Loading...
Toggle navigation
CJCU
Home
About Journal
Editorial Board
Editorial Board
Youth Executive Editorial Board
Editorial Introduction
Guide for Author
Journal
Forthcoming Articles
Asap
Current Issue
Archive
Most Download Articles
Most Read Articles
Most Cited Articles
Email Alert
RSS
Subscription
Contact Us
中文
Table of Content
24 September 1987, Volume 8 Issue 9
Previous Issue
Next Issue
Articles
Studies on the Interfacial Properties of Liquid-Liquid Extract ion(Ⅲ)--Interfacial Properties of Primary Amine N
1923
in the Extraction Systems
Gai Haifa, Gao Zili, Sam Sixiu, Shea Jiaglan
1987, 8(9): 767-772.
Asbtract
(
)
PDF
(405KB) (
)
Related Articles
|
Metrics
The iaterfacial adsorption characteristics of primary amine N
1923
in liquid-liquid extraction systems have been studied. It may be concluded from the experimental results that N
1923
is adsorbed at the interface in the form of single-molecule. The adsorbability depends on the temperature and the nature of diluents. The experimental results showed that the weaker the polarity of diluent, the stronger the adsorability, and the higher the temperature, the weaker the adsorability. The influence of the aqueous medium concentration on the interfacial adsorption characteristics is not very obrioas. The relation between the adsorption properties of N
1923
and its extractability also discusied.
Study on the U(Ⅳ)-U(Ⅵ) Redox Displacement Chromatography (Ⅵ)--Cationic Ion Exchange Bed-Ti(Ⅲ)-FeCl
3
-Carboxylic Acid System
Qiu Ling, Chen Jingren, Zhang Minquan, Zhang Wenbo
1987, 8(9): 773-778.
Asbtract
(
)
PDF
(389KB) (
)
Related Articles
|
Metrics
Cationic ion exchange U(Ⅳ)-U(Ⅵ) redox displacement chromatography with citric, tartaric lactic, succinic,iminodiacetic acid and acetylacetone as complex agent was studied. The possibility and way to obtain high enrichment factor of uranium isotope separation as carboxylic acid is used as complex agent was mainly dealted. From the results it may be expected to increase the enrichment factor to (8.5-9.0)×10
-4
, approaching the level offered by ion exchange process, if carboxylic acid is correct selected and its concentration as well as displacement ion concentration are properly controlled.
Ternary Complexes of Ce(Ⅳ) and Th(Ⅳ)
Zhu Wenxiang, Yin Shouyi, Zhao Jizhou
1987, 8(9): 779-783.
Asbtract
(
)
PDF
(273KB) (
)
Related Articles
|
Metrics
Two ternary complexes of Ce(Ⅳ) and Th(Ⅳ) were isolated. Their properties have been studied with conductometry, thermal analysis and absorption spectro-scopy. FT-IR difference spectrum technique was also employed in examination of the complexes.
A Study on the Oxidation-Reduction Characteristic of the Bimolybdenum Complex Compound
Sun Wentao, Zhang Zhigui
1987, 8(9): 784-786.
Asbtract
(
)
PDF
(191KB) (
)
Related Articles
|
Metrics
The cyclic voltammogram of bimolybdenum complex compound is reported. It is shown that there are a pair of redox peaks and one reduction peak in the cyclic voltammogram. The results indicate that the redox peak pair is corresponding to the redox reaction of Mo[S
2
CN(C
2
H
5
)
2
]
4
+
, which is semireversible, but another reduction peak is corresponding to the reduction reaction of MoCl
6
-
, which is irreversible.
A Selective Determination of Molybdenum in the Presence of Large Amount Tungsten by the Difference of Solutional State
He Xiwen, He Huarui, Shi Huiming
1987, 8(9): 787-792.
Asbtract
(
)
PDF
(479KB) (
)
Related Articles
|
Metrics
A simple selective spectrophotometry has been developed for determination of molybdenum in the presence of tungsten based on the difference of polymeric behavior and complex ability. In the present paper, it is demonstrated how increase difference of solutional state between molybdenum and tungsten. It has been found that the method do not affect the absorbance of complex by forming molybdenum with bromopyrogallol red (BPR) but the complex of tungsten would almost become to fide.The method was applied to determine the micro amount of molybdenum in the tool steel with Satisfactory results.
Homogeneous Voltammetric Immunoassay of Diphtheria Toxoid and Diphtheria Antitoxin
Hu Yinhua, Tie Feng, Li Qingman
1987, 8(9): 793-796.
Asbtract
(
)
PDF
(288KB) (
)
Related Articles
|
Metrics
Diphtheria toxoid is denatured in 0.1M NE
4
Cl-NH
3
·H
2
O basal solution with pH9.4, yielding a cathodic and an anodic polarographic peaks at-1.50 and-1.46 V(vs.SCE) respectively.The cathodic and anodic peak heights vary linearly with diphtheria toxoid concentration over the range of 2.5 to 180 μg/ml by single sweep polarography; and even as low as 0.3μg/ml, diphtheria toxoid could be detected by differential pulse polarography. The decreased peak current value of diphtheria toxoid is proportional to diphtheria antitoxin present due to immuno-chemical binding reaction in the range of 2.5×10
-6
to 5×10
-5
IU/ml,which determines diphtheria antitoxin level homogencausly. The assays are sensitive specific, resproducible in operation The anodic peak has been applied to the determination of diphtheria toxoid in the triple vaccine.
Studies on Adsorptive Complex Wave of Lead -1,10-Phenanthroline
Zeng Yonghuai
1987, 8(9): 797-801.
Asbtract
(
)
PDF
(245KB) (
)
Related Articles
|
Metrics
In a supporting electrolyte containing 2×10
-5
Mphen, 0.06MHAc-0.14M NaAc and at pH5.1, we obtained an adsorptive complex wave of Lead-phen by Single-Sweep Polarography. It was found that the peak potential of the derivalivc wave is -0.49V (vs.SCE) and limit of detection for lead is 2.5×10
-8
M.We determined the composition of the complex which is 1:1 Pb(Ⅱ)-phen and confirmed that the wave is an adsorptive complex wave. The electrode processes may be presented as follow:Pb
2+
+ phen⇔Pb(phen)
2+
Pb(phen)
2+
⇔Pb(phen)
2d
2+
Pb(phen)
2d
2+
+2e+ Hg⇔Pb(Hg)+phen
The Bactericidal Activity of Some 2-Amino-5-Alkyl-1,3,4-Thiadiazoles
Hu Bingfang, Li Zengmin
1987, 8(9): 802-806.
Asbtract
(
)
PDF
(340KB) (
)
Related Articles
|
Metrics
With the purpose of seeking more effective, less hazardous bactericides against rice leaf blight, there were synthesized sixteen 2-amino-5-alkyl-l,3, 4-thiadia-zoles (Ⅰ) (among them seven new compounds) and eleven O,O-diphenyl phosp-horyl amides of various 2-amino-5-alkyl-1,3,4-thiadiazoles (Ⅱ), as well as four O,O-dialkyl-S-(N-l,3,4-thiadiazole) aminomethyldithio-phosphorates (Ⅲ). All these compounds were tested against xanthomonas campestris pv.oryzae or Agrobacterium tumcufacenec in vitro. The biological evaluation results showed that compounds of types Ⅰ and Ⅱ were active and the activity was correlative with the length of the n-alkyl at 5 position.
The Study of Heterocyclic Organophosphorus Comdpunds(Ⅵ)--Synthesis of 2-Thio(or Zero)-2-Carbalkoxy-1,3,2-Benzodioxaphospholes
Li Yugui, Liu Tingyang, Shen Yongfang, Yang Gungwei, Yao Yunsheng, Qiang Zhaolin
1987, 8(9): 807-812.
Asbtract
(
)
PDF
(380KB) (
)
Related Articles
|
Metrics
Four P(Ⅲ) benzodioxaphospholes (Ⅰ
1-4
) and seven P(Ⅴ) benzodioxaphos-pholes(Ⅱ
1-7
) were preparaed. The spectrum characteristics were reported. It was considered that the ratio rate of the E, Zstereoisomers of ethenyl was changed with the P(Ⅲ) valent state and the red shift in IRof the compounds Ⅱ
1-3
were observed.
A New Method of Synthesis of α-Bromocinnamamides
Wang Shuyu, Liu Weiqin, Li Renli
1987, 8(9): 813-818.
Asbtract
(
)
PDF
(466KB) (
)
Related Articles
|
Metrics
α,β-Dibromophenylpropionyl chloride reacting with organic amine (lower molecular weight) can yield a pair 01 cis and trans geometric isomers of α-bromocinnamamide. But the relative amounts of cis and trans isomers are influenced by the ratio of the amine employed. On the other hand the substituents on the phenyl ring and the solvents used in the reaction have some influence too. By this method and preparative TLC, we isolated and obtained eight pairs of geometric isomers including m-chloro-α-bromo-N-sec-butyl-cinramamides, p-bromo-α-bromo-N-isopropyl-cin-namamides, etc.
Studies on the Meerwein Arylation Reaction(Ⅰ)--Arylation of N-Vinylphthalimide
Hu Hongwen, Pan Yi, Xu Jinghua
1987, 8(9): 819-822.
Asbtract
(
)
PDF
(272KB) (
)
Related Articles
|
Metrics
N-Vinylphthalimide was treated with aromatic diazonium chlorides ArN
2
+
Cl
-
<Ar=o-BrC
6
H
4
-;p-BrC
6
H
4
-;o-ClC
6
H
4
-;p-ClC
6
H
4
-; 2, 4-Cl
2
C
6
H
3
-; 2,6-C
12
C
6
H
3
-;2,4,6-Br
3
C
6
H
2
-; p-CH,COC
6
H
4
-; m-NO C
6
H
4
-) in the presence of cuprous chloride to give the corresponding N-(2-ary1-1-chloroethyl) phthalimide.The latter compounds were transformed to N-(2-arylvinyl)phth--alimide by refluxing with N, N-diethylaniline.
The Construction of a Constant Temperature Environment-Continuous Titration Calorimeter and the Improvement of Thermogram Analysis
Chen Rongti(Y. T. Chen), Gu Zongxin, Chen Xuemin
1987, 8(9): 823-828.
Asbtract
(
)
PDF
(411KB) (
)
Related Articles
|
Metrics
A constant temperature environment-continuous titration calorimeter has been constructed in our laboratory with the components commercially available on the market. The tenability of this instrument has been tested and its sensitivity determined to be 9.91×10
-5
kmm
-1
. This calorimeter was chemically calibrated with the neutralization of strong acid and base (HCIO
4
+NaOH) and the value of △H
N
0
=-13.341 kcalmol
-1
was obtained which is quite agreeable with the literature. The results obtained from the measurement of the thermodynamic properties of Ag(Ⅰ)-pyridine complexation reactions conform nicely with those cited in the literiture. The data evaluation procedures have also been improved in the analysis of thermogram.
The Characteristics of Effect of Intraparticle Diffusion on the Kinetics of Redox Mechanism
Jin Yon, Yu Qiqaan, Liu Meiziao
1987, 8(9): 829-834.
Asbtract
(
)
PDF
(387KB) (
)
Related Articles
|
Metrics
The kinetics of oxidation of methanol to formaldehyde over Pb
0.88
Bi
0.06
La
0.02
Mo/SiO
2
catalyst was described by Redox mechanism of two stages.When the particles of catalyst increased to 3 mm in diameter, the effect of intraparticle diffusion strongly depended on the rate of oxidation of methanol to formaldehyde. The effectiveness factor of catalyst was determined by experiments to be 0.38-0.73.The kinetic equation of Redox mechanism in the presence of intraparticle diffusion of oxygen was interpretated by the theory of intraparticle diffusion and proved by experiments.The apparent activation energies of oxidation of methanol in the presence of intraparticle diffusion of oxygen were determined and interpreted by the kinetic experiments and a theoritical equation.
Surface Adsorption and Micelle Formation of 9-Ethoxy--Fatty Alcohols with Gaussian Distribution of Carbon Chain Length in Aqueous Solution
Xia Jiding, Sun Yan, Zhou Heyun
1987, 8(9): 835-838.
Asbtract
(
)
PDF
(234KB) (
)
Related Articles
|
Metrics
The effects of different carbon chain length with Gaussian distribution of 9-ethyoxy-fatty alcohol(AE
9
) on the surface adsorption, micelle formation were studied. Experimental results indicate that regular solution theory with nonideal miximg rule seems to be more reasonable than ideal mixing in calculating therm-odynamic parameters of this system. The efficiency and effectiveness of surface tension reduction and synergestic effect of mixed AE
9
solution can be increased by adjusting properly the carbon chain length distribution of polyoxyethylenated fatty alcohols.
Photophysical and Photochemical Properties of Diacetonitrile-Bis-(2,2'Bipyridine) Complex of Ruthenium(Ⅱ)
Chen Zhong
1987, 8(9): 839-841.
Asbtract
(
)
PDF
(216KB) (
)
Related Articles
|
Metrics
The pholophysical and photochemical properties of the complex Ru(bpy)
2
-(CH
3
CN)
2
(PF
6
)
2
in solvents and acidic solution were investigated. The complex exhibits stronger luminescence at 77K in solvents, The emission maximum is at 54Cnm and a second weaker band is at 580nm in methanol-ethanol. They are characterized by a band near G50nm and a second weaker band at 590nm in 1N H
2
SO
4
rnethanol.Emission lifetime is about 210 ns in methanol solution at 10℃. The complex to be irradiated at 254nm,283nm and 414nm in 0.lNH
2
SO
4
solution results in pseudo-first order photosubstitution reaction, producing cis-Ru(bpy)
2
-(CH
2
CN)(OH
2
)
2+
, the last photoprcduct is cis-Ru(bpy)
2
(CH
2
)
2
2+
. The quantum yields of disappearance for the complex are reported at irradiation wavelengths.
The Linear Themodynamical Relationships in Coordination Compounds--Linear Free Energy Relationships, Linear Enthalpy Relationships and Linear Entropy Relationships in the Ternary Mixed Coordination Compounds Formed from Amino-acids and 1,10-Phenan
Chen Ziyuan, Wang Shaohua
1987, 8(9): 842-844.
Asbtract
(
)
PDF
(132KB) (
)
Related Articles
|
Metrics
The stability constants of ternary mixed ligand coordination compounds formed from some amino-acids (serine, valine, alanine and α-amino-isobutyric) and 1,10-phenanthroline with Cu(Ⅱ) were determined by pH-meterically at 25±0.1℃, 35±0.1℃ and 45±0.1℃ in the presence of 0.16M KNO
3
Linear relationships not only exist between the stability of ternary mixed ligand coordination compound and the base strength of ligands but also exist between the formation enthalpy of coordination compounds and the protonalion enthalpy of the ligands and between the formation entropy of coordination compounds and the protonation entropy of the ligands as well.
Studies on the Radiation Chemistry of the Aqueous Solution of 1,8-Dihydroxy-Anthraquinone-β-D-Glucoside
Sun Hai, Yuan Rongyao, Wu Jilan
1987, 8(9): 845-850.
Asbtract
(
)
PDF
(329KB) (
)
Related Articles
|
Metrics
In this paper the radiolysis of the aqueous solution of 1, 8-dihydroxy anthra-quinone glucoside has been investigated, the results are as follows.1.OH radical reacted with 1,8-dihydroxy anthraquinone-β-D-glucocide leading to the radiolysis of glucoside but no glucosidic bond rupture was found.2.Two radiolysis products have been obtained. Product may be an aliphatic alcohol which comes from the decomposition of glucose radical. ProductⅡ is still a glucoside which may be a trihydroxy anthraquinone glucoside.3.Using competition kinetics we have got k
OH·+glucosidc
=2.9×10
9
mol
-1
s
-1
.
Kinetics of Methyl Methacrylate Bulk Radical Polymerization (Ⅰ)--Conformation and Concentration of Radical and Propagating Constant k
p
Tian Yuan, Zeng Yingguang, Wang Guobing, Qiu Zuwen, Shen Jiacong
1987, 8(9): 851-855.
Asbtract
(
)
PDF
(263KB) (
)
Related Articles
|
Metrics
By using TM
110
cavity and 2mm sample tube, the ESRspectra of the propagating radical in the polymerization system of methyl methacrylatc were recorded. The concentration and conformation of radicals and the propagating constant k
p
were measured.The results showed that the propagating reaction was a diffusion controlled process.
Polymerization of Polypropylene Oxide in the Presence of a Triethylaluminium-Monoalkyl-Phosphate Catalytic System and Study of
13
C-NMR Spectra of Polymer
Ye Hongwei, Wang Xinling, Hu Gengyuan, Yang Shilin
1987, 8(9): 856-858.
Asbtract
(
)
PDF
(217KB) (
)
Related Articles
|
Metrics
A catalytic system, (C
2
H
5
)
3
A1/ROPO(OH)
2
, exhibits higher activity in the polymerization of propylene oxide(PO), The polypropylene oxide and its crystalline acetone-insoluble fraction were determined by the
13
C-NMR.In the
13
C-NMR spectra of the PPO, we discovered the most direct way of identifying the two kinds of lines. As an illustration, the two kinds of lines in
13
C-NMR were due to results of methine and methylene carbons of a high molecular weight PPO, respectively. Chemical-shift and split of four configuration of isotactic, heterotactic and syndiotactic have already been compared for the PPOwith different catalytic systems, (C
2
H
5
)
3
A1/ROPO(OH)
2
, (C
2
H
5
)
3
A1/H
3
PO
4
,and(C
2
H
5
)
3
Al/AcAc/H
2
O.
Research of a Silicone Emulsion
Liu Hongyun, Wang Xiangxiao, Du Zuodong, Wang Xiujie, Zhou Yuqi, Shi Weizhen, Ma Juli
1987, 8(9): 859-861.
Asbtract
(
)
PDF
(285KB) (
)
Related Articles
|
Metrics
Reactive periods were determined for emulsifying polymerization of D
4
; put forward a emulsifying polymerization method about to add a initiating emulsion and the effect for every factors on the emulsifying polymerization and stabilization of the emulsion was discussed.
Author Login
Peer Review
Editor Work
Office Work
Special Issues
More...
Download
More...
Links
More...