Loading...
CJCU

Table of Content

    24 July 1985, Volume 6 Issue 7
    Previous Issue    Next Issue
    Articles
    Preparation and Properties of Acetylacetonate 5,10,15, 20-Tetra-(p-Chlorophenyl) Porphyrin Rare Earth Complexes
    Liu Guofa
    1985, 6(7):  569-572. 
    Asbtract ( )   PDF (308KB) ( )  
    Related Articles | Metrics
    Acetylacetonate-5,10,15,20-tetra-(p-chlorophenyl) porphyrin rare earth complexes Ln (p-Cl) Tppacac (Ln:Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb and Lu) have been synthesized by the direct reaction of (p-Cl) Tpp with Ln(acac)3·3H2Oin1,2,4-trichlorobenzene.Their properties were discussed simply.
    The Crystal Structure of 3,5-di-Br-PADAT
    Shi Kailiang, Huang Shenghua, Qian Jinzi, Yao Jiaxing, Fan Haifu
    1985, 6(7):  573-576. 
    Asbtract ( )   PDF (267KB) ( )  
    Related Articles | Metrics
    5-[(3,5-di-Bromo-2-Pyridyl) Azo]-2,4-diaminotoluene(3,5-di-Br-PADAT) is a highly sensitive and selective reagent for cobalt and copper. The single crystal belongs to space group P21/n with lattice parameters. a = 11.477(5)Å, b= 15.642(6)Å,c = 8.311(4)Å,α= 110.54(4)° and 4 molecules in the unit cell. The intensities of 1960 independent reflections were collected using the PW-1100 four-circle diffractometer, The structure was solved with patterson method and heavy-atom method and refined to a final R= 0.0611 by full matrix least square method.
    Studies on the Rare Earth Complexes on Pyridine Derivatives and Their N-Oxide (Ⅰ)——The Synthesis and Properties of the Complexes of Praseodymium, Neodymium and Samarium Chlorides with 2, 2'-Bipyridine-N, N'-Dioxide
    Tan Minyu, Tang Ning, Zhai Yingli, Qiu Jiabin
    1985, 6(7):  577-582. 
    Asbtract ( )   PDF (444KB) ( )  
    Related Articles | Metrics
    The solid complexes of trivalent rarc earth (Pr, Nd, Sm) chlorides with 2, 2'-bipyridine-N, N'-dioxide were prepared. The mole ratios of Ln to bipyO2 in the complexes are 1:1, 1:3, 1:4 respectively. They were characterized by elemental analysis, X-ray diffraction, infrared spectra, thermogravimetric (TG) and differential thermol analyses (DTA), as.well as molar conductance studies.
    The Study on the Sensitization of Surfactant on the Fluorescence Reaction of Tb-Tiron and Its Analytical Application
    Cui Wancang, Mi Li, Shi Huiming
    1985, 6(7):  583-586. 
    Asbtract ( )   PDF (325KB) ( )  
    Related Articles | Metrics
    The scnsitization of CTMABon Tb-Tiron fluorescence reaction was investigated. The optimum reaction conditions and the composition of the complex were established. The comparisons with seven fluorescence reaction of Tb show that the sensitivity of the Tb-Tiron-CTMABreaction is the highest. The content of Tb in the synthetic samples of rare earths was determined with satisfactory results.
    Time Shifts of Absorption Signal and the Formation of Double Peaks for Lead in Graphite Furnace Atomizer
    Zheng Yansneng, Liu Yansneng
    1985, 6(7):  587-590. 
    Asbtract ( )   PDF (305KB) ( )  
    Related Articles | Metrics
    In the paper, the reasons for the time shifts of absorption signal and the formation of double peaks for lead in graphite furnace atomizer are described and the atomization of lead to be affected by partial oxygen pressure near the tube wall in graphite furnace is discussed as well. The experiments show that Mg, Ca, Na, Fe and Cu chlorides can cause the depression of absorption signal for lead in varying degrees,and the influence of chloride matrices on lead was mainly in the solid phase and the process of vaporizing sample.
    Solvation Effects of Organic Solvents on Colour Reactions of Multiconlponent Complexes of Scandium
    Ci Yunxiang, Yang Ruomin, Xiu Xiaoling, Tian Xiaoqing, Zhang Giughua, Li Li
    1985, 6(7):  591-597. 
    Asbtract ( )   PDF (517KB) ( )  
    Related Articles | Metrics
    The solvation effects of organic soivcnts(methol alcohyl,ethyl alcohol,n-propanol, isopropanol, acetone, dimethyl sulfoxide, dimelhylformamide and dioxane)on colour reactions of multicomponcnt complex (MCC) of scandium with chromazurol-S(CAS) and long chain cation surfactants have been systematically investigated.The sensitivity and selectivity of the colour reactions of MCCof scandium can be markedly improved by the solvation effects of organic solvents. The molar absorptivity of the complex Sc-CAS-OtTABis 1.4× 105 l/mol·cm in the absence of organic solvetn, but it (e) can be risen to 3.2× 105 l/mol·cm in the presence of methyl alcohol or dimethyl formamide. The new highly sensitive and selective colour reactions have been developed as a method for the determination micro amounts of scandium in rare earth oxide and in fcrritc of lanthanum and scandium. The composition of MCCof scandium and its solvation number were determined. The mechanism of the solvation effect has been discussed.
    The Analytical Application of Water Insoluble Porphine (Ⅰ)——The Spectrophotometric Study on the Reaction Between Copper and a,α,β,γ,δ-Tetra- (4-Dimethylaminophenyl)Prophine
    Huang Zexing, He Shuqing, Xu Xiulian, He Yuhang
    1985, 6(7):  598-600. 
    Asbtract ( )   PDF (179KB) ( )  
    Related Articles | Metrics
    In this paper, the complex reaction of α,β,γ,δ-letra-(4-dimethylaminophenyl) porphine[T(4-DMAP)P]with copper (Ⅱ) in the presence of anionic surfactant, sodium dodccyisulfat and small amounts 01 hydroxylamine has been studied. The water insoluble porphine was found to be a new highly sensitive and highly selective reagent for the direct spectropholometric determination of the ultramicro amount of copper.
    A Study on the Method of Identification to NO3- and NO2- by Means of Phenolic Reagents
    Zhou Rengong, Liu Zhaoming
    1985, 6(7):  601-602. 
    Asbtract ( )   PDF (160KB) ( )  
    Related Articles | Metrics
    In this article, the new methods of identification to NO3- and NO2- by means of phenolic reagents were studied.
    Study on the Derivatives of N-Phenylphosphonothioylamino Acids and N-Phenylphosphonothioylglycine Ethyl Esters
    Chen Ruyu, Fang Iianxing
    1985, 6(7):  603-608. 
    Asbtract ( )   PDF (450KB) ( )  
    Related Articles | Metrics
    Forty-two new organic phosphorus compounds have been prepared. In the synthesis of derivatives Ⅱ and Ⅲ, a simplified procedure has been used by the modification of the methods reported in literature. The by-product with the formulas phP(S)(NHCH2COOC2H5)2 and phP(S)(OR)2(R = ο-NO2C6H4, 2-NO2-4,5-(CH3)2C6H2, 2,4,5-Cl3C6H2) have been isolated from the react mixture of some of derivatives Ⅱ. The preliminary tests for the biological activities of derivatives Ⅰ, Ⅱ and Ⅲ and the stability of derivatives Ⅱ in alkaline and acidic solutions have been carried out.
    A Minor Alkaloid from the Extract of Ephedra Herbs
    Cheng Dongliang, Wang Dongmin, Li Shi, Chu Tsetsin
    1985, 6(7):  609-612. 
    Asbtract ( )   PDF (272KB) ( )  
    Related Articles | Metrics
    Aminor alkaloid was isolated from the extract of Ephedtra herbs. It has been identified as O-bcnzoyl-L(+)-pscudoephcdrinc(Ⅳ) by spectral analysis of IR,PMR, MSand synthetic authentic sample.
    Studies on Organoactinide Compounds (Ⅱ)——Synthesis and Structural Characterization of Some New Substituted Thorocene
    Wang Xukun, Streitwieser, A. Jr.
    1985, 6(7):  613-615. 
    Asbtract ( )   PDF (244KB) ( )  
    Related Articles | Metrics
    Three new substituted Thorocenes-1, 1'-dimesitylthorocenc, 1, 1'-di-o-toiyl-thorppene and 1, 1'-di-cyclooctatetraenylthorocene-were synthesized and characterized. There was improved the preparation of 1, 1' -di-t-butylthorocene and measured the UVabsorption spectrum of this thoroccnc.
    Study on 1H NMR Spectra of Heterocyclic Compounds Containing Iodine
    Song Maosen, Yang Chengxi, Kong Suling, Hou Zijie, Ma Bin, Huang Wenwei
    1985, 6(7):  616-618. 
    Asbtract ( )   PDF (211KB) ( )  
    Related Articles | Metrics
    This paper reports for the first time 1H NMRspectra of 19 kinds of iodinatcd compounds and iodonium heterocyciic compounda. In this paper, the Laciors affecting aromatic proton chemical shifts, such as the type of subsiitutnts, the solvent and nature of the counter ion arc discussed. Contribution of the iodonium substituent to the chemical shift increments of aromatic o-,m-,and p-protons is discussed, too.
    Synthesis of 10π Aromatic Benzoheterocyclic Compounds
    Cui Yongfang, Hojo, M., Masuda, R., Okada.A.
    1985, 6(7):  619-620. 
    Asbtract ( )   PDF (165KB) ( )  
    Related Articles | Metrics
    Aromatic ortho-diamine can react as a nucleophile with trans-trifluoroacetyleth-oxyethylene to give a bis(N-trifluoroacetylethenyl)-substituted diamine, which in turn gives 10π aromatic benzoheterocyclic compounds through dehydration-cyclization. The reaction mechanism and structure characterization are presented.
    Studies on Thermokinetics(Ⅰ)——Theory and Methods of Thermokinetics
    Deng Yu
    1985, 6(7):  621-626. 
    Asbtract ( )   PDF (411KB) ( )  
    Related Articles | Metrics
    Tian's equation is taken as a theoretical model of conduction calprimerer, and the changing states of a reacting system is described with the extent of reaction. And then thermokinetic equations of the whole system (thermokinetic system) have been derived in the light of nonequilibrium thermodynamics.The rate law of a thermokinetic system and analytical expressions of thermokinetic curves can be derived from the thermokinetic equations respectively. On this theore-tical basis, a new studying method of thermokinetics has been suggested in this paper.
    A Study on the Oxidation-Reduction Characteristic of the Mo-Fe-S Ternary Clathrate Compound
    Huang Chubao, Guo Chunxiao, Zhang Zhigui, Xu Lijuan
    1985, 6(7):  627-631. 
    Asbtract ( )   PDF (393KB) ( )  
    Related Articles | Metrics
    The cxidalion-rcduclion characteristic of the ternary clathratc compound {Mo[S2CN(C2H5)2]4}+{FcCl4}-{(C6H5CH2S)2 was studied by electrochemical measurment in combinaticn with quantum-chemical calculations. The cyclic voltam-mogram of this ternary clathrate compound in 0.1 M KClO4-DMFwith a platinum electrode was seen to have 2 pairs of oxidation-reduction peaks. Both the electrochemical parameters derived from the voltammogram and the results of EHMOcalculalions indicate that the pair of oxidation-reduction peak at relatively positive potentials corresponds to the oxidation-reduction reaction of Fc(Ⅲ)/Fe(Ⅱ) which is irreversible in nature, while the pair of oxidalion-reducticn peak at more negative potentials corresponds to the oxidation-reduction reaction of Mo(Ⅴ)/Mo(Ⅳ), which is scmircvcrsible. the calculations from experimental measurements are fairly in agremcnt with the theoretical calculalions.
    Determination of the Graft Degree on the Silica Gel Surface for Chromatographic Carrier
    Wang Qinwei, Duan Xiaoqing, Qian Jiuxin
    1985, 6(7):  632-636. 
    Asbtract ( )   PDF (388KB) ( )  
    Related Articles | Metrics
    Ascries of silica gel packing materials are prepared by bonding organic silane on the silica gel surface with different concentrations of γ-glycidoxypropyltrimethoxy silane water solutions. The graft degree of the bonded phase on these silica gelssurface arc determined by using three methods——Thermal Analysis, ElementAnalysis, and absorption in solution. The results indicate that TAis a suitable method for characterizing the graft degree of the bonded phase of these modified silica gels.
    Theory of Gas-Phase Acidity (Ⅰ)——Correlation of Deprotonation Energy with Hydrogen Charge
    Chen Zhixing
    1985, 6(7):  637-641. 
    Asbtract ( )   PDF (355KB) ( )  
    Related Articles | Metrics
    The charge distributions of various acids and their conjugate bases arc calculated by using CNDO/2 and MNDOwith full geometry optimization. The deprotonalion energy is found to be better correlated with the charge on the acidic hydrogen than with the charge on the atom linking to the hydrogen and with the charge on the neucleophilic atom of the conjugate base. This shows that the charge on the acidic hydrogen has an important effect on acidity, whereas the effect of the charge on the linking atom and on the neucleophilic atom of the conjugate base is not imporant. It can thus be deduced that the view of stabilization of the anion due to spreading the negative charge is not the significant explanation of acidity.
    Relationship Between the Total π-Electron Energy Eπ and the Random Closed Walk S2
    Feng Xinghong
    1985, 6(7):  642-646. 
    Asbtract ( )   PDF (315KB) ( )  
    Related Articles | Metrics
    In this paper, the random closed walk of several different conjugated hydrocarbons is discussed. Some necessary conditions for the coefficients of Eπ expansion formula are obtained.
    Local Symmetry for Conjugate Polymers Molecular Orbital Theory on Chain Conjugate Polymers(Ⅰ)——Two Types of Factorized Eigenequation Using Local Symmetry for Chain Conjugtte Polymers
    Yang Zhongzhi, Ye Yuanjie, Tang Au-qing
    1985, 6(7):  647-648. 
    Asbtract ( )   PDF (157KB) ( )  
    Related Articles | Metrics
    For two types of straight chain conjugate polymers, the factorizcd representations of HMO cigenequations have been found by using difference equation method and local symmetry. The periodic factor-angular frequency is determined. The results obtained arc described by two theorems.
    The Energy Level of Condensed Aromatic Molecule
    Wang Rongshun, Sheng Gang, Zhao Chengda
    1985, 6(7):  649-651. 
    Asbtract ( )   PDF (198KB) ( )  
    Related Articles | Metrics
    In this paper the discussion of the energy levels on straight chain and single ring congujate molecule with difference equation method is improved. Adifference equation method of the simplified molecular orbitals was proposed for calculating energy levels of condensed aromatic molecules.
    Coil Properties of Ring Shaped Polymer Chains (Ⅱ)——Sedimentation Coefficient of Ring Shaped Polymer
    Huang Jiaxian, Li Chunrong, Liu Quanli, Wang Linfu, He Binglin
    1985, 6(7):  652-656. 
    Asbtract ( )   PDF (342KB) ( )  
    Related Articles | Metrics
    This work investigates the correlation equation of [η],/[η] with S0r /S0l and D0r/D0l and verifies the relationship between the [η],/[η] and S0r/S0l through experimentation.
    Synthesis of a Series of Star Polystyrenes Having the Same Length of Branch Chain
    Wang Jian, Wang Qinwei, Yang Meilin, Shen Jiacong
    1985, 6(7):  657-659. 
    Asbtract ( )   PDF (240KB) ( )  
    Related Articles | Metrics
    Aseries of star polystyrenes having the same length of branch chain and different degree of branching 3, 4, 6, 8, and 12 have been synthesized with poly-functional chlorosilane as the linking agent through anionic oplymerization in the system of s-BuLi/bcnzcne. The results of synthesis were analyzed with GPCand Ubbelohde viscometer.
    Study on the Dicationically Living Tetrahydrofuran- Propylene Oxide Copolymer Chains
    Meng Xiansheng, Zhang Hongzhi, Feng Xinde
    1985, 6(7):  660-661. 
    Asbtract ( )   PDF (207KB) ( )  
    Related Articles | Metrics
    The living chains were obtained in bulk tetrahydrofuran-propylene oxidc(PO) (10-20wt%) copolymerization initiated by adipoyl chloride(Ac-AgClO4, [Ac]0 = 0.02-0.09mol·l-1) catalyst at -10-0℃ without both chain termination and fransfer reactions.
Special Issues
More...
Download
More...
Links
More...