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1.
Wu Lin Li Hong Chen Shao-feng Qin Yi-min Zong Zhi-ming Wei Xian-yong Zou Guo-lin 《武汉大学学报:自然科学英文版》2002,7(2):227-230
The reaction of acenaphthene with nitrobenzene was investigated in the presence of AlCl3. The results showed that the reaction proceeded via carboncation-electrophilic substitution reaction and free radical substitution
reaction pathway. The products of acenaphthenyl phenylamine and biacenaphthyl could be synthesized by this reaction. The influence
of the amount of AlCl3 and the temperature on the components of products were also studied in this reaction.
Foundation item: Supported by the National Nature Science Foundation of China (No. 29676045)
Biography: Wu Lin (1965-), male, Postdictor, research direction: PAHs catalytic conversion and its biologic toxicity. 相似文献
2.
Ammoxidation of 3,4-dichlorotoluene (DCT) to prepare 3,4-dichlorobenzonitrile (DCBN) over silica supported vanadium phosphorus
oxide catalysts has been studied. On the VPO/SiO2 catalyst, the influence of the reaction temperature, the molar ratio of air/DCT, the molar ratio of NH3/DCT in the feed gas and the space velocity (v
1) on the conversion, yield and selectivity was observed. The most appropriate reaction condition is: reactionT=673 K,n(DCT):n(NH3):n(air)=1:7:30 andv
1=250 h−1. At this optimum reaction condition, the conversion of DCT is 97.8%; the molar yield of DCBN is 67.4%. It was found that
the addition of element phosphorus can improve the yield of DCBN compared with VO/SiO2 catalyst.
Foundation item: Supported by Youth Chen-Guang Project of the Committee of Science and Technology of Wuhan (20015005042)
Biography: Huang Chi(1972-), male, Ph D, Lecture, research direction: ammoxidation. 相似文献
3.
SHAO Zhi-jun OU Yang-yan HU Qin ZENG Dan-li CHEN Zhang-ping 《武汉大学学报:自然科学英文版》2005,10(5):919-924
Substitution reactions of 5-(4-nitrophenyl)-10, 15,20-triphenylporphyrin (NO2 TPP) and its metal complexes with different nucleophilic reagents were studied for preparing asymmetric porphyrin. The reaction products are different with the nucleophilic reagents changing, and three different products were found. The first obtaining product was diporphyrin when NO2 TPP reacted with sodium phenoxide or diphenoxide in DMF solution; The second was reduced product 5-(4-aminophenyl)-10, 15, 20-triphenylporphrin-M (Ⅱ) when the metal (Ni,Zn) complex of NO2 TPP reacted with above nucleophilic reagents, as well as NO2 TPP reacted with lithium mercaptoethanolate or lithium thiophenolate; The third product CNTPP was achieved with the substitution of nitro group by cyanic anion when NO2 TPP reacted with radium cyanide. Above results were explained with reduction and single electron transfer reaction respectively. 相似文献
4.
This paper proposes a new infrared method to measure the start duration of GaAs substrate in chemical etching. When etching starts, the temperature of liquid-film will change because of heat release in the chemical reaction. As a result, the start duration of GaAs can be tested by collecting real-time in-frared thermal images in the course of temperature variation. Both theoretical analysis and experi-mental results show that the line shape liquid film of a 2-mm width is a good monitoring subject. By making use of the grey distribution change of a certain cross section of the line shape liquid film, the start duration of reaction between GaAs and H2SO4-H202-H20 is obtained. The start durations of reac-tion between GaAs substrate and H2SO4: H202: H20 (=5:1:50 and 15:3:50) solution are about 0.2 s and 0.3-0.4 s, respectively. This result and relative method will impulse the research of wet chemical etching technology of GaAs and so on. 相似文献
5.
The reaction of 5, 10, 15, 20-tetra-(4-pyridyl) porphyrin 1 with triruthenium dodecacarbonyl [Ru3(CO)12], zinc(II) acetate, copper(II) acetate, cobalt(II) acetate afforded complexes 2a−2d respectively. Treatment of 2a−2d with
Merrifield’s peptide resin obtained 3a−3d. The compounds 3a−3d reacted with methyl iodide respectively gave 4a−4d. New complexes
4a−4d have been identified by IR, UV-visible spectra, and AES.
Foundation item: Supported by the Natural Science Foundation of Hubei Province
Biography: LI Zao-ying (1949-), female, Associate professor. 相似文献
6.
A novel reaction system consisted of a supported TiO2 film electrode, a Ru−Ti oxide film electrode and air (oxygen) electrode is reported. The air (oxygen) electrode can provide
H2O2 continuously for homogeneous photochemical oxidation reaction on the spot. In this reactor, degradation reaction of aniline
occur from interface of TiO2 film to all solution which is irradiated by ultraviolet ray. The degradation rate of aniline was characterized by measuring
the change of chemical oxygen demand (COD) in solution under different conditions. It was found that the degradation rate
of aniline in the novel system increased apparently as compared with single heterogeneous photocatalysis and homogeneous photochemistry
system. It can be explained in terms of combining acts of heterogeneous photocatalysis and homogeneous photochemistry.
Foundation item: Supported by the National Natural Science Foundation of China (10791033)
Biography: CAI Nai-cai (1946-), male, Associate professor, Research direction: electrochemical catalysis and photocatalysis. 相似文献
7.
Liu Xian-li Wu Feng Liao Zhen-huan Li Shun-xing Deng Nan-sheng . School of Resource Environmental Science Wuhan University Wuhan Hubei China . Huangshi Polytechnic College Huangshi Hubei China . College of Chemistry Molecular Sciences Wuhan University Wuhan Hubei China 《武汉大学学报:自然科学英文版》2004,9(1):109-114
0 IntroductionTherehasbeenincreasingconcernabouttheenvironmentaleffectsofoestrogensandxenoestrogens[1 ] .17α ethynylestradiol(EE2 ) (Fig .1)isasyntheticestrogenicsteroidthathastherapeuticuses (e.g .Oralcontraception) .Syntheticestrogensaregenerallymorestableinwaterthannaturalestrogensandhavegreaterpotency.Theyaredifficulttobeabsolutelyremovedfromwastewatersbyprimaryandsecondarytreatment.Thedegradationchemistryofthiscom poundhasnotbeenextensivelystudied .Therearefewpublishedarticlesstudying… 相似文献
8.
A series of 2-nitro-5, 10, 15, 20-tetra (4-methoxyphenyl) porphyrinato metals were regioselectively synthesized with nitrate
salts as nitrating reagent in acetic acid/acetic anhydride for preparation of 2-substituted porphyrin. The influence of nitrate
salts and complex metal ion to the reaction were investigated. The extent of 2-nitration increased with the electronegativity
of the central metal. When Cu(NO3)2×3H2O was used as nitrating reagent, almost quantitative yields of 2-nitro porphyrin were obtained in the case of Cu (II) or Ni
(II) chelates, while Zn(II) or Mn(II) chelates gave 50% and 30% yields respectively. If Zn(NO3)2×10H2O was used as nitrating agent, no product was found for Cu(II) or Ni(II) chelates, 12% was found for Zn(II) chelates. The
other metal ion and nitrate salts were also found in quite different influence.
Foundation item: Supported by the National Natural Science Foundation of China (29872033)
Biography: Chen Zhang-ping (1946-), male, Professor, research direction, porphyrin. 相似文献
9.
A new chemiluminescence (CL) method for the determination of tetracycline and oxytetracycline is developed, based on the CL
reaction of tetracycline and oxytetracycline with Ru (bipy)3
2+ and Ce (IV). In sulfuric acid medium, the CL emission is generated upon continuous oxidtion of Ru(bipy)3
2+ by cerium (IV). The emission intensity is greatly enhanced when tetracycline and oxytetracycline are introduced into the
reaction system after acid degradation. Under the optimum conditions, the calibration curves are linear over the range of
8.0×10−8∼4.0×10−6 mol/L for tetracycline and of 2.0×10−7∼4.0×10−5 mol/L for oxytetracycline, with the detection limits are 4.2×10−8 mol/L for tetracycline and 1.5×10−7 mol/L for oxytetracycline, respectively. The proposed method was used for the determination of tetracycline and oxytetracycline
in pharmaceutical formulations with good results.
Foundation item: Supported by the National Natural Science Foundation of China and the Natural Science Foundation of Hubei
Province.
Biography: HAH He-you (1962), male, Associate profeddor, Ph.D graduate candidate. Present address, Department of Chemistry,
Huainan Teacher's College, Huainan. 相似文献
10.
The chemiluminescence (CL) of luminol-Cu (II) was applied to HPLC determination of ascorbic acid, which was separated by a
C18 reverse-phase column with a mobile phase of 0.25 mol/L HAc. The eluted ascorbic acid was mixed with 0.3 mmol/L luminol and
0.05 mol/L CuSO4. The light emission from the reaction of Cu(II) oxidized ascorbic acid and luminol was detected by a modified luminometer.
The detection limit was 3.6×10−6 mol/L for ascorbic acid at aS/N ratio of 3, and the linear calibration range was 2×10−4–2×10−3 mol/L. The relative standard deviation for 5 replicate injections of 1×10−3 mol/L ascorbic acid was calculated as 4.3%. The method was successfully applied to determination of ascorbic acid in juice
beverage.
Foundation item: National Natural Science Foundation of China (29605001)
Biography: Wu Feng-wu(1963-), male, research direction: analytical chemistry. 相似文献
11.
为探究加拿大一枝黄花(Solidago canadensis)在不同浓度下对盐胁迫和铝胁迫的耐受性,以加拿大一枝黄花为材料,采用室内生物测定的方法,利用 0、200、400、800、1600、3200 mg/L 不同浓度 Na Cl 和 AlCl3 溶液处理加拿大一枝黄花种子,并对其萌发特性进行比较研究。结果表明:(1)加拿大一枝黄花种子的发芽率随着Na Cl 浓度的增加而降低,与对照相比,800 mg/L 浓度的 Na Cl 溶液对其发芽率和发芽势产生显著抑制作用(P <0.05),当浓度为 1600 ~ 3200mg/L 时,发芽率和发芽势极显著降低(P < 0.01),当浓度为 800 ~ 3200 mg/L 时,加拿大一枝黄花发芽指数极显著降低(P < 0.01);(2)加拿大一枝黄花种子发芽率随着 AlCl3 浓度的增加而降低,与对照相比,200 ~ 3200mg/L 的 AlCl3 溶液对其发芽率、发芽势及发芽指数受到极显著抑制作用(P < 0.01)。(3)加拿大一枝黄花种子对盐胁迫... 相似文献
12.
Gao Le-ping Du Yu-min Zhang Dao-bin Shi Xiao-wen Zhan Huai-yu Song Wen-hua . School of Resource Environmental Science Wuhan University Wuhan Hubei China . State Key Laboratory of Pulp Paper Engineering South China University of Technology Guangzhou Guangdong China . Hubei Institute of Chemistry Wuhan Hubei China 《武汉大学学报:自然科学英文版》2003,8(4):1156-1160
0 IntroductionChitosanhasbeenwidelyusedinpharmaceu tical,agriculturalandindustrialfieldbe causeofitsintriguing properties[1 ] .Chemicalmethodstopreparechitosanfromchitinhavebeenbroadlystudiedincludingsolutionmethod ,meltedalkalinemethod,microwavesemi drymethod ,improvedLinelbergmethod ,dissolution precipita tionmethodandsoon ,inwhichalkalinewasallusedasthecatalyst[2 ] .Biologicalmethodwasapromisingwayinthatitproducedlittleenviron mentalpollutionanditsreactionconditionsweremild .However,thism… 相似文献
13.
Quantum chemical and topological study on the insertion reaction of dichlorcarbene with acetaldehyde 总被引:1,自引:0,他引:1
The insertion reaction mechanisms of siglet and striglet CCI2 with CH3CHO have been studied by using the DFT, NBO, CCSD(T) and AIM method. The geometries of reactions, transition state and products were completely optimized by B3LYP/6-31G(d). All the energy of the species was obtained at the CCSD(T)/6-31G(d,p) level. The calculated results indicated that all the major pathways of the reaction were obtained on the singlet potential energy surface. The singlet CCl2 can not only insert the Cα--H (reaction I) but also can react with Cβ--H (reaction ll). There are three main existing pathways and the products are P1 (CH3COHCCl2), P2 (CH2COHCHCl2) and P4[CHCl2CHCHOH] respectively. Reaction II happens more easily according to the energy changes and the barrier in rate-controlling step. In addition, the important geometries in domain pathways have been studied by AIM theory. And also, the energy changes of H in the inserted C--H bond have been investigated. 相似文献
14.
ZHU Xin-gong WU Zhi-yuan ZHAO Yong WANG MinCollege of Chemistry Molecular Sciences Wuhan University Wuhan Hubei China 《武汉大学学报:自然科学英文版》2004,9(6):957-961
0 IntroductionManganeseoxideshavebeenwidelystudiedasbatterycathodesbecauseofitslowcostandlowtoxicity .Muchefforthasbeenfocusedonthespinelphase ,γ MnO2 andse verallayeredmanganeseoxidesinaqueousandnon aqueous .Sothereismuchinterestinmanganeseoxidesforuseascathodematerialsforadvancedlithiumbatteriestoreplacetheexpensivelithiumcobaltornickelsystem .ButthespinelLixMn2 O4hasthelowerratecapabilityandlowertheoreti calcapacityandγ MnO2 hasunsatisfactoryreversibilityinaqueous,thereby ,theiradvant… 相似文献
15.
A gas diffusion electrode (air electrode) with a high current efficiency of electro-synthesizing H2O2 using O2 in air was prepared. The several systems with air electrode as cathode of electro-synthesizing H2O2 on the reaction spot for degrading aniline in aqueous—electro-Fenton system, photo-excitation electro-H2O2 system and photo-electro-Fenton system, were developed. The rates of decomposition of H2O2 and mineralization of aniline were experimentally measured respectively under different conditions, and the results indicated
there has an excellent parallel relation between decomposition rate of H2O2 and mineralization rate of aniline. Especially, photo-electro-Fenton system, where H2O2 is decomposed the fastest, is the best system of oxidizing and degrading organic toxicants. Compared photo-electro-Fenton
system with photo-Fenton system, important role is revealed in the interface of air electrode. In this paper, the mineralization
mechanism of aniline in the photo-electro-Fenton system was also discussed.
Foundation item: Supported by the National Natural Science Foundation of China (200710026) and Foundation of Environmental Sciences Academy
of Jiangsu Province.
Biography: Cao xiao-yu (1979-), male, Master candidate, research direction: Electrochemistry 相似文献
16.
Han Dong-dong Cheng Gong-zhen Ji Zhen-ping Zhang Bing-guang . College of Chemistry Molecular Sciences Wuhan University Wuhan Hubei China . The State Key Laboratory of Coordination Chemistry Nanjing University Nanjing Jiangsu China 《武汉大学学报:自然科学英文版》2004,9(1):93-98
0 IntroductionThemetalionsinmetallamacrocylesformedbysupramolecularself assemblycantaketrigonal,square planar,andtetrahe dralconfiguration[1 ,2 ] .Metallacrownisaspecialclassofmetalla macrocyle,theyareanalogoustocrownethersinbothstructureandfunctionexceptthatthemetalionsarenowtakingthepositionsofcoordinationatomsincrownether[3,4] .Themetallacrownswithdifferentnumberof [M—N—O]repeatunithavedifferentcavitysizes,suchas 9 MC 3[5 7] ,12 MC 4 [4,8 1 4 ] and 15 MC 5 [1 5] .Thereportedazameta… 相似文献
17.
By using an LKB-2277 bioactivity monitor and ampoule method, the fundamental thermogenesis curves of the metabolic process
of liver mitochondria fromCarassius auratus hybrid carps and the toxic effect of Na2SeO3 on it were studied at 28°C. From the thermogenesis curves, the thermokinetic equations were established under different condition.
The kinetics show that Na2SeO3 has toxic action on the metabolism process ofCarassius auratus hybrid carps liver mitochondria.
Foundation item: Supported by the National Science Foundation of China (29973030, 30170010 and 5020310), Chenguang Project of Wuhan and National
Postdoctor Foundation of China
Biography: Li Xi (1968-), female, Associate pofessor, research direction: biothermochemistry and biomaterials. 相似文献
18.
The fluorozirconate glasses ZBLANP (ZrF4−BaF2−LaF3−NaF−PbF2) doped with different Yb3+ concentration were prepared. The Raman spectra and absorption spectra are measured to substantiate the existence of phonon-assisted
emission. After analyzing the normalized absorption spectra of samples with different Yb3+-doped concentration, we calculated the maximum cooling effect in the 3 wt% Yb3+-doped sample pumped at 1 012.5 nm. The corresponding cooling capability is about −4.09 °C/W and the cooling efficiency reaches
1.76%.
Foundation item: Supported by the Key Science Foundation of Wuhan (9601P0223)
Biography: Xu Tian-ming (1978-), female, Master candidate, research direction: information optics and nonlinear optics. 相似文献
19.
Well adhered C3N4 films were prepared by Plasma Enhanced Chemical Vapor Deposition (PECVD) on industrial pure iron substrates using ternary
Si−N−C films as buffer layer. XRD measurement showed that the C3N4 films belong to the α-C3N4 phase. Electrochemical experiments showed that the corrosive resistance of the pure iron raised by two orders of magnitude
after being covered with the α-C3N4 coating.
Foundation item: Supported by the National Natural Science Foundation of China(19875037)
Biography: ZHANG Wei(1975-), male, Graduate student. Research direction: thin film. 相似文献