Derivatives
    YANG Hua-Zheng, ZHANG Yue-Hua
    1992, 13(8):  1063-1066. 
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    Using THF as the solvent,a series of new 2-substituted phenoxyl(anilino)-1,3,2-ox-azaphospholidine derivatives were prepared by the reaction of phosphorus sulfochloride with ami-noethanol directly and then treating with phenol or aniline in the presence of triethylamine.This is one pot reaction without the separation and purification of any intermediate and a high yield was obtained.AHof these compounds were confirmed by 1H NMR,IR,MS and elementary analysis,Their 1H NMR,and MS spectra and biological activity are discussed.
    Microdetermination of Organic Oxygen Using a New Ni/Carbonaceous Resin Catalyst by Combustion
    YUE Chang-Rong, ZUO Yu-Min, LUO Tong, XUAN Guang-Shan
    1992, 13(8):  1067-1070. 
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    A new method for the preparation of Ni/carbonaceous resin catalyst with high degree of nickel dispersion and high mechanical strength is described in this paper.The results obtained by using this catalyst for the microdetermination of organic oxygen in coulometric method are satisfactory.Besides,the valent state of Ni,the surface shape and distribution of Ni on this catalyst and the effect of Ni content on the catalytic activity were studied.
    Synthesis of Chal cones via Lithium Arylides
    LI Liang-Zhu, ZHAO Zhi-Gang, YUAN Jin-Fang, GAO Da-Li
    1992, 13(8):  1071-1074. 
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    The phenyl lithium,2-methoxyphenyl lithium and 2,4-dimethoxyphenyl lithium reacted with the cinnamic acid to produce a corresponding chalcone in a good yield respectively,2,6-Dimethoxyphenyl lithium could not react with cinnamic acid,but reacted with methyl cinna-mate to produce 2',6'-dimethoxychalcone.Similarly,2',4',6'-trimethoxychalcone and 2',4',4,6'-tetramethoxychalcone were produceed in the same manner.2,4-Dimethoxyphenyl lithium and 2,4,6-trirnethoxyphenyl lithium can also react with 7-butyrolactone to produce 7-hydroxypropyl (2,4-dimethoxyphenyl) ketone and γ-hydroxypropyi (2,4,6-trimethoxyphenyl)ketone respectively.It is not found that the tertiary alcohol was formed in the cases.
    Studies on the Synthesis of Phosphonodipeptides and Their Herbicidal Activity(Ⅲ)
    CHEN Ru-Yu, ZHANG Yue-Hua, CHENG Mu-Ru
    1992, 13(8):  1075-1079. 
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    It was reported in literature that phosphonopeptides had significant biological activities.In order to look for new herbicides,a series of novel phosp'honodipeptides have been prepared by the reaction of PhRP(O)CHRNH2 with ClCH2CONHCH(CH3)COOCH3 in the presence of triethylamine in benzene.Their molecular structures were proved by 1H NMR,IR and MS.Their spectroscopic spectra and biological activities were discussed.It is found that some of them show good herbicidal activity.Benzyloxycarbonylaminomethyl phenyl phosphinic acid was also synthesized in good yield by modification of the conventional method.The advantages of the new process and the reaction mechanism are discussed.
    Studies on EIMS and MIKES of the Derivatives of 2,4-Diamino-5-(Substituted) Benzyl-Pyrimidine
    PANG Ji-Hai, PENG Jia-Ro, LIANG Wei-Sheng, WU Zhi-Ru, ZHANG Hai-Ying, FANG Zhao-Xia, LI Ren-Li
    1992, 13(8):  1080-1083. 
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    The present paper covers the electron ionization mass spectra (EIMS) and collisional activation dissociation (CAD),mass-analyzied ion kinetic energy spectra (MIKES) of eight 2,4-diamino-5-(substituted) benzyl-pyrimidine derivatives.Accurate molecular weight of the compounds were determined by means of high resolution experiments.The rules of the cleavage of ether bonds and 2,4-diamino-5-(substituted) benzyl-pyrimidine ring in the compounds were proved by the CAD MIKES technique.The fragmentations of sample 4 were studied in detail.
    Studies on the Triazol Derivatives of Phosphonodithioate and Phosphoramidothioate and Phosphoramidithioate '
    SHI Yan-Nian, FANG Jian-Xin, XU Liang-Zhong
    1992, 13(8):  1084-1086. 
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    Eleven new triazol organic phosphorus compounds with general formulas I,Ⅱ and Ⅲ were synthesized by the reaction of ammonium phosphonodithioate or sodium phosphoro(di) thioiate with [(1,2,4-triazol-l-yl)-bromo]methyl aryl(or alkyl) ketone.Their structures were comfirmed by IR,1H NMR and elemental analysis.The primary biological test show that some of them have the activities of fungicide,herbicide or plant growth regulator,and the activities are independent on the substituents attached to Patom.
    Analysis of Volatile Oil of Aconitum Sungpanense and A. karakclicum var. patentipilum by GC/MS
    WANG Rui, CHEN Yao-Zu
    1992, 13(8):  1087-1089. 
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    The volatile oils of Aconitum sungpanense Hand.-Mazz.and Aconitum karakolicum var.patentipilum W.T.Wang were extracted by simultaneous distilation-extraction equipment made by ourselves.From the volatile oil of A.sungpanense,39 components were separated by capillary gas chromatography,of which 34 components were preliminarily identified by mass spectrometry.From the volatile oil of A.karakolicum var.patentipilum,42 components were separated,of which 26 components were identified.They have not previously been found in these species.
    Studies on Two New Triterpenoids from Astragalus Adsurgens Pall
    ZHENG Shang-Zhen, SUN Li-Ping, SHEN Xu-Wei
    1992, 13(8):  1090-1091. 
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    Two new triterpenoids have been obtained from Astragalus adsurgens pall.Their structures were elucidated by means of spectroscopic methods as (20R,24S)-3,16-dicar-bonyl-6α,25-dihydroxy-20,24-epoxy-9,19-cycloadsurgenin and (20R,245)-3,16-dicarbonyl-6α,25-dihydroxy-20,24-epoxy-23-nitrogen-9,19-cycloadsurgenin.
    The Synthesis of A Novel Amphiphilic Porphyrin and the Properties of LB Films
    LUO Yi, WU Xuan-Jie, CHEN Zhang-Ping, JIANG Zhong-Xing
    1992, 13(8):  1092-1094. 
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    The synthesis of a novel amphiphilic porphyrin(IV) containing a long aliphatic chain is detailed.The mono-and multilayers of porphyrin(IV) were prepared and the structure was studied by STM(Scanning Tunnelling Microscope).UV-Vis spectra and fluorescence spectra were recorded in the solution and in LBfilms.
    A Study of Spectra of Mo2I4(NCR)4 with Metal-Metal Multiple Bonds
    ZHENG Zhi-Ren, LI Zhi-Ru, LI Qian-Shu, LI Jun, FENG Ji-Kang
    1992, 13(8):  1095-1097. 
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    The electronic spectra of the cluster compounds,Mo2I4(NCR)4(R=Me,Et,Ph),with Mo≡Mo bond have been calculated by means of ZINDOdNDO/Cl) program.The wave numbers and the intensity obtained by the calculation are in agreement with the experimental values.In particular,the πd→σp-s(M) transition of the metal-metal multiple bond is found by analy-ing the states and molecular orbitals.In addition,the red shift of band Iof the system with R=Me,Et,Ph and the nature of Mo≡Mo bond are analysed.
    A Study of CuTsPc Molecular Film/SiO2/Si Interfacial Charge Transfer Mechanism
    JIANG Lei, Liu Wang, Wang De-Jun, Li Tie-Jin, Bai Yu-Bai, HAN Li, FEI Hao-Sheng
    1992, 13(8):  1098-1101. 
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    In this paper,two layers of lipid-free copper tetrasulfonatophthalocyanine(CuTsPc) molecular films were deposited on the surface of p-Si wafers on which the oxided layers with different thickness.Time resolved surface photovoltage technique was used to study the mechanism of the electron transfer process of this system.The samples show the behavior of photo-electronic switch.The results prove that time resolved photovoltage technique is very useful to the study of the interfacial charge transfer process.
    Investigation of Extraction Process by Titration Calorimetry(Ⅳ)——Formation of Reversed Micelle and Microemulsion in Extraction Organic Phase or Saponated P507
    LI Gai-Ling, LI Zhong, PENG Qi-Xiu, GAO Hong-Cheng, WU Pei-Qiang, ZHENG Rong
    1992, 13(8):  1102-1105. 
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    In the organic phase of saponated P507(2-ethylhexylphosphonic acid mono-2-ethyl-hexyl ester) the formation of reversed micelle and microemulsion in the process of titration with water has been studied by calorimetry method.The critical micelle concentration (CMC),aggregation number (n),formation constant(K) and thermodynamic function of micellization were determined.The hydro-dynamic radius of each droplet was also obtained by the laser light scattering experiment.
    Quantum Topological Study on the Changes of Chemical Bonds in 1,2-Dehydrogenation of Methylenimine
    MENG Ling-Peng, CAI Xin-Hua, ZHENG Shi-Jun, ZHAO Cheng-Da, CHEN Bin
    1992, 13(8):  1106-1108. 
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    After the reaction ergodography,the changes of chemical bonds in 1,2-dehydrogena tion of methylenimine were studied by means of topological analysis on the electron charge density.The breakage and formation of chemical bonds in the reaction path can be understood clearly from the topological properties at the critical points of these bonds.Our results present a further certification for the conclusion of the reaction which is cooperative but synchronous.Our work provides a new method for studying chemical reaction as well.
    Studies on the Radiolysis of Ethanol in γ-Irradiated Acrylic Acid-Ethanol System
    WEI Gen-Shuan, WU Ji-Lan, LU Xiao-Hong, HA Hong-Fei, ZHOU Yu-Rong
    1992, 13(8):  1109-1112. 
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    The G-values of main radiolytic products of ethanoi in the γ-irradiated acrylic acid-ethanol system were measured under lower absorbed dose.The results reveal that acetaldehyde mainly comes from the primary processes of the radiolysis of ethanoi but not from the dispropor-ticnation reaction of CH3CHOH;2,3-butanediol can be formed by recombinationn of CH3CHOHand its kinetic equation can be described as the following formula:G=G0—[k11/2(k10)1/2](G/K'D)1/2[AAH] k11(1.8×105 mol-1·s-1) can be obtained.Acrylic acid can scavenge Hand CH3CHOH in the system,which leads to the decrease of GH2 and G(CH3CHOH)2 Using competation reaction kinetics,we can get k4/k2=4.4×102
    Studies on the Localized Molecular Orbital Properties for Syn and Anti Isomers of Dinuclear Mo-S Clusters
    LI Song, LI Qian-Shu, TANG Ao-Qing
    1992, 13(8):  1113-1117. 
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    On the basis of summarization of structural properties of a series of cluster compounds with a core of [Mo2(μ-S)2Y2]2+ (Y=Oor S),the syn and anti isomers of typical compound were calculated by using the CNDO SCFand E-Rlocalization method.Their structures and bonding properties as well as the variety of Mo—Y(S) tribond with increasing the distance between Mo and Satoms were investigated.The inversion potential barrier between syn and anti isomers and the variance of molecular orbital properties were discussed.It is revealed that the molecular geometry factors play an important role in the formation of this barrier.
    Studies on the Redox Properties of Heteropolymolybdates with Transition Metals
    QIN Du-Jie, LI Jing, WANG Guo-Jia, WU Yue
    1992, 13(8):  1118-1121. 
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    The redox properties of heteropolymolybdates with transition metals,Na5[PM(H2O) Mo11O39]·nH2O(M=Mn2+,Co2+,Ni2+,Cu2+,Zn2+),in water-dioxane solutions were studied by using electrochemical method.We found the variation of the coordination circumstance would influence the half-wave potential (E1/2) of the heteropoly anions,and the extent of the influence depends on the properties of the inserted transition metals ions.The order of the polaro-graphic half-wave potential of the heteropolyanious substituted by transition metal ions is as follows,Ni2+>Co2+>Zn2+>Cu2+>Mn2+.The effect of Cu2+ ion on the redox properties of the heteropoly anions is discussed in detail.
    A New Technique for Evaluating the Standard Representation Matrices of Symmetric Groups
    WU Wei, ZHANG Qian-Er
    1992, 13(8):  1122-1123. 
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    A new technique for evaluating the standard representation matrices of symmetric groups is presented.A representation matrix for an arbitrary irreducible representation is given as the product of three matrices,where two of them are in triangular form,and are determined by the irreducible representation group,the other is made up of the elements which equal 1,0,or -1 according to some simple rules.
    Synthesis of Pseudo-Ionone Catalyzed by the Solid-Bases
    WENG Yu-Pan, WANG Fa-Yang, FU Jin-Yin
    1992, 13(8):  1124-1125. 
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    The macropore solid-base catalysts were successfully applied to the synthesis of pseudo-ionone from litsea cubeba oil and the continuous reaction was realized.These catalysts have high activities at low temperature,better selectivities,and long lifes.Thus,they have obvious economic and social benefits.
    Studies on the Oxygen Enrichment of Chitosan Membrane(Ⅱ)
    DING Jun-Qi, HE Xu-Min, ZOU Wei, XIA Hai-Ping, DING Ma-Tai, CAI Qi-Rui
    1992, 13(8):  1126-1127. 
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    The composite membranes of chitosan containing cobalt salt as the fixed oxygen carriers and polysulfone amide were obtained.The damp membrane can enrich oxygen from air,while dry membrane cannot.The effects of temperature,operating pressure and cobalt salt concentration on the behaviour of damp membrane were reported.
    EPR Studies on Electron Transfer Reactions Between Perfluoroalkyl Phenyl Ketones and Phenyl Magnesium Bromide
    MA Yan-Long, GONG Yue-Fa, ZHAO Cheng-Xue
    1992, 13(8):  1128-1130. 
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    EPR observations of the ketyl radical intermediates in the reactions of nine perfluo-roalkyl substituted-phenyl ketones with phenyl magnesium bromide in ether and THFreveal the electron-transfer nature of the process.The effects of the substituenta and solvent polarity on the reactivity are discussed.
    Effect of the Crystal Structural Morphology of CdS on the Photocatalytic Dehydrogenation Activity of Ethanol
    FANG Zhi-Min, ZHUANG Qi-Xing
    1992, 13(8):  1131-1133. 
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    The photocatalytic dehydrogenation of aqueous solution of ethanol on two types of CdSsupports with different crystal structures modified by either the chemically deposited Pd or mechanically mixed Pt was investigated.The crystal structural morphology of the CdSsemiconductor powders was determined by TEMand XRD.The relationship between the CdScrystal structural morphology and the dehydrogenation behavior of the catalysts was illustrated and the fact that the photocatalytic dehydrogenation of aqueous solution of ethanol is quite sensitive to the crystal structural morphology of catalyst support was confirmed.
    Adsorption of Tetradecylpyridium Chloride from Aqueous Solutions on Zeolite 4A
    ZHAO Zhen-Guo, WANG Zhi-Jie
    1992, 13(8):  1134-1136. 
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    The adsorption isotherms of tetradecylpyridium chloride (TPC) from aqueous solutions (before adsorption,pH 4～11) on zeolite 4Ahave been determined at 25℃.All the isotherms are of Langmuir type and similar ones.The result can be explained in that zeolite 4Ahas a quite large buffer ability,and pHvalues of the solutions before adsorption are close (pH 9～10).In the range of pH 8～10 the electroretic mobilition of zeolite 4A is a constant value.After adding NaCl and CaCl2,the adsorption of TPC in lower concentration decreases markedly and the kind of the isotherms can be transform into Stype.
    A Study of the Applicability of GPC Universal Calibration to Star Branched Polystyrene
    CHENG Shu-Yao
    1992, 13(8):  1137-1140. 
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    The applicability of universal calibration to star branched polystyrene was investigated by means of the apparatus of GPCcombined with a continuous viscorneter and a low angle laser light scattering photometer.The results show that the universal calibration is applicable to fractions of star branched polystyrene when their branched parameter g' (=[η]b/[η]l) is equal to or greater than 0.131z` but not to the higher branched fractions with g' <0.131.
    The Synthesis and Characterization of Chlorosulfonated Polyethyl ene/Pol ybutyl Methacrylate/Epoxy Resins Three-Component IPNs
    LI YAO-Xian, LIU Fu-An, WANG Jing-Yuan, LI Yu-Wei, TANG Xin-Yi
    1992, 13(8):  1141-1144. 
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    Three-component 1PNs from chlorosulfonated polyethylene/polybutyl methacrylate/e-poxy resins (CSM/PBMA/EP) were synthesized by combination of simultaneous synthesis with stepwise synthesis.The compatibility depends on the component ratio in the IPNs.When the component ratio of CSM:PBMA:EP is 1:2:1,interpenetrating entanglement extent between networks is larger and compatibility is better.The morphology of three-component IPNs from CSM/PBMA/EP was investigated by using stepwise staining method.The change of phase domain size and extent of phase separation of IPNs synthesized can be observed by different staining methods.
    Studies on Castor Oil/Methyl Methacrylate AB Crosslinked Copolymer
    FAN Shi-Xia, HAN Xiao-Zu, QIAO Qian, WANG Bao-Ping
    1992, 13(8):  1145-1148. 
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    Castor oil/methyl methacrylate ABcrosslinked copolymers (ABCP) with different compositions were synthesized by copolymerization of methyl methacrylate and vinyl-terminated castor oil which was obtained from maleic anhydride and castor oil.The dynamic mechanical properties,mechanical properties and morphology of the ABCPs were investigated.
    Studies on the Ionic Interaction in lonomer Solution by FTIR and ESR
    FENG Ke, OUYANG Wei, LI Zhuo-Mei
    1992, 13(8):  1149-1150. 
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    FTIR and ESR have been used to study the influence of the xylene/hexanol ratio on the cation-anion and cation-cation interactions in sulfonated EPDMionomers.FTIRresults show that the interaction between the solvated metallic ions and SO3- is in the order Li<Na<K,while for the ions without solvation the order is the reverse (Li>Na>K).The ESRspectra of SEPDM-Mn ionomers indicate that both isolated Mn2+ and Mn2+ cluster exist in the solution.The Mn2+ cluster is favored in less hexanol cosolvent and at high temperature,which is believed to be the reason for the viscosity increase of the ionomer solution with increasing temperature.
    Studies on the Kinetics of Acryl amide Polymerization Redox Initiated by Diperiodato-argentate(Ⅲ) Complex Ion
    LIU Ying-Hai, SONG Ming-Fang, HOU Ri-Sheng
    1992, 13(8):  1151-1152. 
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    The kinetics of acrylamide polymerization initiated by diperiodato-argentate(Ⅲ)[Ag (Ⅲ) was studied in alkaline medium.The results indicate that the equation of the polymerization rate is as follows:Rp=k[AM]1.21[Ag(Ⅲ)]0.90 and the overall activation energies of AM polymerization are 48.5kJ/mol.The polymer molecular weight decreases with increasing Ag(Ⅲ).The effects of reaction conditions on the polymerization rate were also studied.The initiation mechanism was proposed.
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