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    24 February 1986, Volume 7 Issue 2
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    Articles
    Study of Lanthanide Nitrate (Ln=La and Pr) Complexes of 4-Methyl-5-Bromo-Benzo-15-Crown-5
    Jin Linpci, Ren Liping, Chen Botao, Huang Liangbao
    1986, 7(2):  95-99. 
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    In this paper the synthesis and characterization of a new crown ether 4-methyl-5-bromo-benzo-l5-crown-5 arc described. The crown ether complexes of lanthanide nitrates (Ln = La and Pr) have been investigated by means of elementary analysis, DTAand TGdetermination, UV/VIS, 1Rand 1H NMR. 1Rdata show that coordination number of the complexes is 11.
    Synthesis and Characterization of a Novel Type of A1PO4 Molecular Sieves CFAP-2
    Long Yingcai, Dong Lingzhen, Gao Zi
    1986, 7(2):  100-104. 
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    Anovel type of A1PO4 molecular sieves named CFAP-2 was synthesized hydrothermally in a TMEDA (tctramethylethylenediaminc)-P2O5-Al2O3-H2Osystem at 200℃.The mole ratio composition of reactant was TMEDA:P2O5 :Al2O3 :H2O=(1 - 1.1) : 1:1: 50. Studies of crystal morphology, X-ray powder diffraction analysis, thermoanalysis and infrared spcctroscopy lead to the conclusion that CFAP -2 is different from AlPO4-21 in crystal structure. Transformation of the original product into more stable crystal phase with porous 3-dimensional framework occured at 350℃. The free dimension of the adsorption window of CFAP-2' is between4.4-4.9Å.
    Studies of Complexes of Schiff Bases Containing Sulfur (Ⅰ)—S-Methyl-β-N- (o-hydroxyphenylethylidene) -Dithiocarbazate Complexes with Nickel and Copper
    Dai Huan, Qian Keping, Ou Zhaohua, Zhu Zhonghe, Chen Hanwen, Wang Yijun, She Xizhao
    1986, 7(2):  105-108. 
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    The coordination compounds of nickel and copper with S-methyl-β-N-(o-hydroxyphenylethylidenc)-dithiocarbazate have been synthesized and characterized by elemental analysis, molar conductance and IRspectroscopic measurement.
    Study on the Complexation of Ti(Ⅳ)-Carboxylic and Hydroxy Carboxylic Acid by Metallic Indicator Method-UV Spectroscopy
    Qiu Liag, Jia Doagfang, Sun Qiaoya
    1986, 7(2):  109-115. 
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    The relative Complexing ability of 10 sorts of carboxylic acids with Ti(Ⅳ) at pH=1.50 was studied using chromotropic acid as metallic indicater. By treatment of the spectral absorption data with a formula derived by the author, the relative complexing ability can be calculated quantitatively as follows:Oxalic acid (100)>D-gluconic acid (8)>Citric acid(33)>Glyceric acid(16) >Lactic acid(11 ,5)>Tartaric acid (10)>Succinic acid(8.4)>Acetic acid(7)>Ma-lonic acid(6)>Malic acid(l.7).The UVspectra characteristics and the way of band formation of Ti(Ⅳ)—carboxylic and Ti( Ⅳ )-hydroxycarboxylic acid were studied and discussed.According to the magnitude of λmax , the relative stability series of the chemical bond between the Ti( Ⅳ) and the ligands from 6 sorts of hydroxy,, carboxlic acids in the interval of pHfrom 1 to 2 was established.
    Selection of Buffers in Spectrochemical Analysis of Rare Earth Elements and a Research into Its Function
    Wei Jizhong, Qi Lu
    1986, 7(2):  116-120. 
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    The effects of some cations and anions on the intensities, the stabilizing of the arc temperature as well as the securing of a smooth burn were investegated systematically.This paper discoursed upon the effect of cations on diffusion coefficient and the influence of spectral buffer on the arc temperature.This investegation indicated that the effect on transit time and diffusion coefficient is very remarkably. It can be noticed that the transit time relates to the inoization, potential of the atoms of metals and their atomic weight.
    A Study on Fluorescence System of Terbium- Imino Diacetric Acid-Tiron-Surfactant
    Zhu Guiyun, Yang Jinghe, Xu Shiyao, Niu Yantao
    1986, 7(2):  121-124. 
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    The tetrabasic ion associate formed by terbium with imino diacetric acid, tiron and surfactant can been used as the basis of a spectrofluorimetric determination of terbium. The sensitivity of it was 12 times as high as that with absence of surfactant CTMAB.The influence of 10 surfactant and 7 complexones on fluorescence intensity was also studied.
    The Application of Ion-Selective Electrode to the Complexation Titration —Comsecutive Potential Titration of Iron, Aluminium and Titanium
    Li Jing, Kuang Shumin, Chai Qihua
    1986, 7(2):  125-126. 
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    The present paper describes the consecutive potential titration of iron, aluminium and titanium in a single sample solution by copper ion-selective electrode. The method is simple and accurate, and there needs no separation. The reproducibility is high and the method is satisfactory to analyse various silicates.
    Studies on Stripping-Catalytic Process of Palladium
    Xu Hongding, Guo Yinglan
    1986, 7(2):  127-131. 
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    In this paper, the following facts are described, during the electro-depositing of Pd(Ⅱ) with Hg(Ⅱ) on the glassy carbon electrode, an electro-active compound between metals, Hg2-Pd, was formed. When it was stripped, Pd showed a stripping process involved two electrons and two chrolide ions with irreversibility. The electrode with Hg2Pd was scanned in forward positive potential in a base-solution containing HClO4-HCl-SnClsub>2. The stripping catalytic pcak current obtained was related to the concentration of Sn(Ⅱ) and Cl-.
    Synthesis of Multidentate Ligand( Ⅱ)—Synthesis of Bis-Schiff Bases from 5-R-2-Methoxy-Isophthalaldehyde
    Hu Yaofei, Hu Hongwen
    1986, 7(2):  132-136. 
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    From 5-R-2-methoxy-isophthalaldehyde ( R = CH3, C6H5, OCH3, Cl, Br) and o-aminophenol were synthesized five new bis-Schiff bases, which form binuclear complexes with Gu( Ⅱ ) salts.5-R-2-hydroxy-isophthalaldehydes (R = CH5,OCH3, Cl, Br) were obtained by decomposing the Cu( Ⅱ ) complexes with dilute hydrochloric acid. Therefore the methoxyl group in the ligands was demethylated in the course of complex formation.
    The Primary Attempt of α-Acylcycloketone Alkylation and the Synthesis of α-Furanidin-2-Ylenecyclo-Pentanone and Hexanone
    Li Liangzhu, Zhang Xusheng
    1986, 7(2):  137-140. 
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    Intramolecular alkylation of α-4-chlorobutyrylcyclopentanone and α-4-chlorobu-tyrylcyclohexanone easily occurs at oxygen to form α-furanidin-2-ylenecyclopentanone and α-furanidin-2-ylenecyclohexanone, respectively, but the corresponding C-alkyla-tion does not take place. The C-alkylation of the related α-acetylcycloketones also hardly takes place and they are converted to the corresponding keto-esters with EtONa-EtOH.
    Studies on Organoarsonium Gompounds(Ⅸ)—The Reaction of Arsonium Ylides With Aromatic Amines and Substituted Benzaldehyds
    Tao Wentian, Li Jiazhen
    1986, 7(2):  141-143. 
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    Reaction of 2-Furanylacylmethyltriphenylarsonium bromide (1) with excess substituted anilines and 1 (or 2)-naphthylamine in N,N-dimethylaniline gave correpon-ding 2-(α-Furanyl)-indoles(2a-d) and 2-(α-Furanyl) benzidole derivatives (3 snd 4). α-Furanylacylmethyltriphenylarsine reacted with substituted benzaldehyds to form corresponding olefin derivatives in high yield. The structures of the products were determined by elemental analysis, colour test, IRand 1H NMR.
    Study of 1,2,4-Triazines—The Synthesis of 3-Methymercapto-5-Substituted Amino-1,2,4-Triazine-6-Carboxylic Acid Derivatives
    Cao Zhiquan
    1986, 7(2):  144-146. 
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    Ethyl-3-methylmercapto-5-hydroxy-1,2,4-triazine-6-carboxylate was treated in dry ice with Tscl to form ethyl N4-(5'-(3'-methylmercapto-6'-ethylcarboxylate)-1' ,2/,4/-triazinyl)-3-methylmercapto-5-oxo-4,5-dihydro-1 , 2,4-triazine-6-carboxy-late(Ⅳ).Compound (Ⅳ) reacted with a series of aliphatic and aromatic amines in etha-nol, and Ⅳa-b, Ⅶa-b, Ⅷa-c and Ⅸa-c were obtained respectively.
    The Interaction Energy of Insulin Dimer Molecule
    Wen Yuankai, Shao Jun, Li Zhengmin
    1986, 7(2):  147-150. 
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    In this thesis, the interaction energy of insulin dirtier molecule has been calculated and analysed.
    Synergism of Sodium Alkyl Benzene Sulfonate and Polyethoxylated n-Dodecyl Alcohols with Different Polyoxyethylene Chain Length Distribution
    Xia Jiding, Hu Zhengyu
    1986, 7(2):  151-155. 
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    The interactions between nonionic and anionic surfactants in three systems consisting of polyethoxylated n-dodecyl alcohols with different polyoxyethylne(POE) chain length distribution and sodium alkyl benzene sulfohate (SABS) were studied. Thermodynamics of mixed micellization and mixed adsorption were discussed on the basis of regular solution theory. The results indicate that the application of the theory in multi-component system is reasonable and that the calculated results are in good agreement with those obtained from experiments. The maximum synergism with respect to mixed micelle concentration and surface tension reduction of the aqueous solutions was found to be at the same mixing ratio of n-C12En to SABS, By adding the small quantity of C12En to SABSthe solubilization of SABSto ethylbenzene and the detergency can be increased obviously.
    Kinetics of Decomposition of Cyclohexyl Hydroperoxide in the Presence of Vanadyl Dibenzoylmethane
    Zhan Zhengkun, Wan Xueshi
    1986, 7(2):  156-160. 
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    The kinetics of decomposition of cyclohcxyl hydroperoxide (CHHP) in benzene catalyzed by vanadyl dlbenzoylmethane VO(dbm)2 has been studied. It is found that the products of decomposition of CHHPare cyclohexanol and cyclohexanone, which are produced in about equimolar quantities, and that one of the products cyclohexanol obviously inhibits decomposition of CHHP.
    Study on Solid Super Acid Catalyst of SO42-/MxOy Type
    Tang Xinshuo, Kong Fangming, Zhang Lining, He Xiao, Wang Fanglin, He Wcilian, Xi Limin
    1986, 7(2):  161-166. 
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    Anew SO42- /ZrO2-Fe2O3 solid super acid had been synthesied and iis composition and catalytic properties were systematically studied.According to its IRdata, the acid site of producing super acid was discussed and a new viewpoint was suggested, the data 1040-1080, 1130-1150, 1200-1280cm-1 were considered as its three characteristic IRadsorption peaks.The catalytic properties and characteristics of SO42-/TiO2 solid super acid were also systematically studied.
    The Spectra and Fine Structure of Energy Level of TbP5O14
    Tang Zhuoran, Bai Yubai, Li Tiejin, Zhao Yongnian
    1986, 7(2):  167-170. 
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    in this paper the fine fluorescence and infrared absorption spectra of TbP5O14 are reported and the fine structure energy levels arc determined.
    The Applications of WO2.90 in the Oxidation of Alkenes
    Cai Xiane Yu Lianmin, Zhu Jing, Zhuang Chengquan, Wang Xun
    1986, 7(2):  171-173. 
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    WO2.90 , with a larger specific surface area of 30m2/g, was preparated by the method of "Inner Reduction". When it was applied to the oxidation of cyclo-hexcnc, selectivity for benzene was more than 95%. This was a second order reaction with an approximate activation energy of 57kJ/mol. Acrolein was formed at 300℃ in the catalytic oxidation of propylene, and the yield was 3.7% at 450℃. It was found that there was only one adsorpted state of propylene on the surface of WO2.90 and desorption take place at a maximum temperature of about 360Kby TPDmethod. This desorption was a first order reaction with an approximate activation energy of 41 kJ/mol.
    A Study on the Nature of the Cathodic Passivating Film in the Process of Reduction of Chromic Acid
    Jiang Lincai
    1986, 7(2):  174-176. 
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    Atypical cathodic passivating phenomenon occurring at vitreous carbon electrode in the chromic acid solution was observed. At potentials after the cathodic reduction peak of Cr(Ⅵ) the potential sweep shows clear evidence for the formation of a strongly passivating film. It is confirmed that the presence of anions such as Cl-, NO3-, SiF42-, SO42- causes the reactivation of the electrode surface, though another narrow passivating region reappears at potential just prior to metal deposition. The nature of the passivating film was discussed.
    Studies on Surfaces of Polyurethane Films
    Deng Zhuo, Cao Jianwei
    1986, 7(2):  177-181. 
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    The surface energy of segmented polyurethanes(SPU) with different bulk compositions was measured through contact angles and their surface compositions were determinated by ESCA. The results show that these SPUs are the same in surface energy in spite of their different bulk compositions. This phenomenon was explained qualitatively in terms of the enrichment of soft segments on surface and the fact that the ratios of hard segment to soft segment are the same among the SPUs with different bulk compositions. The surface energy values of SPUs are higher than that of PTMGwith infinite molecular weight, perhaps this is due to the existenceof polar groups such as -O-C-NH- on SPUs surfaces.
    The Study on Dynamic Mechanical Properties of SIS Star-Shaped Block Copolymer
    Wang Jiaa, Liu Jingjiang, Shen Jiacong
    1986, 7(2):  182-186. 
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    In this paper we reported the dynamic mechanical properties of series of SIS Star-shaped block copolymer measured by Rheovibron Viscoelastometer, which have the same composition, the same molecular weight of branch chain, but different degree of branching as well as the same degree of branching but different molecular weight of branch chain. We observed that the molecular weight of branch chain has serious influence on glass transition temperature for each phase and dynamic Young's moduli E', but the degree of branching has minor influence on glass temperature and evident influence on E'.
    Influence of DSPP γ-Al2O3 on the Electrical Conductivity Poly(Ethylene Oxide)-NaSCN Complex
    He Yuankang, Chen Zhusheng, Zhang Zhiyi, Wang Chaoying, Chen Liquan
    1986, 7(2):  187-189. 
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    The PEO-NaSCNis used as a matrix and the γ-Al2O3 is taken as dispered second phase particles (Dspp). The conductivity in PEO-NaSCNis increased by the addition of Dspp and When the y-Al2O3 and the PEO-NaSCNis in the ratio of 30 to 100, the maximun appears. The conductivity of PEO-NaSCNis five times of magnitude higher than that of the PEO-NaSCNat room temperature. Then with the increasement of the(γ-Al2O3) content the conductivity of it decreases rapidly.
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